A contractor with a large backlog can look like a safe choice: customers, work, demand stretching months into the future. A full pipeline is not the same thing as capacity. It does not necessarily mean a contractor has the people, cash and operating bandwidth to take on one more major project. That distinction is receiving more attention in the surety market, where underwriters are looking beyond whether contractors have work and asking whether they can actually execute it. For procurement teams, the result is a potentially useful, independent signal about contractor strength before an owner commits capital to a project. Growth itself is not the problem; whether a contractor's resources are growing along with its backlog is.
Contractor Backlog Hit 9.1 Months in May Before Falling Sharply in July
Associated Builders and Contractors reported a national average construction backlog of 8 months in July, down from approximately 9 months in May and the lowest reading since January. Contractors stayed optimistic anyway, citing expected gains in sales, staffing and profit margins over the following six months. That national average hides real differences by contractor and sector. ABC's July data showed firms with data center work carrying roughly 11.4 months of backlog, compared with about 7.5 months for firms without it, a gap that reflects how the megaproject boom has concentrated work among a smaller set of large contractors. Surety underwriters generally describe contractor capacity as more than financial strength. It encompasses management depth, workforce availability, equipment, and subcontractor and supplier relationships, and whether existing projects are already stretching those resources thin. A contractor can have the experience to perform a $100 million project without necessarily having the capacity to perform another $100 million project at the same time.
Sureties Are Already Doing Diligence Owners Need
Bonding capacity should not replace an owner's contractor qualification process. A bond is not a guarantee that a project will finish without problems. But the underwriting behind it provides another layer of scrutiny. Sureties typically examine financial statements, working capital, cash flow, work in progress, previous projects, management capabilities and a contractor's entire existing portfolio before deciding how much bonding credit to extend, a review that is becoming especially valuable as project sizes increase.
Bryce Grissom, senior vice president for surety at Travelers, said in a June interview that contractors are increasingly working through their largest jobs ever, with greater complexity and longer durations than in the past 12 to 18 months. A project that experiences declining profitability or cash-flow problems can put pressure on that contractor's balance sheet, so sureties look at what is already sitting inside the backlog, including expansion into new geographies, larger jobs, unfamiliar project types and new customers. For an owner, those are exactly the conditions that can determine whether impressive growth becomes an execution problem, one that tends to surface alongside the same scheduling pressure showing up across permitted infrastructure projects generally.
Surety Premiums Have Grown Steadily as Underwriting Gets More Selective
The positive side of tighter analysis is that contractors managing growth well can differentiate themselves. AM Best reported that federally funded infrastructure work has helped U.S. surety insurers post underwriting profits exceeding $2 billion for three consecutive years through 2024, with direct premium continuing to climb through 2025 even as pricing has remained comparatively stable. Travelers, one of the larger writers in the market, grew its own surety net written premiums 14% in the first quarter of 2026, citing broad-based infrastructure spending. That combination means the market is not broadly shutting contractors out; instead, underwriting is becoming more selective around the quality of the risk being written, and contractors with adequate liquidity, realistic schedules, strong project controls and manageable workloads have an opportunity to demonstrate that discipline through their bonding relationships.
Bonded Projects Finish Faster and Cost Less When Contractors Default
There is historical evidence that the screening matters. A 2022 study by Ernst & Young, commissioned by the Surety & Fidelity Association of America, found that 96% of surveyed owners and developers reported prequalification on bonded projects, compared with 61% on projects without a bond requirement. Respondents were also roughly five times more likely to report bonded projects finishing on time or ahead of schedule. The same study found that when defaults did occur, unbonded projects cost 85% more to complete than bonded ones. Sureties bring both capital and completion expertise an owner typically does not have in-house. For many owners, bonding enters the procurement conversation only after a contractor has already emerged as a preferred bidder. It may be more useful earlier. Procurement teams can ask about a contractor's single-project bonding limit, aggregate capacity, current bonded backlog, and whether upcoming awards it is pursuing would materially change the amount of work already committed, questions that matter most when a contractor is chasing several large projects simultaneously.
The goal is not to turn procurement professionals into surety underwriters. It is to recognize a simple fact: a surety has its own capital exposed to a contractor's performance, and therefore a financial reason to examine whether that contractor's growth is sustainable, the same discipline procurement teams are already applying to labor availability across their supplier base. Labor, financing and project complexity can all constrain execution. A contractor's ability to obtain meaningful surety support gives owners another piece of information they increasingly need: evidence that someone outside the bidding process has looked at that contractor's finances, backlog and operations, and is willing to put capital behind its ability to finish the job.
