A larger down payment or shorter term both reduce this loan's total interest.
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Disclaimer
This calculator provides estimates for informational purposes only and does not constitute financial, medical, legal, or tax advice. Always consult a qualified professional about your specific situation.
How This Calculator Works
A fixed loan payment (sometimes called an EMI, for “Equated Monthly Installment”) is calculated
from the loan amount, interest rate, and term using the standard amortization formula. Enter
those three figures and this calculator shows your fixed monthly payment — plus how much you’ll
pay in total over the life of the loan and how much of that is interest.
This works for any fixed-rate installment loan with a monthly payment schedule — a personal
loan, an auto loan, or similar — not just a mortgage. If you’re financing a home specifically,
the dedicated Mortgage Calculator adds extra-payment scenarios and other home-loan-specific
detail this general-purpose version doesn’t.
The Formula
The standard fixed-rate amortization formula:
M=P×(1+r)n−1r(1+r)n
where M is the monthly payment, P is the loan principal, r is the monthly
interest rate (the annual rate divided by 12), and n is the total number of monthly
payments (the term in months).
Worked Example
A $20,000 loan at 8% annual interest over 60 months (5 years):
Monthly rate: r=8%÷12≈0.667%.
Applying the formula gives a monthly payment of about $405.53.
Over the full 60 months, that’s about $24,331.67 paid in total — roughly $4,331.67 of
which is interest on top of the amount borrowed.
Common Mistakes
Confusing the interest rate with the APR. The rate used here drives the monthly payment, but
a real loan offer’s APR (which folds in origination fees and other upfront costs) is usually
higher and is the more accurate number for comparing two competing loan offers.
Assuming an extra payment shortens the term automatically. Making one extra payment reduces
the remaining balance, which shortens the payoff time — but only if the loan is actually
recast or the extra amount keeps being applied every month; a single one-time extra payment alone
doesn’t change the required minimum payment going forward.
Not checking for a prepayment penalty. Some loans charge a fee for paying off the balance
early — this calculator assumes extra payments go straight to reducing the balance with no
penalty, which isn’t true for every loan.
Cómo funciona esta calculadora
Un pago de préstamo fijo (a veces llamado EMI, siglas en inglés de “Equated Monthly
Installment”, o cuota mensual fija) se calcula a partir del monto del préstamo, la tasa de interés
y el plazo, usando la fórmula estándar de amortización. Ingresa esas tres cifras y esta
calculadora muestra tu pago mensual fijo — además de cuánto pagarás en total durante la vida del
préstamo y cuánto de eso es interés.
Esto funciona para cualquier préstamo a plazos con tasa fija y un calendario de pago mensual — un
préstamo personal, un préstamo de auto, o similar — no solo una hipoteca. Si estás financiando
específicamente una vivienda, la Mortgage Calculator dedicada agrega escenarios de pago
adicional y otros detalles específicos de préstamos hipotecarios que esta versión de propósito
general no incluye.
La fórmula
La fórmula estándar de amortización a tasa fija:
M=P×(1+r)n−1r(1+r)n
donde M es el pago mensual, P es el capital del préstamo, r es la tasa de
interés mensual (la tasa anual dividida entre 12), y n es el número total de pagos
mensuales (el plazo en meses).
Ejemplo resuelto
Un préstamo de $20,000 al 8% de interés anual durante 60 meses (5 años):
Tasa mensual: r=8%÷12≈0.667%.
Al aplicar la fórmula se obtiene un pago mensual de aproximadamente $405.53.
A lo largo de los 60 meses completos, eso equivale a aproximadamente $24,331.67 pagados en
total — de los cuales cerca de $4,331.67 son intereses sobre el monto prestado.
Errores comunes
Confundir la tasa de interés con la APR. La tasa utilizada aquí determina el pago mensual,
pero la APR (Tasa de Porcentaje Anual) de una oferta de préstamo real — que incorpora comisiones
de originación y otros costos iniciales — suele ser más alta y es la cifra más precisa para
comparar dos ofertas de préstamo distintas.
Suponer que un pago adicional acorta el plazo automáticamente. Hacer un pago adicional
reduce el saldo restante, lo cual acorta el tiempo de pago — pero solo si el préstamo realmente
se recalcula (recast) o el monto adicional se sigue aplicando cada mes; un único pago adicional
puntual no cambia por sí solo el pago mínimo requerido de ahí en adelante.
No verificar si hay una penalización por pago anticipado. Algunos préstamos cobran una
comisión por liquidar el saldo antes de tiempo — esta calculadora asume que los pagos
adicionales se destinan directamente a reducir el saldo sin penalización, lo cual no es cierto
para todos los préstamos.
EMI stands for Equated Monthly Installment — the standard term for a loan's fixed monthly payment, which stays the same every month even though the interest/principal split within it changes over time.
How is this different from the Mortgage Calculator?
The underlying math is the same fixed-rate amortization formula, but this calculator is built for shorter, smaller loans quoted in months (personal loans, auto loans) rather than a multi-decade home loan, and doesn't include Mortgage Calculator's extra-payment and PMI-adjacent detail.
Does this include fees or the APR?
No — this calculates payment based on the interest rate you enter. A loan's Annual Percentage Rate (APR) often includes additional fees and can be meaningfully higher than the stated interest rate, so compare APRs when shopping between lenders, not just rates.
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