How to Use the Debt Payoff Calculator
The Debt Payoff Calculator compares two proven debt elimination strategies — the Avalanche method and the Snowball method — so you can choose the approach that best fits your psychology and financial goals.
Enter all your debts: credit cards, personal loans, car loans, or any other obligations. Include the balance, interest rate, and minimum payment for each. The calculator shows the payoff order, timeline, and total interest paid under both strategies so you can make an informed choice.
The Avalanche method targets the highest-interest debt first, minimising total interest paid and paying off debt fastest in mathematical terms. The Snowball method targets the smallest balance first, providing psychological 'wins' that keep you motivated. Research shows the Snowball method often works better in practice because motivation matters as much as mathematics.
📊 Worked Example
Three debts: Credit card $4,000 @ 22%, Car loan $8,000 @ 6%, Personal loan $3,000 @ 15%. Extra $300/month available.
- Avalanche payoff: 38 months, $2,890 interest
- Snowball payoff: 40 months, $3,220 interest
- Avalanche saves: $330 and 2 months
- Both clear all debt faster than minimum payments only (72+ months)
Common Use Cases
- ✅ Creating a structured debt elimination plan across multiple accounts
- ✅ Comparing avalanche vs snowball to decide which strategy suits you
- ✅ Seeing how much total interest you'll pay under each method
- ✅ Finding out the exact payoff date for all your debts
- ✅ Calculating the impact of putting extra money toward debt
- ✅ Motivating yourself by seeing a clear debt-free date
- ✅ Deciding the order to pay off debts for maximum efficiency
Frequently Asked Questions
What is the Avalanche debt payoff method?
The Avalanche method directs all extra payments to the debt with the highest interest rate first, while making minimums on all others. Once the highest-rate debt is cleared, that payment plus minimums roll to the next highest rate. This minimises total interest paid.
What is the Snowball debt payoff method?
The Snowball method pays off the smallest balance first while making minimums on others. When the smallest debt is cleared, that payment plus minimums roll to the next smallest. This creates psychological momentum through quick wins, which can be powerful for staying motivated.
Which method is mathematically better?
The Avalanche method always results in less total interest paid because it prioritises the most expensive debt. However, the difference is often small unless there's a large gap in interest rates. The Snowball method's psychological benefits can make it 'better' in practice if motivation is the challenge.
What is a debt consolidation loan and should I use one?
Debt consolidation combines multiple debts into one loan at a (hopefully) lower rate, simplifying payments. It makes sense if you can genuinely get a lower overall rate. However, it doesn't reduce your debt — it restructures it. Avoid it if you'll be tempted to rack up credit card balances again.
How much extra should I put toward debt payoff?
Any amount above your minimum payments accelerates payoff significantly. Even an extra £50–£100/month can cut years off your debt timeline. Use a budget approach: cover essentials, make minimum payments on all debts, and direct every remaining pound to the target debt.