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LOAN AMORTIZATION CALCULATOR

Loan Amortization Calculator — Full Payment Schedule & Interest Breakdown

Free US loan amortization calculator. Generate a complete year-by-year payment schedule showing principal, interest, and remaining balance for any fixed-rate loan — plus see how extra payments shorten your term and cut total interest.

1. Loan Details

Total principal you plan to borrow.
Fixed annual rate quoted by the lender.
Common mortgage terms: 15 or 30 years.

2. Extra Payment Options

Applied every period from the starting year onward.

LOAN AMORTIZATION SCHEDULE

Full Repayment Breakdown

Reference: LAM-2026-001
Date:
Loan Amount $250,000.00
Interest Rate 6.50%
Loan Tenure 30 Years
Scheduled Payment $1,580.17
Total Payment $568,861.31
Total Interest $318,861.31

Interest Breakdown

Principal $250,000.00
Interest $318,861.31
Total Cost $568,861.31

Year-by-Year Amortization Schedule

Year Payment Principal Interest Balance
Notes

Amortization schedule for mortgage planning

Educational estimate only. Actual payment schedules may vary by lender and are governed by the promissory note and Truth-in-Lending disclosures. Consult a HUD-approved housing counselor or licensed mortgage professional for personalized advice.
Prepared By
Date
GUIDE

How to Use This Loan Amortization Calculator

This free loan amortization calculator generates a full amortization schedule for any fixed-rate loan. It shows the year-by-year breakdown of principal, interest, and remaining balance, plus your total interest over the life of the loan and payoff date. Use it to plan a home mortgage, auto loan, or personal loan repayment strategy — and see exactly how much extra payments save you.

1

Enter Loan Details

Enter the loan amount, annual interest rate, tenure in years, and payment frequency (monthly, bi-weekly, or weekly).

2

Add Extra Payments

Optionally enter an extra payment and the year it starts to see how much interest you save and how much faster the loan pays off.

3

Review the Summary

See your scheduled payment, total payment, total interest, and (if applicable) interest saved from extra payments.

4

Analyze the Schedule

Review the year-by-year schedule showing how each year's payments split between principal and interest.

5

Save, Print or Export

Save a draft in your browser, print the schedule, or download a PDF for your records.

AMORTIZATION EDUCATION

What Does a Loan Amortization Calculator Calculate?

A loan amortization calculator — also called a mortgage amortization schedule calculator or loan payoff schedule calculator — converts a loan amount, interest rate, and repayment term into a period-by-period payment schedule. It separates each payment into principal and interest and tracks the declining balance until the loan is fully paid off. Where a standard EMI calculator shows only the monthly payment, an amortization calculator shows the full structure of the repayment.

Key amortization calculations

  • Scheduled Payment: The fixed payment per period for a fixed-rate amortizing loan.
  • Interest Portion: The cost of borrowing for each period, calculated on the remaining balance.
  • Principal Portion: The amount of each payment that reduces the loan balance.
  • Remaining Balance: The outstanding principal after each payment.
  • Total Interest: The cumulative cost of borrowing over the loan term.
  • Payoff Date: The period in which the loan balance reaches zero.
  • Extra Payment Savings: The reduction in total interest and loan term from additional payments.

Who can use this loan amortization calculator?

  • Home Buyers and Owners: Understand how a mortgage amortizes and plan extra-payment strategies.
  • Auto Loan Shoppers: Compare loan terms and interest costs across offers.
  • Personal Loan Borrowers: See exactly how much of each payment goes to principal vs. interest.
  • Student Loan Borrowers: Plan repayment strategies for federal and private education loans.
  • Financial Planners and Advisors: Build transparent amortization tables for clients.
  • Investors: Analyze mortgage amortization on investment properties.

Frequently searched amortization scenarios

  • 30-year mortgage amortization schedule — with full principal and interest split.
  • 15-year mortgage amortization schedule — see how much interest a shorter term saves.
  • Bi-weekly mortgage payoff schedule — how 26 half-payments per year shorten the term.
  • Extra payment mortgage calculator — model the effect of additional principal payments.
  • Loan payoff date calculator — know when your loan will be completely repaid.
METHODOLOGY

Loan Amortization Calculator Methodology

MoneyTool uses standard US mortgage mathematics for the amortization schedule. The calculator is designed to be transparent about what it does and does not estimate.

1. Scheduled periodic payment

For a loan with principal P, periodic rate i, and n total payments:

M = P × i × (1 + i)n ÷ ((1 + i)n − 1)

When the periodic interest rate is zero, the payment is P ÷ n. For bi-weekly and weekly frequencies, the periodic rate is the annual rate divided by the number of periods per year.

2. Bi-weekly and weekly US conventions

In the US, a bi-weekly mortgage is typically the monthly payment divided by two, paid every two weeks. This produces 26 payments per year — the equivalent of 13 monthly payments — which accelerates payoff. This calculator models the frequency as a true periodic schedule using the periodic interest rate, which produces a slightly different (and mathematically consistent) payment amount than the conventional "half-monthly" simplification.

3. Extra payments

Any extra payment entered is applied entirely to principal, starting from the first period of the specified starting year. Extra principal reduces the balance immediately, which reduces future interest accrual and shortens the loan term.

4. Total interest and payoff date

Total interest is the sum of all periodic interest amounts until the balance reaches zero. Total payment is the sum of all periodic payments (scheduled plus extra). The payoff date is the period in which the loan balance reaches zero.

5. Year-by-year aggregation

The displayed schedule aggregates all periods within each calendar year of the loan. For a monthly loan, each row shows 12 payments; for bi-weekly, 26; for weekly, 52.

Important assumptions

  • Payments are level for a fixed-rate amortizing loan.
  • Extra payments are applied entirely to principal.
  • Interest accrues at the periodic rate on the remaining balance.
  • No late fees, prepayment penalties, escrow adjustments, or variable-rate changes are modeled.
  • Taxes, insurance, PMI, and HOA fees are separate from the loan payment and are not modeled here.
  • This is an educational estimate, not a regulatory disclosure or a lender payoff quote.
E-E-A-T & SOURCES

Loan Amortization Information, Sources & Editorial Review

MoneyTool separates calculation results from financial education and lender-specific requirements. The calculator uses documented amortization mathematics, while external lending information should be verified with authoritative sources and the lender offering the loan.

Author and editorial responsibility

Methodology reviewed by the MoneyTool Finance Expert Team, a group of accountants, CPAs, and personal-finance analysts who maintain MoneyTool's calculator library and financial education content.

Last reviewed: | Fixed-rate monthly amortization

Next review: When calculation logic, supported inputs, or relevant guidance changes.

This calculator and its educational content are maintained as part of MoneyTool's finance calculator resource library. Methodology is reviewed when the calculation logic or relevant educational guidance changes.

Authoritative U.S. amortization and lending resources

  • Consumer Financial Protection Bureau (CFPB) — Mortgages: CFPB Mortgage Resources covers amortization schedules, closing checklists, and complaint processes.
  • Consumer Financial Protection Bureau (CFPB) — Loan Estimate Explainer: CFPB Loan Estimate Explainer walks through the 3-page Loan Estimate lenders must provide within 3 business days of an application.
  • Consumer Financial Protection Bureau (CFPB) — Owning a Home: CFPB Owning a Home is the official consumer guide to buying and financing a home in the United States.
  • U.S. Department of Housing and Urban Development (HUD): HUD Buying a Home provides federal guidance on homebuying, FHA loans, and HUD-approved housing counseling.
  • Federal Housing Finance Agency (FHFA): FHFA is the regulator of Fannie Mae, Freddie Mac, and the Federal Home Loan Banks.
  • MyMoney.gov (U.S. Financial Literacy and Education Commission): MyMoney.gov is the federal government's central portal for financial literacy resources.
  • Internal Revenue Service (IRS) — Topic 505: Interest Expense: IRS Topic 505 covers the home mortgage interest deduction rules for US taxpayers.
  • Federal Trade Commission (FTC) — Mortgage Shopping: FTC Mortgage Shopping Guide provides consumer guidance on comparing mortgage offers and avoiding deceptive lending.

External resources are provided for education and verification. MoneyTool is not affiliated with or endorsed by the CFPB, HUD, FHFA, IRS, FTC, MyMoney.gov, or any lender linked from this page.

SMART REPAYMENT

Tips for Paying Off Your Loan Faster

Even modest extra payments can meaningfully reduce total interest and shorten a loan. Here are strategies that consistently work for US borrowers.

Understand Your Schedule

Review your amortization schedule to see where interest dominates. Early years are the highest-value time to make extra payments.

Round Up Your Payment

Rounding up to the nearest $50 or $100 per month sends meaningful extra principal without changing your lifestyle much.

Switch to Bi-Weekly

Bi-weekly payments produce one extra monthly payment per year, which can shorten a 30-year mortgage by 4–6 years.

Apply Windfalls to Principal

Tax refunds, bonuses, and gifts applied directly to principal can save thousands in interest over the loan term.

Refinance When Rates Drop

If rates fall at least 0.75% below your current rate, refinancing can reduce interest meaningfully — check closing costs first.

Keep Records

Save annual schedules to track progress and to support any mortgage interest deductions at tax time.

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LEARNING CENTER

Learn More About Loan Amortization

Continue learning about amortization, early payoff strategies, and refinancing.

Amortization Explained

How loan amortization works, how payments are calculated, and how interest is distributed over the loan term.

How to Pay Off Your Loan Early

Proven strategies to pay off your loan faster, including extra payments, bi-weekly payments, and refinancing.

Refinancing Guide

Learn when and how to refinance your loan to save money on interest and reduce your monthly payments.
GLOSSARY

Amortization Terms Glossary

Common terms you will see in an amortization schedule and on a Loan Estimate.

What is amortization?

Amortization is the process of paying off a loan through regular payments that cover both interest and principal. In the early years, more of each payment goes to interest; in the later years, more goes to principal.

What is amortization schedule?

An amortization schedule is a table showing every payment of a loan, with the interest portion, principal portion, and remaining balance listed for each period.

What is a periodic interest rate?

The interest rate applied to each payment period. For a monthly loan, it is the annual rate divided by 12. For a bi-weekly loan, it is the annual rate divided by 26.

What is negative amortization?

Negative amortization occurs when the scheduled payment is smaller than the interest owed, causing the loan balance to increase. Standard fixed-rate amortizing loans do not exhibit negative amortization. This calculator does not model negative-amortization loans.

What is a payoff date?

The payoff date is the period in which the loan balance reaches zero and the loan is fully repaid. Extra payments accelerate the payoff date.

FAQ

Frequently Asked Questions About Loan Amortization

What is loan amortization?

Loan amortization is the process of paying off a loan over time through regular scheduled payments. Each payment covers both interest and principal, with a larger share going toward interest in the early years of the loan.

What is an amortization schedule?

An amortization schedule is a table showing every payment of a loan, detailing how much goes toward principal and interest and the remaining balance after each payment.

Why do I pay more interest at the beginning of a loan?

In the early years of an amortizing loan, the outstanding balance is at its highest, so interest accrues more quickly. As principal is paid down, the interest portion of each payment decreases and more goes toward principal.

How do extra payments affect my loan?

Extra payments go directly toward reducing the principal balance. This reduces the total interest paid and can significantly shorten the loan term. Even a small recurring extra payment can save thousands of dollars over the life of a mortgage.

Are bi-weekly payments better than monthly?

Bi-weekly payments in the US are typically half of the monthly payment paid every two weeks. Because there are 26 bi-weekly periods in a year, the borrower effectively makes 13 monthly payments instead of 12, which accelerates payoff and reduces total interest.

Is this loan amortization calculator free?

Yes. MoneyTool provides this loan amortization calculator free for educational and planning use.

Can I save my amortization schedule?

Yes. Save Draft stores the calculator inputs in your browser. Print Schedule and Download PDF can be used to keep a copy of the displayed amortization schedule.

LEGAL

Loan Amortization Calculator Disclaimer

This loan amortization calculator provides estimates for informational and educational purposes. It does not constitute financial, legal, tax, accounting, or lending advice. Actual amortization schedules, interest accrual, and payoff timing depend on the promissory note, the lender's posting rules, and any applicable regulatory disclosures.

  • Estimates only: Results depend on the inputs and assumptions described in the methodology.
  • Not a payoff quote: Only the lender can provide an official payoff statement.
  • Escrow excluded: Taxes, insurance, PMI, and HOA fees are not part of the amortization calculation.
  • Verify before borrowing: Confirm the schedule with your lender and review the Loan Estimate and closing documents.
Last methodology review: . Calculator logic and educational content should be reviewed again whenever the methodology, supported inputs, or relevant external guidance changes.