Debt Snowball Calculator
The debt snowball method focuses on paying off your smallest balance first. You pay the minimum on all debts, then throw any extra money at the smallest one. When it's gone, you roll that payment into the next smallest — building momentum like a snowball rolling downhill.
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Related: Debt Avalanche · Credit Card Payoff
How the debt snowball method works
The debt snowball method was created and popularised by personal finance author Dave Ramsey. The approach is straightforward: list all your debts, pay the minimum on every one, and throw all your remaining money at the smallest balance regardless of its interest rate. When that debt is cleared, take its minimum payment and add it to what you were already paying on the next smallest debt. Each payoff rolls funds forward, building momentum like a snowball gathering size.
The key advantage of the snowball is psychological. Eliminating accounts entirely — even small ones — provides a clear sense of progress and keeps motivation high through what can be a long repayment journey. Compare this to the debt avalanche method, where you target the highest interest rate first. Mathematically, the avalanche is cheaper because it minimises total interest paid. However, it can feel slow if your highest-rate debt also carries the largest balance. Research in behavioural finance suggests that for many people, the motivational wins from the snowball make it more likely they will follow through and actually become debt-free.
Frequently asked questions
What is the debt snowball method?
You focus all extra payments on your smallest debt first while paying the minimum on everything else. When that debt is cleared, you roll its former payment onto the next smallest debt. The growing snowball of freed-up payments accelerates payoff: what started as a £50 extra payment becomes £100, then £175, as each debt falls away and its minimum is added to the pot.
Is debt snowball or debt avalanche better?
The avalanche method targets the highest interest rate first, which saves the most money in interest over time — making it the mathematically optimal strategy. The snowball prioritises the smallest balance for faster psychological wins, clearing accounts completely sooner. Research in behavioural economics suggests the snowball can be more effective for people who find motivation difficult to sustain, since visible progress matters as much as the numbers. If you are disciplined and primarily want to minimise cost, use avalanche. If you need early wins to stay on track, use snowball.
How much extra should I put toward debt each month?
Even an extra £50–£100 per month makes a substantial difference to your total interest paid and the time it takes to become debt-free. The snowball effect means that early extra payments compound in impact as cleared debts free up their minimums. Use this calculator to enter your actual debts and try different extra payment amounts to see the precise difference each level makes to your payoff timeline and total interest.
Should I use savings to pay off debt?
Generally yes, if your debt interest rate is higher than your savings rate — paying off a 20% APR debt gives you a guaranteed 20% return, far better than most savings accounts. However, most advisers recommend keeping a small emergency fund of around £1,000 before aggressively paying down debt. Without any buffer, an unexpected bill (car repair, boiler breakdown) is likely to push you back into debt immediately. Once you have a modest emergency fund, direct remaining savings at your highest-cost debts first.