Sinking funds UK: how to save for annual bills, Christmas and the car

What a sinking fund is

Most budgets cope well with rent, energy and the food shop, because they come round every month. What breaks them is the bill that turns up once a year: £540 of car insurance in March, the MOT in June, Christmas in December. Paid from one month's money, each one feels like an emergency, and it often goes on a credit card.

A sinking fund spreads that cost out. If the car insurance is £540 and it renews in 9 months, putting £60 aside each month means the money is there on the day. You give each cost its own pot, or keep one pot and track how much of it belongs to each cost.

It is not the same as an emergency fund. An emergency fund is for things you cannot predict, such as losing your job or a sudden repair. A sinking fund is for things you can: you know roughly what they cost and when. Keeping the two apart stops the Christmas money being spent on a broken washing machine, and the other way round.

Common UK sinking funds

Go through last year's bank statements and pick out anything that was not a normal monthly bill. These are the usual ones:

• The car. Insurance renewal, servicing, tyres and the MOT. In Great Britain a car needs its first MOT by the third anniversary of its registration and then one every year, and the most a test centre can charge for a car is £54.85. Repairs it finds can cost far more, so many people save for the MOT and service together.
• Vehicle tax. You can pay it monthly by Direct Debit, but GOV.UK adds a 5% surcharge if you do. Saving for it and paying once a year avoids that.
• The TV licence. A colour licence costs £180 a year: £15 a month in a sinking fund.
• Christmas and birthdays. Gifts, food, travel and the extras. The Christmas savings calculator works out the amount per payday to have it all ready by Christmas Eve.
• Holidays. Including spending money and any travel insurance, not just the booking.
• Home repairs and replacements. The boiler service, a new washing machine, decorating, or the garden fence after a storm.
• Yearly subscriptions and memberships. Breakdown cover, software, streaming paid yearly, gym or club fees, and professional memberships.
• Council tax gaps. Council tax is usually split into 10 monthly payments, so most years have two months with nothing to pay, often February and March. That is fine if you budget for 10 payments; if you budget as if it were 12, the two free months are a good time to top up your pots. You can also ask your council about spreading it over 12 months.
• Children and pets. School uniform and shoes before September, school trips, vet bills and pet insurance excesses.
• Glasses and the dentist. Small on their own, but easy to forget.

How to work out the amount

For each cost, divide what it will be by the number of months until it is due:

• Car insurance of £540, renewing in 9 months: £540 / 9 = £60 a month.
• MOT and service of £300, due in 6 months: £300 / 6 = £50 a month.
• Christmas of £600, 12 months away: £600 / 12 = £50 a month.

Add them up for your total. In the calculator's example, five goals come to £195 a month.

Starting late is normal. If a bill is close, the monthly amount for it will be high at first. Once it is paid, the next year's pot only needs the cost divided by 12: the £540 insurance needs £45 a month after this renewal, not £60. A few tips:

• Round up to the next whole pound, and add a little for prices going up at renewal.
• Use last year's bill if you do not know this year's yet, then adjust when the renewal quote arrives.
• If the total is too much, start with the costs that would otherwise go on a credit card, and add the rest as you can.
• Make it automatic with a standing order on payday, so the money moves before you can spend it.

Paid weekly or every 4 weeks

Sinking funds are easiest to think about in months, but you can save them from any pay pattern. There are 52 weekly paydays and 13 four-weekly paydays in a normal year, so:

• Weekly: the monthly total x 12 / 52. £195 a month is £45 a week.
• Every 4 weeks: the monthly total x 12 / 13. £195 a month is £180 every 4 weeks.

The guide to budgeting on weekly or 4-weekly pay explains why months and paydays do not line up, and which months of 2027 bring an extra payday.

Where to keep the money

Keep sinking fund money away from the account your debit card spends from, so it does not quietly get used for everyday things. Common choices:

• An easy-access savings account that lets you take money out without notice or a penalty, so it is there when the bill is due. Avoid fixed-term or notice accounts for money you will need within the year.
• Savings pots or spaces in your banking app. Many let you name each pot ("Car", "Christmas") and move money on payday automatically.
• One savings account and a tracker. Keep all the money together and note how much of it belongs to each goal, in a notebook or spreadsheet.

Check that the provider is a UK-authorised bank, building society or credit union. Money held with one is protected by the Financial Services Compensation Scheme (FSCS) up to £120,000 per person, per authorised firm, since 1 December 2025. Some brands share one banking licence and count as a single firm.

The UK Budget by Payday Planner has up to 10 set-aside pots with the amount for each payday, and the Simple UK Monthly Budget Planner has sinking fund lines in a one-page monthly budget.

Sources

Every UK figure and rule on this page was checked on 8 November 2026.

• GOV.UK: Getting an MOT
• GOV.UK: MOT test fees
• GOV.UK: Pay vehicle tax by Direct Debit
• GOV.UK: TV Licence
• GOV.UK: Council Tax, paying your bill
• FSCS: Deposit protection limit

Planning tool, not financial advice. This guide explains a common way of saving for known costs in plain English. Prices and your own circumstances differ, so check your own bills and renewal quotes.