Debt Payoff Calculator

Discover how long it will take to become debt-free by calculating your estimated payoff date and total interest.

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Inputs

The Math Behind It

N = -log(1 - (r * balance / pmt)) / log(1 + r)

This formula predicts the exact number of months needed to amortize debt given a fixed payment. It factors in how high-interest balances counteract small monthly payments.

Example

If you owe $10,000 at 18.9% interest and pay $250 a month, it will take you 62 months to be debt-free—and cost you roughly $5,400 in interest alone.

Official Sources & Validity

Calculations verified against current legislation.

Central Bank of Brazil (BACEN)
CMN Resolutions
Applied Financial Mathematics
Valid for: Global Standard

Frequently Asked Questions

If your monthly payment does not cover the monthly interest charge, your debt will grow indefinitely instead of shrinking.

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