WIP Schedules in Construction: The Report the Bonding Agent Actually Reads

Updated for 2026, The WIP discipline holds, and sureties are now asking about data hygiene and AI usage on the cost-coding pipeline that feeds the schedule. Pair this guide with construction AI pilots and Procore data hygiene before the next renewal underwriting conversation. What the bonding agent is actually reading When a surety underwriter sits down with a construction firm's quarterly package, the work-in-process schedule is the first document they pull. The financial statements are read second. The personal financial statements of the principals are read third. The schedule of completed contracts is read fourth. The WIP is the lead document because it is the only one that tells the underwriter what the firm's financial picture looks like in motion, what is being built, what has been billed, what has been paid, what gross margin each job is producing, and whether those margins are stable or fading. The construction CFOs we audit almost universally treat the WIP as an internal management report. They prepare it monthly because the controller has always prepared it monthly, they review it with project managers because the project managers find it useful, and they send it to the bonding agent because the bonding agent asks for it. What they rarely do, and what separates the firms whose bonding capacity grows steadily from the firms whose capacity has stalled at a number that does not move, is prepare the WIP with the underwriter's read in mind. The two readings ask different questions of the same document, and the document that answers only the internal question is structurally weak as an underwriting artifact. The bonding agent is reading the WIP for five things. Gross-margin stability across the portfolio, which signals estimating discipline and project-management consistency. Estimated-cost-to-complete movement on legacy jobs, which signals whether the project managers are being honest with themselves about where each job is actually heading. The over-billing and under-billing trend, which signals working-capital pressure and the firm's billing discipline. Job concentration, which signals whether one or two contracts are carrying the firm's results. Fade, the difference between the gross margin a job started with and the gross margin it finished with, which signals everything else. The five signals are read together, and the underwriter is forming a single narrative about whether the firm's reported financial results reflect the reality of the work in progress, or whether the WIP is going to surprise them at the next year-end. When the surety bond capacity does not grow, the cause is almost never that the firm's financials are weak. The cause is that the WIP, read by an underwriter, is producing one or more of the five signals at a level that constrains the underwriter's confidence. The CFO whose firm is at $40M in single-job capacity for the third year running, who cannot understand why the surety will not extend to $55M, has frequently never asked the bonding agent to walk through what they read in the WIP. We have run that conversation as third-party advisors on behalf of construction firms; the answers are concrete and the remediation is clear, and the bonding capacity routinely moves in the next renewal cycle once the WIP discipline catches up to the underwriter's expectations. The rest of this guide describes the WIP structure that survives bonding-side review, the monthly preparation discipline that produces a clean WIP, the patterns the bonding agent reads as warning signs, and the connection between WIP discipline and the broader construction back-office that we treat in our job cost discipline guide and ASC 606 for construction guide. The WIP structure The WIP schedule is a row-per-job, column-per-data-element table that captures the financial state of every active contract as of the period-end date. The structure has been broadly stable for forty years, with refinements driven by ASC 606 adoption and the increasing sophistication of bonding-side analytics, but the columns are recognizable across every WIP we have audited from a fifteen-million-dollar specialty contractor to a six-hundred-million-dollar general contractor. A clean WIP includes, at minimum, the following columns for every active job. The contract identifier and customer name, with the project name and the contract type (lump-sum, cost-plus with GMP, cost-plus without GMP, T&M, design-build) noted. The original contract value and the current contract value, with the difference reconciled through the change-order log; the difference between original and current is the cumulative approved-change-order amount, and any unapproved change orders are tracked separately and not rolled into the contract value until approved. The estimated final cost, which is the project manager's current best estimate of total cost to complete the job, including costs incurred to date plus the estimated cost to complete; the discipline around the estimate-to-complete column is the most important discipline in the entire WIP, and we treat it in detail later in this guide. The costs incurred to date, pulled directly from the job-cost ledger and tied to the GL job-cost balance, which is the input to the percentage-of-completion calculation under the cost-to-cost input method. The percentage of completion, calculated as costs incurred to date divided by estimated final cost, expressed as a percentage. The earned revenue, calculated as percentage of completion multiplied by current contract value, which is the revenue recognized inception-to-date under ASC 606's input-method PoC for construction contracts; we cover the ASC 606 application to construction in a separate guide that handles the variable-consideration and contract-modification mechanics in depth. The billings to date, pulled from the billing ledger and reconciled to the AIA G702/G703 progress-billing forms submitted to the owner, which represents the cumulative dollars invoiced to the customer through the period-end. The over-billings or under-billings amount, calculated as the difference between billings to date and earned revenue; over-billings (billings ahead of earned revenue) sit on the balance sheet as deferred revenue or contract liability, and under-billings (earned revenue ahead of billings) sit as a contract asset. The gross profit at completion, which is the current contract value minus the estimated final cost, the dollar gross profit the job is projected to earn when complete. The gross profit percentage at completion, which is gross profit at completion divided by current contract value, expressed as a percentage, this is the headline margin number the bonding agent watches. A bonding-grade WIP also includes columns for gross profit earned to date (PoC multiplied by gross profit at completion), gross profit remaining (gross profit at completion minus gross profit earned to date), start date and projected completion date, prior-period estimate-to-complete versus current-period estimate-to-complete to show whether the project manager has been adjusting the estimate, and prior-period gross profit at completion versus current-period gross profit at completion to show fade explicitly. The fade columns are what separates a tracking WIP from a bonding-grade WIP, and most internally produced WIPs we audit do not have them. The WIP is run on every active contract. A contract is active from the date it is signed and a job is opened in the job-cost ledger, through the date it reaches substantial completion and is closed. Jobs in warranty or with retainage outstanding stay on the WIP until retainage is fully released; jobs awaiting final payment but otherwise complete are noted as such. The completed-contracts schedule, the historical log of all closed jobs with their final results, is a separate document that the bonding agent also reads, and it is populated by jobs that have rolled off the WIP at completion. Monthly preparation discipline The WIP that survives bonding-side review is produced monthly with a fixed sequence of named-owner steps, on a calendar that does not slip. The discipline is not difficult; it is exhaustively repeatable. The CFOs whose WIPs are weak almost always have a process that is partial, three of the five steps are firm, two are improvised, and the partial process is what produces the inconsistency the underwriter catches. 1. Job cost cutoff and tie to GL. As of period-end, the costs-incurred-to-date number for each job is locked from the job-cost ledger and reconciled to the GL job-cost balance. Any reconciling items, invoices in transit, GRNI accruals, equipment time not yet posted, are documented and addressed before the WIP is built. This step ties to the broader job-cost discipline in our job cost project controls guide; a WIP run on a job-cost ledger that has not been tied to GL is a WIP whose numbers cannot be defended to an auditor. 2. Estimate-to-complete refresh by project manager. Each project manager reviews their active jobs and produces a current estimate to complete. The discipline here is that the estimate is in writing, signed by the project manager, with a brief note explaining any change from the prior period's estimate. The signature matters because the bonding agent will sometimes ask whether the estimates are reviewed monthly by the people closest to the work, and the documentation answers the question concretely. 3. Controller review of every job with material movement. The controller reviews every job where the gross-profit-at-completion percentage has moved more than a defined threshold (typically 5 percent or 200 basis points) from the prior period, and every job where the estimate to complete has moved meaningfully. The review is a conversation with the project manager, documented in writing on the WIP itself or in a memo attached to the WIP. The conversation surfaces whether the movement reflects a genuine change in the job's economics or whether the estimate is drifting because the project manager is reluctant to write down the gross profit explicitly. 4. CFO sign-off and variance commentary. The CFO reviews the consolidated WIP, signs the cover page, and writes a short variance commentary that addresses any portfolio-level patterns, gross-margin compression across jobs of a particular type, over-billing growth at the portfolio level, fade emerging on a specific project manager's jobs. The variance commentary is the document that travels with the WIP to the bonding agent and is read first. 5. Distribution to bonding agent and surety. The WIP, the variance commentary, the schedule of completed contracts, and any other underwriting-relevant documents (the schedule of equipment, the schedule of related-party transactions) are distributed to the bonding agent on a fixed monthly cadence, typically by the tenth business day after period-end. The cadence is the discipline; bonding agents who receive a WIP every month, on time, in a consistent format, develop a different relationship with the firm than bonding agents who receive a WIP "when the controller gets to it." The five-step sequence is what produces a WIP that the bonding agent can read with confidence. The most common failure pattern we see is steps two and three being skipped, the project managers do not refresh their estimates, the controller does not review the material movements, and the WIP is run mechanically off the costs-incurred ledger with prior-period estimates rolling forward unchanged. The resulting WIP is technically accurate to the GL but underwriting-fragile because it shows no movement on jobs that the underwriter knows must be moving. We discuss the variance-commentary discipline more broadly in our 10-day close reference calendar; the construction-WIP variance commentary is a specialized application of the same principle. The underwriting read: what the bonding agent looks for The bonding agent's read of the WIP is not a financial-statement analysis. It is a forensic read for the five signals, gross-margin stability, estimate-to-complete movement, over- and under-billing trend, concentration, and fade, and the underwriter has seen enough WIPs in their career to recognize the patterns within minutes. The CFO who understands the underwriter's read can prepare a WIP that surfaces the strengths and addresses the concerns proactively, rather than producing a WIP that requires the underwriter to draw the unfavorable conclusion themselves. Gross-margin stability is the underwriter's first check. Across the portfolio of active jobs, the gross-profit-at-completion percentages should cluster around the firm's historical norm for the contract type and customer mix, with some natural variation but no extreme outliers. A WIP that shows the firm's typical job at 12 percent gross margin alongside a single job at 28 percent and another at 4 percent invites the underwriter to ask why. The 28-percent job may be a one-off that will not recur; the 4-percent job may be a fade that the project manager has not fully written down yet. The underwriter wants to see margins that look like the firm's track record, not margins that swing widely. When margins do swing, the variance commentary should explain why before the underwriter has to ask. Estimate-to-complete movement on legacy jobs is the underwriter's second check. A job that has been on the WIP for fourteen months, with the same estimate to complete in month seven and month fourteen, is a job whose project manager is not refreshing the estimate honestly. The underwriter will assume, usually correctly, that the cost-to-complete is being held flat to avoid acknowledging fade, and that the actual cost to complete will surface when the job finishes and the gross margin compresses. The underwriter is looking for declining estimated costs to complete on jobs in their final third. As a job moves from 60 percent complete to 95 percent complete, the cost to complete should be shrinking; if it is not shrinking, or is shrinking more slowly than the work is being completed, the underwriter reads the pattern as fade-in-progress. The over-billing and under-billing trend is the underwriter's third check. Over-billings, when billings exceed earned revenue, are normal and even healthy at the start of a job, when mobilization, materials procurement, and front-loaded billing structures naturally create a billings-ahead-of-cost pattern. Over-billings are a problem when they persist across the life of the job, grow as a portfolio, or are concentrated on jobs that are deep into completion. Persistent over-billings are interest-free working capital from the customer, but they are also a leading indicator of cash compression at job-end, when the billing pace slows below the cost-incurrence pace and the firm has to fund the remaining work from operations. Under-billings are the inverse problem: revenue is being recognized that has not been billed, and the cash is not arriving on the timing the work was performed. Under-billings are usually a sign of billing-process gaps, and chronic under-billings indicate the firm is financing the customer's work with the firm's cash. Either pattern, if persistent, signals a discipline gap that the bonding agent will probe. Job concentration is the underwriter's fourth check. The portfolio of active jobs should not have one or two contracts carrying disproportionate share of the firm's expected gross profit. A bonding-grade WIP shows the gross profit by job and the percentage of total portfolio gross profit each job represents; the underwriter is checking whether the concentration is acceptable for the firm's size and surety capacity. The single-largest-job rule of thumb varies by surety, but a job representing more than 20-25 percent of total active gross profit is typically a flag. Concentration is also read against the customer mix, if the largest job is for a marquee owner with a strong payment history, the underwriter is more comfortable; if the largest job is for a new customer with no track record, the underwriter is less comfortable. Fade is the underwriter's fifth and most important check. Fade is the difference between the gross-profit-at-completion percentage a job started with, the bid margin, and the gross-profit-at-completion percentage the job finished with. Some fade is normal; jobs encounter weather, scope ambiguity, productivity variances, and material-cost movement that compress margins from bid to actual. Persistent fade across jobs is the single strongest signal that the firm's estimating discipline is weak, and the underwriter reads fade-by-job as a tell about the firm's bid quality, the project managers' execution, and the controller's WIP discipline. A bonding-grade WIP includes a fade column, bid margin versus current projected margin, and the variance commentary addresses any job with material fade with a documented cause. The patterns we audit most often Across the construction firms we have engaged on WIP discipline, typically in the context of a bonding-capacity stall, a sponsor's diligence on a platform investment, or a surety-driven request for an outside review, three patterns recur often enough to deserve specific treatment. Each pattern is fixable; each pattern, left untreated, costs the firm bonding capacity, working capital, or both. The stale estimate to complete. The project manager closes their estimate at job inception and rolls it forward unchanged for the life of the job. Each month, costs incurred to date increases, the percentage of completion increases mechanically, and the estimate to complete decreases by the costs incurred, the math holds, but no judgment has been applied. When the job finishes, the actual cost is meaningfully different from the long-stale estimate, and the gross margin shows the difference all in one period. The bonding agent reads the pattern as a project-management discipline gap, and they are correct. The fix is the monthly project-manager-signed estimate refresh in step two of the preparation discipline above; the controller's review in step three catches the project managers whose estimates are not actually being refreshed even when they have been signed. Jobs that "always finish at 99 percent." A job sits at 99 percent complete on the WIP for three or four months. Costs trickle in, small punch-list items, retainage release work, warranty items the project manager is treating as part of the original job, but the percentage does not move because the estimate to complete is being adjusted upward to absorb the new costs. The job has actually finished; the WIP says it has not. The pattern hides fade because the closed-job comparison is never triggered, and it hides over-billings that should have been recognized as revenue. The fix is a closeout discipline: every job at 95 percent or above is reviewed monthly for closeout, and any job that has not closed within a defined window after substantial completion is escalated to the controller for explicit treatment. Over-billing as a leading indicator of cash compression. The firm's cash position looks healthy because over-billings are providing interest-free customer working capital. The CFO is comfortable. The bonding agent and an experienced controller are both reading the over-billing trend as a future cash problem, because the over-billings will unwind as the jobs reach completion, the billing pace slows below the cost pace, and the firm has to fund the closeout from operating cash that is no longer being supplemented by customer over-billings. We have audited construction firms that ran operating-cash crunches in November because the summer over-billings from a heavy backlog of new starts had unwound by Q4 and the firm did not see it coming. The fix is to model the over-billing unwind in the thirteen-week cash-flow forecast, so the controller sees the unwind months before it materializes and can plan the operating-cash position accordingly. A fourth pattern, less common but more dangerous, is the WIP that ties to GL but the GL does not tie to bank. The job-cost ledger reconciles to the GL, the GL reconciles to revenue and cost, but the cash position is being held up by delayed AP payments or unrecorded subcontractor liabilities. The WIP looks correct in isolation; the broader financial picture, when assembled, reveals that the gross profit being recognized has not actually been earned in cash terms. The audit-side and bonding-side review of the WIP in conjunction with the financial statements, which is how the underwriter actually reads the package, surfaces the disconnect. We treat the broader job-cost discipline that prevents this pattern in the job cost project controls guide. What we recommend Construction firms that grow into the upper-mid-market tier, somewhere between $50M and $300M in annual volume, with ten to forty active jobs at any given time and surety capacity that needs to grow alongside the firm, are the firms where WIP discipline produces the largest return. Below that band, the WIP is still important, but the firm has fewer jobs, simpler concentration profiles, and a closer working relationship with the bonding agent. Above that band, the firm has typically professionalized the WIP discipline as part of a broader CFO build-out. The middle band is where the WIP is most often weak relative to the firm's underwriting profile, and where a structured review produces the biggest result. We recommend three concrete actions for any construction CFO who wants to evaluate whether the firm's WIP is doing its job as an underwriting artifact. Run a fade analysis on the prior twelve months of completed jobs. For every job that closed in the last year, compare the bid gross-profit percentage to the actual gross-profit percentage at closeout. Calculate the average fade. A firm whose average fade is one-to-two percentage points has an estimating-and-execution discipline that the underwriter will read favorably. A firm whose average fade is four-to-six points has a discipline gap that is constraining bonding capacity and is best addressed before the next surety renewal. A firm whose average fade is above six points, or whose fade pattern is concentrated on specific project managers, contract types, or customer segments, has a structural issue that the WIP will keep surfacing until it is addressed. Add the bonding-grade columns to the next monthly WIP. Bid margin, current projected margin, prior-period estimate to complete, current estimate to complete, prior-period gross profit at completion, current gross profit at completion. The columns are produced from data the firm already has; the discipline is to surface them on the face of the WIP rather than burying them in the supporting workpapers. The first WIP with the new columns will surface jobs whose estimates have not been refreshed in months; the second WIP will surface project managers whose estimates routinely require controller-level adjustment. Schedule a thirty-minute conversation with the bonding agent about what they are reading in the current WIP. The conversation costs nothing and surfaces the underwriting concerns the agent has already formed but may not have articulated. We have run this conversation as a third-party advisor on behalf of CFOs, and the answers consistently translate into a remediation plan that takes one-to-two surety-renewal cycles to fully execute. The conversation also strengthens the firm's relationship with the agent, which becomes valuable when the firm needs the agent's advocacy on a specific bond approval or a capacity increase. The Construction WIP Schedule Template paired with this guide includes the bonding-grade column structure, the project-manager estimate-refresh worksheet, the controller-review checklist, the variance-commentary framework, and the schedule-of-completed-contracts companion sheet. It is the reference WIP we install when we engage with construction firms on the Build-Construction-Back-Office Diagnostic, and it is paired with the ASC 606 construction percentage-completion guide and the change order management documentation guide to address the broader documentation set the bonding agent and the auditor read together. The construction firms whose bonding capacity grows steadily are not the firms with the deepest balance sheets or the longest track records. They are the firms whose WIP discipline produces a document the underwriter can read with confidence, month after month, in a consistent format, with the gross-margin stability, the estimate-to-complete movement, the billing trend, the concentration profile, and the fade story all surfacing on the face of the document rather than requiring the underwriter to dig for them. The discipline is not expensive. It is exhaustively repeatable, it pays off in surety capacity within two-to-four renewal cycles, and it produces a controller's monthly close that is materially calmer because the WIP is no longer the source of year-end surprises.