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Debt Snowball vs Avalanche Calculator
Find the fastest, cheapest way to become debt-free. Compare both payoff strategies side by side with a full repayment schedule.
Last updated: 17 May 2026
Two Methods, One Goal
Debt Avalanche
Pay off debts with the highest interest rates first. Mathematically optimal-saves the most money in interest.
Best for: People motivated by numbers and maximum savings
Debt Snowball
Pay off debts with the lowest balance first. Creates quick wins for psychological momentum.
Best for: People who need motivation and early victories
Your Debts
How much extra can you put toward debt each month? (Beyond minimums)
Debt Summary
Which Method Should You Choose?
Choose Avalanche if…
- You're motivated by numbers and want maximum savings
- You have high-interest debts (20%+ APR credit cards)
- You're disciplined and don't need quick psychological wins
- The interest savings are substantial (£500+)
Choose Snowball if…
- You need motivation and quick wins
- You've struggled with debt payoff in the past
- Your debts have similar interest rates (within 5% of each other)
- The interest difference is small (under £200)
- You have many small debts you can eliminate quickly
Hybrid Approach
Can't decide? Use avalanche as your primary strategy, but if you have a debt under £500 that you can eliminate in 2–3 months, knock it out first for a quick morale boost. Then switch to highest-interest debts.
Related Tools & Guides
Managing multiple debts? Debt Payoff Calculator lets you plan repayments for each debt individually with a full paydown timeline.
Once debt-free, stop those payments becoming dead money. Compound Interest Calculator shows what happens when you flip those monthly payments into investments.
For a deeper look at proven payoff strategies, read the How to Pay Off Debt Fast (UK Guide). And if debt feels unmanageable, the Debt Management Plan Guide explains when a DMP is the right call.