Debt Payoff Calculator
Global Finance
Debt payoff calculator
Enter a starting balance, annual interest rate, and monthly payment to see your payoff timeline and total interest cost.
Debt Payoff
Months to payoff
32
Total paid
$6,400.00
Monthly payment
$200.00
How calculations work
This calculator runs entirely in your browser; no data is transmitted externally.
- Monthly interest: the annual rate divided by 12 is applied to the outstanding balance each month.
- Payment application: monthly payment is subtracted after interest is added for that month.
- Safeguard: if the monthly payment does not cover the interest, the tool shows that payoff is not achievable with the current payment.
- Simulation: we iterate month-by-month until balance ≤ 0 or a safety limit is reached.
Results are illustrative and assume fixed interest and fixed monthly payment.
What this calculator does
This Debt Payoff Calculator estimates how many months (and the total interest paid) it will take to fully repay a credit balance or loan when you provide a starting balance, annual interest rate, and a recurring monthly payment. It is a simple month-by-month simulation.
Who should use this calculator
Use this tool if you want a practical projection of how long debts will last at a fixed monthly payment — for example, credit card balances, small personal loans, or short-term repayment planning. It is not a substitute for professional financial advice.
How this calculator works
The calculator applies the monthly interest (annual rate divided by 12) to the outstanding balance, then subtracts the monthly payment. This repeats until the balance reaches zero. Results assume interest is compounded monthly with no additional fees or late charges.
How to interpret the results
The output shows the number of months to pay off the balance and the cumulative interest paid. Shorter payoff times mean less interest but require larger monthly payments.
Example
For a $5,000 balance at 18% APR with a $150 monthly payment, the calculator shows how many months it will take and how much total interest you will pay. Compare raising payments or consolidating.
Limitations & disclaimer
This estimate ignores fees, changing interest rates, and missed payments. It is only an informational projection — always confirm details with your lender or a financial advisor. For localized rules, see the calculators hub.
Frequently asked questions
What happens if my payment does not cover monthly interest?
The calculator will indicate that payoff is not possible under the current inputs. You would need to increase the monthly payment above the monthly interest amount to make progress on the balance.
Does this account for variable interest rates?
No. The calculator uses a fixed annual rate for the entire projection. If your rate changes, re-run the calculation with the updated rate.
Can I use this for credit card debt?
Yes. Enter your credit card balance, the APR, and the amount you plan to pay monthly to see how long it will take to pay off.
Are late fees or penalties included?
No. The projection assumes on-time payments with no additional charges. Real payoff schedules may take longer if fees are incurred.