What Are Sinking Funds and How Do They Work?
Saving ahead for expenses you already know are coming.
A sinking fund is money you set aside gradually for a specific, expected expense — like car insurance, holidays or a new laptop. It turns large bills into small monthly amounts, so they don’t become emergencies.
Emergencies vs. predictable costs
An emergency fund covers the unexpected. A sinking fund covers what you know is coming but don’t pay every month.
Many “surprise” expenses — annual subscriptions, car maintenance, gifts — are actually predictable.
How to set one up
List expected irregular costs for the next year, with an amount and a due date for each.
Divide each amount by the months remaining. If insurance costs $600 in six months, set aside $100 a month.
Keeping them organized
Some banks let you create separate labeled savings “buckets.” A simple spreadsheet tracking one account also works.
When the bill arrives, the money is already there and your monthly budget stays intact.
Start with your three largest yearly bills. Covering just those removes most of the budget shocks people feel.
Frequently asked questions
How many sinking funds should I have?
As many as you can track easily. Many people start with three to five.
Can I borrow from one for another?
You can, but plan to refill it so the original expense is still covered.
This guide explains a general concept; it isn’t a recommendation to buy, sell or borrow. For decisions about your own money, consider speaking with a licensed financial professional.
