By Gabriele Denaro · Published 20 September 2026 · Updated 6 October 2026
A sinking fund is money set aside every month for a specific expense that you know is coming but is not due yet. If car insurance costs €600 a year, setting aside €50 a month means the bill arrives as a withdrawal from money already saved instead of a shock in one month.
Divide the cost by the months until it is due. A €1,200 holiday in eight months is €150 a month. A €900 laptop you expect to replace in 18 months is €50 a month. Add them together to see what your planned expenses really cost you each month, and treat that sum like a fixed bill.
The difference from an emergency fund is the word "known". An emergency fund covers the unplanned, such as a job loss or a broken boiler, and is sized as a buffer against uncertainty. A sinking fund covers the planned and is sized to an exact amount and date. Mixing them either drains the emergency fund with predictable bills or leaves a planned expense competing for money that should stay untouchable.
Think of the costs that are certain but irregular: annual insurance, car tax and servicing, a local property or waste tax, gifts and celebrations, a trip, the replacement of a device or an appliance. Looking back over last year's statements usually turns up a few you forgot.
A dedicated pot or account makes it easy to see, but it is not required. A spreadsheet line or a note beside a liquid account, such as "of this total, €300 is earmarked for the car insurance in March", is enough. What matters is that the money is set aside, mentally or literally, before the bill arrives.
General educational information, not personal financial, tax or legal advice. It may be incomplete or out of date. Terms of use.