A contractor can report profit and still struggle to fund payroll, materials, subcontractors, retainage, tax, and equipment.
The gap comes from timing. Costs often arrive before progress billings clear. Change work may be performed before approval. Retainage may remain unavailable long after the related cost is paid.
A weekly forecast makes that timing visible.
Download the free 13-week cash-flow workbook and use this guide to adapt it to project work.
Begin With Reconciled Cash
Start with unrestricted cash available for operations.
Account for outstanding checks and scheduled automatic payments once. Exclude restricted funds unless their intended use is allowed. Confirm line-of-credit availability separately rather than treating undrawn credit as cash.
The starting balance should agree to the bank and the books.
Forecast Collections by Job
Large expected receipts should be listed by customer, project, invoice, and expected clearing week.
Review:
- approved billing amount;
- billing submission date;
- contractual due date;
- customer payment history;
- conditional approval steps;
- retainage;
- disputed amounts;
- pending change orders;
- lien-waiver or documentation requirements;
- expected ACH or check-clearing timing.
Do not place every invoice in the forecast based only on stated payment terms. Use the best current information from the person responsible for collection.
Separate a committed receipt from an optimistic receipt.
Map Direct Project Payments
Forecast materials, subcontractors, rentals, equipment, permits, travel, and other direct costs by payment week.
Use purchase orders, subcontract schedules, AP aging, and project-manager input. Capture costs that have been committed but not invoiced.
For each major payment, note:
- amount;
- job;
- vendor;
- due date;
- whether timing is fixed;
- operational consequence of delay;
- who can approve a timing change.
The forecast is a decision tool, not a list of bills to defer.
Build Payroll From the Work Plan
Payroll is often the most immediate construction cash requirement.
Forecast:
- regular and overtime hours;
- payroll taxes;
- benefits and union obligations;
- workers' compensation timing;
- bonuses or commissions;
- planned hiring or reduction;
- subcontract labor separately.
Connect expected labor to the job schedule. If the forecast assumes a project starts next week, the labor and material requirements should appear even if the first billing will not.
Include Non-Job Cash Requirements
Add:
- rent and occupancy;
- insurance;
- debt principal and interest;
- income, payroll, sales/use, and property taxes;
- software and professional fees;
- fleet and equipment payments;
- capital purchases;
- owner draws or distributions;
- warranty and rework costs;
- annual and quarterly payments.
Loan principal and owner distributions may not appear as expenses on the income statement, but they still reduce cash.
Treat Overbillings and Retainage Carefully
Overbilled cash supports working capital only until the remaining work consumes it. It should not be confused with earned profit.
Retainage is not available until collected. Forecast its expected receipt separately and challenge assumptions that extend beyond the closeout process.
Pair the cash forecast with the construction WIP schedule. A job with margin fade, growing underbilling, or unresolved changes may need a more conservative collection assumption.
Add a Minimum Cash Target
Zero is not a sufficient reserve.
Set a minimum based on:
- payroll;
- vendor and subcontract commitments;
- debt and tax obligations;
- customer concentration;
- seasonality;
- project risk;
- normal forecast error;
- access to an approved line of credit.
The target should have a rationale, owner, and review date.
Run Base and Downside Cases
In the downside case:
- delay uncertain receipts;
- reduce expected collections;
- move critical costs earlier;
- include a project delay or rework event;
- model a lost or delayed start;
- test an equipment repair;
- reduce unused credit availability if that is a real risk.
The Federal Deposit Insurance Corporation's small-business financial-management guide explains that a business can be profitable and still run out of cash, and that projections help identify financing needs.
Hold a Weekly Cash Meeting
Use the same day and agenda:
- Reconcile actual cash.
- Replace the prior week's forecast with actual receipts and payments.
- Explain material timing and amount differences.
- Update customer collection dates.
- Update project cost and payroll timing.
- Add a new Week 13.
- Review the lowest cash week and reserve gap.
- Assign actions with owners and dates.
Useful actions may include:
- accelerating billing documentation;
- escalating a collection;
- requesting a deposit when contractually appropriate;
- resolving a pending change order;
- sequencing purchases;
- revising hiring or equipment timing;
- arranging credit before the gap;
- adjusting owner distributions.
Measure Forecast Accuracy
Track whether differences came from:
- amount;
- timing;
- omission;
- duplicate;
- unsupported assumption;
- operational change.
Repeated errors should change the forecasting method. If a customer consistently pays 15 days later than assumed, update the model. If project managers omit committed costs, change the input process.
The U.S. Small Business Administration emphasizes that forecasting is useful when owners compare actual results with the plan and manage the underlying drivers. See the SBA's financial forecasting guidance.
Connect Cash to Backlog Decisions
Before accepting or accelerating work, model the cash required to mobilize and perform it.
Ask:
- When will labor and material cash leave?
- When can the first billing occur?
- What approval and collection lag is realistic?
- Does retainage increase?
- Will the new job overlap other cash-intensive work?
- Is the margin sufficient for the working-capital demand?
Growth can increase profit and still create a liquidity crisis.
If your bank balance remains surprising despite profitable job reports, book a 15-minute construction accounting fit call. We can help connect job costing, WIP, collections, and a weekly cash forecast.
This article is educational. Financing, contract, tax, and restricted-cash decisions require review of the actual terms and facts.
