Cash-Flow Forecasting: A Practical Guide for Growing Businesses

It is one of the most common surprises in business: the profit and loss account shows a healthy profit, yet the bank balance keeps shrinking. Profit and cash are not the same thing. Customers pay late, inventory ties up money, tax bills arrive in lumps, and growth itself consumes cash. A cash-flow forecast is the simplest way to see these pressures coming.

Why profit is not cash

Profit is recorded when you earn income and incur costs, not when money moves. If you invoice a large order today and the customer pays in 60 days, your profit rises now but your cash does not. Meanwhile you may already have paid suppliers and staff to deliver that order. The faster you grow, the bigger this gap can become.

Start with a 13-week forecast

For most small and mid-sized businesses, a rolling 13-week forecast (roughly one quarter) strikes the right balance between detail and effort. Week by week, it shows:

• Opening cash: the balance at the start of the week
• Cash in: customer receipts, based on when invoices are actually likely to be paid
• Cash out: payroll, rent, suppliers, loan repayments, tax payments and capital purchases
• Closing cash: which becomes the next week’s opening balance

Be realistic about timing

A forecast is only as useful as its timing is realistic. Use your actual payment history: if customers typically pay in 45 days despite 30-day terms, forecast 45. Include irregular items such as annual insurance, quarterly tax payments and bonuses, because these are often what cause a squeeze.

A forecast does not need to be perfect. It needs to be updated every week and honest about when cash really moves.

Update it every week

A rolling forecast only works if it is current. Each week, replace the forecast figures for the week just ended with actuals, add a new week at the end and review the differences. Over time you learn where your assumptions are too optimistic, and the forecast becomes more accurate.

Use it to make decisions

When you can see a shortfall coming weeks in advance, you have options:

• Chase specific overdue invoices or offer early-payment incentives
• Agree revised payment terms with key suppliers
• Delay a discretionary purchase or phase an investment
• Arrange an overdraft or financing facility before you need it; lenders are far more receptive when you are not in a crisis

A forecast can also show when it is safe to invest: hiring a new team member, launching a marketing campaign or buying new equipment.

When to get help

If cash feels tight, you are planning significant growth, or you simply do not have time to build and maintain a forecast, our business advisory team can set one up using your own data and review it with you regularly. Reliable, up-to-date bookkeeping makes forecasting faster and far more accurate.