[IBM] IBM: Q3 2026 Earnings Preview and the Deferred Mainframe Deals

IBM is an enterprise technology company that serves large corporations and government agencies through three businesses: software, consulting and infrastructure built around the mainframe[1]. IBM Q3 2026 earnings are the next event: the Drillr earnings calendar lists the company's next earnings call for 2026-10-21, covering the third quarter of 2026, ending September 30, 2026, although TipRanks labels that date an estimate based on past reporting schedules and IBM has not formally announced it[2]. In the most recently reported second quarter, revenue was about $17.2 billion, up only 1.1%[3], and operating (non-GAAP) earnings per share were $2.93, up 4.6%[4]; Software revenue was $7,761 million, up 5.1%[5], while Infrastructure revenue fell 7.4% and IBM Z mainframe revenue within it fell 42.0%[6]. On the second-quarter call, management said third-quarter constant-currency revenue growth should be consistent with the full-year range of 4% to 5%, with about a 1.5-point headwind from currency translation and an operating pre-tax margin similar to the second quarter's 19.2%[7]; the company's written guidance is full-year constant-currency revenue growth of 4% to 5%[8] and free cash flow up about $1 billion year over year[9]. On the analyst side, the TipRanks page showed a third-quarter consensus EPS estimate of $2.88 on 2026-09-20[10], and Zacks put the consensus third-quarter revenue estimate at $17.03 billion on July 22, the day of the second-quarter report[11].

Three things matter most in this report. The first is the Transaction Processing and IBM Z numbers, because most of the second-quarter shortfall came from mainframe deals that failed to close in the final weeks of June[12], and management said roughly one-third of those slipped deals had closed in the first three weeks of the third quarter and that two-thirds to three-fourths would close within six months[13]; the third quarter is the first time that claim meets reported numbers. The second is whether Software constant-currency growth can move from 4.6% back into the full-year expectation of 6% to 8%[14], and whether annual recurring revenue (ARR) of $24.6 billion keeps rising[15], which shows how much of the recurring growth does not depend on acquisitions. The third is whether year-to-date free cash flow turns to year-over-year growth and whether inventory comes down from $1,746 million[16], because first-half free cash flow of $4,760 million was essentially flat with the prior-year period[17] and the entire increase of about $1 billion for the year has to arrive in the second half.

Company Background and Business Structure

IBM is a century-old enterprise technology company that has reshaped its software portfolio through acquisitions in recent years. The company was incorporated in New York State in 1911, adopted its current name in 1924 and is headquartered in Armonk, New York; the annual report describes it as an enterprise technology company that helps clients apply hybrid cloud and artificial intelligence, drawing on software, consulting services aimed at delivering business outcomes, and deep incumbency in mission-critical infrastructure, all backed by its own research organization[1]. Red Hat forms today's Hybrid Cloud business line, IBM completed the acquisition of HashiCorp in 2025[18], and in 2026 it acquired Confluent for $31 per share in cash, a total equity value of about $11.3 billion[19]. Clients are mainly large enterprises and government agencies, and no single client accounted for 10% of total revenue in 2023, 2024 or 2025[20].

Software is IBM's largest and most profitable segment, with 2025 revenue of $29,962 million, about 44% of the total[21], and a segment profit margin of 33.1%[22]. It has four lines of business: Hybrid Cloud (Red Hat), Automation (which includes HashiCorp), Data (which includes watsonx and Confluent), and Transaction Processing, the software that runs on IBM Z mainframes. Clients buy it in two ways: about 80% of Software revenue comes from subscriptions, SaaS and maintenance recognized over the contract term, and the remaining 20% or so is licenses recognized up front, mainly enterprise license agreements (ELAs) tied to IBM Z that are large, concentrated at quarter-end and paid for out of clients' capital budgets[23].

Consulting and Infrastructure contribute roughly three-tenths and a little over two-tenths of revenue respectively, and they recognize revenue very differently from Software. Consulting generated $21,055 million of revenue in 2025[24] at a segment profit margin of 11.7%[25]; it is split into Strategy and Technology and Intelligent Operations, signs work project by project, recognizes revenue as the work is delivered, and its main cost is people. Infrastructure generated $15,718 million in 2025[26] at a segment profit margin of 22.0%[27]; it comprises Hybrid Infrastructure and the maintenance-oriented Infrastructure Support, and Hybrid Infrastructure in turn consists of IBM Z mainframes plus Distributed Infrastructure, meaning Power servers and storage. IBM Z is refreshed every few years, the z17 launched in June 2025, and revenue is released in a concentrated burst in the quarters that follow a launch.

The Financing segment is small but shapes the cash-flow definition, and the gap between the three main segments' gross margins is what makes revenue mix so important. Financing funds clients' purchases of IBM hardware, software and services[28], and the company excludes changes in its receivables from free cash flow. In 2025 the gross margin was 83.5% in Software[29], 58.6% in Infrastructure[30] and 28.1% in Consulting[31], so any rise or fall in the share of software and mainframes directly changes the company's overall gross margin.

Financial History and Current Position

2025 was IBM's fastest-growing year of the past three. Full-year revenue was $67.5 billion[32], up 7.6% as reported and 6.1% at constant currency[33]; revenue in the two prior years was $62,753 million and $61,860 million, so 2024 grew only about 1.4%[34]. The acceleration came from software and the mainframe: Software revenue grew 10.6%, Consulting 1.8% and Infrastructure 12.1%, with IBM Z up 51.7%[35].

Profit and cash flow improved together in 2025. Full-year operating pre-tax income was $12.7 billion and the margin rose 1.0 point to 18.8%[36]; operating EPS was $11.59, up 12.2%[37], and GAAP diluted EPS from continuing operations was $11.14[32]. Cash from operations was $13.2 billion for the year[38], and free cash flow after $1.6 billion of net capital investment was $14.7 billion, $2.0 billion more than a year earlier[39]; the company spent $8.3 billion on acquisitions, mainly HashiCorp, and paid $6.3 billion in dividends[18].

In 2026 the first quarter extended the strong growth and the second quarter changed the picture abruptly. First-quarter revenue was $15.9 billion, up 9% as reported and 6% at constant currency[40], with IBM Z up 51%[41]. Second-quarter revenue was about $17.2 billion, up only 1.1%[3]: Software was $7,761 million, up 5.1%[5]; Consulting was $5,327 million, essentially flat[42]; and Infrastructure was $3,835 million, down 7.4%, with IBM Z down 42.0% and Distributed Infrastructure up 37.3%[6]. Second-quarter gross margin was 57.7%, down 1.0 point[43]; the GAAP pre-tax margin fell 0.9 points to 14.4%, the operating pre-tax margin rose 0.3 points to 19.2%, operating EPS rose 4.6% to $2.93 and GAAP EPS fell 1.7% to $2.27[4].

Cash and the balance sheet tightened in the first half of 2026 because of acquisitions. First-half free cash flow was $4,760 million, essentially flat against $4,808 million a year earlier[17]. At the end of June, cash, restricted cash and marketable securities totaled $8,178 million, down $6,293 million from year-end, and total debt was $61,987 million, up $727 million from year-end[44]; the company has invested about $10.5 billion in acquisitions this year, $13.0 billion of total debt belongs to IBM Financing, and second-quarter dividends were $1.6 billion[45].

Operating Model

IBM's revenue is the sum of four segments, but each segment moves to its own rhythm. About 80% of Software revenue is recurring revenue from subscriptions, SaaS and maintenance, and the company calculates ARR by multiplying the current quarter's recurring revenue by four[15]; this portion grows steadily with renewals and expansion, and an acquisition lifts the base in one step, while the other 20% or so is up-front licenses that depend on whether large clients sign at quarter-end[23]. Consulting revenue comes from working through backlog: signings enter backlog first and are recognized as projects progress, so signings lead revenue by several quarters[46]. Infrastructure revenue swings widely with the IBM Z refresh cycle, and the four quarters after the z17 launch were the high point[26]; because IBM operates globally, reported and constant-currency growth often differ, and the gap was 1.5 points for full-year 2025[33].

Profit depends more on revenue mix than on total revenue. In 2025 the segment profit margins were 33.1% in Software[22], 22.0% in Infrastructure[27] and 11.7% in Consulting[25]; gross margin rises when software and IBM Z take a larger share, and when both fell short in the second quarter the company's gross margin dropped 1.0 point[43]. On the expense side, the company is pursuing productivity actions while raising its investment in product innovation; second-quarter operating expense fell 1.5% year over year[47], which still lifted the operating pre-tax margin to 19.2% despite the revenue shortfall[4]. GAAP results also carry amortization of acquired intangible assets and acquisition-related charges, so total expense rose 0.7% in the second quarter[47] and the GAAP pre-tax margin fell 0.9 points to 14.4%[4].

The keys to cash flow are the company's own definition and strong seasonality. IBM defines free cash flow as cash from operating activities less the change in Financing receivables, less net capital expenditures[17]; cash flow is highest in the fourth quarter, software subscriptions and maintenance are largely billed in advance, consulting is billed as work progresses, and hardware has to be built before it ships. In the first half of 2026 inventory rose from $1,220 million to $1,746 million[16], and together with higher cash taxes and net interest expense this offset the improvement in net income, leaving free cash flow flat year over year[48]. The main uses of cash are dividends, acquisitions and debt repayment: $6.3 billion of dividends and $8.3 billion of acquisitions in 2025[18], and about $10.5 billion of acquisition spending in the first half of 2026[45].

This model has several disclosure limits. Sub-businesses such as IBM Z and Distributed Infrastructure report growth rates but not dollar amounts, and organic Software growth, the revenue contributed by each acquisition and the savings from productivity actions are not disclosed either, so whether growth is organic or acquired, and whether margin expansion comes from savings or mix, can only be judged directionally. The share of slipped deals that has closed and the z17 cumulative comparison with the prior generation are management's figures and carry no dollar amounts[13]; the segment-level full-year expectations were given only verbally on the call, and these statements come from a call summary rather than a transcript, so the wording may differ. Financing receivables are excluded from free cash flow yet tie up real cash: they absorbed an additional $2.7 billion in 2025, linked to the z17 sales cycle[49], and then released $2,264 million in the first half of 2026[17], which lifted GAAP operating cash flow by $1,695 million, an increase that does not represent an operating improvement[50].

Industry and Competitive Position

IBM faces different rivals in each segment, and several of its main software rivals are also its partners. The software competitors listed in the annual report include Alphabet (Google), Amazon, BMC, Broadcom, Microsoft, Oracle, Salesforce, SAP and Splunk, a Cisco company[51]; Amazon, Microsoft, Oracle, Salesforce and SAP are also among the strategic partners IBM names, so IBM positions itself as a neutral platform across multiple clouds and on-premises environments rather than competing head-on with the hyperscalers for compute. The company says its differentiation comes from incumbency with enterprises, industry and process expertise, a partner ecosystem and a focus on innovation[52].

The competitive field in Consulting and Infrastructure is more fragmented, with rivals drawn from several kinds of company. Consulting competes with Accenture, Capgemini, India-based service providers, management consulting firms and the consulting practices of accounting firms[53]. Infrastructure competes with Dell, HPE, Intel, NetApp, Pure Storage and ODMs that supply re-branded systems[54], and cloud providers are also drawing demand away from traditional servers and storage.

IBM's clearest advantage is its mainframe incumbency, and that is also its weakness. Core transaction systems in banking, airlines, retail and similar industries run on IBM Z, which brings a high-margin hardware cycle and attached software revenue; but that revenue depends on the budget timing of a small number of large clients, and the annual report's risk factors state that a high volume of orders arrives at the end of each quarter, making results for a given period difficult to predict[55]. The available disclosures do not provide comparable segment data for the rivals, and IBM's statement in the annual report that it is a leader or among the leaders in each segment cannot be verified line by line with public figures.

Core Debates

Were the mainframe deals that failed to close in late June deferred, or are they gone?

This question directly decides which end of the full-year revenue range IBM lands on. Mainframe hardware and the large up-front software deals around it carry high gross margins, and the shortfall hit two segments at once: in the second quarter IBM Z revenue fell 42.0%[6], Transaction Processing fell 8.1% as reported and 8.6% at constant currency[5], and Infrastructure segment profit fell 13.4%[56]. The company pre-announced results on July 14 because of it[57] and then lowered its full-year constant-currency revenue growth expectation from more than 5% in April[58] to 4% to 5%[8].

The company's explanation is that clients temporarily redirected budgets to supply-constrained hardware. Both the letter to investors and the quarterly report say that in the last weeks of June clients shifted that quarter's capital spending toward servers, storage and memory to lock in supply ahead of expected price increases, so numerous large deals failed to close on time and drove the majority of the shortfall[59][12]; Distributed Infrastructure revenue grew 37.3% in the same quarter, its strongest on record, which points the same way as that explanation[6]. Management said on the call that about one-third of the slipped deals had closed in the first three weeks of the third quarter and that it anticipates two-thirds to three-fourths closing within six months[13], and it said cumulative z17 revenue over its first five quarters was nearly 130% of the prior-generation z16 at the same stage, with clients representing 85% of installed MIPS, the unit of mainframe capacity, maintaining or growing capacity[60].

A second explanation is equally consistent with the numbers available. The cycle naturally fades a year after the z17 launch while AI infrastructure keeps crowding enterprise capital budgets, so some large deals may shrink or be pushed out for a long time; IBM Z was still growing 51% in the first quarter[41] and swung to a 42.0% decline in the second, and the company has not separated how much of that came from the tough comparison and how much from slipped deals. Quarter-end concentration of signings is also a structural feature spelled out in the annual report[55], so even if the deals come back, the same shortfall could recur at the end of the fourth quarter.

The financial transmission of this debate is direct: installed-base mainframe clients sign hardware and enterprise license agreements on schedule, Transaction Processing and IBM Z revenue is recognized in that quarter, and the high gross margin lifts both segments' margins and the company's operating pre-tax income, so all three show a gap when deals slip out of the quarter. In the third quarter, watch whether Transaction Processing constant-currency growth can move from -8.6% back to the low-to-mid single-digit second-half growth management described[61], whether the closed share of slipped deals is updated, whether the IBM Z decline narrows and the z17 cumulative comparison with z16 stays above 120%, and whether the year-over-year decline in the 21.8% Infrastructure segment margin is smaller than the second quarter's 1.5 points[56]. If Transaction Processing stays near -8% while Distributed Infrastructure keeps growing rapidly, the budget shift was not a one-off; if management stops updating the closed share, this line of evidence, which rests only on verbal statements with no dollar amounts, breaks.

Can the recurring 80 percent of Software pull segment growth back into the 6-to-8 percent range?

Whether the recurring part of Software is really growing at close to a double-digit rate decides whether the swings in up-front deals are only a timing issue or mask a deeper slowdown. Software revenue was $29,962 million in 2025, up 9.1% at constant currency[21], and management's long-term target is double-digit growth; after growth dropped to 4.6% in the second quarter the full-year expectation was cut to 6% to 8%, with the high end assuming all slipped deals close and recurring revenue keeps accelerating in the second half, and the low end assuming transactional deal closing stays subdued[14].

The evidence in the filings supports growth in the recurring business. The quarterly report says about 80% of Software revenue is recurring and delivered healthy growth in the second quarter[23]; ARR was $24.6 billion, up about $2 billion year over year, and the company says the increase reflects Confluent as well as growth across other parts of the recurring base[15]. Hybrid Cloud (Red Hat) grew 10.9% at constant currency, driven by subscriptions and stabilization in consumption-based services, and OpenShift ARR is now over $2 billion[62], against $1.9 billion at the end of 2025[63]; Automation grew only 3.1%, and Data grew 18.4%, mainly because of Confluent[62].

The opposing evidence comes from the call summary: organic Software revenue was flat in the second quarter, which means growth of around 5% came largely from acquisitions[64]. The filings do not disclose organic growth or Confluent's revenue, so the two readings cannot be fully separated with current disclosure; Confluent was consolidated in the first quarter of 2026 and will lift year-over-year growth in the Data line and in ARR until the first quarter of 2027. Software gross margin fell 1.3 points to 82.6% in the second quarter, which the company attributed to innovation investment and product mix, while the segment profit margin still rose 1.1 points to 32.2%[65].

This debate reaches profit through ARR: enterprises subscribe to Red Hat, automation and data software, ARR rises and is recognized as revenue over the contract term, and a segment margin above 30% lifts the company's gross margin and operating pre-tax income; acquired ARR raises revenue too, but brings amortization and financing costs with it. In the third quarter, watch whether Software constant-currency growth is at least 6%, whether ARR is above $24.6 billion with a year-over-year increase of no less than about $2 billion (allowing for the translation effect of a stronger dollar), whether Hybrid Cloud stays in double digits and Automation recovers from 3.1%, and whether the segment margin keeps expanding year over year while gross margin declines. If Software growth returns above 6% but is driven entirely by Transaction Processing deals closing late, the question about the recurring part remains unanswered.

Consulting signings have grown for two straight quarters; when does revenue follow?

Consulting is about three-tenths of IBM's revenue, and whether it accelerates in the second half decides how heavily full-year guidance leans on the mainframe deals. Consulting grew only 0.4% at constant currency in 2025[24] and signings fell 13.3% for the year[66]; signings returned to growth in the first half of 2026, but revenue grew only 1.0% at constant currency, below the full-year low-to-mid single-digit growth expectation that management maintained[67]. In the second quarter Software and Infrastructure both came in below the company's expectations and only Consulting was in line[3].

The evidence is improving on both signings and profit. Second-quarter Consulting signings grew 5.9% at constant currency, the second consecutive quarter of growth, the trailing-twelve-month book-to-bill ratio was approximately 1.05 and backlog at the end of the period was $30.8 billion[46], compared with a book-to-bill ratio of 1.03 at the end of 2025[68]. The company says demand came from application modernization, data transformation and cybersecurity services[42]; second-quarter segment profit grew 15.1% and the margin rose 1.6 points to 12.1%, which the company attributed to productivity actions[69].

A recovery in signings does not necessarily produce an equal acceleration in revenue. The signings growth is built on a low 2025 base, AI-related contracts tend to run longer with less revenue up front, and AI-driven delivery efficiency also reduces revenue billed by the person-day; the call summary says generative AI was 50% of second-quarter signings and more than 30% of backlog, a proportion that does not appear in the filings[70]. Signings are themselves a management estimate affected by the timing of a few large contracts, so one quarter's growth cannot simply be extrapolated.

Transmission in this debate runs through backlog: clients sign business-transformation and AI-related contracts, signings enter backlog, projects are delivered and recognized as they progress, and utilization and delivery efficiency determine a segment margin of about 12%; when signings grow and revenue does not, the conversion cycle is lengthening or existing projects are shrinking. In the third quarter, watch whether Consulting constant-currency growth is above the second quarter's 1.1%, whether signings grow for a third consecutive quarter with book-to-bill no lower than about 1.05, how backlog changes from $30.8 billion (allowing for the translation effect of a stronger dollar), and whether the segment margin keeps expanding year over year. If revenue stays flat while the margin keeps expanding, the improvement is coming from squeezing delivery cost, and that has a ceiling; the competitors listed in the annual report include Accenture, Capgemini and India-based service providers[53], and AI delivery tools are changing the way this industry prices by the person-day.

Revenue guidance came down; what delivers the promised extra $1 billion of free cash flow?

Free cash flow is one of the two annual metrics management guides to, and it funds the dividend and deleveraging. Free cash flow was $14.7 billion in 2025[39] and dividends were $6.3 billion[18]; in the first half of 2026 the company invested about $10.5 billion in acquisitions[45], cash and marketable securities fell to $8,178 million and total debt stood at $61,987 million[44]. In July the company lowered revenue guidance yet kept its expectation that free cash flow will rise about $1 billion year over year[9], and on the call it raised the expected full-year expansion in operating pre-tax margin to about 100 basis points[71]; first-half free cash flow was flat year over year, so the whole increase has to come in the second half.

The path the company lays out is margin expansion plus an inventory reversal. First-half free cash flow was $4,760 million against $4,808 million a year earlier[17]; the company explains that the improvement in net income was offset by inventory, higher cash taxes and net interest expense, and that inventory rose because it proactively built stock in a supply-constrained environment to support anticipated second-half demand[48]. The second-quarter operating pre-tax margin was 19.2%, still up 0.3 points year over year even though revenue fell short[4]; management says productivity actions are running ahead of plan, that the inventory build will reverse into a tailwind in the second half, and that cash-tax and capital-expenditure headwinds were mostly concentrated in the first half[13].

Every link in that path carries uncertainty. The inventory build corresponds to Distributed Infrastructure demand, where the letter to investors cites a backlog of approximately $500 million[60], and if supply constraints ease or demand falls back, $1,746 million of inventory will not turn back into cash quickly. The company has also committed to invest more than $10 billion in quantum computing over the next five years[72], and net interest expense is higher after the acquisitions; the operating measure excludes acquisition-related charges, the GAAP pre-tax margin fell 0.9 points year over year in the second quarter, and the gap between the two measures is widening.

Transmission in this debate runs from margin to cash to debt: productivity actions and a larger software share expand the operating pre-tax margin and raise cash from operations; the cash tied up in first-half inventory returns after second-half shipments and becomes free cash flow, which pays a dividend of about $6.3 billion a year and keeps debt in check after the Confluent acquisition. In the third quarter, watch whether year-to-date free cash flow turns to year-over-year growth, whether inventory comes down from $1,746 million, whether the operating pre-tax margin is similar to 19.2% and not lower year over year, how spending is paced after $743 million of net capital expenditures in the first half, and whether the company reaffirms the full-year increase and gives timing for quantum computing spending. If inventory keeps rising in the third quarter while free cash flow declines year over year, the inventory-reversal argument will not have been validated; even if the numbers improve, the fourth quarter carries the largest share of free cash flow, so the third quarter can only indicate direction and cannot confirm the year.

Risks and Falsifiers

Quarter-end concentration of signings makes IBM's quarterly results hard to predict, and this risk has already materialized once. The annual report's risk factors state that a high volume of products is ordered at the end of each quarter, especially the fourth[55], and the second-quarter shortfall occurred in the last weeks of June[59]. It affects up-front Software revenue and IBM Z revenue every quarter and reaches profit through high gross margins; the company pre-announced on July 14 because of it and lowered its full-year constant-currency revenue growth expectation from more than 5% to 4% to 5%[8]. If third- and fourth-quarter results both land within the ranges the company has given and there is no further pre-announcement, this risk will not have materialized again in the second half of 2026.

Balance-sheet flexibility is lower after the acquisitions. The company paid about $10.5 billion in cash for Confluent in the first half, cash and marketable securities fell $6,293 million from year-end[44], and it newly committed to invest more than $10 billion in quantum computing over the next five years[72]. The exposure is the repayment pace and interest cost of $61,987 million of total debt, and the company says higher net interest expense is one reason first-half free cash flow was flat[48]. If total debt at the end of the third quarter is no higher than at the end of June, cash and marketable securities recover and year-to-date free cash flow grows year over year, this pressure is easing.

If AI infrastructure price increases and supply constraints persist, mainframe-related deals will be deferred further or shrink. Clients already prioritized servers, storage and memory in their capital budgets in June[12], and the exposure is the roughly 20% of Software revenue that is recognized up front plus IBM Z revenue in Infrastructure. Both carry high gross margins, and the second-quarter shortfall cut Infrastructure segment profit by 13.4%[56] and the company's gross margin by 1.0 point[43]. If Transaction Processing constant-currency growth turns positive in the third quarter and the closed share of slipped deals that management discloses reaches about two-thirds, this risk will not have materialized in the quarter.

Software growth is becoming more dependent on acquisitions. HashiCorp and then Confluent were consolidated and supported growth in the Automation and Data lines[62], and organic growth is not disclosed separately. The exposure is the quality of Software revenue growth and GAAP profit: the company has paid about $10.5 billion in cash for acquisitions this year, amortization of acquired intangible assets rose year over year in the second quarter[47], and the GAAP pre-tax margin fell 0.9 points[4]. If Hybrid Cloud holds double-digit growth, Automation growth recovers and ARR rises sequentially in the third quarter, the claim that the organic part is growing gains support.

AI is changing how consulting work is delivered and priced. The same project needs fewer person-days, and new contracts run longer with less recognized up front, so a recovery in signings may not convert into an equal increase in revenue. The exposure is about $5.3 billion of Consulting revenue each quarter[42]; constant-currency growth was 1.0% in the first half of 2026, below the full-year low-to-mid single-digit growth expectation that management maintained[67]. If third-quarter Consulting growth is above 1.1% at constant currency and the margin keeps expanding, signings are converting into revenue.

The whole increase in free cash flow rests on the second half. The first half was flat year over year and the full year needs about $1 billion more[9], which requires the inventory reversal, margin expansion and collections on the deferred deals to happen together. The exposure is the full-year free cash flow expectation the company has maintained, an increase of about $1 billion on 2025's $14.7 billion[39], along with a dividend of about $6.3 billion a year and the room to service $61,987 million of total debt. If year-to-date free cash flow turns to year-over-year growth and inventory comes down, the second-half path gains initial support.

What to Watch Next

• Mainframe deals, Transaction Processing: constant-currency growth was -8.6% in the second quarter of 2026[5]. A return to positive low-to-mid single-digit growth supports the deferral reading; staying near -8% while Distributed Infrastructure keeps growing rapidly means the budget shift was not a one-off.
• Mainframe deals, closed share of slipped deals: about one-third as of the July 22 call[13]. Reaching about two-thirds confirms management's account; if the figure is no longer updated, the evidence breaks.
• Mainframe deals, IBM Z and the z17 program: IBM Z revenue fell 42.0%[6] and z17 stood at nearly 130% of z16 on a cumulative basis[60]. Watch whether the decline narrows and the comparison stays above 120%; a drop below 120% weakens the claim that the cycle is still strong.
• Recurring Software, segment growth: 4.6% at constant currency[5]. Growth of at least 6% that does not rely only on late Transaction Processing deals would confirm the recurring engine.
• Recurring Software, ARR and Hybrid Cloud: $24.6 billion of ARR[15] and 10.9% Hybrid Cloud growth[62]. Stalled ARR or Hybrid Cloud slipping below double digits would weaken the case.
• Consulting conversion: revenue growth of 1.1% at constant currency[42], signings growth of 5.9% and book-to-bill of about 1.05[46]. Revenue above 1.1% with an expanding margin confirms conversion; flat revenue with an expanding margin means the improvement comes from cutting cost.
• Second-half cash, free cash flow and inventory: $4,760 million year to date[17] and $1,746 million of inventory[16]. Rising inventory alongside a year-over-year decline in free cash flow would falsify the inventory-reversal argument.
• Second-half cash, margin and debt: a 19.2% operating pre-tax margin[4] and $61,987 million of total debt[44]. A year-over-year margin decline or higher debt weakens the path to the full-year cash target.

Conclusion

IBM's profit is driven by high-margin software and mainframes, and the central tension today is whether the gap in up-front deals or the resilience of the recurring business better represents the second half. In 2025 the company reported $67.5 billion of revenue[32], $14.7 billion of free cash flow[39] and a 33.1% Software segment margin[22]; in the second quarter of 2026 revenue grew only 1.1%[3], IBM Z fell 42.0%[6] and Transaction Processing fell 8.6% at constant currency[5], while ARR reached $24.6 billion[15] and the operating pre-tax margin rose to 19.2%[4]. The company lowered revenue guidance yet kept its call for about $1 billion more free cash flow and raised its margin-expansion expectation, and whether all three can hold together depends on the return of the deferred deals and the reversal of inventory.

The two independent views published after the results look at different things and do not reach the same conclusion. Futurum Research argues that the second-quarter problem was less about broad demand erosion and more about spending-priority shifts inside large enterprise accounts: the shortfall centered on large, capital-expenditure-sensitive transactions tied to the mainframe and enterprise license agreements while recurring software continued to grow; it also says enterprise AI spending can crowd out adjacent software decisions when budgets are redirected toward constrained infrastructure supply, and that IBM "now needs to prove that delayed transactions convert and that go-to-market changes can reduce quarter-end concentration"[73]. The report by CNBC's Jordan Novet records the market's side of the reaction: even after analysts had cut estimates following the pre-announcement, second-quarter adjusted EPS of $2.93 was still below the $2.97 compiled by LSEG, revenue of $17.16 billion was below $17.58 billion, and the stock fell 25% on the day of the pre-announcement, its sharpest single-day decline on record[74]. The first view points the same way as management's "deferred, not gone" explanation in the mainframe debate but puts the burden of proof on IBM, and the quarter-end concentration it raises is the structural issue the annual report already describes; the second does not judge where the deals went, but it shows that investors did not simply accept the "timing only" account, so third-quarter Transaction Processing and IBM Z numbers will be treated as the first test of management's claim. These are outside interpretations, not facts and not a vote; sell-side research reports were not available in a publicly verifiable verbatim form, so coverage on that side has a gap.

The combination that would materially strengthen the current understanding is positive third-quarter Transaction Processing growth at constant currency, an updated closed share of slipped deals approaching two-thirds, Software constant-currency growth back above 6% with ARR still rising, and at the same time year-to-date free cash flow growing year over year with inventory down from $1,746 million. The combination that would weaken it is Transaction Processing still near -8% while Distributed Infrastructure keeps growing rapidly, a Software rebound that comes entirely from deals closing late, flat Consulting revenue, and inventory still rising while free cash flow declines year over year. The third quarter can only answer the question of direction, because the quarter-end concentration of signings remains in place and full-year free cash flow cannot be confirmed until the fourth quarter.

Sources

[1] IBM 10-K filed 2026-02-24 · Item 1 business description · 2026-02-24 · 10-K · https://www.sec.gov/Archives/edgar/data/51143/000005114326000010/ibm-20251231.htm

[2] Drillr earnings calendar · IBM earnings call scheduled 2026-10-21 (calendar last updated 2026-09-20); TipRanks lists October 21, 2026 as an estimate based on past reporting schedules · 2026-09-20 · earnings calendar

[3] IBM 10-Q filed 2026-07-23 · 2Q26 financial performance summary · 2026-07-23 · 10-Q · https://www.sec.gov/Archives/edgar/data/51143/000005114326000078/ibm-20260630.htm

[4] IBM 10-Q filed 2026-07-23 · 2Q26 pre-tax income, margins and EPS · 2026-07-23 · 10-Q · https://www.sec.gov/Archives/edgar/data/51143/000005114326000078/ibm-20260630.htm

[5] IBM 10-Q filed 2026-07-23 · 2Q26 Software revenue by line of business · 2026-07-23 · 10-Q · https://www.sec.gov/Archives/edgar/data/51143/000005114326000078/ibm-20260630.htm

[6] IBM 10-Q filed 2026-07-23 · 2Q26 Infrastructure revenue · 2026-07-23 · 10-Q · https://www.sec.gov/Archives/edgar/data/51143/000005114326000078/ibm-20260630.htm

[7] IBM Q2 2026 earnings call 2026-07-22 · third-quarter revenue and margin expectations · 2026-07-22 · earnings-call · https://www.ibm.com/investor/events/earnings-2q26

[8] IBM 8-K filed 2026-07-22 · updated full-year 2026 expectations · 2026-07-22 · 8-K · https://www.sec.gov/Archives/edgar/data/51143/000005114326000077/ibm-20260722.htm

[9] IBM 8-K filed 2026-07-22 · reaffirmed 2026 free cash flow expectation · 2026-07-22 · 8-K · https://www.sec.gov/Archives/edgar/data/51143/000005114326000077/ibm-20260722.htm

[10] TipRanks IBM earnings page (accessed 2026-09-20) · 3Q26 consensus EPS · 2026-09-20 · TipRanks · https://www.tipranks.com/stocks/ibm/earnings

[11] Zacks Equity Research 2026-07-22 · IBM (IBM) Matches Q2 Earnings Estimates · 2026-07-22 · Zacks Equity Research · https://finance.yahoo.com/markets/stocks/articles/ibm-ibm-matches-q2-earnings-211504766.html

[12] IBM 10-Q filed 2026-07-23 · 2Q26 shortfall explanation · 2026-07-23 · 10-Q · https://www.sec.gov/Archives/edgar/data/51143/000005114326000078/ibm-20260630.htm

[13] IBM Q2 2026 earnings call 2026-07-22 · slipped deals and free cash flow bridge · 2026-07-22 · earnings-call · https://www.ibm.com/investor/events/earnings-2q26

[14] IBM Q2 2026 earnings call 2026-07-22 · full-year Software growth expectation · 2026-07-22 · earnings-call · https://www.ibm.com/investor/events/earnings-2q26

[15] IBM 10-Q filed 2026-07-23 · 2Q26 Software ARR · 2026-07-23 · 10-Q · https://www.sec.gov/Archives/edgar/data/51143/000005114326000078/ibm-20260630.htm

[16] IBM 10-Q filed 2026-07-23 · inventory at June 30, 2026 · 2026-07-23 · 10-Q · https://www.sec.gov/Archives/edgar/data/51143/000005114326000078/ibm-20260630.htm

[17] IBM 10-Q filed 2026-07-23 · 1H26 free cash flow reconciliation · 2026-07-23 · 10-Q · https://www.sec.gov/Archives/edgar/data/51143/000005114326000078/ibm-20260630.htm

[18] IBM 10-K filed 2026-02-24 · FY2025 acquisitions and dividends · 2026-02-24 · 10-K · https://www.sec.gov/Archives/edgar/data/51143/000005114326000010/ibm-20251231.htm

[19] IBM 10-Q filed 2026-07-23 · Confluent acquisition consideration · 2026-07-23 · 10-Q · https://www.sec.gov/Archives/edgar/data/51143/000005114326000078/ibm-20260630.htm

[20] IBM 10-K filed 2026-02-24 · client concentration · 2026-02-24 · 10-K · https://www.sec.gov/Archives/edgar/data/51143/000005114326000010/ibm-20251231.htm

[21] IBM 10-K filed 2026-02-24 · FY2025 Software revenue · 2026-02-24 · 10-K · https://www.sec.gov/Archives/edgar/data/51143/000005114326000010/ibm-20251231.htm

[22] IBM 10-K filed 2026-02-24 · FY2025 Software segment profit · 2026-02-24 · 10-K · https://www.sec.gov/Archives/edgar/data/51143/000005114326000010/ibm-20251231.htm

[23] IBM 10-Q filed 2026-07-23 · recurring and transactional Software revenue · 2026-07-23 · 10-Q · https://www.sec.gov/Archives/edgar/data/51143/000005114326000078/ibm-20260630.htm

[24] IBM 10-K filed 2026-02-24 · FY2025 Consulting revenue · 2026-02-24 · 10-K · https://www.sec.gov/Archives/edgar/data/51143/000005114326000010/ibm-20251231.htm

[25] IBM 10-K filed 2026-02-24 · FY2025 Consulting segment profit · 2026-02-24 · 10-K · https://www.sec.gov/Archives/edgar/data/51143/000005114326000010/ibm-20251231.htm

[26] IBM 10-K filed 2026-02-24 · FY2025 Infrastructure revenue · 2026-02-24 · 10-K · https://www.sec.gov/Archives/edgar/data/51143/000005114326000010/ibm-20251231.htm

[27] IBM 10-K filed 2026-02-24 · FY2025 Infrastructure segment profit · 2026-02-24 · 10-K · https://www.sec.gov/Archives/edgar/data/51143/000005114326000010/ibm-20251231.htm

[28] IBM 10-K filed 2026-02-24 · Financing segment role · 2026-02-24 · 10-K · https://www.sec.gov/Archives/edgar/data/51143/000005114326000010/ibm-20251231.htm

[29] IBM 10-K filed 2026-02-24 · FY2025 Software gross margin · 2026-02-24 · 10-K · https://www.sec.gov/Archives/edgar/data/51143/000005114326000010/ibm-20251231.htm

[30] IBM 10-K filed 2026-02-24 · FY2025 Infrastructure gross margin · 2026-02-24 · 10-K · https://www.sec.gov/Archives/edgar/data/51143/000005114326000010/ibm-20251231.htm

[31] IBM 10-K filed 2026-02-24 · FY2025 Consulting gross margin · 2026-02-24 · 10-K · https://www.sec.gov/Archives/edgar/data/51143/000005114326000010/ibm-20251231.htm

[32] IBM 10-K filed 2026-02-24 · FY2025 results summary · 2026-02-24 · 10-K · https://www.sec.gov/Archives/edgar/data/51143/000005114326000010/ibm-20251231.htm

[33] IBM 10-K filed 2026-02-24 · FY2025 revenue growth at constant currency · 2026-02-24 · 10-K · https://www.sec.gov/Archives/edgar/data/51143/000005114326000010/ibm-20251231.htm

[34] IBM 10-K filed 2026-02-24 · total revenue 2025, 2024 and 2023 · 2026-02-24 · 10-K · https://www.sec.gov/Archives/edgar/data/51143/000005114326000010/ibm-20251231.htm

[35] IBM 10-K filed 2026-02-24 · FY2025 IBM Z revenue · 2026-02-24 · 10-K · https://www.sec.gov/Archives/edgar/data/51143/000005114326000010/ibm-20251231.htm

[36] IBM 10-K filed 2026-02-24 · FY2025 operating pre-tax income and margin · 2026-02-24 · 10-K · https://www.sec.gov/Archives/edgar/data/51143/000005114326000010/ibm-20251231.htm

[37] IBM 10-K filed 2026-02-24 · FY2025 operating EPS · 2026-02-24 · 10-K · https://www.sec.gov/Archives/edgar/data/51143/000005114326000010/ibm-20251231.htm

[38] IBM 10-K filed 2026-02-24 · FY2025 cash from operations and dividends · 2026-02-24 · 10-K · https://www.sec.gov/Archives/edgar/data/51143/000005114326000010/ibm-20251231.htm

[39] IBM 10-K filed 2026-02-24 · FY2025 free cash flow · 2026-02-24 · 10-K · https://www.sec.gov/Archives/edgar/data/51143/000005114326000010/ibm-20251231.htm

[40] IBM 8-K filed 2026-04-22 · 1Q26 revenue highlights · 2026-04-22 · 8-K · https://www.sec.gov/Archives/edgar/data/51143/000005114326000036/ibm-20260422.htm

[41] IBM 8-K filed 2026-04-22 · 1Q26 segment results · 2026-04-22 · 8-K · https://www.sec.gov/Archives/edgar/data/51143/000005114326000036/ibm-20260422.htm

[42] IBM 10-Q filed 2026-07-23 · 2Q26 Consulting revenue · 2026-07-23 · 10-Q · https://www.sec.gov/Archives/edgar/data/51143/000005114326000078/ibm-20260630.htm

[43] IBM 10-Q filed 2026-07-23 · 2Q26 gross margin · 2026-07-23 · 10-Q · https://www.sec.gov/Archives/edgar/data/51143/000005114326000078/ibm-20260630.htm

[44] IBM 10-Q filed 2026-07-23 · cash and total debt at June 30, 2026 · 2026-07-23 · 10-Q · https://www.sec.gov/Archives/edgar/data/51143/000005114326000078/ibm-20260630.htm

[45] IBM 8-K filed 2026-07-22 · 2Q26 cash flow and balance sheet · 2026-07-22 · 8-K · https://www.sec.gov/Archives/edgar/data/51143/000005114326000077/ibm-20260722.htm

[46] IBM 10-Q filed 2026-07-23 · 2Q26 Consulting signings, book-to-bill and backlog · 2026-07-23 · 10-Q · https://www.sec.gov/Archives/edgar/data/51143/000005114326000078/ibm-20260630.htm

[47] IBM 10-Q filed 2026-07-23 · 2Q26 expense drivers · 2026-07-23 · 10-Q · https://www.sec.gov/Archives/edgar/data/51143/000005114326000078/ibm-20260630.htm

[48] IBM 10-Q filed 2026-07-23 · 1H26 free cash flow drivers and inventory build · 2026-07-23 · 10-Q · https://www.sec.gov/Archives/edgar/data/51143/000005114326000078/ibm-20260630.htm

[49] IBM 10-K filed 2026-02-24 · FY2025 financing receivables and z17 · 2026-02-24 · 10-K · https://www.sec.gov/Archives/edgar/data/51143/000005114326000010/ibm-20251231.htm

[50] IBM 10-Q filed 2026-07-23 · 1H26 operating cash flow drivers · 2026-07-23 · 10-Q · https://www.sec.gov/Archives/edgar/data/51143/000005114326000078/ibm-20260630.htm

[51] IBM 10-K filed 2026-02-24 · Software competitors · 2026-02-24 · 10-K · https://www.sec.gov/Archives/edgar/data/51143/000005114326000010/ibm-20251231.htm

[52] IBM 10-K filed 2026-02-24 · competition overview · 2026-02-24 · 10-K · https://www.sec.gov/Archives/edgar/data/51143/000005114326000010/ibm-20251231.htm

[53] IBM 10-K filed 2026-02-24 · Consulting competitors · 2026-02-24 · 10-K · https://www.sec.gov/Archives/edgar/data/51143/000005114326000010/ibm-20251231.htm

[54] IBM 10-K filed 2026-02-24 · Infrastructure competitors · 2026-02-24 · 10-K · https://www.sec.gov/Archives/edgar/data/51143/000005114326000010/ibm-20251231.htm

[55] IBM 10-K filed 2026-02-24 · risk factor on quarter-end order concentration · 2026-02-24 · 10-K · https://www.sec.gov/Archives/edgar/data/51143/000005114326000010/ibm-20251231.htm

[56] IBM 10-Q filed 2026-07-23 · 2Q26 Infrastructure margins · 2026-07-23 · 10-Q · https://www.sec.gov/Archives/edgar/data/51143/000005114326000078/ibm-20260630.htm

[57] IBM 8-K filed 2026-07-14 · preliminary 2Q26 results · 2026-07-14 · 8-K · https://www.sec.gov/Archives/edgar/data/51143/000005114326000070/ibm-20260714.htm

[58] IBM 8-K filed 2026-04-22 · full-year 2026 expectations in April · 2026-04-22 · 8-K · https://www.sec.gov/Archives/edgar/data/51143/000005114326000036/ibm-20260422.htm

[59] IBM 8-K filed 2026-07-14 · CEO letter on the 2Q26 shortfall · 2026-07-14 · 8-K · https://www.sec.gov/Archives/edgar/data/51143/000005114326000070/ibm-20260714.htm

[60] IBM 8-K filed 2026-07-14 · CEO letter on z17 program and backlog · 2026-07-14 · 8-K · https://www.sec.gov/Archives/edgar/data/51143/000005114326000070/ibm-20260714.htm

[61] IBM Q2 2026 earnings call 2026-07-22 · second-half Transaction Processing expectation · 2026-07-22 · earnings-call · https://www.ibm.com/investor/events/earnings-2q26

[62] IBM 10-Q filed 2026-07-23 · 2Q26 Hybrid Cloud, Automation and Data growth · 2026-07-23 · 10-Q · https://www.sec.gov/Archives/edgar/data/51143/000005114326000078/ibm-20260630.htm

[63] IBM 10-K filed 2026-02-24 · OpenShift ARR at year-end 2025 · 2026-02-24 · 10-K · https://www.sec.gov/Archives/edgar/data/51143/000005114326000010/ibm-20251231.htm

[64] IBM Q2 2026 earnings call 2026-07-22 · organic Software growth and ARR growth · 2026-07-22 · earnings-call · https://www.ibm.com/investor/events/earnings-2q26

[65] IBM 10-Q filed 2026-07-23 · 2Q26 Software margins · 2026-07-23 · 10-Q · https://www.sec.gov/Archives/edgar/data/51143/000005114326000078/ibm-20260630.htm

[66] IBM 10-K filed 2026-02-24 · FY2025 Consulting signings · 2026-02-24 · 10-K · https://www.sec.gov/Archives/edgar/data/51143/000005114326000010/ibm-20251231.htm

[67] IBM Q2 2026 earnings call 2026-07-22 · full-year Consulting expectation · 2026-07-22 · earnings-call · https://www.ibm.com/investor/events/earnings-2q26

[68] IBM 10-K filed 2026-02-24 · Consulting book-to-bill at year-end 2025 · 2026-02-24 · 10-K · https://www.sec.gov/Archives/edgar/data/51143/000005114326000010/ibm-20251231.htm

[69] IBM 10-Q filed 2026-07-23 · 2Q26 Consulting margins · 2026-07-23 · 10-Q · https://www.sec.gov/Archives/edgar/data/51143/000005114326000078/ibm-20260630.htm

[70] IBM Q2 2026 earnings call 2026-07-22 · generative AI share of Consulting signings and backlog · 2026-07-22 · earnings-call · https://www.ibm.com/investor/events/earnings-2q26

[71] IBM Q2 2026 earnings call 2026-07-22 · full-year margin expansion expectation · 2026-07-22 · earnings-call · https://www.ibm.com/investor/events/earnings-2q26

[72] IBM 8-K filed 2026-07-22 · operational focus areas and margin expectation · 2026-07-22 · 8-K · https://www.sec.gov/Archives/edgar/data/51143/000005114326000077/ibm-20260722.htm

[73] Futurum Research 2026-07-27 · IBM Q2 FY 2026: Software Growth Continues as Mainframe Purchases Slow · 2026-07-27 · Futurum Research · https://futurumgroup.com/insights/ibm-q2-fy-2026-software-growth-continues-as-mainframe-purchases-slow/

[74] CNBC 2026-07-22 · IBM lowers full-year forecast after earnings warning · 2026-07-22 · CNBC · https://www.cnbc.com/2026/07/22/ibm-q2-earnings-report-2026.html