The invoice is sent, the work is finished, and the money still is not in the account. For a small business, that gap can matter more than whether the month looks profitable on paper. A useful cash-flow plan makes those timing gaps visible early enough to respond.
Start With Dates, Not Averages
Write down expected cash coming in and going out by week. Include invoice due dates, recurring software charges, rent, payroll, taxes, loan payments, and the smaller costs that recur, such as shipping or supplies. Use the dates you expect money to arrive, not the dates you issue invoices.
Keep estimates separate from confirmed amounts. A signed project may be likely income, but it is not cash in the bank; an invoice past its due date needs a follow-up, not an optimistic assumption. This distinction helps you see which weeks depend on money that could arrive late.
Choose a Regular Review
Once a week, compare the plan with actual account activity and update the next several weeks. If a customer has not paid, move that receipt to a realistic date and check whether any planned spending now needs to wait. A simple spreadsheet is enough if it is current and easy to read.
When cash may be tight, act on the cause rather than simply cutting at random. Confirm invoice status, ask suppliers about payment timing, and delay optional purchases where that is workable. For tax, payroll, or borrowing decisions, check current official guidance or speak with a qualified professional; the rules depend on your situation and may change.