Debt Payoff Calculator
Compare the Snowball (smallest balance first) and Avalanche (highest APR first) strategies to find your fastest debt-free date.
£100/mo
This extra amount is applied to the target debt after all minimum payments are made. Even £50 extra per month makes a significant difference.
Best Choice
❄️ Snowball
Smallest balance first
4y 4m
Debt-free date
Total interest: £3,707
Pay off smallest debt first for quick wins and motivation. Then roll that payment into the next.
🏔 Avalanche
Highest APR first
4y 4m
Debt-free date
Total interest: £3,707
Attack highest interest rate debt first. Mathematically optimal — saves the most money.
How the Strategies Work
❄️ Debt Snowball
- List debts smallest to largest
- Pay minimums on all debts
- Put every extra pound on the smallest debt
- When paid off, roll full payment to next smallest
- Provides psychological wins — proven to improve follow-through
🏔 Debt Avalanche
- List debts highest APR to lowest
- Pay minimums on all debts
- Put every extra pound on the highest APR debt
- When paid off, roll full payment to next highest APR
- Minimises total interest paid — mathematically optimal