HOW TO READ BACKLOG RISK AS A SUBCONTRACTOR — FOUR FACTORS THAT MATTER.
A $3M backlog feels like a win. Whether it is depends on four factors most contractors never measure: whether the working capital exists to fund the mobilizations, whether the backlog is dangerously concentrated in one GC relationship, whether the work was bid at margins that cover real overhead, and whether the schedule assumptions behind the revenue forecast are realistic. Miss any one of those and the backlog is not the safety net it looks like.
SPM builds backlog analysis into the 24-month cash flow forecast — so signed contracts are visible as monthly revenue projections with schedule risk modeled, not as a single total that looks reassuring in isolation.
WHAT MAKES A BACKLOG RISKY — FOUR FACTORS MOST CONTRACTORS NEVER MEASURE.
Working Capital Required to Fund the Backlog
A $3M backlog sounds like good news. Whether it is depends on whether the working capital exists to fund the mobilizations. If the backlog requires $400,000 in mobilization cash across four projects starting in the next 60 days, and available LOC plus cash is $280,000, the backlog is not an asset — it is a liability. Signing contracts you cannot fund produces cash crises on profitable work. The working capital analysis should happen before each new contract is signed, not after mobilization reveals the gap.
Concentration in a Single GC or Project Type
A $3M backlog that is 80% one GC is a concentration risk. If that GC slows payments, disputes a change order, or has their own cash problems, 80% of the backlog is impacted simultaneously. A diversified backlog across four or five GC relationships and multiple project types is structurally more stable than a concentrated one — even at the same total dollar value. Track backlog by GC relationship and flag concentration above 40% with any single customer.
Margin Quality of the Backlog
Not all backlog is equal. A $3M backlog at 18% gross margin produces a materially different business outcome than a $3M backlog at 9% gross margin. The low-margin backlog generates roughly $270,000 less in gross profit. If overhead is $350,000, the low-margin backlog does not cover it. Backlog analysis requires not just dollar volume but weighted average gross margin across the backlog. Work that was bid at incorrect overhead rates, or that contains scope that has already expanded without change orders, is margin-impaired even if the contract value looks solid.
Schedule Risk and Milestone-Dependent Revenue
Backlog that is tied to inspection milestones, permit issuance, or other trades completing work before your crew can mobilize is schedule-dependent revenue. If the inspection slips, the billing slips. If the permit is delayed, the mobilization is delayed. A 13-week cash forecast built on backlog that has optimistic schedule assumptions will misstate cash by the delta between expected and actual start dates. Model schedule risk explicitly — assign a probability to each project start date rather than assuming all projects start when the contract says they will.
A BACKLOG HEALTH CHECK — FOUR QUESTIONS THAT TAKE 20 MINUTES.
The 24-month cash forecast: The CFOS 24-month cash flow forecast overlays projected project revenue by month against overhead — so backlog revenue is visible as monthly cash inflows rather than a single total. Backlog risk shows up as revenue gaps, concentration peaks, and schedule-dependent revenue windows that need LOC coverage.
FREQUENTLY ASKED.
