Sinking Funds Calculator

A sinking fund is money you put aside a little at a time for a cost you know is coming. Add each one with a target and a date, and see a steady amount for each month or each payday. Rough numbers are fine.

1. How often you’re paid
2. Your sinking funds

Give a target and the date you’ll need it. No date? We’ll treat it as a yearly cost and divide by 12.

Quick add:

Your set-aside

Your data

Saved automatically in this browser only. Export a backup file to move it to another device.

How to use this sinking funds calculator (UK)

A sinking fund is money you put aside a little at a time for a cost you know is coming, such as car tax, the MOT, the TV licence or Christmas. This free sinking funds calculator for the UK takes each cost with a target and a date and shows a steady amount for each month or each payday. It runs in your browser with no accounts, and rough numbers are fine.

Step by step

  1. Choose how to see your amounts: for each month, or for each four-weekly, fortnightly or weekly payday. Per-payday amounts count the paydays left before each date.
  2. Add a sinking fund with the quick-add buttons (Christmas, car insurance, MOT, car tax, TV licence, birthdays, holidays and more) or type your own name.
  3. Enter a target and the date you’ll need it. No date? The calculator treats it as a yearly cost and divides by 12. Tick “This comes round every year” for costs that repeat.
  4. Add anything already put aside (optional), and the calculator works out what’s still to put aside.
  5. Read “Your set-aside”: the amount for each fund, the paydays left and the total to set aside. Amounts are rounded up to the penny so each target is reached by its date.
  6. Already using the Payday & Bills Planner in this browser? Use “Copy from my Payday & Bills Planner” to bring your sinking funds across.

Questions

What is a sinking fund?

A sinking fund is money you put aside a little at a time for a cost you know is coming, such as an annual insurance renewal or Christmas.

What if a cost doesn’t have a date?

Leave the date blank and the calculator treats it as a yearly cost, dividing the target by 12 to give a monthly amount.

How are per-payday amounts worked out?

The calculator counts the paydays left before each date for the pay frequency you choose, then divides what’s still to put aside by that number, rounding up to the penny.

Is this financial advice?

No. It’s an organising tool for your own numbers, and every decision is yours. For free, impartial help, contact MoneyHelper, Citizens Advice or StepChange.

Related free tools

Prefer paper? Our 2027 UK Household Budget & Bill Tracker has sinking funds pages and a bills ÷ 12 page, for monthly or four-weekly pay.

Not financial advice. These tools help you organise your own numbers. For free, impartial help: MoneyHelper, Citizens Advice and StepChange.