# Architecture Billings Keep Weakening. What to Do Before 2027 > The AIA/Deltek ABI read 47.2 in August, extending the longest slump in the index's history. What a weak leading indicator means for A/E pursuits into 2027. _By Oswald B. · Published 2026-07-13 · Updated 2026-09-25_ The AIA/Deltek Architecture Billings Index read 47.2 in August 2026, up slightly from 46.6 in July. Any score below 50 means billings are shrinking, and AIA says the slump has run nearly three and a half years, the longest in the index's history. Because design billings lead construction by nine to twelve months, this is a 2027 signal, not a 2026 report card. Here is the strange part: this slump ran all summer while the trade press celebrated [record design revenue](/blog/design-revenue-boom-mid-market). Both are true. One looks backward. The other is telling you what your proposal pipeline does next. ## What Is the Architecture Billings Index? The ABI is a monthly diffusion index from AIA and Deltek, built from a survey of architecture firm billings. A score of 50 means billings held flat; anything below means more firms reported shrinking billings than growing ones. Historically, the index leads nonresidential construction activity by roughly nine to twelve months, which is why owners, contractors, and A/E firms read it as a forward signal. ## What the Last Four Months of the ABI Show | Month | ABI score | What AIA highlighted | | ----------- | --------- | -------------------------------------------------------------------------- | | May 2026 | 44.5 | Lowest reading since January; inquiries dipped below 50 | | June 2026 | 47.3 | Decline eased; design contracts came close to growth | | July 2026 | 46.6 | Slump reached nearly 3.5 years, the longest in the index's history | | August 2026 | 47.2 | Share of firms reporting declines eased slightly; overall trend still down | Source: AIA/Deltek ABI monthly releases, including [July](https://www.aia.org/about-aia/press/architecture-firm-billings-remained-soft-july) and [August](https://www.aia.org/about-aia/press/architecture-firms-continue-face-soft-business-conditions-0) 2026. August was the first month in a while where the picture split. [AIA's August release](https://www.aia.org/about-aia/press/architecture-firms-continue-face-soft-business-conditions-0) put the Midwest at 50.7, modest growth for the first time in nearly a year, and the West at 49.8, essentially flat. The Northeast fell to 40.7, its lowest level since 2020. Commercial/industrial firms edged above 50 (50.4) while institutional sat at 47.0. Project inquiries held at 50.8, but the design contracts index stayed below 50 at 48.3: clients are still asking, and fewer of those conversations are turning into signed work. The outlook is getting worse, not better. The share of firms expecting billings to decline rose from 21 percent at the end of the first quarter to 29 percent by the end of the third. ## Why a Record Year and a Weak ABI Are Both True Revenue rankings are a rearview mirror. The record numbers published this summer are last year's billings, won on pursuits from a year or two before that. The ABI is the windshield: it measures the work entering the front of the funnel right now. A firm can be at capacity today, staffed against a healthy backlog, while the leading indicator that feeds its 2027 backlog quietly turns down. For civil and infrastructure firms there is an honest caveat: the ABI surveys architecture firms, so it reads most directly on buildings and private development. Public-sector work rides funding cycles more than billings surveys. But that is not comfort this year. IIJA's authorizations expire September 30, and its House replacement, the BUILD America 250 Act, cleared committee in May without a floor vote. Congress bridged the gap instead: the [Continuing Appropriations and Extensions Act, 2027 (H.R. 6500)](https://www.congress.gov/bill/119th-congress/house-bill/6500/text), signed September 2, 2026, extends surface transportation programs through December 11, 2026, without IIJA's advance appropriations. So the public side of the pipeline carries [its own concentration risk](/blog/go-no-go-funding-concentration) at the same time the private-side indicator is weak. When both halves of the market wobble at once, the differentiator is not optimism. It is selection. ## What Should Firms Do When the Pipeline Thins? You cannot out-volume a thinner market. Chasing everything that moves in a soft market is how proposal teams burn out producing responses that score in the middle of the pack. The firms that come through a slowdown in position to grow do three things while the pipeline is still full. 1. **Tighten go/no-go now, not after the drought arrives.** Discipline installed during plenty looks like strategy; installed during scarcity it looks like panic, and it usually arrives too late. Re-run your [go/no-go framework](/blog/go-no-go-decision-framework) with harder fit criteria this quarter. When fewer RFQs circulate, every low-fit pursuit you chase crowds out a high-fit one you could have won. 2. **Check what your pipeline is concentrated in.** A pursuit-by-pursuit go/no-go can pass every test while the portfolio quietly stacks onto one funding source or one softening sector. With the private leading indicator weak and federal surface-transportation funding extended only to December 11, [correlated exposure](/blog/go-no-go-funding-concentration) is the risk to audit before you need the answer. 3. **Drive your miss rate toward zero.** AEC firms already [fail to respond to 10 to 19 percent of the qualified RFPs they receive](/blog/rfp-miss-rate), mostly because assembling the response takes longer than the window allows. In a fat market, a missed RFP is a statistic. In a thin one, it is a client relationship you may not get invited back to. If the market is about to shrink the number of opportunities that arrive, answering all of them stops being operational hygiene and becomes the growth strategy. The September print lands in late October. Maybe it recovers; 29 percent of firms now expect it will not. The move is the same either way, because a firm that selects harder and answers everything it selects is positioned for both the market that softens and the one that surprises you. ## Frequently Asked Questions ### What is the Architecture Billings Index? The ABI is a monthly economic indicator from AIA and Deltek that tracks whether architecture firm billings grew or shrank. Scores above 50 mean growth; below 50 means contraction. Because design work precedes construction, the index is widely read as a nine-to-twelve-month leading indicator for nonresidential construction activity. ### Does the ABI matter for civil and infrastructure firms? Indirectly but meaningfully. The survey covers architecture firms, so it reads most directly on buildings and private development. Civil and infrastructure work follows public funding cycles more closely. Read the ABI as the private-side half of your market signal, alongside funding news like IIJA reauthorization, not as a substitute for it. ### How long until a weak ABI shows up in actual work? The historical lead is roughly nine to twelve months to construction activity. For proposal teams the practical translation is earlier: fewer design-phase starts now means fewer downstream RFQs and teaming invitations forming through 2027, which is why the response is pursuit selection now rather than cost cutting later. ### Should firms chase more pursuits when the market softens? Chase fewer, answer more. A softening market rewards firms that tighten go/no-go, pick pursuits they can genuinely differentiate on, and then respond to every opportunity that passes the filter. Volume without the capacity to respond well produces middle-of-the-pack scores and missed deadlines, which cost more in a thin market than a fat one. --- Canonical HTML: https://rfpm.ai/blog/architecture-billings-index-2026 · Site overview: https://rfpm.ai/llms.txt · Sitemap: https://rfpm.ai/sitemap.xml