Debt Payoff Calculator
Plan paying off multiple debts with avalanche or snowball strategies. See months to debt-free and total interest for each method.
Your debts
Debt-free in
36 months
3.0 years
Total interest
$1,779
Total paid
$10,279
Snowball comparison
36 months
$1,779 interest
Avalanche pays the highest-rate debt first to minimize interest; snowball pays the smallest balance first for quick wins. Both work — pick the one you will actually stick with.
How it works
Snowball sorts by balance ascending; avalanche sorts by APR descending. Fixed monthly budget applied; interest accrues monthly.
Example: $20,000 across 3 cards with $600/month → avalanche pays ~$2,300 less interest than snowball on equal balances.
Last updated: April 2026
How this calculator is verified
Checked by True Calculator automated test suite on
- Formula verified against a published worked example in the automated test suite
- Edge cases (zero, negative, boundary and unit-mismatch inputs) covered by unit tests
The full verification method is on our how we verify page. Found an error? Tell us and we will re-check it.
When to Use This Calculator
Use the debt payoff calculator when you have multiple loans or cards and want a clear order and timeline for clearing them. It compares the two standard strategies — avalanche, which pays the highest-rate debt first and costs the least interest, and snowball, which clears the smallest balance first and builds momentum. Enter each debt with its balance, rate and minimum payment, add the extra amount you can afford monthly, and read the months to debt-free and total interest under both methods. Indian cardholders paying 36% interest alongside a 9% personal loan see immediately why the avalanche order matters. Whichever method you pick, the concrete debt-free date and the interest saved give you a target to track month after month.
How to Use This Calculator
- Step 1: Enter each debt's balance, annual rate and minimum monthly payment.
- Step 2: Enter the extra amount you can pay each month across all debts.
- Step 3: Choose the strategy — snowball pays the smallest balance first, avalanche the highest rate first.
- Step 4: Read the months to debt-free and total interest for the chosen strategy, then switch to compare.
Worked Example
Two debts: ₹40,000 on a card at 12% (minimum ₹3,000) and ₹4,00,000 on a personal loan at 15% (minimum ₹12,000), with ₹5,000 extra to deploy each month. The snowball method finishes in 30 months with about ₹87,100 in interest. The avalanche method — highest rate first — finishes in 28 months with about ₹79,500 in interest, saving roughly ₹7,600. The difference comes from pointing the extra money at the 15% loan first.
Tips and Common Mistakes
- •Tip 1: Avalanche saves more interest, but snowball gives quicker psychological wins — pick the strategy you will actually stick to.
- •Tip 2: The total extra budget matters more than the order — both strategies need the same monthly extra to work.
- •Tip 3: Indian cards charge 36-48% a year against roughly 10.5-24% for personal loans, so the high-rate card is usually the avalanche target.
- ✗Mistake 1: Setting minimums below what the lender actually charges (such as 5% of the card balance) — it understates the payoff time.
- ✗Mistake 2: Spreading the extra across every debt; both strategies concentrate it on one debt at a time.
Frequently Asked Questions
Which is better — debt snowball or debt avalanche?
Avalanche saves the most money by targeting the highest interest rates first. Snowball builds momentum by paying off the smallest balances first. Compare both strategies here to see the difference.
How much faster can I pay off debt with extra payments?
Even $50 extra per month can shave years off your payoff timeline. Add your monthly budget and the calculator shows the total interest you save.
Should I pay off the highest rate or the smallest balance first?
The highest rate saves you the most interest overall (avalanche). The smallest balance gives quicker wins that keep you motivated (snowball). Both keep you paying the same total monthly budget.
Is this debt payoff calculator free to use?
Yes, True Calculator's debt payoff calculator is completely free with no sign-up, no app install and no usage limits.
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