WorthCalc

Debt Snowball vs Avalanche Calculator

Example values are editable illustrations, not market averages or recommendations.

Basic inputs

Results

Enter your figures or load the example.

Final payoff—

Total interest—

Total payments—

Remaining balance—

First debt paid—

Assumptions used

    Methodology and Limitations

    Last updated: 2026-07-31

    Estimate disclaimer: Educational scenario estimate only; verify current contracts, rates, taxes and official rules before acting.

    List each debt’s balance, APR, and minimum payment, add the extra amount you can put toward payoff each month, and compare the snowball order (smallest balance first), the avalanche order (highest rate first), and a custom order you set yourself.

    Before you enter numbers

    Use the exact balance, APR, and minimum payment from each current statement. Note any promotional rate and its expiration date separately, since a plan calculated on a temporary rate will understate interest once the standard rate resumes.

    Formula

    monthly cycle: accrue interest → pay minimums → apply extra payment to the target debt → roll the freed minimum into the next debt once the target is cleared

    Worked example

    A $1,000 card at 22% APR, a $3,000 card at 15% APR, and a $7,000 loan at 8% APR, with $300 extra available each month, shows how quickly each method clears the first debt and how much total interest each order costs across all three.

    Choosing between the two orders

    Avalanche minimizes total interest in most realistic mixes; snowball clears a full account fastest, which research associates with a higher completion rate for some people. Run both and see which debt-free date and interest total you’re comfortable committing to.

    Limits and privacy

    This tool provides a general educational estimate, not individualized financial or credit counseling advice. It flags, rather than hides, any debt whose minimum payment doesn’t cover its own interest under the entered terms.

    The calculation runs in your browser. Do not put account numbers or other identifying information into a shareable link.

    Read Debt Snowball vs. Avalanche: What the Math (and the Research) Actually Show for the 2012 Journal of Marketing Research finding on payoff completion, a hybrid-order option, and when a promotional rate or forgiveness program should change your plan.

    Frequently asked questions

    Which strategy saves the most interest?

    Avalanche usually does, since it targets the highest interest rate first, though the gap narrows when rates across debts are close together.

    Why would snowball still be worth using?

    It can produce an earlier visible payoff on one full account, which research links to a higher chance of finishing the overall plan.

    Are freed minimum payments rolled forward automatically?

    Yes — once a target debt reaches zero, its former minimum joins the extra payment aimed at the next debt in the chosen order.

    Can I set my own custom order?

    Yes — select the custom strategy and rank the debts yourself, for example to prioritize a co-signed loan.

    What if a minimum payment doesn’t cover interest?

    The result flags that debt as not amortizing under the entered terms — a signal to contact the lender or a nonprofit credit counselor before finalizing a payoff order.

    Sources

    This tool runs entirely in your browser. Your input never leaves your device.