Cash Flow vs Profit: Why Profitable Small Businesses Still Run Out of Money

Profit tells you whether the business earns more than it spends over a period. Cash flow tells you whether you have money in the bank when bills are due. They are measured differently, they move at different times, and confusing them is one of the most common reasons otherwise healthy small businesses get into trouble.

Why the two numbers differ

Under accrual accounting, which most businesses use for their profit and loss statement, a sale is recorded when you invoice, not when the customer pays. Costs are recorded when you incur them, not when you pay. So the profit figure can include money you have not received yet, and ignore money you have already spent.

The most common gaps are:

• Customer payment terms. You invoice in March, the customer pays in May.
• Stock. Cash spent on inventory sits on shelves; it only becomes a cost in the profit figures when the goods are sold.
• Equipment purchases. A large purchase leaves the bank account at once but is spread across several years as depreciation.
• Loan repayments. Paying back the principal reduces cash but is not an expense in the profit and loss statement.
• Tax and VAT or GST payments that fall due in lumps.

A simple example

Imagine a small manufacturer wins a large order worth 50,000. Materials and labour cost 35,000, so the order is profitable by 15,000. But the supplier wants payment within 30 days, wages are due every month, and the customer pays 60 days after delivery. For roughly two months the business has paid out most of the 35,000 and received nothing. If it only had 20,000 in the bank, a profitable order has just created a cash crisis.

The figures are illustrative, but the pattern is very common, especially when a business is growing quickly.

Forecast cash 13 weeks ahead

A rolling 13-week cash forecast is the most useful financial tool for a small business. It is just a spreadsheet:

1. Start with today's bank balance.
2. For each of the next 13 weeks, list the cash you realistically expect to receive. Use the date customers actually pay, not the invoice due date.
3. List every payment going out: wages, rent, suppliers, loan repayments, tax, subscriptions.
4. Calculate the closing balance for each week and carry it forward.
5. Update it every week with what actually happened.

Any week where the balance drops below a safe minimum is a problem you can now see weeks in advance, while there is still time to act.

Ways to improve cash flow

Get paid faster

• Invoice immediately when work is delivered, not at month end.
• Ask for deposits or staged payments on larger jobs.
• Make paying easy: payment links, multiple methods, clear due dates.
• Follow up on overdue invoices on a fixed schedule. Polite, consistent reminders work.

Pay out more deliberately

• Negotiate supplier terms that match your customer terms where possible.
• Avoid paying early unless there is a discount worth taking.
• Lease or finance equipment when buying outright would drain your reserve.

Keep a buffer

Aim to hold enough cash to cover at least one to three months of fixed costs. Agree any overdraft or credit line before you need it; lenders are more helpful when you are not in a hurry.

Read both statements

Your accountant can produce a cash flow statement alongside the profit and loss account. Read them together each month: profit shows whether the business model works, cash flow shows whether you can keep operating while it does. If you are planning a new venture, build cash timing into your one-page business plan from the start.

This article is general information, not financial advice. Speak to a qualified accountant about your specific situation.