Sinking funds
That $400 surprise wasn't a surprise. It was a missing sinking fund.
Car repairs, the vet, the holidays: you don't know when, but you know they're coming. How sinking funds work, with per-paycheck examples.
· Example numbers · not financial advice
Not an emergency, just irregular
An emergency fund is for what you can't predict: a job loss, a medical bill. A sinking fund is for what you know is coming, just not exactly when: tires, the dentist, the vet, an annual subscription, holiday gifts.
When those predictable costs come out of the emergency fund, it keeps getting drained by things that were never emergencies. When they come out of a normal paycheck, that paycheck comes up short. Either way it feels like a surprise.
The formula
Pick the amount and the date. Count the paydays between now and then. Divide. A $400 car repair you expect sometime in the next year, on a biweekly paycheck, is $400 ÷ 26 = $15.38 a paycheck. A $300 annual bill is $11.54.
Counting paydays matters more than counting months. Paid every other Friday with the first one on November 6, 2026, you have four paydays before Christmas: Nov 6, Nov 20, Dec 4 and Dec 18. A $600 holiday budget is $150 from each.
Paid every other Friday? Divide by 26 and follow the biweekly paycheck budget method; the third paycheck months are a good time to top funds up. A 30-day no-spend challenge can kickstart a new fund, and the sinking fund calculator counts your paydays left.
Where to keep them
Keep sinking funds out of your spending account so they don't blend into everyday money. Some banks let you create named savings buckets; otherwise one savings account and a simple list of balances works fine.
- Car (repairs, tires, registration)
- Health (copays, dental, glasses)
- Pets (vet, food in bulk)
- Holidays and birthdays
- Annual bills (subscriptions, insurance paid yearly)
If the number feels too big
Shrink the goal, not the plan. A $300 holiday fund you actually fill beats a $600 one you skip. You can also start late and catch up with the two extra paychecks a biweekly schedule brings each year.
Start with one
You don't need ten funds on day one. Pick the predictable cost that surprised you most last year, set a goal and a date, and start with the next paycheck. When that fund feels automatic, add another.
Review the list a couple of times a year. Car insurance went up? Adjust the per-paycheck number. A fund is full and the expense hasn't come yet? Keep it; it's doing its job.
A worked year
Imagine three funds on a biweekly paycheck: car repairs at $400 a year ($15.38 a paycheck), an annual subscription bundle at $300 ($11.54) and pet costs at $520 ($20 a paycheck). That's $46.92 every payday, about $1,220 over the year.
When the $380 brake job shows up in July, it's paid from the car fund. When the subscription renews in March, the money is already there. Nothing touches the emergency fund, and no paycheck comes up short. That quiet year is the whole point of sinking funds.
The takeaway
Two envelopes, two jobs: the emergency fund waits for the unpredictable; sinking funds pay for the predictable.
FAQ
What's the difference between a sinking fund and an emergency fund?
A sinking fund saves for a known, expected cost (holidays, car repairs, annual bills). An emergency fund covers the unexpected, like a job loss or medical bill.
How much should I put in a sinking fund?
Divide the expected cost by the number of paydays before you need it. A $400 cost over a year of biweekly paychecks is $15.38 per paycheck.
Where should I keep sinking funds?
Somewhere separate from your spending account, such as a savings account with named buckets or one account with a simple tracking list.
Educational content, not financial, tax or legal advice. All numbers are hypothetical examples with the assumptions stated; your lender, card issuer, employer or tax situation may differ.