List everything that is not monthly
- Insurance excesses and annual premiums.
- Vehicle licensing, servicing and tyres.
- School fees, uniforms and stationery.
- Festive season spending and gifts.
- Professional memberships and software renewals.
- Medical and dental check-ups.
Convert to a monthly figure
Add the annual total and divide by twelve. If your irregular costs total 30,000 a year, your real monthly budget needs a 2,500 line for them. Ignoring this is the single most common reason a balanced-looking budget fails.
Use a sinking fund
Keep the money in a separate savings account and transfer the monthly amount automatically on payday. When the bill arrives, the money is already there and nothing is disrupted.
Order the year
- Write each cost against the month it falls due.
- Identify the two heaviest months.
- Start the fund now so those months are covered by the time they arrive.
- Review the list every twelve months and adjust for price increases.
Starting mid-year
If a cost is due in four months, divide by four rather than twelve. The contribution is higher, but you know the real number instead of being surprised by it.