Debt-Free Date Calculator
Find out when you will be completely debt-free.
Enter your balance, interest rate, and monthly payment to see your payoff date.
Debt-Free Date is calculated using the standard amortization formula to determine how many months it takes to pay off a balance at a given interest rate.
The core formula is:
Months = -log(1 - (r × B / P)) / log(1 + r)
Where:
- B = current balance (total debt remaining)
- P = monthly payment amount
- r = monthly interest rate (annual rate divided by 12)
How it works step by step:
- Each month, interest accrues on your remaining balance
- Your payment first covers the interest, then reduces the principal
- As the balance shrinks, more of each payment goes toward principal
- This acceleration effect means the last months pay off debt faster than the first
Important considerations:
- Your monthly payment must exceed the monthly interest charge, otherwise your debt grows instead of shrinking
- Monthly interest = Balance × (Annual Rate / 12)
- Even small extra payments can dramatically reduce your payoff time
- For example, on a $10,000 balance at 18% APR, paying $250/month takes 62 months (5+ years) and costs $5,432 in interest
- Increasing that to $300/month cuts it to 47 months and saves $1,681 in interest
Total interest paid is calculated as:
Total Interest = (Monthly Payment × Number of Months) - Original Balance
This calculator assumes a fixed interest rate and consistent monthly payments. Variable rates, missed payments, or additional charges will change your actual payoff date.
How we build and check this calculator
This calculator runs entirely in your browser, so the numbers you enter stay on your device. The math behind it is written by hand and tested against worked examples and standard references before the page goes live.
SuperGlobalCalculator is independently built and maintained. See how we build and verify our calculators.