Foundations · 01

Avalanche or snowball?

Avalanche pays the highest rate first and saves the most interest. Snowball pays the smallest balance first and builds momentum. See both timelines side by side.

Currency

Your cards

Up to three cards. Leave balance at zero to skip a row.

Card 1
Card 2
Card 3

Payoff plan

The total you can throw at the cards each month.

What you can commit each month across all cards. The minimum on each card is taken first, then the remainder routes to the priority card by strategy.

Avalanche saves vs snowball
£0

Total interest avoided over the payoff window.

Avalanche months
42
Snowball months
42
Total debt
£15,000
Avalanche pays off in 42 months versus 42 for snowball and saves £0 in interest. Avalanche is mathematically optimal. Snowball is psychologically easier (smallest balance disappears first). Either beats minimum payments by a huge margin.

Illustrative figures only. Minimum payments are modelled at a flat baseline per card; the real minimum can be percentage-based and varies by issuer. For your specific situation, consult a qualified adviser.

Debt-free, with the next move queued.

Worth maps debt payoff into a household trajectory: which card to clear first, when the interest line breaks, what to do with the freed cash flow after. Join the waitlist.

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Frequently asked questions

Should I invest instead of paying off cards?

Almost certainly not. Card APRs typically sit between eighteen and twenty-eight per cent, well above any reasonable expected investment return. Paying off cards is a guaranteed double-digit return via interest avoided. After cards are clear, then start investing.

What about minimum payments?

Minimums (typically two to three per cent of balance) usually only cover interest plus a tiny sliver of principal. A five-thousand balance at twenty-two per cent paying minimums takes around twenty years to clear and costs over a balance-worth in interest. Always pay above the minimum.

Does a balance transfer help?

Yes, if used correctly. A zero per cent balance transfer card can clear the APR for twelve to twenty-one months. The maths beats both avalanche and snowball if you can get one approved and pay it off within the promo window. Watch for transfer fees (around three per cent) and any reversion APR after the promo ends.

Which strategy is right for me?

Avalanche if you are disciplined and want the maximum savings. Snowball if you need wins to stay motivated. The interest gap between the two is usually modest for most realistic debt loads, so either beats hesitation. The wrong strategy you actually follow beats the optimal one you abandon.