Debt Snowball Calculator — Payoff Order and Interest Total
Build a debt snowball plan: enter balances, APRs, and minimum payments to see your debt-free date and total interest.
Payoff strategy
Pay smallest balance first to close accounts sooner.
Your debts
3 debtsRound up extra payments
Apply an extra $50/mo toward your highest-priority debt.
Your debt-free date
May 2031
Following the Snowball strategy with $100.00 extra per month.
Total interest
$5,479.19
Months to free
58
Interest saved
$5,904.39
Total interest
$5,479.19
Months to free
58
Interest saved
$5,904.39
79%
paid off
Payoff progress · 79% paid off
vs minimum-only: $5,904.39 less interest (based on your inputs).
Payoff order (Snowball)
Personal loan
$3,500.00 @ 11.9%
cleared Feb 2028
Credit card
$4,200.00 @ 22.4%
cleared Jun 2030
Auto loan
$12,800.00 @ 7.1%
cleared May 2031
Payoff strategy
Pay smallest balance first to close accounts sooner.
Your debts
3 debtsRound up extra payments
Apply an extra $50/mo toward your highest-priority debt.
Your debt-free date
May 2031
Following the Snowball strategy with $100.00 extra per month.
Total interest
$5,479.19
Months to free
58
Interest saved
$5,904.39
Total interest
$5,479.19
Months to free
58
Interest saved
$5,904.39
79%
paid off
Payoff progress · 79% paid off
vs minimum-only: $5,904.39 less interest (based on your inputs).
Payoff order (Snowball)
Personal loan
$3,500.00 @ 11.9%
cleared Feb 2028
Credit card
$4,200.00 @ 22.4%
cleared Jun 2030
Auto loan
$12,800.00 @ 7.1%
cleared May 2031
| # | Month | Payment | Principal | Interest | Balance |
|---|---|---|---|---|---|
| 1 | Jul 2026 | $539.00 | $350.16 | $188.84 | $20,149.84 |
| 2 | Aug 2026 | $539.00 | $353.00 | $186.00 | $19,796.84 |
| 3 | Sep 2026 | $539.00 | $355.88 | $183.12 | $19,440.96 |
| 4 | Oct 2026 | $539.00 | $358.77 | $180.23 | $19,082.19 |
| 5 | Nov 2026 | $539.00 | $361.69 | $177.31 | $18,720.50 |
| 6 | Dec 2026 | $539.00 | $364.63 | $174.37 | $18,355.87 |
Swipe to see all columns
Planning estimates only — not financial, tax, or lending advice. Actual payoff dates depend on your lender's terms, fees, and payment posting. Check your lender's payoff quote before changing payments.
How this is calculated
PaydownBase simulates each month of your payoff plan using standard amortization: interest accrues on each remaining balance at your entered APR, minimum payments are applied first, and any extra payment goes to the priority debt based on your strategy.
Snowball sends extra payments to the smallest balance. Avalanche sends extra payments to the highest APR. Minimum-only applies no extra payment. Default APR presets use Federal Reserve G.19 consumer credit averages for 2026 — always enter your own rates for accuracy.
Monthly interest accrual
Interestₘ = Balanceₘ₋₁ × (APR / 12)Principal paid = Payment − Interest. Remaining balance updates each month until all debts reach $0.
Federal Reserve G.19 · CFPB Reg Z Appendix M2 · Our methodology →
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Common questions
Snowball pays the smallest balance first, which can close accounts sooner. Avalanche pays the highest APR first, which usually lowers total interest for the same extra payment. Run both here with the same debts and extra payment.