Guide

Sinking funds explained: save for big costs a little at a time

Some costs are not surprises, they are just not monthly. A sinking fund turns them into a small monthly amount.

Updated 20 October 2026

What a sinking fund is

A sinking fund is a pot of money for a cost you know is coming: car insurance, a holiday, birthdays, a boiler service. You save a little every month, so the bill is already covered when it arrives.

How to work it out

Take the cost and divide it by the months until it is due.

  • Car insurance of €600 due in 12 months: €50 a month.
  • A €1,800 holiday in 9 months: €200 a month.
  • Gifts and holidays of €480 a year: €40 a month.

Keep them visible

The idea only works if you can see each pot. In Wollie each one is a savings goal with its own monthly amount, so you can see which ones are on track.

Questions

What is the difference between a sinking fund and an emergency fund?

A sinking fund is for costs you know are coming. An emergency fund is for surprises.

How many sinking funds should I have?

Start with the two or three costs that hurt most when they arrive, then add more as you get used to it.

This guide is general information, not financial advice.

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