Profit vs Cash Flow: What's the Difference?

What is profit?

Profit is what's left when you subtract your costs from your income for a period, such as a month. If you invoiced R50,000 in March and your costs for March were R38,000, your profit for March is R12,000.

Notice the word "invoiced". Profit usually counts income when you've earned it — when the work is done and billed — not necessarily when the money lands in your account.

What is cash flow?

Cash flow is the actual movement of money in and out of your bank account. Money in: customers paying, loans received. Money out: suppliers, rent, salaries, loan repayments, equipment purchases.

Positive cash flow means more came in than went out during the period. Negative cash flow means the opposite — even if, on paper, you made a profit.

A simple example

Thandi runs a small catering business in Pretoria. In June she lands a large corporate function worth R60,000. Her ingredient, staff and transport costs come to R40,000, all paid upfront in June.

• Profit for June: R60,000 − R40,000 = R20,000. A great month.
• Cash flow for June: the client pays on 60-day terms, so nothing comes in. Thandi is R40,000 out of pocket.

Her business is profitable, but in July she may struggle to pay rent. That gap — between earning money and receiving it — is where many healthy small businesses get into trouble.

Why profitable businesses run out of cash

Slow-paying customers

Long payment terms, or customers who simply pay late, are the most common cause. The sale counts as profit, but the cash is sitting in someone else's account.

Buying stock or equipment

A large stock order or a new piece of equipment drains cash immediately, even though it supports income over many months.

Growing quickly

Growth often means paying for materials and staff before the larger invoices are paid. Fast growth can strain cash more than a slow month.

Loan repayments and owner drawings

Repaying the capital on a loan, or taking money out for yourself, reduces cash without appearing as a business expense in the same way.

Which one should you watch?

Both — but for different reasons. Look at profit monthly to check that your prices cover your costs. Look at cash weekly so you can see a shortfall coming before it arrives.

• Profit answers: "Is this business worth running the way it's set up?"
• Cash flow answers: "Can I pay everyone on time this month?"

Accurate numbers depend on good records. Start with How to Track Business Expenses in South Africa, then use our practical list of 10 Ways to Improve Small Business Cash Flow in South Africa.

Quick ways to close the gap

1. Invoice the same day the work is done — see How to Create a Professional Business Invoice in South Africa.
2. Ask for a deposit on larger jobs, agreed upfront in your quote.
3. Follow up overdue invoices politely but consistently.
4. Keep a small cash buffer for slow months.

Frequently asked questions