Debt Payoff Calculator - Avalanche vs Snowball
Calculate your debt-free date and total interest using the debt avalanche or snowball method. Compare strategies to find the fastest and cheapest way out of debt.
Last updated: April 2026
Your Debts
Additional amount beyond minimum payments — the key lever for faster payoff
Total Debt
$37,000
Monthly Min Payments
$550
Total Monthly Payment
$750
Avalanche vs Snowball Comparison
| Method | Time to Debt-Free | Total Interest | Payoff Order |
|---|---|---|---|
Avalanche Highest rate first | 0mo | $0 | |
Snowball Lowest balance first | 0mo | $0 |
What are debt payoff strategies?
Two popular methods exist for paying off multiple debts. The debt avalanche targets the highest interest rate debt first, minimising total interest paid. The debt snowball targets the smallest balance first, providing quick wins to maintain motivation.
Mathematically, the avalanche method always saves more money. But the snowball method works better for people who need early momentum. This calculator lets you compare both and choose the best strategy for your situation.
How to use this calculator
- 1Add your debts — Enter each debt with its balance, interest rate, and minimum payment.
- 2Set extra payment amount — Enter how much additional money you can put toward debt each month.
- 3Choose payoff method — Select avalanche (highest rate first) or snowball (smallest balance first).
- 4Review your debt-free date — See when you will be debt-free and total interest paid with each method.
Formula & example
Monthly Payment = Minimum Payments + Extra Payment | Avalanche: Target highest rate first | Snowball: Target lowest balance first
Example: Two debts: Credit card 5,000 at 20% APR (min 100) and personal loan 10,000 at 10% APR (min 200). With 150 extra monthly, avalanche pays off credit card first and saves more in total interest.
Benefits
Compare strategies side by side
See exactly how much interest each method saves and how they differ in payoff timeline.
Debt-free date visibility
Know exactly when you will be debt-free under each strategy.
Motivation tracking
The snowball method shows early wins that keep you motivated on your debt payoff journey.
Extra payment impact
See how even a small extra monthly payment dramatically reduces total interest and payoff time.
Use cases
Credit card debt
Plan how to pay off multiple credit cards efficiently.
Student loans
Create a repayment strategy for multiple student loans with different interest rates.
Mixed debt portfolio
Manage a combination of personal loans, car loans, and credit cards together.
Debt consolidation comparison
Compare your current strategy against consolidating debts into one lower-rate loan.
Frequently asked questions
Which method saves more money?+
The debt avalanche always saves more money in total interest because you eliminate the highest-rate debt first. The difference can be significant with high-interest debts like credit cards.
Which method is faster?+
The avalanche method is also typically faster in terms of total payoff time, though both methods finish at the same time if you maintain the same total monthly payment throughout.
What is debt snowballing?+
In the snowball method, you pay minimum payments on all debts except the smallest balance, which gets all extra payments. Once the smallest debt is paid, you roll its payment to the next smallest. The growing payment creates a snowball effect.
Should I build an emergency fund or pay off debt first?+
Most financial advisors recommend keeping 1,000 to 3 months of expenses as an emergency fund before aggressively paying off debt. Without a buffer, unexpected costs can push you back into debt.
Can I switch methods midway?+
Yes. You can switch from snowball to avalanche or vice versa at any time. Use whichever method keeps you motivated and consistent with your payments.