13-Week Cash Flow for Construction Companies: What the CEO Needs to See

A construction company can close the month with positive cash and already be heading toward a crisis six weeks out. Payroll is covered today, suppliers are still within terms, and the backlog looks healthy. But a significant payment application is awaiting approval, two mobilizations start at the same time, and a tax deadline lands in the same week as subcontractor payments. The bank balance does not show that convergence. It only shows the result of decisions that have already reached cash.

A 13-week cash flow forecast for construction companies exists to make that pressure visible while there is still time to act. It is not a spreadsheet that finance prepares to explain the past. It is an executive anticipation tool: it translates production, contracts, purchasing, and collections into a weekly view of the company's and the portfolio's liquidity.

In the first article of this series, we discussed why growth can consume a contractor's working capital. In the second, we showed how to calculate the cash required for a new construction project before signing the contract. Now the question changes: once the contracts are signed, how do you see, week by week, whether the combination of their cash curves still fits within the company's cash?

Why the bank balance, the P&L, and a monthly cash flow are not enough

The bank balance is a snapshot. It does not reveal that a receipt expected on Tuesday depends on a payment application that has not yet been approved, or that the steel purchase is due before the owner pays. Nor does it separate unrestricted cash from funds tied to a specific project, a restricted account, or an obligation. Cash that cannot be moved to fund the portfolio should not be treated as available liquidity.

The P&L answers an economic question: what was the operating result on an accrual basis? Recognized revenue is not cash collected. A cost incurred is not necessarily a disbursement on the same date. A positive margin can coexist with a run of weeks in which the company pays for production before it gets paid for it.

A monthly cash flow adds timing, but it can still hide the trough inside the month. $1 million of inflows in the last week does not automatically fund a payroll due in the first week. When risk is concentrated in a few days, the monthly total can look sufficient while the critical week remains uncovered. In the week of greatest pressure, the weekly forecast should be supplemented by a daily schedule of disbursements and receipts.

Why 13 weeks — and what a rolling forecast means

Thirteen weeks is roughly one quarter. The horizon is short enough to tie disbursements to specific purchase orders, contracts, payroll, and payment applications, and long enough to allow executive action before a cash shortfall: accelerating an approval, renegotiating a purchase, sequencing a mobilization, or arranging liquidity in advance.

A 13-week cash flow forecast is a rolling projection of actual cash inflows and outflows, organized by week and updated weekly, that projects available cash and shows how far it sits from the minimum liquidity threshold the company has set.

This rolling forecast does not end at the close of the quarter. With each update, the week just completed is replaced by actuals, variances are explained, the following 12 weeks are revised, and a new week is added. The horizon stays at 13 weeks. The later weeks require more assumptions; that should show up in a confidence rating, not be hidden behind decimal places.

The tool does not replace the budget, profitability analysis, or long-term financial planning. It connects those instruments to immediate execution. Its value lies in its ability to bring decisions forward, not in producing a forecast that looks perfect.

How to structure a contractor's cash flow by week

• Opening available cash: cash that is actually usable at the start of week one, reconciled to the bank and net of restrictions. In subsequent weeks, it equals the prior week's ending balance.
• Weekly inflows: receipts identified by project, owner, document, probable date, and level of confirmation. The roll-up must allow every number to be traced back to its source.
• Weekly outflows: committed obligations and expected disbursements, separated by project and corporate overhead. Distinguish contractual commitments from decisions that can still be avoided.
• Net cash flow for the week: inflows minus outflows. It shows how much the operation generates or consumes in the period, without confusing movement with the cumulative balance.
• Projected ending balance: opening balance plus net cash flow for the week. This is the cash that remains after expected inflows and outflows.
• Minimum cash / liquidity threshold: the operating reserve the company sets for its obligations, restrictions, and risks. It is a management assumption, not a universal percentage.

The two core relationships are: weekly net cash flow = inflows for the week − outflows for the week; weekly ending balance = weekly opening balance + weekly net cash flow. Liquidity headroom is projected ending balance − minimum cash. If that difference turns negative, the company is already in the attention zone, even if the bank still shows a positive balance.

Inflows: production is not a confirmed collection

• Payment applications and approved pay apps: break out work in place to be billed, the payment application submitted, its approval, and the contractual payment date. An approved payment application reduces one uncertainty, but it does not eliminate the risk of the owner paying late.
• Collections by project and owner: identify pending installments, invoices, and conditions. For developers, include buyer deposits and expected loan draws only when their documentation and lender conditions are identified.
• Advances: record them when there is a well-supported expectation of receipt, and check for any restrictions on use or offsets against future payment applications.
• Released retainage: consider acceptance, completion, contractual timing, and required documentation such as lien waivers and closeout. Do not pull into cash any retainage whose release still depends on unmet conditions.
• Non-recurring receivables: the sale of an asset, a refund, a settlement, or any other one-time inflow must have its source and probability stated explicitly; it cannot be allowed to mask weakness in the operating cycle.
• Credit lines: include draws only when the line is actually available, borrowing conditions are met, and the date is feasible. An approved facility is not cash; a term sheet under negotiation is not a confirmed source.

Separate operating collections from financing. If a credit draw enters the forecast, also record fees, interest, and principal payments in the weeks they fall due. Do not count the same funds both as a projected inflow and as an additional reserve outside the curve.

Outflows: the portfolio takes on commitments before cash goes out

• Payroll and payroll burden: the actual calendar for wages, benefits, payroll taxes, and labor-related obligations, including the crews on all four projects and the office staff.
• Suppliers, subcontractors, and critical materials: contractual due dates, payment milestones, purchases already committed, and items that cannot slip without stopping work.
• Equipment and general conditions: rentals, fuel, maintenance, site facilities, and field support costs.
• Taxes, insurance, and bonds: actual due dates, applicable taxes, and insurance or performance and payment bond premiums when the contract requires them.
• Corporate overhead and debt service: rent, systems, services, administrative expenses, interest, and principal, without spreading corporate overhead so thin that it disappears.
• Mobilizations and new projects: start-up costs, deposits, initial purchases, and future commitments arising from contracts already signed. Projects still under negotiation should appear as scenarios, not as certain obligations.

Procurement needs to bring in what has already been committed, even when the invoice has not yet arrived. Operations needs to show what will be required to deliver the planned production. A forecast that contains only the payables recorded by accounting can be correct in the system and incomplete in the reality of the jobsite.

The right date is the probable cash date, not the accrual date

Work performed in week 2, billed in week 3, approved in week 4, and paid 30 days after approval should not be entered as a receipt in week 2. The forecast must reflect the real sequence and the probable date of receipt, taking into account the contractual schedule, the owner's approval cycle, and the history of delays.

The same applies to purchases and subcontracts: work performed and payment do not necessarily coincide. Record the disbursement on the negotiated due date or the date actually agreed, without shifting payments simply to improve the curve. Classify each inflow as confirmed, probable, or conditional, with an owner for the next action and the evidence that supports the date.

Hypothetical example: four projects and a cash trough in week 7

Consider a U.S. general contractor running four projects at the same time: an industrial warehouse in the structural phase; a multifamily residential building in the MEP rough-in phase; a logistics facility expansion; and a commercial project in mobilization. The projects are fictitious. All figures below are illustrative, consolidated in US$, and are not a minimum cash benchmark for any other company.

Opening available cash is $1,200,000. For this exercise, management has set a minimum cash threshold of $400,000, based on its specific obligations and risks. No credit draws are included in the curve. Outflows include the projects, corporate overhead, and debt service; inflows include expected collections on the four contracts. The payment application approval cycle and the commercial mobilization explain why disbursements are concentrated ahead of collections.

• Week 01: inflows $325,000; outflows $350,000; net cash flow −$25,000; ending balance $1,175,000.
• Week 02: inflows $400,000; outflows $425,000; net cash flow −$25,000; ending balance $1,150,000.
• Week 03: inflows $450,000; outflows $500,000; net cash flow −$50,000; ending balance $1,100,000.
• Week 04: inflows $375,000; outflows $525,000; net cash flow −$150,000; ending balance $950,000.
• Week 05: inflows $300,000; outflows $575,000; net cash flow −$275,000; ending balance $675,000.
• Week 06: inflows $225,000; outflows $600,000; net cash flow −$375,000; ending balance $300,000.
• Week 07: inflows $425,000; outflows $450,000; net cash flow −$25,000; ending balance $275,000.
• Week 08: inflows $550,000; outflows $475,000; net cash flow +$75,000; ending balance $350,000.
• Week 09: inflows $625,000; outflows $450,000; net cash flow +$175,000; ending balance $525,000.
• Week 10: inflows $500,000; outflows $475,000; net cash flow +$25,000; ending balance $550,000.
• Week 11: inflows $650,000; outflows $500,000; net cash flow +$150,000; ending balance $700,000.
• Week 12: inflows $575,000; outflows $500,000; net cash flow +$75,000; ending balance $775,000.
• Week 13: inflows $700,000; outflows $550,000; net cash flow +$150,000; ending balance $925,000.

Over the 13 weeks, inflows total $6,100,000 and outflows $6,375,000. Cumulative net cash flow is −$275,000; added to the opening balance of $1,200,000, it results in $925,000 at the end of week 13. This decline in cash over the horizon does not prove an economic loss: collections and disbursements may belong to different phases of the contracts.

The executive problem is not the ending balance for the quarter. It is the lowest interim balance: $275,000 in week 7, or $125,000 below minimum cash. Week 6 already projects $300,000. If the company looks only at today's balance or the end of the horizon, it can miss two consecutive weeks of pressure and a third week still below the threshold.

This trough is visible in the first update. The CEO does not need to wait until cash runs short to decide. He or she can check the warehouse payment application, revisit the purchasing sequence for the commercial mobilization, and negotiate terms before the due dates. The decision must protect contractual commitments, safety, and production; simply not paying suppliers is not a liquidity strategy.

Three scenarios: Base, Conservative, and Stress

A single scenario tends to turn a collection assumption into a certainty. Use the same base of commitments and change timing, amounts, and conditions explicitly. The conservative scenario should not cut every inflow by an arbitrary percentage: it should show which collections could slip, why, and by how long.

• Base: the curve shown above, with probable dates supported by the information available. Lowest balance: $275,000 in week 7; minimum headroom over $400,000: −$125,000; ending balance in week 13: $925,000.
• Conservative: $200,000 expected in week 4 moves to week 6, and $175,000 from week 5 moves to week 7, because of approval and payment delays. No revenue is lost and outflows stay the same. Balances for weeks 4, 5, and 6 become $750,000, $300,000, and $125,000. The lowest balance is $125,000 in week 6; minimum headroom is −$275,000. In week 7, the balance recovers to $275,000; the horizon ends at $925,000.
• Stress: the $200,000 from week 4 moves to week 7; the $175,000 from week 5 moves to week 8; $150,000 from week 6 moves to week 9; and $175,000 from week 7 moves to week 10. Add a $100,000 non-recurring disbursement in week 6 for extended general conditions. Inflows still total $6,100,000; outflows rise to $6,475,000. The balance is −$325,000 in weeks 6 and 7, first reached in week 6. Minimum headroom is −$725,000; the ending balance in week 13 is $825,000.

In the stress scenario, a negative balance represents a liquidity need that is not yet covered, not a bank balance the company can simply accept. To protect minimum cash, an additional $725,000 would be required at the critical point, or an equivalent combination of accelerated inflows and realistic adjustments to outflows. Any solution must be entered into the forecast with its downstream effects, including debt and financing costs.

The scenarios show why a delay is not just a collections problem. Total revenue in the conservative scenario is identical to the base, and the ending balance is the same, but the worst balance falls by more than half before it recovers. Contractor cash management has to see that timing difference, not just the amount receivable.

The 5 numbers the CEO should review every week

• 1. Lowest projected cash balance: the low point across the 13 weeks. In the base case, $275,000. Read it in each scenario, without offsetting it with collections that will only arrive later.
• 2. Week of the lowest balance: when the pressure materializes. In the base case, week 7; in the conservative case, week 6; in the stress case, weeks 6 and 7. The first occurrence defines how much lead time is available to act.
• 3. Committed outflows over the next 4 weeks: in the example, $1,800,000 in weeks 1 through 4, treated as firm commitments. With each update, recalculate the rolling window and separate non-deferrable obligations from disbursements that can still be negotiated.
• 4. Expected collections over the next 4 weeks: in the base case, $1,550,000 in weeks 1 through 4. The gap against outflows is −$250,000. Show how much is confirmed and how much depends on a payment application, an approval, or collection follow-up; in the conservative case, this window falls to $1,350,000.
• 5. Liquidity buffer / headroom over the threshold: track the smallest distance between projected balance and minimum cash. In the base case, −$125,000. An undrawn line that is actually available can be shown separately as additional capacity, net of conditions and restrictions, without double-counting inflows already in the curve.

These numbers should come with a cause, an owner, and the decision required. "Low minimum balance" is not enough. "The warehouse payment application must be approved by week 4; operations confirms the documentation, and the CEO decides on the commercial mobilization before week 3" is actionable information.

Warning signs that require a decision, not just an observation

• The forecast depends on an unconfirmed collection: minimum cash holds only if a payment application still under discussion is paid exactly on the desired date.
• Suppliers are due before the payment application: purchasing terms are shorter than the cycle between production, approval, and collection. Production increases the capital tied up.
• A new mobilization coincides with the cash trough: the contract may carry an adequate margin and still land in the portfolio's worst liquidity window.
• Taxes and payroll compress the same week: predictable obligations converge while a significant inflow remains conditional.
• Credit repeatedly closes the operating cycle: the forecast holds only with new draws, without a matching recovery and without a clear path to repayment. Financing can be legitimate; recurring dependence without a plan needs to be examined.

Compare forecast to actual. Repeated delays from one owner, omitted purchases, or outflows that always exceed the forecast point to a failed assumption or a governance gap. Do not solve the problem by simply pushing the inflow to the following week; review the history, the confidence rating, and the decision that was left pending.

Governance: one official version per week

• Finance updates: reconciles the balance, loads actuals, maintains documents and dates, consolidates the 13 weeks, and explains variances. It does not decide on its own whether work will be billed or whether a commitment can be deferred.
• Operations validates: confirms production, payment applications, documentation, owner acceptance, and the impact of schedule changes. An expectation of physical progress must translate into a verifiable billing.
• Procurement validates: reports purchase orders issued, committed contracts, critical suppliers, and actual terms. Significant future purchases must appear before they become a surprise in accounts payable.
• The CEO decides: prioritizes actions, assigns owners, approves capital commitments, and addresses the gap to minimum cash. He or she decides on new mobilizations with the consolidated portfolio in view.

Set a weekly close with a cutoff date, one official version, and a record of the assumptions that changed. A short meeting should walk through the five numbers, the changes in the scenarios, and the decisions with deadlines. Archive the previous version to compare forecast and actual; do not keep competing versions in which each department picks the balance that suits it.

Material events do not wait for the next meeting. A rejected payment application or an urgent purchase requires an update and escalation. The weekly discipline organizes the routine; it does not prevent intervention when liquidity changes. The value of the forecast depends as much on the quality of the information as on the speed of the decision.

From project capital requirements to portfolio liquidity

Project & Portfolio Capital Requirement™, introduced in the previous article as an experimental lens, helps estimate how much capital a project or a portfolio requires and where the largest cumulative deficit between disbursements and collections occurs. The 13-week cash flow tracks how that requirement materializes over the rolling horizon, together with available cash, corporate overhead, debt, and other obligations.

A project can fit within cash on its own and, combined with three others, create a trough that no individual analysis shows. Consolidation should not simply add up contracts: it must account for dates, restricted funds, retainage, and shared commitments. That way, a new project is evaluated by the effect it has on the weeks when the company has the least headroom.

In the Elevare methodology, Cash Flow Forecast™ is part of the Capital Capacity™ assessment. In this context, it is the lens for evaluating visibility and discipline in anticipating cash: quality of assumptions, updating, scenarios, and liquidity decisions. It is not a promise to eliminate delays, nor a certification of solvency. The 13-week horizon is a practical way to operationalize that executive view.

The question that needs an answer before cash gets tight

The CEO does not need to review every entry. He or she needs to know whether the dates are defensible, which collections support the curve, how much is committed, and which decision cannot be postponed. A useful forecast makes it possible to act while the company still has options — not merely to explain why the cash ran out.

If none of the collections expected over the next two weeks arrives on the planned date, what will the company's lowest cash balance be — and in which week will it occur?

Answer by moving those inflows to plausible later dates, keeping the commitments in place, and recalculating the 13 weeks. If the answer depends on an assumption with no owner or on credit that is not yet available, the problem is already present in the forecast, even if it has not yet shown up at the bank.

To evaluate how cash forecasting discipline connects to the organizational capability of your construction company, general contracting firm, or development company, explore the Elevare™ Organizational Capability Assessment. The conversation should start from the real decisions and limits of the portfolio, not just from how the current balance looks.

Renato Lerner

Founder, Elevare™

Renato Lerner has 30 years of experience in construction in Brazil, Angola, and the United States. He is the founder of Elevare™ and creator of the Organizational Capability Diagnostic.