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Amortization Schedule Calculator — Free 2026

Generate a full loan amortization schedule with monthly principal, interest, and balance breakdown.

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Loan Summary

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Monthly Payment
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Total Interest
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Total Paid
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Payoff Date

Amortization Schedule

How It Works

  1. Enter your loan details
  2. View the payment summary
  3. Review the amortization table
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Understanding Loan Amortization

Amortization is the process of gradually paying off a loan through regular scheduled payments that cover both principal and interest. An amortization schedule provides a detailed, period-by-period breakdown of each payment, showing exactly how much goes toward reducing the principal versus paying interest charges. This transparency helps borrowers understand the true cost of their loan and make informed decisions about prepayment strategies.

This free amortization schedule calculator generates a complete month-by-month table for any fixed-rate loan. Whether you have a mortgage, auto loan, personal loan, or student loan, enter your terms and instantly see your payment breakdown. The calculator also supports extra payments, showing you how additional principal payments can shorten your loan term and reduce total interest paid.

How the Amortization Formula Works

The monthly payment for a fixed-rate amortizing loan is calculated using the formula: M = P[r(1+r)^n] / [(1+r)^n - 1], where M is the monthly payment, P is the principal (loan amount), r is the monthly interest rate (annual rate divided by 12), and n is the total number of monthly payments (years times 12). For a $250,000 loan at 6.5% for 30 years, this produces a monthly payment of approximately $1,580.17, and you would pay approximately $318,861 in total interest over the life of the loan.

Each month, interest is calculated on the remaining balance. The first payment on the $250,000 example at 6.5% includes $1,354.17 in interest and only $225.99 in principal reduction. By the final year, nearly the entire payment goes toward principal. This front-loading of interest is inherent to amortized loans and explains why early extra payments are so powerful at reducing total interest costs.

The Impact of Extra Payments

Making extra payments beyond the required monthly amount accelerates your loan payoff by reducing the outstanding principal faster. Since interest is calculated on the remaining balance, a lower principal means less interest accrues each month, creating a compounding savings effect. On a $250,000 mortgage at 6.5% for 30 years, adding just $200 per month in extra payments saves approximately $107,000 in interest and pays off the loan nearly 8 years early. Use our mortgage calculator for USA-specific housing cost analysis.

When making extra payments, ensure your lender applies them to principal reduction rather than advancing your next due date. Some lenders require you to specify that extra payments should go toward principal. Review your loan agreement or contact your servicer to confirm their extra payment policy. You can also explore our loan calculator for more general debt analysis.

For informational purposes only. This calculator provides estimates based on fixed-rate assumptions. Actual loan terms, fees, and tax implications may vary. Consult a qualified financial advisor or mortgage professional before making loan decisions.

Frequently Asked Questions

What is an amortization schedule?
An amortization schedule is a complete table showing each periodic loan payment broken down into principal and interest components, along with the remaining balance after each payment. It shows how the proportion of each payment allocated to interest decreases over time while the principal portion increases, even though the total payment amount stays the same.
How is my monthly loan payment calculated?
Monthly loan payments are calculated using the standard amortization formula: M = P[r(1+r)^n] / [(1+r)^n - 1], where P is the loan amount, r is the monthly interest rate (annual rate divided by 12), and n is the total number of payments. For a $250,000 loan at 6.5% for 30 years, the monthly payment is approximately $1,580.17.
How do extra payments affect my loan payoff?
Extra payments go directly toward reducing the principal balance, which decreases future interest charges. Even a modest extra payment of $100 per month on a $250,000 mortgage at 6.5% can save over $60,000 in interest and pay off the loan about 5 years early. The earlier you start making extra payments, the more you save due to the compounding effect.
Why do I pay more interest at the beginning of a loan?
Interest is calculated on the outstanding balance each month. At the start of a loan, the balance is at its highest, so a larger portion of each payment goes to interest. As you pay down the principal over time, less interest accrues each month and more of your fixed payment goes toward principal. On a 30-year mortgage, you may pay mostly interest for the first 15-20 years before principal reduction accelerates significantly.

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