Most construction businesses have some form of cash flow forecast. The more important question is whether management can actually use it to make decisions. A forecast that simply takes the current bank balance, adds expected receipts, subtracts expected payments and projects the result forward can provide useful short-term visibility. But as a construction business grows, that is rarely enough. Project timing changes. Claims move. Customers pay late. Variations remain unresolved. New projects mobilise. Retentions accumulate. Equipment is purchased. Bank guarantees consume facility capacity. The result is that cash can move very differently from reported profit. A useful construction cash flow forecast therefore needs to do more than predict the bank balance. It should help management understand what is driving cash, where pressure is developing and what decisions need to be made before that pressure becomes a problem.
Start with the purpose of the forecast Not every cash flow forecast needs to do the same job. A short-term cash forecast might focus on whether the business can meet payroll and supplier payments over the next 8 to 13 weeks. A longer-term forecast might help management understand the working-capital requirements of the forward order book over the next 12 months. Both are useful. But they answer different questions. For a growing contractor, I would generally want visibility across both time horizons. The short-term forecast asks: "Do we have enough liquidity to meet our commitments?" The longer-term forecast asks: "Where is the business heading, and what financial capacity will we need to get there?" Management needs both.
Start with projects, not the bank account One of the weaknesses of many cash forecasts is that they begin with the accounting ledger rather than the operational reality of the business. For a contractor, the projects are what generate most of the cash movements. That means the forecast should be connected to what is actually expected to happen on those projects. For each material project, management should understand:
- expected work performed
- expected billing
- timing of progress claims
- expected certification
- customer payment terms
- major supplier and subcontractor payments
- variations and claims
- retentions
- project completion timing.
This creates a much stronger forecast than simply extrapolating historical receipts and payments. It also forces operations, commercial and finance to work from the same assumptions.
Billing is not the same as cash A project may perform $1 million of work this month. That doesn't mean $1 million arrives in the bank. There may be a delay before the work is claimed. The customer may then take time to certify the claim. Payment terms begin after certification. The customer may pay late. Retention may be deducted. Part of the claim may be disputed. Each step creates a gap between operational performance and cash collection. A useful forecast should reflect those delays rather than assuming revenue converts neatly into cash.
Variations need to be treated realistically Variations are one of the areas where cash forecasts can become overly optimistic. A project team may be confident that a variation is contractually recoverable. That doesn't necessarily mean the cash will arrive when expected.
There is an important difference between: work performed variation submitted variation assessed variation approved variation billed cash received Those stages can be separated by months. A forecast that assumes an unapproved variation will convert into cash next month can create false confidence. Management should therefore understand how much forecast cash depends on unresolved commercial positions.
Look at the working-capital build A good cash forecast should also explain why cash is moving. Management should be able to see what is happening across:
- debtors
- WIP and contract assets
- variations
- retentions
- creditors
- accrued project costs.
If EBITDA is improving but cash is deteriorating, management needs to know why. If the difference is caused by temporary mobilisation of several profitable projects, management may be comfortable funding it. If it is caused by growing overdue debtors and unresolved variations, that is a very different problem. Same cash outcome. Different management response.
New projects deserve particular attention A major contract win should trigger a cash flow discussion before mobilisation. Management should understand: When do costs start? When can the first claim be submitted? When is the first meaningful cash receipt expected?
What is the maximum cash exposure before the project becomes cash positive? Are there guarantees, retentions or other security requirements? What happens if mobilisation takes longer than expected? What happens if the customer pays late? A project can have an attractive forecast margin and still place substantial pressure on the business.
Don't forget corporate cash flows Project cash is only part of the picture. A growing contractor also needs to fund the business around the projects. That can include:
- salaries and corporate overhead
- tax payments
- insurance
- equipment purchases
- finance repayments
- dividends or distributions
- leases
- system investment
- recruitment and mobilisation costs.
Growth can also cause overhead to increase in steps rather than gradually. The cash forecast needs to capture that reality.
Forecast available liquidity, not just cash The bank balance is only one measure of financial capacity. A contractor may also have:
- overdraft facilities
- working-capital facilities
- equipment finance
- bank guarantee facilities
- bonding facilities.
Management should understand how those facilities interact. For that reason, I would want a growing contractor's forecast to show both: forecast cash, and forecast available liquidity and facility headroom.
Use scenarios rather than pretending the forecast is certain No construction cash forecast will be perfectly accurate. That isn't a reason not to forecast. It is a reason to understand the uncertainty. Management should consider scenarios such as: What happens if customers pay 10 days later? What happens if project margins fall by 2%? What happens if $1 million of variations takes another three months to resolve? What happens if two major projects mobilise simultaneously? What happens if a major project commencement is delayed? The objective isn't to predict the future perfectly. It is to understand the range of outcomes the business may need to manage.
Forecast accuracy should be measured One of the best ways to improve a cash forecast is simple. Compare it with what actually happened. If management forecast $3 million of receipts and only $2.3 million arrived, understand why. Was a claim submitted late? Was certification delayed? Did the customer pay late? Was the forecast assumption unrealistic? Over time, this creates accountability around the assumptions going into the forecast.
Warning signs that the cash forecast isn't doing its job I would be concerned if:
- management is regularly surprised by the bank balance
- the forecast is updated only when cash becomes tight
- forecast receipts consistently move into the following month
- project teams aren't involved in cash forecasting
- significant variations are assumed to convert quickly into cash
- WIP and retentions aren't connected to the forecast
- major project wins don't trigger working-capital analysis
- available banking capacity isn't included
- forecast versus actual performance isn't reviewed
- management has only a short-term view of liquidity.
A sophisticated spreadsheet isn't necessarily the solution. A relatively simple forecast built on realistic operational assumptions can be considerably more useful.
What should management actually see? For most growing contractors, I would want the management view to make several things immediately visible: Opening cash and available liquidity Project receipts and major payments Corporate and overhead cash requirements Tax and financing commitments Movement in working capital Expected closing cash Available facility headroom Key assumptions and risks Forecast versus actual performance The management view should make the story obvious.
A cash forecast should create options The greatest value of cash forecasting isn't predicting the exact bank balance on a particular day. It is time. If management discovers next Friday that the business needs another $500,000, the available responses are limited. If the same requirement is identified three months earlier, management has options. Collections can be accelerated. Commercial positions can be resolved. Project timing can be reconsidered. Capital expenditure can be moved. Banking facilities can be increased. Supplier terms can potentially be negotiated. Growth can be staged differently. That is why a useful cash forecast is not simply a finance report. It is an early-warning system for management.
Salt Strategic Advisory works with growing construction, infrastructure and project-based businesses to strengthen financial visibility, project forecasting, cash flow and commercial decision-making. If management is regularly being surprised by cash despite having a cash flow forecast, the issue may not be the absence of forecasting. It may be whether the forecast is connected closely enough to what is actually happening across the business.