Compare the Snowball vs Avalanche method and find the fastest, cheapest path to becoming debt-free.
Amount above minimum payments to accelerate payoff
Pay highest interest first — saves the most money
Pay smallest balance first — builds momentum
Total debt: $15,500 | Debt-free in: 3y 4mo | Interest paid: $11,735
The Debt Payoff Calculator is a free online tool that helps you create a personalised debt elimination plan using either the Debt Snowball or Debt Avalanche method. Enter all your debts — credit cards, personal loans, student loans, car finance — and the calculator shows you exactly when each debt will be paid off, how much interest you will pay, and how much you can save by making extra payments. Getting out of debt is one of the most financially transformative things you can do, and this calculator gives you the roadmap to do it.
Add each debt: enter the name, current balance, interest rate (APR), and minimum monthly payment.
Enter any extra monthly amount you can put towards debt repayment beyond minimums.
Choose your strategy: Debt Snowball (smallest balance first) or Debt Avalanche (highest interest first).
The calculator shows your payoff timeline, total interest paid, and month-by-month payment schedule.
Compare both strategies to see the interest savings from the Avalanche vs the motivational wins from the Snowball.
Use the results to set up a debt payoff plan in the Pipstario Financial Freedom Planner.
The Debt Snowball method, popularised by Dave Ramsey, prioritises paying off the smallest balance first regardless of interest rate. Once the smallest debt is eliminated, you roll its payment into the next smallest, creating a 'snowball' of increasing payment power. The psychological advantage is significant: early wins build momentum and motivation, which research shows is critical for long-term debt payoff success.
The Debt Avalanche method prioritises the highest-interest debt first. Mathematically, this is the optimal strategy — it minimises total interest paid and gets you out of debt faster. If you have a credit card at 24% APR and a personal loan at 8% APR, the avalanche method directs every extra pound at the credit card first.
In practice, the best method is the one you will stick to. If you need early wins to stay motivated, use the Snowball. If you are disciplined and want to minimise cost, use the Avalanche. Many people use a hybrid approach: pay off one small 'quick win' debt first, then switch to the Avalanche for the remaining debts.
The impact of extra payments on debt payoff timelines is dramatic and often underestimated. On a £10,000 credit card balance at 20% APR with a minimum payment of £200/month, it would take approximately 94 months (nearly 8 years) to pay off and cost £8,800 in interest. Adding just £100/month extra reduces the payoff time to 48 months and saves £5,200 in interest.
The key insight is that extra payments reduce the principal faster, which reduces the interest charged in subsequent months, which means more of each future payment goes to principal — a compounding effect that works in your favour.
Finding extra money for debt repayment often requires a combination of: cutting discretionary spending (subscriptions, dining, entertainment), increasing income (side hustles, overtime, selling unused items), and redirecting windfalls (tax refunds, bonuses, gifts) entirely to debt. Even small amounts — £25–£50 per month — make a meaningful difference over time.
Pay off your smallest debt first for a quick win. The psychological boost of eliminating a debt entirely is powerful and helps maintain momentum for the longer journey ahead.
If you are disciplined, the Avalanche method (highest interest first) saves the most money. Even a few percentage points of interest difference compounds significantly over years.
Paying off debt while adding new debt is like bailing out a boat with a hole in it. Freeze your credit cards, delete saved payment details, and commit to a cash-only or debit-only lifestyle while paying off debt.
Tax refunds, bonuses, birthday money, and any unexpected income should go directly to your highest-priority debt. These lump-sum payments can shave months or years off your payoff timeline.
Call your credit card companies and ask for a lower interest rate. This works more often than people expect, especially if you have a good payment history. A 2–3% reduction can save hundreds of pounds in interest.
A 0% balance transfer credit card can give you 12–24 months of interest-free repayment. This is most effective if you can pay off the transferred balance before the promotional period ends.