Cash flow: formula, definition, and how it differs from profit
Cash flow is the actual movement of money into and out of your business's cash registers and bank accounts over a specific period. Many profitable small businesses run into trouble simply because their money is tied up in unpaid customer invoices or excess inventory when rent, payroll, and supplier bills come due.
Net Cash Flow = Total Cash Inflows − Total Cash Outflows. If your cash and bank accounts receive 150,000 in collections during a month and pay out 120,000 in expenses and supplier payments, your net cash flow is +30,000.
The net cash flow formula and its components
Cash flow only counts money at the moment it actually enters or leaves a cash or bank account. Unpaid sales invoices and unsettled supplier bills do not affect cash flow until payment changes hands, and internal transfers between your own accounts cancel each other out.
To understand liquidity clearly, every period's activity is broken down into three figures:
- Cash inflows: Cash sales, customer collections on credit accounts, and other operating receipts
- Cash outflows: Supplier payments, cash inventory purchases, rent, payroll, utilities, and tax payments
- Net cash flow: Total cash inflows minus total cash outflows over the chosen period
Why cash flow is not the same as profit
Profit and cash flow measure business performance on different timelines. When you issue an approved credit sale invoice, your revenue and gross profit increase immediately, even though no money has reached your bank account yet. Conversely, buying a large batch of stock for cash drains your bank balance right away, while the cost is only recognized against profit as those items are sold.
Because of this timing gap, a fast-growing merchant selling on 30-day or 60-day terms can report strong monthly profit while suffering negative cash flow. Monitoring actual cash balances alongside profit ensures you never run short before upcoming obligations.
Tracking Cash & Bank Accounts and cash flow in GiroPS
In GiroPS, you can set up multiple Cash & Bank Accounts in your business currency or foreign currencies and record every collection, payment, income, expense, and internal transfer. Recording a payment against an invoice or contact updates both the customer or supplier balance and your account balance simultaneously.
The dedicated Cash Flow report summarizes total inflows, outflows by expense category, and net cash change for any date range. Pairing this report with your customer receivables view helps you plan collections before major payments fall due.
Practical scenario
Worked example: profitable month with negative cash flow
A wholesaler starts the month with 40,000 in the bank. During the month, the business sells goods costing 140,000 for 200,000 and pays 25,000 in rent and overhead, earning 35,000 in net profit on paper. However, customers only pay 90,000 in cash during the month, leaving 110,000 on credit. Meanwhile, the wholesaler pays suppliers 115,000 in cash plus the 25,000 in overhead, for total outflows of 140,000. Net cash flow is 90,000 − 140,000 = −50,000, creating a cash shortfall despite strong profit.
Frequently Asked Questions
What does positive vs. negative cash flow mean?
Positive cash flow means your business brought in more money than it paid out during the period, increasing your liquid reserves. Negative cash flow means outflows exceeded inflows, requiring you to dip into prior cash balances or credit lines.
Do transfers between my cash box and bank account affect net cash flow?
No. Moving funds from a physical cash register to a company bank account only changes where the money is held; total business cash remains unchanged.
How can a small business improve its cash flow?
Follow up promptly on overdue customer balances, accept partial payments to accelerate cash collection, avoid tying up cash in slow-moving inventory, and align supplier payment terms with your average collection cycle.