Car repairs. Christmas. A new pair of glasses. The annual insurance renewal you somehow forget about every single year.
They can feel like unexpected expenses when they arrive — but many of them aren't really unexpected. We just don't pay them every month.
That's where sinking funds can help.
A sinking fund is simply money you put aside gradually for a specific future expense. Instead of finding £600 for Christmas in December or putting a £500 car repair on a credit card, you build up a little pot over time.
And you don't need 12 different pots just because this list has 12.
Start with the expenses that regularly catch you out. For one household that might be the car and Christmas. For another, it could be school costs, pets and annual insurance.
How much should you put in each sinking fund?
If you know roughly what something will cost and when you'll need the money, a simple starting point is:
Expected cost ÷ months until you need it = monthly amount to save
So if you want £600 for Christmas and have 10 months to save:
£600 ÷ 10 = £60 a month
You can add a little extra if you want some breathing room, but don't worry about getting every pot perfectly calculated from day one.
Below are 12 sinking fund ideas for UK budgets, with examples of what each one could cover and how you might work out a target.
1) Emergency Fund (starter buffer)
- What it covers: 1–3 months of essentials (rent/mortgage, utilities, food, transport, minimum debt payments).
- Target: starter £500–£1,000, then build toward 1–3 months.
- Why: stops you reaching for credit when life happens (car repair, boiler fault, missed shifts).
Example: £1,200 target over 12 months → £100/mo.
2) Car Costs
- What it covers: MOT, servicing, tyres, repairs, road tax; (optionally) insurance excess.
- Target: Add your typical annual spend (MOT + service + tyres) + a small repair buffer.
- Example: £500 MOT+service + £300 tyres + £200 buffer = £1,000 → £1,000 ÷ 12 = £84/mo.
3) Home Maintenance
- What it covers: Boiler service, small repairs, DIY tools/materials, white goods breakdowns.
- Target: 1–2% of property value per year (owners), or flat £50–£100/mo in a rental.
- Example: £60/mo as a starting point.
4) Annual Bills & Insurance
- What it covers: TV licence, contents/home insurance, car insurance (if you don’t keep it in “Car”), breakdown cover, Amazon/Costco, software subs paid annually.
- Target: Sum your annual premiums + add 10% buffer.
- Pro tip: Shop insurance 3–4 weeks before renewal.
5) Gifts & Christmas
- What it covers: Birthdays, wedding gifts, Christmas (food + presents), Mother’s/Father’s Day.
- Target: Decide total yearly gifting, divide by 12, add 10%.
- Example: £720/yr → £60/mo; 10% buffer = £66/mo.
6) Travel / Holidays
- What it covers: Flights, trains/fuel, hotels, spending money, passports, travel insurance.
- Target: Pick the next trip budget, divide by months to go, add 10%.
- Example: £1,200 summer trip in 8 months → £1,200 ÷ 8 = £150 + buffer ≈ £165/mo.
7) Kids / School
- What it covers: Uniform, shoes, clubs, trips, birthdays, school photos, summer camps.
- Target: Look back at last year; set a clear annual number + 10%.
- Example: £600/yr → £55/mo with buffer.
8) Health / Dental / Glasses
- What it covers: Prescriptions, dentist/hygienist, glasses/contacts, physio, small private fees.
- Target: One check-up + hygienist + expected prescriptions + 10%.
- Example: £360/yr → £33/mo.
9) Pets
- What it covers: Insurance premiums/excess, vaccinations, flea/worming, food, boarding.
- Target: Add insurance (or set a self-insure pot), routine care + 10%.
- Example: £720/yr → £66/mo.
10) Tech & Appliances
- What it covers: Phone, laptop, tablets, headphones, washing machine, fridge repairs/replacements.
- Target: Plan for one major replacement every 3–5 years + small repairs.
- Example: £600 phone every 3 years → £17/mo + £10/mo buffer = £27/mo.
11) Clothing & Shoes
- What it covers: Seasonals, workwear, school shoes, coats, trainers.
- Target: Set a realistic annual cap; divide by 12.
- Example: £480/yr → £40/mo.
12) Fun & Experiences
- What it covers: Meals out, gigs, mini-breaks, kids’ treats—guilt-free spending.
- Target: Whatever you can afford after the essentials and other pots are funded.
- Pro tip: Funding Fun last (after Bills → Buffer → Pots) keeps life balanced and sustainable.
Putting it together (example split)
Let’s say you can put £600/month into Pots:
| Pot | Target / mo |
|---|---|
| Emergency Fund (starter) | £100 |
| Car Costs | £84 |
| Home Maintenance | £60 |
| Annual Bills/Insurance | £40 |
| Gifts & Christmas | £66 |
| Travel/Holidays | £165 |
| Kids/School | £55 |
| Health/Dental/Glasses | £33 |
| Pets | £66 |
| Tech & Appliances | £27 |
| Clothing & Shoes | £40 |
| Fun & Experiences | whatever’s left |
Use the Splitter to nudge these amounts automatically from one payday amount.
How to run this with the Savings Splitter
- Enter payday amount (top-left).
- Name pots (or use the defaults).
- Set each pot’s £ target or % (your choice).
- The sheet shows the exact amounts to transfer—copy them into your banking app as standing orders dated payday +1.
- Review quarterly; increase/decrease pots as life changes.
Free tool
Work out a useful emergency-fund target and see how long it could take to build your buffer at your current savings rate.
→ Use the Free Emergency Fund CalculatorFAQs
Q: I can’t afford all 12. Where do I start?
A: Emergency Fund, Car (if you drive), Annual Bills, and Gifts/Christmas. Add the rest as your budget loosens.
Q: Should debt come before sinking funds?
A: Minimum payments + a small starter Emergency Fund first. Then keep modest pots for predictable costs so you don’t put them back on credit. Throw the rest at your highest-priority debt.
Q: Can I use one big “Annual Costs” pot?
A: Yes—one pot is better than none. Named pots simply give more clarity.
Next reads
Savings Waterfall (UK): the simple order to fund pots without guesswork.
Payday Flow: Bills → Buffer → Pots → Fun, automated in 10 minutes.
Best Places to Keep Cash (UK): easy-access vs notice vs fixed—when to use each.
Bottom line: when you give irregular costs a named pot and fund them monthly, you stop “surprise” spend from wrecking your budget. Set it once, automate on payday+1, and let the dashboards do the heavy lifting.
