FHWA treats the spread between the low bid and the engineer's estimate as a formal review trigger on federally funded highway work, and generally considers competition strong when six or more bids land within 20% of the low bid. A wide spread between the low and second bidder can flag a busted bid — a real pricing mistake — just as easily as it can flag a genuinely lower-cost contractor, which is why many owners reserve the right to question, or even reject, a bid that comes in unusually far below the rest of the field. For a contractor building pricing strategy, looking at bid spreads on comparable past projects is one of the more reliable ways to calibrate a number without guessing. Historical bid tabs are the raw material for this kind of analysis, but reading them at scale — how a given contractor, or a market as a whole, has typically spread against the engineer's estimate on comparable scopes — is exactly the kind of pattern Nonlinear is built to surface from public bid records, so a pricing or go/no-go decision is grounded in real market data instead of a hunch.
Knowledge Base
What is the bid spread?
The bid spread is the gap — usually expressed as a percentage — between the low bid and either the next-lowest bid or the engineer's estimate, and it's one of the simplest signals of how competitive, or how mispriced, a bid actually was.
