Financial statements are usually read once a year, by an accountant, for tax. That is the least useful thing you can do with them. Four numbers inside them explain most of what is happening in a business, and an owner who checks those regularly can see problems months before they become emergencies.
You do not need to be an accountant to use any of them.
Gross margin tells you whether the model works
Revenue less the direct cost of delivering it, as a percentage. This is the number that says whether you are charging enough, and it is where underpricing shows up first.
Track it per product or per job rather than overall. Almost every business finds that a small number of lines carry it and the rest consume it, and that is not visible in a single blended figure.
Debtor days tells you what is coming
The average time customers take to pay. It moves before revenue does, which makes it the earliest warning signal available to a small business.
If it is lengthening, cash pressure is arriving in a few weeks regardless of how sales look. Acting on that early is the difference between tightening collection and needing emergency finance.
Break-even tells you what the month requires
The revenue needed to cover all fixed costs before you earn anything. Knowing it converts a vague sense of pressure into a specific target.
It also makes decisions easier: whether you can afford a hire, a lease or a vehicle becomes a calculation rather than a judgement.
Cash position tells you how long you have
Money in the bank, plus what is genuinely coming in, less what must go out. Weekly, not monthly. Profit and cash are different, and businesses close while profitable.
Keep records that support all four from the first month, since reconstructing them later is expensive and unreliable. Tax record requirements are published by the South African Revenue Service, and free financial management training is available through the Small Enterprise Development and Finance Agency.
Frequently asked questions
Which numbers matter most in a small business?
Gross margin, debtor days, break-even revenue and cash position. Together they explain most of what is happening.
What does gross margin tell me?
Whether you are charging enough. It is where underpricing shows up first, and it should be tracked per product or job.
Why are debtor days so important?
Because the number moves before revenue does, giving weeks of warning that cash pressure is coming.
How often should I check these?
Cash position weekly. The others monthly. Annual review is too late to act on anything.
Do I need an accountant to do this?
No. These four are arithmetic, though an accountant is worth having for tax and statutory statements.
Further reading
Originally published in November 2018. Updated September 2026 into guidance on the four numbers that explain what a business is actually doing.
