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Mortgage Amortization Calculator & Schedule

Written by Calcida Team
Reviewed for accuracy and clarity
Last updated: April 2026

See a detailed mortgage amortization schedule. Track how much of each payment goes toward principal vs interest and see your loan balance over time.

This calculator is useful for homeowners who want to see principal vs. interest over time. You will typically enter Loan amount, Interest rate, Loan term, Start date (optional).

The result represents full amortization schedule and totals for interest paid. If you are browsing similar tools, start with Mortgage Calculators or view the full calculators directory.

Also useful: Mortgage Payment Calculator with Taxes and Insurance, Extra Mortgage Payment Calculator: Pay Off Early.

Enter purchase price before closing costs.

20% down avoids PMI in many cases.

Shorter terms increase payment but cut total interest.

Taxes & Fees

If percent, we estimate based on home price.

Estimated Monthly Payment

$2,523
You save $0 in interest!
You will pay off your mortgage 30 years and 0 months sooner.

Payment Breakdown

Detailed Costs (Monthly)

Principal & Interest$2,023
Property Tax$400
Home Insurance$100
HOA Fees$0
Total Monthly$2,523

Key Insights

  • Over the life of this 30-year loan, you will pay a total of $408,142 in interest.
  • Your loan-to-value (LTV) ratio is 80.0%. Great job! With a down payment of 20% or more, you avoid PMI costs.
  • For every $10,000 you increase your down payment, your monthly payment decreases by approximately $63.

Want to pay off your mortgage faster?

See how extra payments can shorten your loan and save interest.

Extra Payments →
Biweekly PaymentsPayoff Analysis

How This Calculator Works

An amortization schedule is a table that shows each periodic payment on an amortizing loan. It breaks down each payment into interest and principal and shows the remaining balance after each payment.

Formula

Balance_k = P(1 + i)^k − M × [ ( (1 + i)^k − 1 ) / i ]
Where:
  • Balance_k = remaining balance after k payments
  • P = principal (loan amount)
  • i = monthly interest rate
  • M = monthly payment (from amortization formula)
  • k = payment number (month)
Interest each month is Balance × i; principal is M − interest.

Example Calculation

Loan amount$250,000
Interest rate5.50%
Loan term30 years
First payment (principal vs. interest)
≈ $197 principal, ≈ $1,146 interest
Early payments are interest-heavy; principal share grows over time.

Understanding Mortgage Amortization

When you first start paying off a mortgage, most of your payment goes toward interest. As the balance decreases, more of your payment goes toward principal. This process is called amortization.

Frequently Asked Questions

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