Debt payoff calculator
Compare the debt snowball and avalanche methods on your real debts in the United Kingdom. Enter each balance, APR and minimum, add an extra monthly amount, and see your debt-free date and the interest you'll save — instant, private, no signup.
On top of all minimums — this is what powers the payoff.
Debt-free (avalanche)
2 yr 11 mo
Avalanche
2 yr 11 mo
£3,624 interest
Snowball
2 yr 11 mo
£3,624 interest
Payoff order (avalanche)
- Store card — cleared by Jan 2027
- Credit card — cleared by Jul 2028
- Auto loan — cleared by May 2029
How this estimate is calculated
We simulate every debt month by month at the rate you enter. Each month interest accrues, every debt gets its minimum, and the rest of your fixed budget (all minimums plus your extra) goes to one target — the highest-APR debt for avalanche, the smallest balance for snowball — rolling forward as each clears. The baseline pays only minimums, so the difference is your interest and time saved.
See our full methodology for assumptions, limits and the 2026 data used.
Sources
- Bank of England — effective interest rates (as of 2026-02-28)
- Written by
- Colson — Founder & consumer-finance researcher, ColsonSuperApps LLC
- Verified
- Every figure checked against its cited primary source
- Last updated
- June 14, 2026
- Standards
- Editorial policy
These results are educational estimates based on the figures you enter and standard financial math, not financial advice or an offer of credit. Your actual rate, payment and terms depend on your credit, lender and other factors. Verify any number with the lender before you act.
Frequently asked questions
Is the snowball or avalanche method better?
The avalanche (highest APR first) always costs the least interest; the snowball (smallest balance first) clears debts faster for motivation. This tool shows both so you can choose math or momentum.
Does an extra payment really help?
Yes — minimum payments are mostly interest, so balances barely move. Every extra pound or dollar goes straight to principal and compounds as each debt clears.