Two Card Payoff Calculator
Pay off two credit cards with a single monthly budget. Enter each balance, APR and minimum, choose the avalanche or snowball order, then press Calculate to see how fast you clear the debt and the interest it costs.
Written by TopicDrill Editorial Team·Updated June 2026
Balance paid down over time
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How the two card payoff calculator works
Each month the tool adds interest to both balances, pays every card its minimum, then throws all of your remaining budget at one target card chosen by the method you select. When that card reaches zero, its freed-up payment rolls onto the other card, which is why the second balance falls faster and faster toward the end.
The chart traces your combined balance dropping to zero, with a dashed line for the first card so you can see exactly when it is cleared and the snowball effect kicks in on the remaining debt.
A quick example
Say card one holds $6,000 at 22.9 percent and card two holds $2,500 at 17.5 percent, with a combined budget of $450 a month. On the avalanche plan the budget attacks the 22.9 percent card first because it costs the most, then rolls onto the cheaper card, clearing both faster and for less interest than paying them evenly.
Things to keep in mind
The plan only works if you keep charging less than you pay, so freeze new spending on both cards while you knock down the balances. For a neutral primer on payoff strategies, see the CFPB. If you are weighing a single loan to consolidate both cards, compare the numbers with our future value calculator to see what the freed-up payments could earn afterward.
Frequently asked questions
What is the difference between avalanche and snowball?
The avalanche method sends every spare dollar to the card with the highest APR first, which pays the least interest overall. The snowball method targets the smallest balance first to clear a card quickly and build momentum. This calculator runs whichever order you pick.
How does the rolling payment work?
Each card always gets at least its minimum payment, and the rest of your budget attacks the target card. As soon as the target card hits zero, the money that was paying it rolls onto the remaining card, so the second card is wiped out faster than it would be on its own.
Why does my budget have to beat both minimums?
If the budget cannot even cover both minimum payments, the balances keep growing as interest is added faster than you pay it down, and the debt is never cleared. The tool asks for a budget above the combined minimums so the plan actually finishes.
Which method saves the most money?
Avalanche almost always pays the least total interest because it kills the most expensive debt first. Snowball can cost a little more but clears a whole card sooner, which some people find easier to stick with. Try both and compare the totals.
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