A company can close the year with a profit on the income statement and still not have enough to pay January salaries. It is not an accounting contradiction. They are two different questions, and confusing them is one of the most frequent causes of crisis in companies that, on paper, were doing fine.
Earning is not collecting
The income statement answers one question: if I sold at this price and spent this much, did anything remain? It records the sale when it is invoiced, not when it is collected. It is the right tool to measure profitability.
Cash flow answers another: do I have enough to pay what falls due this week? It records money when it comes in and when it goes out. It knows nothing about profitability, it knows about availability.
The distance between the two questions is the payment term. If you invoice at 60 days and pay suppliers at 30, every unit of growth forces you to finance a month of operations. The more you sell, the more cash you need.
Profitability is measured once a month. Cash is measured every day.
The three flows worth separating
A useful cash flow separates where the money comes from. Mixing them hides the very problem you are trying to find.
- Operating. Customer collections minus payments to suppliers, salaries, taxes and expenses. The only one that says whether the business stands on its own.
- Investing. Buying or selling fixed assets, machinery, vehicles, software. It leaves today and comes back over years.
- Financing. Loans received, repayments, partner contributions, withdrawals. Money that comes in without being a sale and leaves without being a cost.
The most common mistake
Building the cash flow, finding the problem and filing it away. A cash flow is useful if someone updates it and if someone makes decisions with it. Without those two conditions it is just one more accounting exercise.