Debt payoff calculator
See the exact month you become debt free, what the interest will cost you, and the quieter number almost no calculator shows: what that interest could have become instead.
Paying your way clears the balance 17 years sooner and keeps $6,814 of interest in your pocket.
That $1,286 of interest is not just gone. Invested instead at the market’s long-run average of about 10 percent, in 10 years it could have been $3,335.
A rough illustration, not a forecast. Returns vary and are never guaranteed. The point is the same one CostMe is built on: every dollar has a second life you do not see.
The math, in plain English
Every month, your interest rate is split into twelve and charged on whatever you still owe. Your payment covers that interest first. Only what is left over actually shrinks the balance.
That is why a large balance at a high rate can feel stuck. If most of your payment is going to interest, the principal barely moves, and next month the interest is charged on almost the same amount again.
Raising the payment breaks the loop. Every extra dollar goes straight to principal, which lowers next month’s interest, which frees up more of the following payment, and so on. Small increases compound into far fewer months and far less interest. The calculator above shows that gap between paying the minimum and paying with intent.
For the mechanics behind it, see how compound interest works and good debt versus bad debt.
What CostMe does that this calculator does not
This page handles one balance at a time. Inside CostMe, the picture gets fuller.
- Upload a statement and we read the APR, balance, and minimum for you, so you are not squinting at fine print.
- Compare avalanche, snowball, and consolidation side by side across all of your debts at once.
- See the opportunity cost of every dollar of interest, the same way the calculator above does it, built into your whole plan.
Questions, answered plainly
How is credit card interest calculated?
Your APR is divided by twelve to get a monthly rate, then charged on your balance each month. Your payment covers that interest first, and only the remainder reduces what you owe. Because interest is charged on the balance that is left, a smaller balance means less interest next month. That is why paying extra early does so much work.
Avalanche or snowball, which is better?
With more than one debt, avalanche sends extra money to the highest-rate debt first and saves the most money. Snowball clears the smallest balance first for an early win. The math favors avalanche. The one you will actually stick with is the one that works.
When does it make sense to consolidate?
Consolidation helps when it truly lowers your blended rate and you can keep the old balances from creeping back up. It fits high-rate revolving debt best. It is worth less when fees cancel the savings or the low rate is only an introductory teaser.
What counts as a good APR?
It varies by loan. Mortgages and auto loans sit well below credit cards, which often run from the high teens into the twenties. As a rough guide, the low double digits or below is reasonable for unsecured debt, and lower is always better.
What if I cannot afford my minimum payment?
Reach out to the lender before you miss a payment. Many have hardship programs, lower rates, or temporary plans, and a nonprofit credit counselor can help you build one at no cost. Acting early keeps more doors open than waiting does.