Data center work is the contractor market's dividing line

In the Associated Builders and Contractors' August backlog reading, data center work has become the line between a contractor with a book and one without: firms holding data center awards reported 9.9 months of work in hand, firms watching the boom from the sidelines reported 8.3, and the 1.6-month spread is the only figure in the report that locates the construction cycle with any precision.

More contractors won data center work in August, narrowing the gap between the two camps, according to ABC chief economist Anirban Basu, and only the largest firms—those above $100 million in revenue—gave up backlog, a 0.2-month trim that is noise against a 9.9-month book. Sales and profit-margin readings both improved, and all three ABC components point to growth over the next six months. General contractors are not the ones absorbing this cycle's risk; their customers are.

The constraint is now showing up on labor: Basu flagged a sharp increase in contractors volunteering labor shortages in the survey, with construction job openings near a two-year high, and the share of contractors planning to cut staffing over the next six months climbed to 12.3%, the highest since December 2025. ABC economist Zack Fritz traced that split to the data center haves and have-nots: firms with the work cannot find specialty trade contractors, while firms without it face demand that keeps softening.

Power remains the binding constraint on the buildout, as this publication has argued, with project counts nearly tripling in five months while interconnection queues decide what ever gets energized. The backlog data adds a second gate immediately behind the first: a power right gets a project into the queue, and a mechanical and electrical crew gets it to an energization date. Owners who have secured megawatts but not the trades that wire them are holding an option, not a schedule.

The judgment embedded in the 9.9-versus-8.3 split is that specialty trade capacity is now scarcer than the general contractor capacity built to house it, and it will reprice before the shell does. Firms cutting crews into soft demand will not be the ones able to staff a data center award when one lands, which suggests the have-nots are shrinking out of the market rather than waiting for it. For anyone underwriting a delivery date, contractor labor belongs in the schedule risk line, not the contingency.

Watch the staffing number in the next reading. If the share of contractors planning cuts keeps rising while data center awards keep spreading across the survey, the two halves of this market are separating for good, and the contractors holding the 9.9-month books will be the only counterparties left to negotiate with.