Debt Payoff Calculator
See how long your debt will take to clear — and how much faster you could get there with a little extra each month.
What this calculator tells you
Enter your balance, interest rate, and monthly payment, and you'll see your debt-free date, the total interest you'll pay, and what happens when you add a little extra. It turns a vague "someday" into a clear timeline you can act on.
Why extra payments matter so much
Interest is charged on your remaining balance, so every extra dollar you pay early does double duty — it lowers the balance and cuts the interest that would have grown on it. On high-rate debt, even $50 or $100 more a month can shave months off the timeline and save hundreds in interest.
Avalanche vs. snowball
Avalanche: pay minimums on everything, then throw extra at the highest-interest balance. This minimizes total interest.
Snowball: attack the smallest balance first for a quick win, then roll that payment into the next. This builds momentum and motivation.
Common debt mistakes
- Paying only the minimum, where most of it goes to interest.
- Ignoring the interest rate when deciding which debt to tackle first.
- Taking on new debt before the current balance is cleared.
- Overlooking balance transfers or consolidation on high-APR balances.
Frequently asked questions
How is my payoff time calculated?
We use standard loan amortization: your balance, annual interest rate, and monthly payment determine how many months it takes to reach a zero balance, and how much total interest you'll pay along the way.
What if my payment doesn't cover the interest?
If the monthly payment is at or below the interest charged each month, the balance never fully clears. The calculator flags this — even a small increase above the interest amount turns an endless balance into a finite one.
Should I use the avalanche or snowball method?
Avalanche (highest interest rate first) saves the most money. Snowball (smallest balance first) gives quicker wins and motivation. Both work — the best one is the one you'll actually stick with.
Does a balance transfer or consolidation help?
Often, yes. Lowering your APR sends more of each payment to the principal instead of interest, which can shorten the timeline and cut total interest — especially on high-rate credit card debt.
Is this financial advice?
No. The results are educational estimates based only on the numbers you enter, and they are not financial, legal, or professional advice.
More calculators
Can I Afford It Calculator
Check any purchase or monthly payment against your full budget.
Rent Affordability Calculator
Find a rent that fits your income comfortably.
Car Affordability Calculator
See what car payment your budget can handle.
Emergency Fund Calculator
Work out how big your safety net should be.
Monthly Survival Number Calculator
Know the minimum you need each month.
Move Out Calculator
Check if you're ready to live on your own.
Financial disclaimer
This calculator provides general educational estimates only. It is not investment, tax, legal, or professional financial advice, and it does not account for every part of your situation. For decisions that matter, consider speaking with a qualified professional. Read our full financial disclaimer.