Guides › UK money · Updated October 2026

Sinking funds explained: how to save for irregular bills in the UK

Not financial advice. This guide is general information for people in the UK, checked against official sources at the time of writing. Rules, rates and benefits change, so check the linked sources and consider free, impartial help from MoneyHelper if you are unsure. Links marked as affiliate links may earn us a small commission at no cost to you.

If your budget keeps getting knocked off course by bills you "forgot" were coming, such as the car MOT, a birthday, the TV licence or Christmas, sinking funds are the fix. They are one of the simplest budgeting tools there is, and they work on any income. Here is how they work and how to set them up in the UK.

What is a sinking fund?

A sinking fund is money you put aside a little at a time for a known, future cost. Instead of finding £300 in one go when the car insurance renews, you save £25 a month for twelve months, so the money is already there when the bill arrives.

The key word is known. Sinking funds are for things you can see coming, even if you do not know the exact date or amount. That is what makes them different from an emergency fund.

Sinking fund vs emergency fund

	Sinking fund	Emergency fund
What it is for	Predictable costs: Christmas, birthdays, MOT, insurance, school uniforms	Genuine surprises: boiler breakdown, job loss, urgent vet bill
Do you know it is coming?	Yes	No
How you use it	Spend it on schedule, then start again	Leave it alone unless there is a real emergency

Many people raid their emergency fund for Christmas or a holiday, then have nothing left when something really does go wrong. Sinking funds stop that by giving each predictable cost its own pot. Our guide to building an emergency fund on a low income covers the other half of the picture.

Why sinking funds work

They turn big bills into small ones. A large annual cost becomes a manageable monthly amount.
They stop "surprise" debt. Without a sinking fund, irregular bills often end up on a credit card, an overdraft or buy now pay later.
They make your budget honest. A monthly budget that ignores annual costs looks fine until the month the bill lands.
They remove guilt. When you spend from a sinking fund, you are spending money you planned to spend.

Common sinking funds for UK households

Not everyone needs all of these. Pick the ones that apply to you:

Christmas and gifts: presents, food, cards, wrapping and travel. See our guide on how to save for Christmas in the UK.
Birthdays and celebrations: family birthdays, weddings, hen and stag dos, baby showers.
Car costs: MOT, servicing, tyres, insurance renewal, road tax (if you pay annually), breakdown cover.
Home: annual home insurance, boiler service, replacing appliances, small repairs.
TV licence: a colour licence costs £180 a year from 1 April 2026, according to GOV.UK, if you need one. You can pay it in instalments, but some people prefer to save for it.
Children: school uniforms, shoes, school trips, holiday clubs, after-school activities.
Pets: annual vaccinations, insurance excess, flea and worm treatments.
Health: dental check-ups, glasses or contact lenses, prescriptions (in England, a prescription prepayment certificate can cut costs if you need a lot of items).
Subscriptions you pay yearly: software, memberships, Amazon Prime or similar.
Holidays and days out: including summer holidays when childcare costs can rise.

How to set up sinking funds in five steps

1. List your irregular costs

Go through the last 12 months of bank statements and pick out every cost that does not happen every month. Add anything you know is coming in the next year. This is often an eye-opener: irregular costs can add up to more than people expect.

2. Estimate the amount and the date

For each item, write down roughly how much it will cost and when it is due. Use last year's figure as a starting point and add a little for price rises. If you are not sure, round up.

3. Work out the monthly amount

The formula is simple:

Monthly amount = (target - what you have already saved) ÷ months until it is due

For example (illustrative figures): if your car insurance is about £420 and renews in 10 months, and you have saved nothing yet, you need to put aside £42 a month. If it is due in only 6 months, it is £70 a month, which is a good reason to start early.

Let the spreadsheet do the mathsThe Sage & Paper Savings Goal Tracker works perfectly for sinking funds. Add each fund as a goal with a target and a date, log what you put in, and it shows how much you need to save each month and how close you are. £3.50, instant download.
Get the Savings Goal Tracker

4. Decide where to keep the money

You have a few options:

Savings pots inside your current account. Many UK banks and app-based accounts let you create several named pots. This is the easiest way to keep each fund separate.
One easy-access savings account with a simple spreadsheet tracking how much of the balance belongs to each fund.
A credit union savings account, which often has no minimum deposit and can sometimes be paid into directly from your wages or benefits.

Whatever you choose, keep the money separate from your everyday spending and easy to access, since you will be using it within the year. Money in UK-authorised banks, building societies and credit unions is protected by the FSCS up to £120,000 per person, per authorised firm.

If you get Universal Credit or other means-tested benefits, remember that savings in a sinking fund still count as capital. For Universal Credit, savings of £6,000 or less do not affect your payment, which is well above what most people hold in sinking funds.

5. Automate it

Set up standing orders for payday, one for each fund or one larger transfer that you split. If the money moves automatically, you will not have to rely on willpower.

What if you cannot afford all of them?

This is very common, especially when you are starting out. Do not try to fund everything at once. Instead:

Start with the next big one. Whatever is due soonest and would cause the most damage if you could not pay it, often insurance or Christmas.
Fund the essentials before the nice-to-haves. Car and home costs come before holidays.
Lower the targets. A cheaper Christmas or a smaller holiday budget is still a plan.
Switch to monthly payments where it is free. Some annual bills can be paid monthly at no extra cost (the TV licence, for instance). Others, especially car and home insurance, often charge more for paying monthly, so saving up and paying annually can be cheaper.
Cut regular bills to free up money. Our guide to cutting household bills can help you find the extra.

A worked example (illustrative)

Sinking fund	Target	Months to go	Monthly saving
Christmas	£360	12	£30
Car MOT and service	£240	8	£30
Birthdays	£180	12	£15
School uniforms	£100	10	£10
Total	£880		£85

These numbers are examples only. The point is that £880 of bills spread through the year becomes £85 a month you can plan for, rather than a series of shocks.

Make sinking funds part of your monthly budget

Sinking fund payments should be a line in your monthly budget, just like rent or council tax. When you plan your month, the transfers come out first. If you use the 50/30/20 approach from our monthly budget guide, essential sinking funds (car, home) can sit in "needs", and fun ones (holidays, gifts) in "wants".

The Sage & Paper Monthly Budget Tracker has a Savings category you can use for your sinking fund transfers, so you can see them alongside the rest of your spending.

Review them once a year

Prices change, and so does life. Once a year, check each fund: did you save enough, was the target right, and is there anything new to add? Adjust the monthly amounts and keep going. After a year or two, irregular bills stop being stressful, because the money is always there waiting.

More guides

Sage & Paper printables and spreadsheetsSimple, low-cost budgeting tools for UK households, from £3.50.
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