Finance and performance
Why Profitable Businesses Run Out of Cash: A Practical Guide for SMEs
Profit does not pay a bill until it becomes cash. A practical look at working capital, payment timing and a forecast you can use to make decisions.
By Michael Walsh · · 5 min read
The accounts show a profit, sales are increasing, and the bank balance is heading in the wrong direction. For a business owner, that combination can feel contradictory. It is often a timing problem: income has been earned, but the cash has not arrived, while wages, suppliers and other commitments still need to be paid.
A profitable business can therefore face a cash shortage without its accounts being wrong. The useful question is where money is tied up, when it will be released and which decisions can improve the position. This guide sets out a practical approach for SME owners, using an illustrative example rather than an Atlantic Edge client case.
Profit measures performance. Cash determines what you can pay.
A profit and loss account records revenue and costs for a period. Under accrual accounting, a credit sale can contribute to profit before the customer pays. Some costs also reach the accounts at a different time from the related payment. A bank balance answers another question: how much money is available now?
Buying equipment illustrates the distinction. The cash may leave immediately, while the cost is recognised over time through depreciation. Repaying loan principal uses cash without being an operating expense in the P&L. Conversely, a new loan increases cash without creating trading profit. These differences make it unwise to use reported profit as a proxy for spending capacity.
The first step is to look at the P&L, balance sheet and cash movements together. If profit improves while cash deteriorates, ask what changed in customer balances, stock, supplier balances, investment and financing. That turns a vague concern into a set of issues someone can investigate.
Working capital is often where the cash is hiding
For operational decisions, focus on trade debtors, stock and trade creditors: money customers owe, money committed to goods not yet sold, and supplier bills still to be paid. A business that pays suppliers before collecting from customers must fund the gap. Longer customer payment times or extra stock can widen it.
Growth can make this more demanding. Additional orders may require materials, staff time and delivery costs before the related cash arrives. Even a healthy margin does not remove that funding requirement. Enterprise Ireland's financial planning guidance explicitly includes investment and the cash tied up in inventory and customer credit.
Check the cause rather than assuming customers are simply slow. An invoice may be late because nobody issued it promptly, a purchase order is missing, the work is disputed, or the customer requires evidence of delivery. Each problem calls for a different response. The same applies to stock: seasonal preparation, obsolete items and avoidable over-ordering should not be treated as one issue.
An illustrative month: €10,000 profit, €20,000 less cash
Consider a fictional business with €100,000 of sales and €90,000 of expenses recognised in the month. It reports €10,000 profit. However, €25,000 of those sales remain unpaid, and it pays €5,000 of supplier bills carried over from the previous month. Assume the remaining current expenses are paid, and there are no other movements.
The month brings in €75,000 and pays out €95,000. Cash falls by €20,000 despite the profit. With €30,000 opening cash, the closing balance is €10,000. This simplified example excludes VAT, tax, stock movements, depreciation, investment and financing to isolate the effect of payment timing. A real forecast must include the applicable cash commitments.
The unpaid invoices may be collected next month, but that does not help with a payment due this Friday. Equally, collecting an old invoice improves current cash without creating new revenue. Looking at timing makes both effects understandable.
| Movement | Amount |
|---|---|
| Reported profit | €10,000 |
| Less current sales not yet collected | −€25,000 |
| Less prior-month supplier bills paid | −€5,000 |
| Net cash movement | −€20,000 |
| Opening bank balance | €30,000 |
| Closing bank balance | €10,000 |
Build a forecast around bank movements
A rolling 13-week cash forecast is a useful starting point when payment timing matters. Begin with the reconciled bank balance, then estimate receipts and payments by week. Keep a longer monthly view for seasonal changes and larger decisions.
Base receipts on expected collection dates, not invoice dates or a sales target. Separate issued invoices from forecast sales, and be explicit about the payment assumptions for each. Ask the person closest to the customer whether a disputed or overdue amount is likely to arrive when assumed. Avoid counting the same receipt twice.
List payroll, supplier payments, rent, loan repayments, tax and VAT payments where applicable, equipment purchases and owner withdrawals. Use the actual expected payment dates and check the relevant obligations with your accountant. Keep restricted funds and available borrowing separate from unrestricted cash. An overdraft limit is useful context, but it is not trading income.
Show opening cash, total receipts, total payments and closing cash for each week. Add a downside scenario: what happens if a major customer pays two weeks later, or a purchase must be made earlier? The point is to expose a decision while there is still time to make it, rather than to create a precise-looking spreadsheet.
Improve the process before chasing a bigger balance
Invoice as soon as the agreed trigger is reached and make it easy for the customer to approve and pay. Confirm the correct recipient, purchase order and supporting documentation before delivery. Give one person responsibility for a weekly overdue review, recording the reason for delay, the next action and its owner.
Consider deposits or staged payments where commercially appropriate and agreed with the customer. Review stock purchases against demand and lead times. Discuss realistic supplier terms before a shortfall develops; do not build a plan around paying late without agreement. For a large order, examine its cash requirement alongside its margin before committing.
Update the forecast weekly against actual bank movements. Explain the main differences: a receipt moved, an estimate was wrong, or a payment was omitted. Keep a short decision log so the review ends with actions, not just another version of the file. If the business repeatedly needs more funding than planned, investigate pricing, margins and the operating model as well as timing.
A useful first review
Start with three questions: which customers account for most outstanding money, which upcoming week has the lowest cash balance, and which practical action could improve that week? Bring the aged debtor report, bank reconciliation and known payment commitments together. A small, reliable view is more useful than an elaborate forecast nobody maintains.
Atlantic Edge's finance health checks and management information support can help owners connect cash, margins and day-to-day decisions. Based near Westport, County Mayo, the practice supports businesses locally and further afield. If the numbers feel disconnected from what is happening in the bank, a conversation can help identify a sensible starting point.
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General business guidance. Specific tax, accounting and legal decisions should be discussed with the appropriate professional adviser. All numerical scenarios here are illustrative.