Sinking funds
A sinking fund is a small, named monthly savings amount for a specific upcoming expense — car repairs, Christmas, an annual insurance premium — so that when the bill lands you already have the money. This page seeds the Savings section with common sinking-fund rows so you can start filling in amounts instead of thinking up categories.
Income
$4,500- ✓ 100%
- 91%
- 95%
- ✓ 100%
- ✓ 100%
- ✓ 100%
- ✓ 120%
- 84%
- ✓ 127%
- 79%
- 60%
- ✓ 100%
- 71%
- 56%
- 0%
- 0%
- 0%
- 0%
- 0%
- 0%
- ✓ 100%
- ✓ 100%
- ✓ 100%
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Why they work
Most people's budgets don't fail on rent or groceries — they fail on the lumpy stuff that only shows up two or three times a year. Sinking funds break those lumps into monthly slices, so the pattern of spending matches the pattern of saving. When December arrives, the gift money is already there.
How to size one
- Write down what the expense costs in total (e.g. Christmas = $600).
- Divide by the number of months until it happens (12 → $50/month).
- Put that amount in the Planned column of the sinking fund row.
- When the expense hits, you're spending your own money, not borrowing.
Where to keep the money
Some people track sinking funds as separate savings accounts, some in named sub-accounts inside one high-yield savings account, some purely on a spreadsheet with the money pooled. The tracking is what matters — if the number on paper is protected from the rest of the budget, the mechanism works.
Common sinking-fund categories
Car repairs, tires, home maintenance, medical and dental, insurance renewals, Christmas and gifts, birthdays, travel and holidays, technology replacement, kids' activities, pet care, tax bills.
- Zero-based budgeting— The overall method sinking funds fit inside
- Cash envelope system— A related approach for discretionary categories
Common questions
›What is a sinking fund?
A sinking fund is a pot of money you build up in small monthly amounts for a known upcoming expense — car repairs, Christmas gifts, an annual insurance renewal — so that when the bill lands you already have the cash set aside.
›How is a sinking fund different from an emergency fund?
An emergency fund covers unknown, urgent expenses (a job loss, an ER visit). Sinking funds cover known, scheduled expenses. Both live in savings; they just have different jobs.
›How many sinking funds should I have?
As many as you have irregular expenses you can name. Common ones: car maintenance, holidays, gifts, travel, insurance renewals, home repairs, dental. Start with two or three and add more as they come up.
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