How do extra payments reduce total interest?

Making extra payments directly reduces the outstanding principal balance, reducing the base on which future interest is calculated.

Loan & Mortgage Calculator

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Calculate monthly loan payments, total interest costs, and full amortization payoff schedules for mortgages, auto loans, and personal loans.

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Standard Amortization: M = P × [r(1 + r)^n] / [(1 + r)^n - 1]

Understanding Your Results

Calculates monthly principal and interest payment. The amortization schedule illustrates how early loan payments consist heavily of interest, while later payments pay off principal.

Practical Guidance & Next Steps

Compare 15-year vs 30-year terms: while 15-year loans have higher monthly payments, they drastically cut total interest paid over the life of the loan (often saving $100k+ on mortgages).

What is this?

A standard financial amortization engine that computes monthly installment payments, principal reduction, and interest allocation over the life of a loan.

How does it work?

1. Enter the total Loan Amount ($). 2. Input the Annual Interest Rate (%). 3. Select Loan Term in Years or Months. 4. Review the monthly payment, total interest, and interactive amortization schedule.

Why use it?

Understand the true cost of borrowing before signing loan agreements, compare 15-year vs 30-year mortgages, and plan early payoff strategies.

Technical Scope & Calculation Limitations

Calculates standard fixed-rate amortizing loans. Does not include property taxes, homeowners insurance (PITI), HOA dues, or private mortgage insurance (PMI).

Frequently Asked Questions

Amortization is the process of spreading out a loan into a series of equal periodic payments. Early payments consist mostly of interest, while later payments pay off primarily principal.

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