Managing debt across multiple cards
Most people carrying credit card debt aren't dealing with just one card — they have two, three, or more, each with its own balance, APR, and minimum payment. Figuring out where to direct extra money each month, and how long it will really take to clear everything, is a much harder mental math problem than a single-card payoff. This calculator handles that complexity for you.
Rather than picking a strategy in advance, this tool lets you enter your full list of cards once and then toggle between the two most common payoff strategies — debt avalanche (highest APR first) and debt snowball (smallest balance first) — to see exactly how each one plays out for your specific numbers.
How the simulation works
Every month, the calculator pays the minimum due on each card and then directs your full extra payment amount at a single target card, chosen according to whichever strategy you've selected. When a card's balance reaches zero, its minimum payment is freed up and added to the extra payment pool attacking the next target — so your total payoff power increases every time a card is eliminated, regardless of which strategy you're using.
A worked example
With three cards totaling $8,500 in combined balances and a $200 extra monthly payment, switching between avalanche and snowball on the same three cards typically produces a very similar total payoff time — usually within a month or two of each other — but a noticeably different total interest bill, with avalanche coming out ahead in pure dollar terms whenever the APRs vary significantly across cards.
Choosing your approach
- Run both strategies on your actual cards and compare the total interest and payoff time — the difference tells you exactly what the "motivation premium" of snowball costs you, if any.
- For a deeper look at either method individually, see the Debt Snowball Calculator or Debt Avalanche Calculator.
- If one card's rate is dramatically higher than the others, also check the Balance Transfer Calculator to see if moving it would help either strategy finish faster.