Debt Snowball Calculator

Add multiple debts, apply minimums plus an extra monthly amount, and estimate payoff order, total interest, and debt-free time.

Extra monthly amount

Strategy

—Months to debt-free

—Estimated interest

—Estimated total paid

—Debts entered

—Estimated payoff order

Monthly-interest model using the entered APR and fixed minimum payments. Real cards and loans can use daily interest, changing minimums, fees, promotional rates, or prepayment rules.

Debt Snowball Calculator: Payoff & Extra-Payment Audit

Audit balances, APRs and minimums with payoff-order evidence, weighted APR and an extra-payment sensitivity scenario.

Extra-payment scenario +$

Core borrowing, saving & investing workflows

Start with the broad calculator that matches the decision, then move to a specialist only when the loan structure, cash flow, tax treatment, debt strategy or savings goal genuinely changes.

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Snowball vs avalanche: same monthly budget

Compare both strategies with the debts already entered above. Freed minimum payments stay in the monthly debt budget and roll to the next target, which models the defining payoff cascade.

Snowball—

Avalanche—

Modeled interest difference—

Strategy	Months	Interest	Total paid	Payoff order

Uses a monthly-interest estimate and keeps the initial minimum-payment total plus extra payment available as debts disappear.

Compare debt and rate scenarios

connects debt payoff, credit-card cost, loan comparison, APR/APY, effective-rate, weighted-rate, and hypothetical consolidation calculations.

Compare assumptions, not offers

Results are deterministic browser-local math from the values you enter. They are useful for scenario comparison, but they are not a lender quote, approval decision, investment forecast, credit recommendation, or substitute for an account agreement.

How to use this Debt Snowball Calculator

Add multiple debts, apply minimums plus an extra monthly amount, and estimate payoff order, total interest, and debt-free time.

Practical guide and verification

A true snowball keeps the monthly payment budget rolling forward

When one debt is paid off, its former minimum payment should become available to the next target instead of disappearing from the plan. The comparison panel holds the initial monthly debt budget constant so freed minimums cascade through later balances.

Snowball and avalanche optimize different priorities

Snowball targets the smallest balance first, while avalanche targets the highest APR first. Avalanche often reduces modeled interest, but the exact outcome depends on balances, rates, minimums and extra payment; compare both with the same inputs rather than assuming one difference.

Interest modeling is still an estimate

The browser model applies monthly interest from the entered APR. Real accounts may accrue interest daily, change minimum payments, include fees, use promotional rates or impose prepayment terms, so reconcile a plan against current account statements before treating dates as commitments.

Check that the monthly budget is sustainable

The strategy assumes you can continue the entered minimums plus extra amount each month. A faster payoff result is not useful if the payment budget cannot be maintained, so compare the modeled total with actual cash-flow constraints separately.

Use the payoff order as evidence, not a recommendation

The side-by-side table shows how two deterministic strategies behave under the entered assumptions. It does not evaluate credit score effects, taxes, emergency savings, legal priorities or lender terms; those considerations can matter more than the modeled interest difference.