What Is a Sinking Fund? How to Save for Big Expenses

Have you ever opened your budget at the start of the month and been fine, until a car repair, a holiday or Christmas showed up and ruined everything? These costs feel like surprises, but most of them are not. You knew they were coming. You just did not have a plan for them. That plan is called a sinking fund.

What is a sinking fund?

A sinking fund is money you set aside in small amounts, month after month, for one specific planned expense. Instead of facing a big bill all at once, you spread it over many months. When the bill arrives, the money is already waiting.

A simple example

Your car insurance is due in 6 months and costs 300. If you put aside 50 each month, you will have the full 300 when the bill comes. No stress, no credit card, no dipping into your grocery money.

The formula is easy: target amount ÷ months left = monthly amount.

More examples

• Christmas: 480 needed in 8 months means 60 a month.
• Holiday: 1,200 needed in 10 months means 120 a month.
• Car repairs: 600 a year means 50 a month.
• Birthdays and gifts: 360 a year means 30 a month.

Sinking fund or emergency fund?

They sound similar, but they do different jobs. A sinking fund is for things you know will happen, like insurance, gifts and trips. An emergency fund is for things you cannot predict, like a sudden job loss or an unexpected medical bill. Many people keep both.

Sinking fund ideas to start with

• Christmas and gifts
• Birthdays
• Holidays and travel
• Car maintenance and insurance
• Home repairs
• Medical and dental costs
• Pet costs
• Annual subscriptions
• A new phone or laptop

How to start in 5 steps

1. List what is coming. Look back over the last 12 months. What costs surprised you?
2. Pick a target for each fund. Estimate the amount and the date it is due.
3. Work out the monthly amount. Divide the target by the months left. You can try it with my free Sinking Fund Calculator.
4. Save it every month. Move the money into a separate pot, a savings account or an envelope, as soon as you get paid.
5. Write it down. Track what you add and what you spend, so you always know where you stand.

If the total is more than you can afford, do not give up. Start with one or two funds, push a date back, or lower a target.

Simple supplies for a paper sinking fund system

You can keep it all digital, but many people like to see their money. These simple tools help:

• Glass jars with lids to see your savings grow if you save in cash.
• Cash envelopes for each fund.
• Label stickers to name each jar or envelope.
• A 3-ring binder to keep your printed pages together.
• Fine-tip pens for neat tracking.

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Want a ready-made tracker?

I made a Sinking Funds Tracker printable with 29 undated pages: fund ideas, an annual expenses planner, eight fund tracker pages with 12-month tables, Christmas, gifts, travel, car and home funds, a monthly transfer log and a year review. Start in any month and print as many copies as you like.

Get the Sinking Funds Tracker on Gumroad →

Building a full budget too? Read How to Make a Monthly Budget or try my free Budget Calculator.