Debt Payoff Calculator: See What Each Payment Really Costs

Enter a balance, an interest rate and a monthly payment, and this tells you two things: how many months until it is gone, and how much of what you pay is interest. The second number is the one that changes behavior.

If you would rather not enter anything, the tables below give you the answer directly.

$20,000 at 24.99% APR — four payment levels

Going from the minimum to $750 a month saves $30,570. Going from $500 to $750 saves $13,926. This is the single most useful comparison on this site, and it is why the payment amount matters more than the payoff method.

$10,000 at 24.99% APR

Minimum payments only, by balance, at 24.99%

Every one of those rows pays more in interest than the original balance. See why the minimum payment is the problem.

Why two calculators disagree about the same debt

Because “minimum payment” is not one formula. The two common ones:

• Interest plus 1% of the balance, with a floor of around $35. This is the more common structure today, and it is the one used in the tables above.
• A flat percentage of the balance, often 2%, with the interest included inside it.

On $20,000 at 24.99%, the first gives 28.4 years and $40,062 in interest. The second gives 15.9 years and $20,287. Both are correct arithmetic; they are different products. Your card’s formula is in your cardholder agreement, and if you want an accurate projection you need to know which one you have.

This is also why the “minimum payment warning” box on your statement may not match an online calculator. It is using your actual formula.

How to use this to make a decision

Three comparisons worth running:

1. Your current payment vs. your current payment plus $100. Most people underestimate this by a wide margin. On $20,000 at 24.99%, $100 more a month is worth years and thousands.

2. Your card vs. a consolidation offer. Run the card at the payment you can actually make, then run the loan at its APR and term. The rule of thumb, which the tables demonstrate: a loan at a rate near your card rate saves nothing. See whether consolidating would beat this.

3. Your rate vs. your rate after a hardship program. A call to your issuer can change the input, which is often a bigger lever than anything else on this page.

What the calculator assumes

Being explicit, because these assumptions are why real results differ:

• No new charges on the account. Any new spending changes everything, and it is the most common reason a real payoff runs longer than projected.
• A fixed APR. Variable rates move, and a missed payment can trigger a penalty rate.
• Interest compounded monthly, payments applied at the end of each period.
• No fees. Annual fees, late fees and balance transfer fees are not included.
• Payments applied to the balance shown. If you carry both a purchase balance and a promotional balance, real payment allocation rules apply and are more complex.

ESPECIFICACIÓN PARA EL DESARROLLADOR (no publicar)

La página necesita una calculadora interactiva además del texto. Requisitos:

Entradas: saldo · APR · pago mensual · (opcional) modo «pago mínimo» con selector de fórmula (interés + 1% con suelo $35 / 2% del saldo).

Salidas: meses hasta cero (y años con un decimal) · intereses totales · total pagado · gráfico de saldo decreciente · una frase de comparación automática («$100 más al mes ahorra $X y Y meses»).

Modo multi-deuda (segunda pestaña): hasta 10 deudas con saldo/APR/mínimo, presupuesto mensual total, y comparación snowball vs avalanche devolviendo meses e intereses de cada uno, más la diferencia. Es la funcionalidad que sostiene el artículo de métodos y ninguna calculadora de la competencia la presenta como comparación directa.

Reglas duras:

• Cálculo en cliente. Sin backend, sin cookies de datos financieros, sin envío de nada. No se pide email.
• Correctitud verificable: con saldo 20.000, APR 24,99 y pago 600 debe devolver 58 meses y $14.489. Con mínimo interés + 1%, 341 meses y $40.062. Si no cuadra al dólar, la implementación está mal. Los demás casos de prueba están en _datos-calculados.md.
• Si el pago es menor o igual al interés del primer mes, no devolver «nunca»: devolver el mensaje de que el saldo crece, y el pago mínimo que lo detendría.
• Exportar a CSV. La demanda medida incluye excel, google sheets y spreadsheet como sufijos frecuentes de esta consulta: una descarga cubre esa intención sin necesidad de una página aparte.

Frequently asked questions

How long will it take me to pay off my debt? It depends on the balance, the APR and the payment. On $20,000 at 24.99%: 28.4 years on minimum payments, 7.2 years at $500 a month, 3.3 years at $750.

How much of my minimum payment goes to interest? On a $20,000 balance at 24.99%, about $417 a month is interest. A minimum payment structured as interest plus 1% of the balance would be roughly $617, meaning about two-thirds of it services interest.

Why does my card’s payoff estimate differ from this calculator? Your statement uses your card’s actual minimum payment formula, which differs between issuers. The two common formulas produce answers 12 years apart on the same $20,000 balance.

Does paying twice a month pay off debt faster? Slightly, on accounts where interest accrues daily, because the average daily balance is lower. The effect is real but small compared with increasing the total monthly amount.

What is a good monthly payment to aim for? Enough to clear the balance within about three years, if your budget allows it. Beyond five years on high-rate revolving debt, the total interest starts to rival the balance and other tools deserve consideration.

Results are estimates based on the figures you enter, assume no additional charges and a fixed rate, and exclude fees. Not individual financial advice.