Accurate Amortization
We model daily interest accrual from your APR and payment schedule, approximating common issuer formulas so your timeline is realistic.
Our mission is simple: make it effortless to understand how long it takes to pay off credit card debt—and exactly how much interest you can avoid by adjusting payments. No sign‑ups, no paywalls, just a fast tool and clear explanations.
We model daily interest accrual from your APR and payment schedule, approximating common issuer formulas so your timeline is realistic.
Model extra payments, lump sums, multiple cards, and strategy choices (avalanche vs snowball) to see how timelines and interest shift.
We show payoff month, total interest, and per‑month projections, plus tips to reduce average daily balance.
Issuers use a daily periodic rate (APR ÷ 365) and compute finance charges on the average daily balance. We approximate this method and assume payments are applied first to interest and fees, then to principal—consistent with most agreements. Your results may vary slightly due to statement cycles or issuer‑specific rules, so always verify against your statements.
Explanations on this site are written in plain language and reviewed for clarity. We avoid jargon when possible and link out to helpful resources. Educational content is not individualized financial advice.
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Updated Sep 29, 2025