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Mortgage Amortization Calculator

Use this mortgage amortization calculator to compare payment, payoff, or borrowing scenarios for mortgage amortization.

Primary answer
Monthly payment
Inputs to verify
Loan amount, Annual interest rate, and Loan term
Use type
Use as an estimate that depends on assumptions.
Keyword intent
mortgage amortization calculator

Calculator

Mortgage Amortization Calculator

Calculates monthly payment from loan amount, annual interest rate, loan term. Defaults are filled in so you can review a working example before changing inputs.

USD

Mortgage principal balance to amortize.

%

Use 6.5 for 6.5%. The calculator divides this by 12 for the monthly periodic rate.

years

Whole number of years in the amortization schedule.

Result

Result reflects the current submitted inputs.

  • Risk B
  • Reviewed 2026-05-26
  • 3 sources
Monthly payment2,022.62 USD
Total principal and interest728,142.36 USD
Total interest408,142.36 USD
First payment interest1,733.33 USD
First payment principal289.28 USD
Balance after first payment319,710.72 USD
Final payment2,022.62 USD
Final payment interest10.9 USD
Final payment principal2,011.72 USD
Number of payments360
Monthly periodic rate0.541667%

Breakdown

Monthly periodic rate
0.5417%
Number of payments
360
First payment principal
289.28 USD
First payment interest
1,733.33 USD
  • The mortgage is fixed-rate, fully amortizing, and paid monthly at the end of each period.
  • Annual interest rate input is treated as a nominal annual rate divided by 12.
  • The schedule summary uses unrounded balances internally and rounds displayed row values to cents.
  • Taxes, insurance, escrow, fees, prepayment penalties, extra payments, and lender-specific final-payment adjustments are excluded.
  • This is an educational estimate, not financial advice, a lender quote, underwriting approval, or a legal mortgage disclosure.

Accuracy notes

Risk level
B
Reviewed
2026-05-26
Sources
3
Primary result
Monthly payment

Formula logic is kept in a pure calculator module with fixtures, source notes, and page-visible assumptions.

Categories

What the result means

Use Monthly payment as the headline answer for mortgage amortization. Fixed monthly principal-and-interest payment. Read the payment or payoff number first, then compare interest, balance, and timing outputs before changing a loan decision. Use total principal and interest, total interest, and first payment interest to explain why monthly payment moved when an input changed. Run at least one conservative and one optimistic scenario before comparing with a real quote or statement.

Monthly paymentFixed monthly principal-and-interest payment.
Total principal and interestUnrounded monthly payment multiplied by the number of payments.
Total interestTotal principal-and-interest payments minus loan amount.
First payment interestInterest portion of the first scheduled payment.

Use the result this way

  1. Start with Monthly payment, then use supporting outputs only to explain the primary answer.
  2. Verify loan amount, annual interest rate, and loan term before copying the result.
  3. Keep units consistent with the labels shown in the form, stay within the documented minimum and maximum ranges, and enter percentages as whole percents, such as 6.5 for 6.5%, unless a field says otherwise.
  4. Run at least one conservative and one optimistic scenario before comparing with a real quote or statement.

User job

How to use this calculator

Use Mortgage Amortization Calculator when you need monthly payment, then use total principal and interest and total interest to check the context for planning conversations, quote comparisons, payment checks, and scenario review.

Best for

  • Comparing one financial scenario with another
  • Preparing questions for a lender, advisor, or statement review
  • Reviewing a default example before entering your own loan amount and annual interest rate.

Check before relying

  • Verify rates, fees, timing, taxes, and local rules against official documents before acting.
  • The mortgage is fixed-rate, fully amortizing, and paid monthly at the end of each period.
  • Annual interest rate input is treated as a nominal annual rate divided by 12.
  • Source context: Consumer Financial Protection Bureau, reviewed 2026-05-26.

Next useful step

  • Amortization CalculatorUse next when the borrowing comparison needs amortization inputs such as loan amount and annual rate.
  • Home Equity Loan CalculatorUse next when the borrowing comparison needs home equity loan inputs such as home value and current mortgage balance.
  • Mortgage CalculatorUse next when the borrowing task needs estimated total monthly payment instead of monthly payment.

Formula

The monthly mortgage payment uses the fixed amortized-loan formula. Each amortization row applies monthly interest to beginning balance, then applies the remainder of the payment to principal. Key assumptions: The mortgage is fixed-rate, fully amortizing, and paid monthly at the end of each period. Annual interest rate input is treated as a nominal annual rate divided by 12. The schedule summary uses unrounded balances internally and rounds displayed row values to cents.

  • The monthly mortgage payment uses the fixed amortized-loan formula. Each amortization row applies monthly interest to beginning balance, then applies the remainder of the payment to principal.
  • The mortgage is fixed-rate, fully amortizing, and paid monthly at the end of each period.
  • Annual interest rate input is treated as a nominal annual rate divided by 12.
  • Primary source context: Consumer Financial Protection Bureau.

Inputs

Enter loan amount, annual interest rate, and loan term for planning conversations, scenario checks, and lender or statement comparison. Before calculating, keep units consistent with the labels shown in the form, stay within the documented minimum and maximum ranges, and enter percentages as whole percents, such as 6.5 for 6.5%, unless a field says otherwise. Loan amount: Mortgage principal balance to amortize. Annual interest rate: Use 6.5 for 6.5%. The calculator divides this by 12 for the monthly periodic rate. Loan term: Whole number of years in the amortization schedule.

Loan amountMortgage principal balance to amortize.
Annual interest rateUse 6.5 for 6.5%. The calculator divides this by 12 for the monthly periodic rate.
Loan termWhole number of years in the amortization schedule.

Example

Using the default inputs, Mortgage Amortization Calculator returns monthly payment of 2,022.62 USD. Adjust loan amount, annual interest rate, and loan term to match your own scenario.

FAQ

How is monthly payment calculated here?

The monthly mortgage payment uses the fixed amortized-loan formula. Each amortization row applies monthly interest to beginning balance, then applies the remainder of the payment to principal. The first assumption to check is: The mortgage is fixed-rate, fully amortizing, and paid monthly at the end of each period.

What does Monthly payment mean for mortgage amortization?

Read the payment or payoff number first, then compare interest, balance, and timing outputs before changing a loan decision. Secondary values such as total principal and interest, total interest, and first payment interest are there to explain the primary answer, not to replace it.

What should I enter for Loan amount?

Mortgage principal balance to amortize. Use USD for this field. Keep units consistent with the labels shown in the form, stay within the documented minimum and maximum ranges, and enter percentages as whole percents, such as 6.5 for 6.5%, unless a field says otherwise.

How does Annual interest rate change monthly payment?

Use 6.5 for 6.5%. The calculator divides this by 12 for the monthly periodic rate. Changing it can alter monthly payment because the formula uses the submitted inputs together. Also compare APR period, compounding, fees, payment timing, taxes, insurance, and extra-payment assumptions.

Why does the mortgage amortization example show 2,022.62 USD for monthly payment?

The default inputs produce 2,022.62 USD for monthly payment. Treat that as a format and scale check, then replace every default value with your own inputs.

What should I compare before using the mortgage amortization payment result?

Compare the rate period, payment timing, fees, taxes, escrow items, payoff assumptions, and the actual quote or statement that governs the decision.

Sources

Last reviewed: 2026-05-26

  • Reviewed 2026-05-26
    How does paying down a mortgage work?Consumer Financial Protection Bureau. Amortization behavior, interest/principal split, and declining balance explanation.
    Scope
    U.S. consumer guidance explaining mortgage principal, interest, and amortization over time.
    Supports
    Amortization behavior, interest/principal split, and declining balance explanation.
  • Reviewed 2026-05-26
    How do mortgage lenders calculate monthly payments?Consumer Financial Protection Bureau. Fixed-rate monthly mortgage payment assumptions and CFPB example for a $100,000 30-year mortgage at 4%.
    Scope
    U.S. consumer guidance for fixed-rate mortgage principal-and-interest payments and loan-term assumptions.
    Supports
    Fixed-rate monthly mortgage payment assumptions and CFPB example for a $100,000 30-year mortgage at 4%.
  • Reviewed 2026-05-26
    PMT functionMicrosoft Support. Fixed monthly payment formula, monthly rate consistency, end-of-period payment timing, and exclusion of taxes, reserve payments, and fees from the payment function.
    Scope
    Financial function documentation for constant-payment, constant-interest loans.
    Supports
    Fixed monthly payment formula, monthly rate consistency, end-of-period payment timing, and exclusion of taxes, reserve payments, and fees from the payment function.

Disclaimer

This borrowing calculator is for educational payment and payoff estimates only. It is not a lender quote, credit approval, legal disclosure, tax advice, or a substitute for reviewing contracts, fees, escrow items, and local rules.