Your WIP report is already on the underwriter's desk. Renewal season has started. Somewhere a surety underwriter is reading the work-in-progress schedule you sent, deciding whether to hold your bonding capacity, raise it, or quietly trim it. Almost everything written about what surety underwriters look for in a WIP report is written from the underwriter's seat, the carrier's seat, or the CPA's seat. Here is what we check. This post takes the contractor's seat instead.
There are five WIP patterns that show up on the underwriter's screen as red flags, and each one costs you capacity in a specific way. Below, each flag gets the same treatment: what the underwriter sees, why it cuts your capacity, and the high-level fix to make before the renewal meeting. For the four-question read behind all of it, we lean on a post you may already have read. The rest is new.
What does a surety underwriter actually do with your WIP report?
A surety underwriter uses your WIP report to answer four questions: are your jobs profitable, are you billing accurately, are you overextended, and are your cost estimates reliable? Any pattern in the schedule that breaks one of those four answers becomes a flag. The underwriter reads profitability off the margin column, billing accuracy off the over/under-billing position, exposure off the cost-to-complete backlog, and estimate reliability off how the cost-to-complete moves from one period to the next (Projul).
In 2026, surety underwriters want that read on interim, job-level WIP, not just on year-end financials. Turner Surety & Insurance Brokerage (TSIB), in its 2026 Surety & Construction Forecast, flags increased focus on "interim reporting and job-level transparency (not just year-end and interim financials)" along with closer attention to "cash flow, underbilling trends, and reliance on key employees" (TSIB, 2026 Surety & Construction Forecast). We have walked the four questions a surety underwriter answers off your WIP schedule in full elsewhere; this post is about the five places your WIP gives the wrong answer.
What are the 5 WIP red flags that cut your bonding capacity?
The five WIP patterns most likely to cut a contractor's bonding capacity are stale cost-to-complete estimates, missing PM attribution, unexplained gain-fade, a WIP-to-GL reconciliation gap, and over/underbilling outliers. Each one breaks one of the underwriter's four questions, and each one is fixable before the file goes out. Here they are in the order an underwriter tends to catch them:
- Stale cost-to-complete — the estimate to complete (ETC) has not been updated since the prior quarter.
- Missing or unattributed PM sign-offs — no name or date behind the cost-to-complete number.
- Gain-fade spikes with no written explanation — margin erodes and nothing on the row says why.
- WIP-to-GL reconciliation gap — the WIP totals do not tie to the balance sheet and income statement.
- Over- and underbilling outliers — excessive overbilling, or late-stage underbilling on a losing job.
Red flag 1 — Stale cost-to-complete estimates: what the underwriter sees and why it matters
A stale cost-to-complete tells the underwriter that the field has not looked at the job recently, and a number nobody has revisited is a number nobody trusts. The cost-to-complete column, the estimated cost to complete (or ETC), is supposed to be the contractor's live read on how much more it will cost to finish each open job. When that figure is identical to last quarter's on an active project, the underwriter assumes either the job is genuinely frozen or, more likely, the estimate is being carried forward out of habit.
Why it cuts your capacity
The estimate-reliability question fails. Worse is the related pattern: a cost-to-complete that keeps creeping up period after period. "If your estimated costs to complete keeps climbing on the same project, your original estimate was wrong and you are chasing the number" (Projul), and the underwriter reads that across consecutive WIP periods. In 2026 that costs more than it used to. TSIB flags "less patience for repeated one-time explanations in WIP schedules." A stale ETC is exactly the kind of line that forces the underwriter to pick up the phone for a verbal update, and that is the patience that is no longer there.
How to fix it before renewal
Refresh every open job's cost-to-complete in the same cycle you build the WIP, so no figure is older than the period you are reporting. For the step-by-step diagnostic (how to actually run the freshness check and what pass/fail looks like), see the companion walkthrough on how to read your WIP report like a surety underwriter.
Red flag 2 — Missing PM attribution on cost-to-complete: what it signals
A cost-to-complete with no name and no date behind it reads to the underwriter as a finance-desk estimate, not a field estimate. And the underwriter wants the field estimate. The ETC column represents judgment about what it will actually cost to finish the work, and that judgment lives with the project manager running the job, not the controller assembling the report. When the number is carried forward with no attribution, there is no evidence the person closest to the job ever looked at it.
Why it cuts your capacity
The 2026 underwriter is reading for exactly this. TSIB's forecast points to closer scrutiny of cost estimates, and an unattributed ETC looks like a number the field has not touched. The discipline behind a good estimate is simple and well-known in the trade: if your PM knows about a cost overrun, it needs to be in the cost-to-complete immediately. An attributed, dated ETC is the proof that it is.
How to fix it before renewal
Put a name and a date on every cost-to-complete figure, so each one shows which PM provided it and when. A WIP where every ETC carries attribution answers the estimate-reliability question before the underwriter has to ask it.
Red flag 3 — Unexplained gain-fade spikes: why the underwriter discounts your whole portfolio
Profit fade is one of the patterns an underwriter weights most heavily, because an unexplained fade does not stay contained to one job. When a project's margin erodes between WIP submissions with no note explaining why, the underwriter stops trusting the projected margins on every job in the portfolio. The doubt spreads past the one job that faded. "Underbillings can signal deeper financial challenges, particularly when they contribute to profit fades. Profit fades occur when the actual costs of a project exceed initial estimates, eroding profitability" (Mahki Abner, Old Republic Surety, NASBP Pipeline, June 24, 2025).
Why it cuts your capacity
Capacity is set on the strength of your projected results, and projected margin is one of the biggest inputs. If margin consistently shrinks from one WIP to the next, the underwriter discounts the margin you are forecasting across the whole book and may reduce capacity accordingly. The way fade trends roll up into the capacity number is its own subject; see how fade trends affect your bonding capacity number for that mechanism.
How to fix it before renewal
You do not fix this flag by fixing the fade. You fix it by explaining the fade in the WIP itself. An unexplained fade reads as concealment; a fade with a one-line written note on the row ("scope change, approved change order pending") reads as control. Disclose the cause where the underwriter will see it, on the row, before they have to go looking.
Red flag 4 — WIP-to-GL reconciliation gap: the flag that makes the underwriter distrust both documents
When your WIP does not reconcile with your financial statements, the underwriter stops trusting both documents at once. The WIP is supposed to tie to the general ledger. Its total underbillings and overbillings should match the contract assets and contract liabilities on the balance sheet, and its earned revenue should agree with the income statement. When the totals do not match, the surety has to figure out which document is wrong, and in a hardening market they may not give you the benefit of the doubt. The WIP must reconcile with the financial statements; when it does not, the underwriter ends up questioning the accuracy of both documents (Grit Insurance).
Why it cuts your capacity
The cost of this flag is not the dollars in the gap. It is the doubt the gap casts on every other number in the package. Once two source documents disagree, the underwriter can no longer take any single figure at face value, so they set capacity off the more pessimistic reading and hold it there until you explain the difference. A gap you catch and footnote yourself is housekeeping; the same gap found by the underwriter is a credibility problem that colors the rest of the review.
How to fix it before renewal
Run the WIP-to-GL reconciliation and close any gap before the file goes out. Never let the surety be the one to find it. For the mechanics of the reconciliation and what a clean tie-out looks like, see the companion walkthrough below on how to read your WIP report like a surety underwriter.
Red flag 5 — Over- and underbilling outliers: how they inflate and distort your working capital
Over- and underbilling outliers are two distinct patterns the underwriter reads off the same column, and both distort the working-capital figure that sets your limit. Under percentage-of-completion accounting (ASC 606), every open job is either overbilled (billed ahead of work earned) or underbilled (work earned ahead of billings). Outliers in either direction are a flag. Excessive overbilling, billing well ahead of completed work, reads as using project funds to finance operations, a working-capital warning. Late-stage underbilling reads as deferred loss recognition: work performed but not billed, parked in current assets where it inflates liquidity that may never convert to cash.
Why it cuts your capacity
The underbilling case is where the cost is most concrete, and a surety has documented it. "In a recent analysis by Old Republic Surety, underbillings inflated one contractor's working capital by nearly $3 million" (Mahki Abner, Old Republic Surety, NASBP Pipeline, June 24, 2025). In the same analysis, one job was 97% complete at year-end carrying $296,000 in underbillings; six months later, at 99% complete and still running at a loss, the underbillings had grown to $419,000 — and "this trend indicated a low likelihood of collection, leading to the disallowance of these amounts from the contractor's WC calculation" (NASBP). The contractor's adjusted working capital, the figure the surety actually uses, dropped by the disallowed amount. As one surety agency's checklist puts it, underbillings from unapproved change orders or profit fade are 100% excluded from working capital (Fedeli Group). Because adjusted working capital drives your limit through a multiple, a disallowance does not cost you the underbilled dollars once. It costs you a multiple of them in capacity. See how underbilling distorts adjusted working capital for the full treatment.
How to fix it before renewal
Flag your overbilling and underbilling outliers yourself, and clear or explain the late-stage underbillings on any job that is near complete or running at a loss before the surety gets the file. For the underbilling aging check that surfaces these outliers, see the companion walkthrough below on how to read your WIP report like a surety underwriter.
How do you audit your WIP for all five red flags before the renewal meeting?
Run all five checks on your WIP before it goes to the surety: confirm every cost-to-complete is current and attributed, that any fade is explained on the row, that the WIP ties to the GL, and that your billing outliers are flagged and cleared. That is the audit in one sentence.
For the step-by-step diagnostic process (how to actually run each check, what pass and fail look like, and the exact order to run them in), see How to Read Your WIP Report Like a Surety Underwriter. This post names the flags; that one teaches the audit.
What does a clean WIP signal to a 2026 surety underwriter?
Every one of the five flags above is fixable before the renewal file leaves your office. A WIP with no stale cost-to-completes, a name and date on every ETC, a written explanation for any fade, a clean GL reconciliation, and self-flagged billing outliers is a WIP that answers the underwriter's four questions without a single phone call. That is the difference between a file that survives the review and a file that earns from it.
It matters more in 2026 than it did a year ago. TSIB's forecast flags "less patience for repeated one-time explanations in WIP schedules" as a marker of the surety market's shift toward selectivity. That shift is now reaching the underwriting desk itself, with one industry survey reporting that 54% of underwriters use AI-driven models to evaluate applicant risk (IA Magazine, December 2025). A schedule that needs caveats to read costs you with a human underwriter and a model alike. A clean, self-explanatory WIP is the one that protects your capacity, and grows it. For the full picture of what the 2026 surety market means for how often your WIP needs to be current, we have covered the market context separately.
Frequently asked questions
What do surety underwriters look for in a WIP report? Surety underwriters use the WIP report to answer four questions: are your jobs profitable, are you billing accurately, are you overextended, and are your cost estimates reliable? They read these off the WIP's margin column, over/under-billing position, cost-to-complete backlog, and the cost-to-complete trend across consecutive periods. In 2026, underwriters want this read on interim, job-level WIP — not just year-end financials (TSIB, 2026 Surety & Construction Forecast).
What are the biggest red flags in a WIP report for bonding? The five WIP patterns most likely to cut a contractor's bonding capacity are: (1) stale cost-to-complete estimates — ETC not updated since the prior quarter; (2) missing PM attribution — no sign-off on who provided the estimate; (3) unexplained gain-fade spikes — margin erosion with no written explanation on the WIP row; (4) a WIP-to-GL reconciliation gap — WIP totals that do not tie to the balance sheet; and (5) over/underbilling outliers — particularly late-stage underbillings on jobs running at a loss.
How do underbillings affect bonding capacity? Underbillings — costs and earned profit in excess of billings — sit in current assets and inflate raw working capital, which is the primary number a surety uses to set bonding limits. If a surety doubts those underbillings will be collected, it disallows them from the working-capital calculation. In one analysis by Old Republic Surety, underbillings inflated a contractor's working capital by nearly $3 million — an overstatement that would have supported a bonding program the contractor did not actually qualify for (Mahki Abner, Old Republic Surety, NASBP Pipeline, June 24, 2025).
Why does profit fade in a WIP report concern a surety underwriter? Profit fade — when actual project costs exceed initial estimates and erode margin — signals two problems at once: the cost estimating is unreliable, and future cost-to-complete figures may be optimistic. Underwriters track jobs period to period; if margin consistently shrinks between WIP submissions, the underwriter discounts the projected margins on the entire portfolio and may reduce bonding capacity. An unexplained fade is worse than a disclosed one — a written note on the WIP row (scope change, approved change order pending) shows control rather than concealment (NASBP).
What is a WIP-to-GL reconciliation and why do sureties care about it? A WIP-to-GL reconciliation compares the totals on the work-in-progress schedule to the corresponding lines on the balance sheet and income statement. If the WIP shows total underbillings of $800,000 but the balance sheet shows $600,000 in contract assets, the $200,000 gap means either the WIP or the GL is wrong — and the surety cannot tell which. A reconciliation gap forces the underwriter to question both documents and can result in a conservative capacity adjustment until the discrepancy is explained (Grit Insurance).
How often should a contractor update the WIP report for surety purposes? Quarterly at minimum, monthly ideally — and proactively, even when the surety has not asked. A year-end-only WIP means the underwriter makes capacity decisions for twelve months off a single data point. In 2026, TSIB's annual forecast flags that underwriters are placing more focus on interim, job-level transparency, not just year-end financials. A WIP submitted monthly demonstrates financial control and builds the underwriter's confidence, which translates into higher bonding limits and faster approvals (Grit Insurance; TSIB, 2026 Surety & Construction Forecast).
How WIP Ready helps
Four of these five flags come from the same root: a cost-to-complete that is stale, anonymous, or quietly chasing a number nobody wrote down. WIP Ready closes that gap by collecting each PM's estimate to complete on their phone, with a name, a timestamp, and a note attached to every figure. The ETC in your schedule is attributed and current by the time you build the WIP, not chased over email after the fact. The schedule itself stays tied to your Procore cost data, so every figure traces back to a Procore field or a timestamped submission, which keeps the WIP-to-GL story honest. It is a reporting layer over Procore, read-only: it does not replace your accounting system or calculate the ETC for you; the PM still owns that number. If your next renewal file is the reason you are reading this, that is the part worth a look: wipready.com.
