Sinking funds: budgeting for the UK bills that blindside you
Some bills only come once a year — which is exactly why they hurt. A sinking fund turns a scary annual lump into a small, boring monthly habit. Here is the idea and the UK costs worth planning for.
What a sinking fund actually is
A sinking fund is money you set aside a little at a time for a known future cost, so that when the bill lands the cash is already there. The maths could not be simpler: take the annual cost, divide by 12, and save that much each month. A £180 bill becomes £15 a month; a £240 bill becomes £20. Nothing clever — just spreading the cost forward instead of being ambushed by it.
The UK annual costs people forget
These are the classic once-a-year (or occasional) UK bills that wreck an otherwise fine month. A few have well-defined national figures:
| Bill | Typical UK figure | Monthly set-aside |
|---|---|---|
| TV Licence (standard colour) | £180 / year | £15 |
| Car MOT (maximum test fee, car) | up to £54.85 | about £4.57 |
| Vehicle tax (VED) — standard rate* | £200 / year | about £16.67 |
*The £200 VED figure is the standard rate for most cars registered on or after 1 April 2017, from their second year of tax onwards. Vehicle tax varies a lot by car, fuel type and registration date, so always check your own V11 reminder rather than assuming.
Car, home and pet insurance, breakdown cover, boiler cover and water bills do not have a single national figure. Do not guess — take the number from your own renewal letter and divide that by 12. Christmas, birthdays and annual subscriptions deserve their own sinking funds too.
How to set them up
- List every irregular cost you can think of — annual, quarterly and seasonal.
- Find the real figure for each (last year's bill or your renewal letter is fine).
- Divide by 12 (or by however many months until it is due) to get the monthly amount.
- Move that money on payday into a separate pot or savings space, before you can spend it.
- Pay the bill from the fund when it arrives — and the shock is gone.
Sinking funds convert three or four alarming spikes a year into one small, predictable line in your monthly budget. It is the least glamorous money habit there is — and one of the most effective.
Sources: gov.uk for the TV Licence (£180 from 1 April 2026), MOT maximum fee (£54.85 for a car) and the £200 standard VED rate. General information, not financial advice.
General information, not tax or financial advice. Always confirm your own position with HMRC or a qualified adviser. This article was last checked against published gov.uk guidance on 13 July 2026. Rules and figures can change — always confirm your own position with HMRC or a qualified adviser.