The most useful number in construction economics right now is not a spending figure. It is a 3.9-month gap between two groups of contractors. Associated Builders and Contractors reported that its Construction Backlog Indicator fell to 8.0 months in July 2026, down 0.8 months from both June and a year earlier, based on a member survey conducted July 20 through August 4, as reported in trade coverage of the ABC release. Underneath that average, contractors with data center work reported 11.4 months of backlog while contractors without it reported 7.5 months.

What the survey found

The decline was broad. Every industry, region and company size experienced a decline in backlog in July, and the South remains the only region with larger backlog than one year ago, per the ABC results. Engineering News-Record characterized the drop as backlog that "plummets," noting the 8.0-month reading was the lowest since January.

Regional readings, published in Construction Executive's monthly economic roundup, show how uneven the market is, per that summary:

• Nationwide: 8.0 months in July, down from 8.8 in June.
• South: 10.1 months, down from 10.3.
• Northeast: 7.3 months, down from 8.0.
• Middle states: 7.1 months, down from 8.5.
• West: 6.9 months, down from 7.6.

ABC's Construction Confidence Index components remained above the neutral 50 threshold, indicating net expectations for growth over the next six months, but two of three fell. Sales expectations dropped to 61.2 from 63.6 and staffing to 62.3 from 62.7, while profit margin expectations rose to 52.7 from 52.4, according to the same roundup. The National Roofing Contractors Association reported the same component readings.

The two-tier market, quantified

ABC chief economist Anirban Basu was unusually direct about what the average conceals. "Backlog fell sharply in July and is down to the lowest level since January," he said. "The data center boom masks the depth of this weakness, as there is a lack of momentum in any other segment. The 88 percent of ABC contractors that are not under contract to work on a data center had an average 7.5 months of backlog. That compares poorly to the 12 percent that are under contract to work on data centers, which have 11.4 months of backlog." He added that the dynamic "has been particularly difficult for small and mid-size contractors," noting that backlog in the $30 million to $50 million annual revenue category fell to its lowest level since March 2020. All quotes are from the reported ABC release.

That last detail is the one to sit with. March 2020 was the onset of pandemic shutdowns. A mid-size commercial contractor with $30 million to $50 million in annual revenue is now looking at a forward workload comparable to that moment, without the corresponding crisis narrative or federal response.

Why it matters for construction professionals

Backlog is the industry's most direct forward indicator. It measures work already under contract, so a decline is not sentiment; it is a measured reduction in committed future revenue.

• The concentration is a business-model issue, not a market-cycle issue. If 12 percent of firms hold 11.4 months of work and 88 percent hold 7.5 months, the gap will show up in bid competition. Firms outside data center work are chasing a smaller pool of projects against more bidders, which compresses margins even as ABC's profit margin expectation index nudged up.
• Mid-size firms carry the most exposure. Large contractors are winning the mission-critical work. Small firms have lower overhead absorption thresholds and can survive on smaller jobs. The $30 million to $50 million tier has the fixed cost structure of a large firm without the qualifications for hyperscale work.
• Regional divergence is now material. A West Coast contractor at 6.9 months and a Southern contractor at 10.1 months are operating in different economies. Firms in the Northeast at 7.3 months should not benchmark against national commentary written from Texas or Georgia.

Construction Executive's roundup also flagged that excluding data centers, private nonresidential spending is down nearly 8.0 percent over the past year, and that materials prices rose only modestly in July but are likely to keep climbing given rebounding oil prices and ongoing escalation in iron, steel and copper, per that analysis.

Implications for owners, developers, contractors and subcontractors

For owners and developers, falling backlog is a buying opportunity with a caveat. More capacity and hungrier bidders mean better pricing on general conditions and fee, particularly outside mission-critical work. The caveat is that low-bid environments produce financially stressed contractors, and a contractor default in month eight costs more than the savings. Prequalify on balance sheet strength, bonding capacity and current backlog composition, not just price.

For general contractors, the immediate task is honest cash planning. Eight months of backlog against a typical overhead structure leaves limited room for error. Firms should be reviewing their work-in-progress schedules for margin erosion, tightening change order discipline, and resisting the temptation to buy work at or below cost to keep crews busy. Basu's data suggests the mid-size tier is where that temptation will be strongest.

For subcontractors, the exposure question is customer concentration. If a large share of your backlog sits with general contractors whose own backlog is thin, your receivable risk is elevated. Ask for updated financial statements, watch payment cycles, and file liens on schedule rather than as a last resort.

What to watch next

• The August backlog reading, released monthly by ABC. A second consecutive sharp decline would confirm a trend rather than a one-month correction. Releases are indexed at ABC's news releases page.
• Whether the Confidence Index components fall below 50. All three remain in growth territory, and that is the current floor under contractor sentiment.
• The mid-size revenue tier. Backlog at the lowest level since March 2020 in the $30 million to $50 million category is the single most actionable data point in the release.
• Materials escalation, which Construction Executive expects to continue and which would squeeze margins further on fixed-price work already under contract.

Bottom line

An 8.0-month backlog is not a crisis reading in absolute terms. But it fell 0.8 months in a single month, declined across every region, industry and firm size, and hides a 3.9-month gap between the 12 percent of contractors working on data centers and the 88 percent that are not. Mid-size firms are the most exposed, with the $30 million to $50 million revenue tier reporting the thinnest backlog since March 2020. Contractors outside mission-critical work should be planning for tighter bid competition and defending margin rather than chasing volume.

Sources

• Associated Builders and Contractors Construction Backlog Indicator, July 2026, as reported by CTASC / Floor Daily — https://ctasc.com/abc-construction-backlog-fell-to-8-months-in-july/
• Construction Executive, "Construction Futures: August 2026 Economic Roundup" — https://constructionexec.com/article/construction-futures-august-2026-economic-roundup/
• Engineering News-Record, "Construction Backlog 'Plummets' in July, Says ABC Survey" — https://www.enr.com/articles/63470-construction-backlog-plummets-in-july-says-abc-survey
• National Roofing Contractors Association, "Contractors were less optimistic in July" — https://www.nrca.net/RoofingNews/contractors-were-less-optimistic-in-july.8-13-2026.13455/Details/Story
• Associated Builders and Contractors, Construction Backlog Indicator releases — https://www.abc.org/News-Media/News-Releases?Category=construction-backlog-indicator