Most budgets fail for the same reason: they’re built around what you hope to spend, not what you actually spend. A budget you can keep starts from the money that really reaches you and the costs that really come out.

This one takes about half an hour the first time, and ten minutes each month after that.

Step 1: Start with what lands, not what you earn

Use your net pay, the figure after PAYE, NAPSA, NHIMA and any deductions your employer makes, such as union dues, insurance or a salary-backed repayment. That’s the amount you actually have to work with.

If your pay changes from month to month, because of overtime, commission or a side business, use your lowest month from the last three. A budget built on a good month will break in a bad one.

Step 2: List what can’t move

These are the costs that come out whether you plan for them or not:

  • rent or a mortgage;
  • ZESCO units and water;
  • transport to work: bus fare, fuel or a lift you pay for;
  • school fees, if they’re paid monthly;
  • any repayments you’ve already committed to;
  • money you regularly send to family, if it’s a fixed amount.

Add them up. For a lot of people this is already more than half their net pay, and seeing the figure is the point of the exercise.

Step 3: Food and household basics

Look at what you actually spent on mealie meal, cooking oil, groceries, charcoal or gas, and airtime and data last month. Mobile money statements help here, because most of these payments now go through MTN MoMo, Airtel Money or a bank app.

Use the real number, even if it’s higher than you’d like. You can work on lowering it later. A budget that pretends food costs less than it does won’t last two weeks.

Step 4: Put money aside for the costs that come later

Some costs don’t come every month, but they always come: school fees at the start of each term, uniforms in January, a funeral contribution, road tax and insurance, Christmas.

Add these up for the year, divide by 12, and set that amount aside every month. Planning for annual costs goes through how to do this.

If you belong to a chilimba, count your monthly contribution here too. It’s savings with a payout date, and it should be treated like a fixed commitment.

Step 5: What’s left is yours to decide

Whatever remains after steps 2 to 4 is the money for everything else: eating out, clothes, entertainment, gifts, and anything you’d like to save.

If this number is negative, the budget has done its job. It’s shown you the gap before the month runs out instead of halfway through it. The options are the same for everyone: cut a cost, earn more, or plan which costs will move to next month. Covering a gap that comes back every month with credit makes the gap bigger.

Make it easy to follow

A few things make the difference between a budget on paper and a budget you keep:

  • Move money on payday. Send the savings and future-cost money to a separate wallet or account the day your salary lands, before you spend anything.
  • Keep the spending money where you can see it. Some people keep their day-to-day money in one mobile money wallet and everything else in the bank, so the wallet balance shows how much is left for the month.
  • Check weekly, not monthly. Five minutes on a Sunday to see where the money went is enough to change course before it’s too late.
  • Leave a small buffer. K100 to K200 a month that isn’t assigned to anything catches the small surprises that would otherwise break the plan.

When to adjust

Change the budget whenever something real changes: a raise, a new rent, a child starting school, a new repayment. Redo steps 1 to 5 with the new figures. It’s meant to be a working document, not something you set once and forget.