Debt Snowball Calculator UK
Estimate how quickly you could become debt-free using the snowball method — paying minimums then targeting the smallest balance first.
Calculator
What this means
The debt snowball method prioritises psychological wins by clearing the smallest debt first, then rolling that payment into the next smallest.
How to use this calculator
- List your debts with balances and interest rates.
- Set how much extra you can pay each month.
- See the snowball order and how quickly you become debt-free.
Worked example
Three debts: £400, £1,200 and £3,000.
- The snowball method targets the smallest balance first.
- Once it's cleared, its payment rolls onto the next debt.
You clear the £400 first, then snowball that payment into the larger debts.
Who this is for
- Anyone juggling several debts.
- People who want quick wins to stay motivated.
- Anyone choosing between the snowball and avalanche methods.
Snowball vs avalanche
The debt snowball clears the smallest balance first for psychological momentum, then rolls each freed-up payment onto the next debt. It's motivating because you see debts disappear quickly.
The avalanche method instead targets the highest interest rate first, which saves the most money mathematically. The best method is the one you'll stick to.
Frequently asked questions
Snowball targets smallest balance first. Avalanche targets highest interest rate first and usually saves more interest.
This tool is best for consumer debts like credit cards and loans. Mortgages are usually handled separately.
This simplified version focuses on payoff order and timeline. For interest-heavy debts use the credit card or loan calculators.
The avalanche (highest interest first) saves the most money; the snowball (smallest balance first) gives quicker wins and motivation. Both work — choose the one you'll keep up.
StepChange, National Debtline and Citizens Advice offer free, impartial help and can set up a structured repayment plan if you're struggling.
Disclaimer
This calculator provides estimates for guidance only. It is not financial, legal or tax advice. Always check official sources or speak to a qualified professional before making decisions.
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