What it means
The forecast is built from timing rather than accounting. Every expected receipt and payment is placed in the period the cash will genuinely move, so an invoice raised in March on sixty day terms appears as cash in May.
It matters because profitable businesses fail from running out of cash, and a forecast is what turns that risk from a surprise into a scheduled event you can plan around. Spotting a shortfall eight weeks out gives you options; discovering it on the day gives you none.
Most companies use the direct method for short horizons, listing actual expected receipts and payments line by line over the next thirteen weeks. Longer horizons of a year or more usually switch to the indirect method, which starts from forecast profit and adjusts for working capital movements, depreciation, capital spending and financing.
The forecast is only as good as its assumptions about customer payment behaviour, so the collection profile deserves careful attention. A sensible approach is to look at how each significant customer has actually paid over the last year rather than assuming everyone pays on the agreed terms.
Good practice is to run the forecast on a rolling basis and to compare each week's forecast against what actually happened. That variance review is where the forecast improves, because it exposes which assumptions are consistently optimistic.
In practice
Real-world examples.
Example
A restaurant group builds a thirteen week forecast before signing a lease on a fourth site. The forecast shows the fit out payments landing in the same six weeks as the annual insurance renewal, so the opening is moved back a month to avoid the collision. Nothing about the profit plan changed, only the sequencing of the payments.
Example
A recruitment agency pays contractors weekly but is paid by clients monthly. Its forecast quantifies the gap precisely, supporting an invoice finance facility sized to the peak rather than to the average. Sizing to the average would have left the agency short in exactly the weeks that matter most.
Example
A manufacturer forecasts a large tax payment and a machinery deposit falling in the same week. Rescheduling the deposit by ten days keeps the account inside its overdraft limit and avoids an unauthorised borrowing charge. The saving was small in dollars but the credibility gained with the bank was worth considerably more at the next review.
Think of it
“Cash forecast is predicting your future cash position-seeing what's coming ahead.
Formula
Calculation
Closing cash = Opening cash + Total receipts - Total payments
A design agency starts April with $420,000 in the bank. It expects customer receipts of $780,000 during the month, and its scheduled payments are payroll of $310,000, suppliers and subcontractors of $395,000, rent and overheads of $95,000, and a tax instalment of $65,000.
Total payments are $310,000 + $395,000 + $95,000 + $65,000 = $865,000, so closing cash is $420,000 + $780,000 - $865,000 = $335,000. The board has set a minimum operating buffer of $300,000, which means April ends with only $35,000 of headroom above the floor and a single late payment from a major client would breach it.Case study
Seen in the real world.
This is an illustrative and entirely fictional story. Calderfield Joinery, an invented shopfitting contractor, was busy and profitable on paper, with a full order book and a healthy reported margin. It had never produced a cash forecast, relying instead on a glance at the bank balance each Monday morning.
When a new finance manager built a thirteen week direct forecast, it showed the company running $180,000 short in week nine. Three large jobs completed in the same fortnight, meaning materials and subcontractor costs were paid long before the retention releases and final certificates turned into cash.
Calderfield's fictional owner used the eight weeks of warning to negotiate stage payments on two of the contracts and agreed a temporary overdraft extension with the bank while the account was still comfortably in credit. The shortfall never materialised, and the weekly forecast became a permanent fixture of the management meeting.
Watch out
Common mistakes.
- Treating the profit forecast as a cash forecast, which ignores the timing of receipts, payments, tax, capital spending and loan repayments entirely.
- Assuming customers will pay on agreed terms rather than on their historic pattern, which typically overstates receipts by several weeks.
- Forgetting the irregular items such as annual insurance, tax instalments and bonus payments, which are exactly the ones that cause a breach.
Questions
People also ask.
How far ahead should a cash forecast run?
Thirteen weeks in detail is the common standard for managing day to day liquidity, supported by a rolling twelve month view for planning.
Who should own the cash forecast?
Finance builds it, but sales and operations must supply the timing assumptions, since they know when orders will ship and when customers are likely to pay.
How accurate should it be?
A well run weekly forecast usually lands within about 5% of actual closing cash, and the variance review matters more than the headline accuracy.
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