Which debt payoff method saves more money?

The Avalanche method always saves more in total interest paid compared to the Snowball method (or the same amount if all rates are equal). The savings can range from a few dollars to thousands depending on the spread of interest rates across your debts.

How much extra should I pay toward debt each month?

Any extra amount helps. Even $50-100/month extra can shave years off your payoff timeline and save hundreds or thousands in interest. Use this calculator to see the exact impact of different extra payment amounts on your specific debts.

What if my payment is less than the monthly interest?

If your total payment is less than the interest accruing each month, your debt will grow over time (negative amortization). This calculator will show an error in this case, since the debt can never be paid off under those terms. You need to increase payments or reduce the interest rate.

Should I pay off debt or invest?

A common rule of thumb: pay off debt with interest rates above 6-7% before investing, since guaranteed 'returns' from eliminating high-interest debt often exceed expected market returns. For low-rate debt (e.g., 3% mortgage), investing may yield higher net returns, but being debt-free has psychological benefits too.

What happens after I pay off the first debt?

Roll the entire payment (minimum + extra) from the paid-off debt to the next target debt. This creates a 'snowball effect' where payments accelerate as debts are eliminated. Your total monthly payment stays the same, but more goes to principal.

Should I include my mortgage in this calculator?

Mortgages can be included, but focus on high-interest consumer debt first. Mortgage rates are typically much lower (3-7%) than credit cards (18-25%). Pay off cards and personal loans before accelerating mortgage payoff.

How do I decide between Avalanche and Snowball?

Use Avalanche if you're disciplined and focused on math (saves the most money). Use Snowball if you need quick wins for motivation or have struggled with debt before. The best method is the one you'll stick with.

finance

Debt Payoff Calculator

Calculate your debt-free date with Avalanche or Snowball strategies. Compare total interest, monthly payments, and amortization schedules.

Last updated: March 31, 2026

Payoff Strategy

Debt 1

Debt Name

Balance

APR

Min. Payment

Extra Monthly Payment (optional)

Financial Disclaimer: This calculator provides estimates based on fixed interest rates and consistent monthly payments. Actual results may vary due to variable rates, fees, compounding methods, and changes in minimum payments. This tool does not constitute financial advice. Consult a qualified financial advisor before making debt repayment decisions.

How to Use This Calculator

Add each debt with its name, current balance, interest rate (APR), and minimum monthly payment.
Enter any extra monthly payment you can make above the combined minimums.
Click Calculate to see your payoff timeline for both Avalanche and Snowball strategies.
Compare total interest paid, payoff date, and monthly schedules side by side.
Review the amortization chart to visualize your debt-free journey over time.

Real-World Examples

Credit Card and Student Loan Combo

Credit card: $5,000 at 22% APR, $150 min. Student loan: $25,000 at 5% APR, $280 min. Extra payment: $300/month.

Result: Avalanche: debt-free in 4.2 years, $5,890 total interest. Snowball: 4.5 years, $6,420 interest. Avalanche saves $530.

Multiple Credit Cards Strategy

Three cards: $3,000 at 19%, $1,500 at 24%, $4,500 at 16%. Total minimums: $270. Extra: $200/month.

Result: Avalanche targets 24% card first, then 19%, then 16%. Debt-free in 2.1 years. Snowball targets $1,500 first. Debt-free in 2.3 years.

Common Mistakes to Avoid

Stopping extra payments once one debt is paid off instead of rolling that payment to the next debt.
Not accounting for the 'snowball effect' where each paid-off debt frees up its minimum to attack the next debt.
Choosing Snowball when there's a large interest rate spread (Avalanche saves significantly more in this case).
Forgetting that minimum payments decrease as balances decrease, which can slow progress if you don't maintain the original payment amount.

The Formula

Monthly Interest = Balance x (APR / 12). Avalanche: extra payments go to the highest-rate debt first. Snowball: extra payments go to the lowest-balance debt first. Both methods pay minimums on all debts, then apply the extra to the target debt.

Learn More

Finance

Debt Snowball vs Avalanche: Which Payoff Strategy Wins?

Snowball builds momentum. Avalanche saves money. Which payoff strategy actually works?

April 3, 2026

Frequently Asked Questions

The Avalanche method pays off debts with the highest interest rate first, saving you the most money in total interest. The Snowball method pays off debts with the smallest balance first, giving you quick wins that build motivation. Avalanche is mathematically optimal; Snowball is psychologically effective.

Methodology & Sources

Amortization computed using standard compound interest formulas. Snowball and avalanche strategies follow established debt reduction methods popularized by Dave Ramsey and financial planners.