What it means
The question behind this term is blunt: how much cash do we need, and by when? Answering it means listing committed payments such as payroll, rent, tax, supplier invoices, loan instalments and planned capital spending, then setting them against realistic receipts rather than optimistic ones.
Businesses get into trouble not because they lack profit but because the timing of money in and money out does not match. Requirements analysis is what exposes that mismatch early enough to arrange a facility, delay a purchase or accelerate collections.
A proper calculation includes a minimum operating balance, sometimes called a cash buffer. Most finance teams set this at somewhere between two and six weeks of operating costs, because running an account down to zero leaves no room for a single late payer.
Requirements are usually calculated over several horizons at once. The thirteen week view drives day to day decisions, the annual view drives facility negotiations, and a three year view supports decisions about premises, equipment or acquisitions.
The most common refinement is to build the requirement under more than one scenario. A base case tells you what you expect to need, while a downside case with slower collections and softer sales tells you the facility size you should actually be asking your bank for.
In practice
Real-world examples.
Example
A school uniform supplier calculates that it needs $850,000 of cash between March and July to build stock for an August selling season. It agrees a seasonal facility with its bank in January rather than discovering the requirement in May.
Example
An engineering consultancy wins a two year public contract that pays quarterly in arrears. Working out that it must fund $600,000 of salaries before the first payment arrives leads it to negotiate a mobilisation payment into the contract.
Example
A restaurant group models its cash requirement for a fourth site and finds that the fit out and three months of trading losses total $740,000, well above the $500,000 the owners had assumed. The opening is delayed by a quarter so the group can fund it without borrowing.
Think of it
“Cash flow requirements are your minimum cash needs-what you must have to keep operating.
Formula
Calculation
Cash requirement = expected cash outflows + minimum closing buffer - expected cash inflows - opening cash balance
A garden equipment retailer plans its next quarter. Operating outflows are $2,400,000, planned capital spending is $300,000, and loan repayments are $180,000, giving total outflows of $2,400,000 + $300,000 + $180,000 = $2,880,000.
Expected receipts for the quarter are $2,600,000, the opening cash balance is $200,000, and the board insists on holding at least $250,000 at the quarter end. Cash requirement = $2,880,000 + $250,000 - $2,600,000 - $200,000 = $330,000, so the retailer needs an overdraft or a deferral of at least $330,000 to get through the quarter as planned.Case study
Seen in the real world.
This illustrative example features Calder Textiles, an entirely invented fabric wholesaler turning over $9 million a year. Calder had always managed cash by watching its bank balance and had never formally calculated what it would need across a full season, largely because the balance had never gone below $200,000.
When the fictional business landed a contract to supply a hotel refurbishment chain, the finance manager built a thirteen week requirement schedule for the first time. It showed outflows of $2,880,000 against receipts of $2,600,000 for the quarter, and once the board's $250,000 minimum balance was included, a requirement of $330,000 more than the company held.
Calder used the schedule to arrange a $500,000 invoice finance facility, sized against a downside case rather than the base case. In this illustrative outcome the company drew only $310,000 at the deepest point, but the extra headroom meant it could accept a second contract in the same season instead of turning it away.
Watch out
Common mistakes.
- Building requirements from invoice dates rather than expected payment dates, which understates the funding needed by exactly the length of the customer payment delay.
- Leaving out irregular payments such as quarterly tax, annual insurance and bonus runs, which are the items most likely to cause a surprise.
- Calculating a requirement of zero and treating that as safe, when a business with no buffer fails on the first late payment it receives.
Questions
People also ask.
How big should the cash buffer be?
A common rule of thumb is two to six weeks of operating costs, with the higher end for businesses that have lumpy receipts or few customers.
Is a cash requirement the same as a funding requirement?
Almost, but the cash requirement is the gap in the plan, while the funding requirement is the facility you arrange to cover that gap plus sensible headroom.
How often should the calculation be refreshed?
Weekly for the short horizon and at least monthly for the annual view, because a requirement calculated once a year is out of date within weeks.
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