⚠ Backlog Grew on Falling SigningsLow threat

IBM (IBM) — threat to the moat

Consulting's backlog grew in 2025 only because old signings outlasted new ones; two such years would leave it shrinking.

The backlog grew by about $0.5 billion in 20251 even though signings fell 13.3%2. That is possible when contracts signed in stronger years are long, and revenue recognised in the year is less than new work booked. IBM's book-to-bill ratio for 2025 was 1.033.

Consulting book-to-bill, trailing twelve months1.03End 2025about 1.05Jun 2026IBM 2025 Annual Report, Form 10-Q Q2 2026
Just above one.

The margin of safety is thin. A book-to-bill just above one means the backlog is barely growing. Two years like 2025 would leave the backlog flat or lower.

There is a second point in the definition. Signings are "management's initial estimate"4, and contracts can be reduced or cancelled. The backlog is not the same as remaining performance obligations in the accounts, which cover a narrower set of committed work.

The 2024 signings that support today's backlog were unusually strong. IBM described them as "our strong performance in signings in 2024"5, and the $25,103 million recorded that year6 was about 21% above the $20,692 million of Consulting revenue7. Much of the backlog is that one year's work, still being delivered. As it runs off, 2026's signings have to replace it, and at $10,388 million for the first half8 they are running below 2024's pace.

This is a low threat because 2026 signings recovered, up 6.8% in the first half9. The threat sharpens if the trailing book-to-bill fell below 1.0, because the backlog would then begin to shrink and Consulting revenue would follow a year or two later.

References
  1. ReportedThe backlog grew by about $0.5 billion in 2025 even though signings fell 13.3%.
    IBM 2025 Annual Report (Form 10-K exhibit) - management discussion, consolidated financial statements and notes - management discussion of the Consulting segment: revenue by area, signings, book-to-bill and backlog. — FY2025 · publ. 24 February 2026 · source ↗
  2. ReportedThe backlog grew by about $0.5 billion in 2025 even though signings fell 13.3%.
    IBM 2025 Annual Report (Form 10-K exhibit) - management discussion, consolidated financial statements and notes - management discussion of the Consulting segment: revenue by area, signings, book-to-bill and backlog. — FY2025 · publ. 24 February 2026 · source ↗
  3. ReportedIBM's book-to-bill ratio for 2025 was 1.03.
    IBM 2025 Annual Report (Form 10-K exhibit) - management discussion, consolidated financial statements and notes - management discussion of the Consulting segment: revenue by area, signings, book-to-bill and backlog. — FY2025 · publ. 24 February 2026 · source ↗
  4. ReportedSignings are "management's initial estimate", and contracts can be reduced or cancelled.
    IBM 2025 Annual Report (Form 10-K exhibit) - management discussion, consolidated financial statements and notes - segment note: segment revenue, segment profit, margins and reconciliation to reported revenue. — FY2025 · publ. 24 February 2026 · source ↗
  5. ReportedIBM described them as "our strong performance in signings in 2024", and the $25,103 million recorded that year was about 21% above the $20,692 million of Consulting revenue.
    IBM 2025 Annual Report (Form 10-K exhibit) - management discussion, consolidated financial statements and notes - management discussion of the Consulting segment: revenue by area, signings, book-to-bill and backlog. — FY2025 · publ. 24 February 2026 · source ↗
  6. ReportedIBM described them as "our strong performance in signings in 2024", and the $25,103 million recorded that year was about 21% above the $20,692 million of Consulting revenue.
    IBM 2025 Annual Report (Form 10-K exhibit) - management discussion, consolidated financial statements and notes - management discussion of the Consulting segment: revenue by area, signings, book-to-bill and backlog. — FY2025 · publ. 24 February 2026 · source ↗
  7. Moat Explorer calcIBM described them as "our strong performance in signings in 2024", and the $25,103 million recorded that year was about 21% above the $20,692 million of Consulting revenue.
    Moat Explorer calculation from IBM's reported figures ($ millions unless stated). Segment mix 2025: Software 29,962 / 67,472 = 44.4% of segment revenue and 9,920 / 16,364 = 60.6% of segment profit; Consulting 21,055 / 67,472 = 31.2% and 2,464 / 16,364 = 15.1%; Infrastructure 15,718 / 67,472 = 23.3% and 3,458 / 16,364 = 21.1%; Financing 737 / 67,472 = 1.1% and 521 / 16,364 = 3.2%. Segment revenue below reported revenue: 60,530 - 59,621 = 909 (2022); 61,860 - 61,229 = 631 (2023); 62,753 - 62,510 = 243 (2024); 67,535 - 67,472 = 63 (2025). Growth: revenue 67,535 / 62,753 - 1 = 7.6% (2025); 62,753 / 61,860 - 1 = 1.4% (2024); Q2 2026 17,162 / 16,977 - 1 = 1.1%; Software 25,011 / 23,629 - 1 = 5.8%, 27,085 / 25,011 - 1 = 8.3%, 29,962 / 27,085 - 1 = 10.6%; Software Q2 2026 7,761 / 7,387 - 1 = 5.1%; Consulting 20,884 / 20,058 - 1 = 4.1%, 20,692 / 20,884 - 1 = -0.9%, 21,055 / 20,692 - 1 = 1.8%, 21,055 / 20,058 - 1 = 5.0% over three years, Q2 2026 5,327 / 5,314 - 1 = 0.2%; Infrastructure 14,593 / 15,288 - 1 = -4.5%, 14,020 / 14,593 - 1 = -3.9%, 15,718 / 14,020 - 1 = 12.1%, Q2 2026 3,835 / 4,142 - 1 = -7.4%; Financing 737 / 713 - 1 = 3.4%, Q2 2026 186 / 166 - 1 = 12.0%; Transaction Processing 8,603 / 7,714 - 1 = 11.5% and 8,603 - 7,714 = 889 added 2023-2025; Hybrid Cloud 7,327 - 5,827 = 1,500 added 2023-2025; 11% to 13% of 7,327 = 806 to 952 a year; OpenShift 30% x 2.0bn = 0.6bn a year; Infrastructure Support 5,100 / 6,021 - 1 = -15.3% (2021-2025) and 4,800 / 5,100 - 1 = -5.9%; research and development 8,316 / 7,479 - 1 = 11.2%; Software segment profit 9,920 / 7,012 - 1 = 41.5%; Consulting segment profit 2,464 / 1,871 - 1 = 31.7%; financing receivables 15,193 / 11,738 - 1 = 29.4%; total debt 62.0bn - 50.9bn = 11.1bn since 2022. Shares: mainframe-linked revenue 10,618 + 8,603 + 5,100 = 24,321, and 24,321 / 67,535 = 36.0%; Hybrid Cloud 7,327 / 29,962 = 24.5% of Software; OpenShift 2.0 / 24.6 = 8.1% of software ARR; June 2026 ARR 24.6bn / 2025 Software revenue 29.962bn = 82.1%; revenue outside the United States 40,643 / 67,535 = 60.2%, so about 60%; research and development 8,316 / 67,535 = 12.3% of revenue; quantum more than 10bn / 5 years = more than 2bn a year, and 2.0 / 8.316 = 24%, about a quarter; goodwill 67,717 / 151,880 = 44.6% of total assets; goodwill plus intangibles (67,717 + 11,391) / 151,880 = 52.1%; other assets 151,880 - 67,717 - 11,391 = 72,772; HashiCorp goodwill 4,684 / 7,433 = 63.0%; Confluent goodwill 7,238 / 11,602 = 62.4%, other net assets 11,602 - 7,238 = 4,364; stock-based compensation 1,685 / 16,364 = 10.3% of segment profit; Kyndryl spin 55,179 / 73,620 - 1 = -25.0% of 2020 revenue, about a quarter. Margins: Software Q2 2025 2,296 / 7,387 = 31.1%; Consulting Q2 2025 562 / 5,314 = 10.6%; Infrastructure Q2 2026 835 / 3,835 = 21.8% and Q2 2025 965 / 4,142 = 23.3%; total segment profit Q2 2026 4,092 / 17,110 = 23.9% and Q2 2025 4,003 / 17,009 = 23.5%; Financing Q2 2026 108 / 186 = 58% (reported 58.0%); pre-tax margin 10,328 / 67,535 = 15.3%; Global Technology Services 2020 117 / 27,039 = 0.4%; gross margin Q2 2026 9,907 / 17,162 = 57.7% and Q2 2025 9,977 / 16,977 = 58.8%. Red Hat: 7,327 / 35,100 = 20.9% of consideration; pre-tax at the Software margin 0.331 x 7,327 = 2,425, and 2,425 / 35,100 = 6.9%, about 7%; after a 21% tax 6.9% x 0.79 = 5.5%; revenue needed for 8% after tax 0.08 x 35,100 / (0.331 x 0.79) = 10,738, about 10.7bn, which is 10,738 / 7,327 = 1.47 times 2025 revenue: about 3.2 years at 12.5% growth, 4.4 years at 9% and 7.8 years at 5%. Cash and capital: acquisitions plus dividends 2025 8,294 + 6,255 = 14,549, and 14,549 / 14,734 = 98.7% of free cash flow; first half 2026 acquisitions 10.5bn / free cash flow 4.8bn = 2.2 times; dividends 6,255 / 10,593 = 59.0% of net income; Consulting backlog 31.9bn / 21.055bn = 1.5 years of revenue; remaining performance obligations 71bn - 68bn = 3bn lower in six months; pension risk transfers 16 + 6 + 1.2 = 23.2bn; defined-benefit obligations 14,460 + 29,872 = 44,332 against plan assets 18,073 + 26,733 = 44,806; free cash flow guidance 14.7bn + 1.0bn = 15.7bn. Further: revenue per employee 67,535 / 264.3 thousand = about 255,500 dollars; Q2 2026 Software share of segment profit 2,502 / 4,092 = 61.1%; first-half Software 14,813 / 13,722 - 1 = 8.0%; amortisation of acquired intangibles 2,166 / 1,627 - 1 = 33.1%; free cash flow 14.7 / 6.5 = 2.3 times (2021-2025); Q2 2026 Transaction Processing 2,208 - 2,030 = 178 lower, Data 1,782 - 1,499 = 283 higher, Hybrid Cloud 1,998 - 1,796 = 202 higher, Transaction Processing above Hybrid Cloud by 2,030 - 1,998 = 32; share price 225.51 / 332.46 - 1 = -32.2% from the 52-week high; first half 2026 Hybrid Cloud 3,903 / 3,483 - 1 = 12.1%, Transaction Processing 3,963 / 4,037 - 1 = -1.8%, Hybrid Infrastructure 4,678 / 4,512 - 1 = 3.7%, Infrastructure Support 2,483 / 2,515 - 1 = -1.3%, Automation 3,692 / 3,467 - 1 = 6.5%, Data 3,256 / 2,736 - 1 = 19.0%, Financing 406 / 357 - 1 = 13.7%, Strategy and Technology 5,829 / 5,702 - 1 = 2.2%, Intelligent Operations 4,770 / 4,680 - 1 = 1.9%; Strategy and Technology Q2 2026 2,933 / 2,920 - 1 = 0.4%; Infrastructure Support 2021 share 6,021 / 14,188 = 42.4%; Infrastructure 2020 pre-tax margin 1,654 / 14,533 = 11.4%; Consulting 2020 pre-tax margin 1,034 / 16,257 = 6.4%; buybacks 2015-2019 4,609 + 3,502 + 4,340 + 4,443 + 1,361 = 18,255; Hybrid Cloud 7,327 / 67,535 = 10.8% of revenue, about a tenth; acquisitions 2023 to June 2026 5.1 + 3.3 + 8.3 + 10.5 = 27.2bn; HashiCorp net of acquired cash and securities 7,433 - 929 - 331 = 6,173; ARR 24.6 - 21.3 = 3.3bn from end-2024 to June 2026; net interest excluding Financing 1,312 / 984 - 1 = 33.3%; 2024 signings 25,103 / 20,692 = 1.21, about 21% above revenue; generative AI book 12.5 - 9.5 = 3.0bn added in Q4 2025; EMEA growth gap 14.2 - 9.0 = 5.2 points; revenue 57,350 / 73,620 - 1 = -22.1% from 2020 as filed to 2021. Trailing twelve months to June 2026: revenue 67,535 - 31,519 + 33,079 = 69,095; net income 10,593 - 3,249 + 3,381 = 10,725; P/E 212,460 / 10,725 = 19.8; P/S 212,460 / 69,095 = 3.07 - growth rates and line totals. — FY2015-Q2 2026 · publ. September 2026 · source ↗
    Method: Arithmetic on figures reported in IBM's Annual Reports, Forms 10-Q, results releases and market data; operands shown in the source line.
  8. ReportedAs it runs off, 2026's signings have to replace it, and at $10,388 million for the first half they are running below 2024's pace.
    IBM Form 10-Q for the quarter ended 30 June 2026 - segment results, revenue categories, RPO, the Confluent acquisition and management discussion - Consulting segment results and signings. — Q2 2026 · publ. 23 July 2026 · source ↗
  9. ReportedThis is a low threat because 2026 signings recovered, up 6.8% in the first half.
    IBM Form 10-Q for the quarter ended 30 June 2026 - segment results, revenue categories, RPO, the Confluent acquisition and management discussion - Consulting segment results and signings. — Q2 2026 · publ. 23 July 2026 · source ↗
Sources
Generated September 28, 2026