Sinking Funds Explained

Ever had a month where everything is fine… until the car registration, a wedding gift and the annual insurance bill all show up at once? That’s not bad luck. Those expenses were always coming — they just weren’t in the budget.

Sinking funds fix that. You save a little every month for the things you know are coming, so when the bill arrives, the money is already sitting there.

How a sinking fund works

1. List the irregular expenses you know are coming in the next 12 months.
2. Estimate the cost of each one.
3. Divide by the number of months until you need it.
4. Save that amount every month in a separate place.

Example

Christmas costs your family about $900. It’s January, so you have 11 months.

$900 ÷ 11 = about $82 a month.

When December comes, you shop with cash you already have — no credit card hangover in January.

The most common sinking fund categories

Sinking fund	What it covers
Holidays & gifts	Christmas, birthdays, Mother’s/Father’s Day, weddings
Car	Registration, insurance, tires, servicing, repairs
Home	Repairs, appliances, yard, maintenance
Medical	Dentist, glasses, copays, prescriptions
Kids & school	Uniforms, supplies, excursions, sports fees
Annual bills	Subscriptions, memberships, insurance paid yearly
Travel	Holidays, trips to see family
Pets	Vet visits, vaccines, grooming
Clothing	Seasonal clothes and shoes

You don’t need all of these. Start with the three that hurt most last year.

How much to save: a simple worksheet

For each fund, write:

• Goal amount: what it will cost
• Due date: when you need it
• Months left: count them
• Monthly amount: goal ÷ months left

Then add up all the monthly amounts. If the total is more than you can afford, that’s useful information — trim the goals (a cheaper Christmas, a smaller trip) or stretch the timeline.

Our savings goal thermometer works great here. Print one per fund, write the goal at the top and color it in as you save.

Where to keep the money

The key is keeping it out of your everyday account so it doesn’t get spent by accident. Options:

• One separate savings account with a simple tracker (paper or spreadsheet) showing how much belongs to each fund.
• Banks with labeled “buckets” or sub-accounts — many online banks offer this free.
• Cash envelopes for small funds like gifts or clothing (see our cash stuffing guide).

Sinking funds vs. an emergency fund

They work together, but they’re not the same:

• Sinking fund: predictable. Christmas will happen.
• Emergency fund: unpredictable. Job loss, a sudden medical bill, a broken-down fridge you didn’t see coming.

If you only have money for one, start with a small emergency fund — even $500 — then add sinking funds.

Tips that make sinking funds stick

• Automate it. Schedule transfers on payday so you never “decide” to save.
• Round up. $82 becomes $85. Small cushions help when prices rise.
• Review every quarter. Prices change; adjust your amounts.
• Use windfalls. Tax refund? Top up the funds that are behind.
• Don’t raid one fund for another unless you have a plan to pay it back.