Backlog isn’t a pile of future cash. It’s a pile of promises that all want payroll, material, supervision, and somebody else’s confidence before they turn into cash.
You can be awarded more work, post higher billings, and still find that the next bond request, line draw, or equipment payment is where growth stops.
The missing view is a capacity bridge. It puts every awarded and likely job on the same peak-cash schedule, then asks whether you have enough surety support, available credit, collateral, and management attention to carry the worst week. Annual revenue doesn’t answer that question. Neither does a bond certificate. Both are very impressive pieces of paper right up until Friday.
The Constraint
Bonding turns your balance-sheet strength into permission to take work. Sureties assess capital, capacity, and character, and weak working capital, losses on unfinished jobs, excessive aggregate backlog, and work outside your experience can each restrict the next bond. Bonding capacity is the contract size and aggregate workload a surety will support. It isn’t a statement that you have funded the job.
That distinction is literal on U.S. federal construction. Above $150,000, performance and payment bonds are generally required, and from more than $35,000 through $150,000 the contracting officer selects at least two alternative payment protections. Above the larger threshold, each prescribed bond is ordinarily 100% of the original contract price unless a supported finding permits less. The bond protects completion and covered payment claims. It doesn’t write a payroll cheque.
The SBA surety-bond program makes the split clearer, not softer. It charges the small business a 0.6% guarantee fee for performance and payment bond guarantees, on top of any surety premium, while bid-bond guarantees carry no SBA fee. The program covers eligible non-federal contracts up to $9 million and federal contracts up to $14 million. Those are program limits, not a working-capital grant or a promise that your next draw clears.
The Cash Bridge
For each job you hold, build the bridge from commitments to cash, not from contract value to optimism. Peak working capital is the largest projected excess of project cash outflows over collected inflows. It’s the number that matters when concurrent mobilizations land in the same month.
| Job bridge item | What to record | What it changes |
|---|---|---|
| Bonded backlog | Contract value, bond requirement, and surety support consumed | Whether the next award can be bonded at all |
| Peak float | Highest excess of payroll, materials, subs, rentals, and other outflows over collections | The week operating cash is most exposed |
| Line availability | Undrawn capacity, borrowing-base limits, expiry, covenant status, and lender discretion | Whether a bridge is actually drawable rather than theoretical |
| Collateral | Eligible receivables, inventory, equipment, lien priority, reserves, and concentration | The portion of reported assets that can support liquidity |
| Debt payment | Scheduled principal and interest by payment date | Whether a new facility drains the same week it was meant to protect |
| Retainage and changes | Retainage by expected release date; signed price, probable recovery, committed cost, and collected cash for changes | Cash tied up after work is performed |
| Management capacity | Superintendent, project-management, billing, and closeout load | Whether the entitlement records keep pace with production |
That table has to be job-specific before you aggregate it. Customer retainage doesn’t necessarily finance subcontractor holdback, because the dollars and the release dates rarely match. Underbillings are an interest-free advance from you to the project. Overbillings supply cash but stay an obligation to perform. Don’t net either one into “healthy backlog.”
Retainage deserves its own release schedule in your file. On federal fixed-price work, retainage is a case-by-case response to unsatisfactory progress and may not exceed 10% of the affected progress payment. FAR 32.103 says it shouldn’t substitute for contract management and shouldn’t be withheld without cause. Private retainage can be a different number on a different clock. Federal language isn’t a travelling coupon code.
The Payment Gates
Work you performed isn’t automatically a collectible receivable.
Under FAR 52.232-5, a proper federal progress-payment request itemizes contract work, identifies subcontractor amounts, and carries the required certification. Your schedule of values is a control document, not invoice wallpaper.
Under FAR 52.232-27, a qualifying federal construction progress payment is generally due 14 calendar days after the designated billing office receives a proper request, and an improper invoice has to be returned with reasons within 7 days.
A prime then flows down payment for satisfactory subcontractor performance no later than 7 days after receiving the corresponding Government funds, with interest for late payment. So a job can have work installed, subs paid, and cash still waiting on the gate that starts with a proper request.
Your changes carry a separate gate. FAR 52.243-4 generally excludes many constructive-change costs incurred more than 20 days before the required notice, and requires the adjustment claim within 30 days unless extended.
Your job report needs separate fields for signed price, probable recovery, committed cost, and collected cash. Collapse those into a single “change-order revenue” line and your crew is financing somebody else’s decision process while the report calls it margin.
Start With What Moved
Start with the number that moved on you. Each symptom points at a different broken stage.
Awards rise, but the surety narrows the next bond request → aggregate capacity is broken
The work-in-progress schedule may show too much unfinished backlog, weak working capital, losses on active jobs, or work beyond demonstrated experience. Rebuild the bridge by job and find which award eats your capacity without supplying cash.
Bond support is available, but the line is near its limit → liquidity is broken
A bond protects defined obligees against defined defaults. It doesn’t fund float. Separate the bond requirement from the weekly excess of job outflows over collected inflows.
The line exists, but the draw is smaller than the ledger suggests → collateral availability is broken
Asset-based lenders commonly advance 70%–85% against eligible receivables and up to 65% of eligible inventory book value. Past-due, concentrated, unbilled, affiliate, contra, foreign, or disputed accounts can be excluded before the advance rate even applies.
Cash tightens after an equipment purchase → repayment timing is broken
A loan’s rate says little about the cash available after closing fees, or about the dates of principal and interest. Compare net proceeds, payment timing, total required dollars, maintenance or return obligations, and retained residual-value risk.
The machine may be fine. The calendar may be the assassin.
A job looks profitable, but each new draw needs more borrowing → float and retainage are broken
Track owner retainage by expected release date, subcontractor payments, underbilling, and weekly collections separately. A billed dollar isn’t a cleared dollar, and a retained dollar isn’t available cash.
Margin survives in the report while cash disappears on changed work → entitlement is broken
Check authority, written notice, signed modification, committed cost, and collection date. Production records can’t replace the notice that preserves an equitable adjustment.
You can finance one new job but not several concurrent starts → the aggregation is broken
Test backlog at combined peak working-capital use. Individually profitable awards can consume cash, credit, bond support, and management capacity in the same week.
The Finance Test
Don’t choose the facility by the advertised rate.
A term loan is paid from a declining principal balance. A line sells both drawn money and the right to draw later, so commitment, annual, unused-line, draw, and renewal fees can matter even at low utilization. Fees deducted at funding shrink net proceeds while scheduled debt service still hits the cash schedule at its full contractual amount.
Match the instrument to the interval you actually need funded. Equipment credit or a lease considers useful life, resale channel, installation, obsolescence, and residual value. A revolving line fits recurring receivable or inventory cycles.
Factoring can advance cash against eligible invoices, but you have to compare its reserve and charges with the collection interval. A merchant cash advance can be repaid from a percentage of receipts or fixed daily withdrawals. A 1.3 factor means $130,000 is purchased for a $100,000 advance. It doesn’t mean 30% annual interest.
Collateral and guarantees belong below your operating case. The OCC notes that receivable dilution — returns, allowances, disputes, bad debts, and offsets — is usually expected to stay at 5% or less, though industry conditions govern. That’s why an invoice aging and a borrowing-base certificate matter more than a cheerful accounts-receivable total.
FDIC guidance identifies business cash flow as the primary repayment source and collateral or guarantor support as secondary. A personal guarantee adds recourse. It doesn’t make Friday liquid.
Monday
Put each awarded and likely job into one weekly schedule.
Show the bond requirement first, then peak float, line availability, collateral availability, debt service, retainage release, unsigned change exposure, and the named management owner. Use expected clearing dates, not invoice dates, for collections. Keep bond support separate from debt capacity, and both separate from available cash.
Then test your worst combined week, not the average month.
If the bridge only works after an unscheduled line draw, an unsigned change, or retainage with no release date, it doesn’t work. It’s waiting for a story to come true.
Bonding capacity lets you accept the obligation. Working capital lets you survive performing it.
Model your backlog at the cash peak. Fund the dates before you celebrate the awards.