Big-Purchase Sinking Fund Planner
Example: Target amount: 20000 $ · Months to save: 24 · Already saved: 3000 $ · Savings APY: 4 %
| Save this per month | $672 |
| Total you will contribute | $16,117 |
| Interest earned along the way | $883 |
| On track? (1/0) | 1 |
Worked example
To reach $20,000 in 24 months with $3,000 already saved in a 4% account, you need to set aside about $660 per month. Interest quietly chips in a few hundred dollars, so you contribute slightly less than the full gap yourself and arrive debt-free.
Frequently asked questions
Where should I keep a sinking fund?
In a safe, liquid, interest-bearing account such as a high-yield savings account or money market fund. You want the money protected and available on your deadline, not exposed to market swings.
Why save instead of financing?
Paying cash avoids interest entirely and prevents a joyful purchase from becoming years of payments. A sinking fund turns a big expense into a planned, painless line item instead of debt.
What if I cannot hit the monthly number?
Extend the deadline, lower the target, or increase current savings — the tool recalculates instantly. Even a longer timeline beats financing, because you still pay zero interest.