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Debt payoff examples

Worked debt-payoff timelines for the most-searched combinations of starting balance, APR, and monthly payment. Each page shows total months, total interest, year-by-year amortization, and what happens when you accelerate payments by $50 or $100 per month. For multi-debt scenarios, use our debt snowball calculator.

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How these are calculated

All examples use standard amortization math: monthly interest accrues at APR ÷ 12, and your payment is split between interest (the larger share early on) and principal (the larger share later). Months-to-payoff is computed by the closed-form formula n = -ln(1 - (r × P) / PMT) / ln(1 + r), where r is the monthly rate.

Some lenders use daily interest accrual instead of monthly, which produces slightly higher totals. Real-world payoff also depends on whether you skip a payment (extends the timeline), make extra payments (shortens it), or have variable rates (most credit cards adjust APR with prime rate changes).

For the strategy behind multi-debt payoff, read The Snowball Method of Paying Off Debt — covers snowball vs avalanche, the Northwestern Kellogg behavioral research, and after-debt wealth building.