How to Plan for Irregular Expenses

Many budgets look fine on paper until a car service, an annual insurance renewal or a round of birthday presents comes along. These costs aren’t true emergencies, because you know they’re coming, but they arrive at awkward intervals. Planning for them in advance turns budget-breaking surprises into routine payments.

Spot the Costs That Don’t Come Monthly

Start by making a list of every expense that appears less often than once a month. Go through the last twelve months of bank and card statements, and flip through your calendar to jog your memory. Common examples include:

• Vehicle servicing, repairs, registration and insurance
• Annual subscriptions, memberships and software licences
• Home maintenance, appliance replacement and seasonal heating costs
• Medical, dental and eye care not covered elsewhere
• Birthdays, festivals and other gift-giving occasions
• School costs, uniforms and children’s activities
• Holidays and travel
• Pet care such as vaccinations and grooming

Don’t worry about getting everything perfect on the first try. You can add items as you remember them.

Work Out What Each One Costs

1. Next to each item, write how much it cost last time or a realistic estimate.
2. Note how often it occurs, such as yearly, every six months or every few years.
3. Convert every cost into an annual figure. For example, a cost that comes every two years is half that amount per year.
4. Add up the annual figures to get your total for irregular spending.
5. Divide the total by twelve. That’s how much you need to set aside each month.

The monthly figure may be surprisingly large. That’s useful information, not bad news: these costs were always there, and now you can see them clearly.

Set Up Sinking Funds

A sinking fund is money you save gradually for a specific, expected expense. Instead of scrambling when a bill lands, you simply spend money you’ve already put aside.

• One account or several: Some people use a single separate savings account and track each category on a spreadsheet. Others prefer multiple accounts or savings pots if their bank offers them.
• Automate it: Schedule a monthly transfer on payday so the money moves before you’re tempted to spend it.
• Label clearly: Naming each fund, such as “car” or “gifts”, makes it obvious what the money is for.

Keep these funds separate from your emergency savings. An emergency fund covers the unexpected, while sinking funds cover the expected-but-irregular.

Fit It Into Your Budget

If the monthly amount doesn’t fit straight away, prioritise essentials like insurance and car costs first, then build up the rest over time. Look for ways to lower some irregular costs, such as shopping around before renewals or setting spending limits for gifts. When a sinking fund pays for a bill, review whether your estimate was accurate and adjust next year’s amount.

Making It Stick

Review your list once or twice a year, as prices and priorities change. Keep a simple calendar of when big bills are due so nothing catches you off guard. After a few months, you’ll notice the difference: bills that once caused stress become just another planned payment.