August 25, 2026 · 5 min read
Most small businesses do not struggle to sell. They struggle to keep what they earn. Money comes in through the day and goes out again on stock, transport, fuel, airtime, rent and a hundred small things. When no one writes those costs down, the month ends with a full counter and an empty answer to the question: what did we keep?
Here is a simple way to take control, no accounting degree required.
The golden rule: record on the day
Expense memory is worse than sales memory. A sale has a customer attached to it, but a fuel top-up or a packet of packaging is gone by evening. Record each expense the moment it happens — even a single line: date, amount, what it was for, who paid. Five seconds at the door beats thirty minutes of guessing at the end of the month.
Separate business money from personal money
Money flows get tangled when shop money and home money share one pile. Open a separate account or wallet for the business and pay business costs only from it. It sounds strict, but it is the single fastest way to know if the business actually makes money.
Split fixed costs from daily costs
Rent has a due date; transport does not. Sort expenses into two lists: fixed costs you can expect every month, and daily variable costs. When you know the fixed number by heart, you know the minimum the business must earn before the first franc of profit.
Notice the small leaks
After a month of honest recording, look at the list. The surprise is almost never a big bill — it is ten small ones that repeat. Airtime, fuel, “small change” for helpers. Once small leaks are visible, they are easy to manage. Invisible, they never end.
Use a tool that does the adding for you
A notebook works, but a tool that adds, sorts and reports for you makes the habit stick. With SmartCunga you record an expense in seconds, in the same place as your sales and stock. At any moment you can see the month’s spend, the categories, and the profit that is left. Built for Rwandan SMEs, in English and Kinyarwanda, working even offline.
Profit is not what you sell. It is what you keep. Recording expenses is the first step to keeping it.