What it means
A cash budget starts with the opening bank balance, adds expected receipts and subtracts expected payments to produce a closing balance for each period. Roll that forward across twelve months and you have a map of when the business is comfortable and when it is tight.
The value lies in the timing, not in the annual totals. Receipts are driven by collection patterns rather than by sales, so a forecast that assumes customers pay on time when they historically pay in 55 days will be wrong in a predictable direction.
Payments split between committed items such as payroll, rent, loan instalments and tax, and discretionary items such as marketing and capital spending. Separating the two shows how much room there really is to manoeuvre in a bad month.
The point of the exercise is early warning. If the budget shows the balance dipping below the minimum operating level in month seven, there are six months in which to arrange an overdraft, chase collections, delay a purchase or reprice.
Discovering the same gap in the week it arrives leaves only expensive options. Good cash budgets are compared against actual results every month, with variances explained by whether the difference was volume, price or timing.
Over time this sharpens the assumptions, particularly the collection profile and the seasonal pattern. A budget nobody revisits is a document rather than a tool.
Most businesses run at least two versions: a base case, and a downside in which sales fall and customers simultaneously pay more slowly. Because those two shocks usually arrive together, testing them separately understates the real risk.
The downside case is what tells you how much headroom you actually need to arrange.
In practice
Real-world examples.
Example
A toy retailer buys stock from August to October for a December selling season. Its cash budget shows the balance bottoming out in late October, six weeks before the money comes back, so the finance manager arranges a seasonal overdraft in June while the bank is relaxed. The facility is repaid in full by January.
Example
A subscription software business bills most customers annually in January. The cash budget shows a large January inflow followed by eleven months of steady outflow, so the leadership team sets a rule that the January balance is not treated as spendable surplus. Hiring plans are paced against the monthly profile instead.
Example
A civil engineering contractor works on projects where 5% of each invoice is retained and released twelve months after completion. Its cash budget models those retentions as separate line items in the month they are genuinely due. Without that detail the forecast would overstate receipts by roughly the value of one month's revenue every year.
Formula
Calculation
Closing Cash Balance = Opening Cash Balance + Total Cash Receipts - Total Cash Payments
A distributor opens March with $80,000 in the bank. It expects to collect $260,000 from February sales, $150,000 from January sales and $10,000 of interest, giving receipts of $260,000 + $150,000 + $10,000 = $420,000.
Planned payments are payroll of $180,000, supplier settlements of $150,000, rent and overheads of $45,000 and a quarterly tax payment of $30,000, giving $180,000 + $150,000 + $45,000 + $30,000 = $405,000.
Closing Cash Balance = $80,000 + $420,000 - $405,000 = $95,000.
The board has set a minimum operating balance of $75,000, so March leaves headroom of $95,000 - $75,000 = $20,000. That is thin: if collections came in 10% below plan, receipts would fall by $42,000, the closing balance would be $95,000 - $42,000 = $53,000, and the business would sit $22,000 below its own floor.Case study
Seen in the real world.
Kestrel Signage is an invented fabrication business used here as an illustrative example. It won a $900,000 contract that looked like the best news in its history, with a comfortable margin and a well-known client.
Building the cash budget changed the mood. The job needed $260,000 of materials and $170,000 of labour before the first milestone could even be invoiced, a total of $430,000, and the client paid 45 days after invoice. Starting from an opening balance of $180,000, the projected balance fell to $180,000 - $430,000 = minus $250,000 before any money came back.
In this fictional example Kestrel negotiated a $200,000 advance payment and staggered its material deliveries so that roughly $80,000 of spending moved into a later month. Those two changes lifted the projected low point from minus $250,000 to a positive $30,000, and the contract went ahead without emergency borrowing.
Watch out
Common mistakes.
- Budgeting receipts on the invoice date rather than the date customers actually pay.
- Leaving out lumpy items such as tax payments, insurance renewals and loan instalments because they are not monthly.
- Building only a base case, when the risks that matter tend to arrive together rather than one at a time.
Questions
People also ask.
How far ahead should a cash budget run?
Twelve months rolling is a common standard, often supported by a more detailed thirteen-week view for near-term decisions.
Is a cash budget the same as a profit budget?
No, a profit budget shows performance under accounting rules, while a cash budget shows when money physically moves and what the bank balance will be.
What should you do when the budget shows a shortfall?
Act on it early by arranging facilities, tightening collections, rescheduling discretionary spending or renegotiating supplier terms, since all of those get harder as the date approaches.
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