Debt Payoff Calculator

Enter every credit card, loan, and balance you're carrying, and this calculator shows you exactly how long it will take to become debt-free — and how much interest you'll pay along the way. Compare the two most popular payoff strategies, debt snowball and debt avalanche, side by side, and see which one gets you out of debt faster or saves you more money.

Quick Debt Payoff

Estimate your payoff date and interest in seconds

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Client-side calculation. Your financial numbers never leave your device.

Managing multiple loans or cards?

Compare Snowball vs. Avalanche strategies by adding all your individual debts and loans.

How It Works

Add each debt with its balance, interest rate, and minimum payment. Add any extra amount you can put toward debt each month. The calculator simulates your payoff month-by-month under both strategies and shows you the results side by side — no signup, no email required.

Debt Snowball vs. Debt Avalanche — What's the Difference?

Method 1

Debt Snowball Method

Pay the minimum on every debt except one. Put all your extra money toward the debt with the smallest balance, regardless of its interest rate. Once that one's gone, roll its payment into the next-smallest debt, and so on. The math isn't optimal, but the quick early wins make it easier for many people to stick with.

Method 2

Debt Avalanche Method

Pay the minimum on every debt except one. Put all your extra money toward the debt with the highest interest rate, regardless of its balance. This mathematically minimizes the total interest you pay — but the first payoff win may take longer to arrive.

Assumptions and Limitations

This calculator provides estimates based solely on the balances, interest rates, and payments you enter. It is not a guarantee of what a lender or card issuer will charge.

  • Fixed rates. Each debt's APR stays constant for the entire simulation. Variable-rate debts (credit cards, adjustable loans) may see rate changes in real life that are not reflected here.
  • Regular monthly payments. The calculator assumes you make every minimum payment on time, in full, each month. Late fees, missed payments, and partial payments are not modeled.
  • Extra payment behavior. Any extra amount you enter is applied entirely to the highest-priority debt under the selected strategy — smallest balance for snowball, highest APR for avalanche — and rolls forward as each debt is paid off.
  • No fees or penalties. Annual fees, late fees, origination fees, prepayment penalties, and other charges are not included unless you represent them as a separate debt or adjust a balance manually.
  • No new purchases or advances. The simulation assumes no new debt, new purchases, balance transfers, or cash advances are added during the payoff period.
  • Informational only. Results are a simplified projection and may differ from a lender's or card issuer's actual statement. Always verify your terms and payoff schedule directly with your creditors.

Frequently Asked Questions

What is the debt snowball method?
It's a payoff strategy where you target your smallest balance first, then roll that payment into the next-smallest debt once it's paid off — building momentum through quick wins.
What is the debt avalanche method?
It's a payoff strategy where you target your highest-interest debt first, which minimizes the total interest you pay over time compared to any other order.
Which method saves more money?
Avalanche saves more in total interest in almost every case, because it eliminates your most expensive debt first. Snowball can still be the better practical choice if its early wins are what keep you consistent.
How is my payoff date calculated?
The calculator simulates your balances month by month — applying interest, then your minimum payments, then any extra payment toward your priority debt — until every balance reaches zero.
Does adding extra payments really make a big difference?
Yes. Even a small extra amount reduces the balance interest compounds on every single month, which compounds into large savings over the life of the debt.
Is this financial advice?
No. This tool provides estimates for informational purposes only. See the disclaimer below.

This calculator provides estimates for informational purposes only and does not constitute financial advice. Actual results depend on your specific loan or card terms, fees, and any future interest rate changes. Consult a licensed financial advisor for guidance specific to your situation.