CALCIDA

Mortgage Amortization Calculator & Schedule

Written by Calcida Team
Reviewed by Financial Review Process
Last updated: April 2026

Calculations are rooted in standard financial formulas and are provided as educational estimates only. They do not constitute professional financial advice. Results may vary based on actual interest rates and fees. You should verify all numbers with a certified financial professional prior to making significant financial commitments. Read our editorial commitment →

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

Built specifically for Homeowners who want to see principal vs. interest over time., this engine analyzes Loan amount, Interest rate, Loan term, Start date (optional) to output full amortization schedule and totals for interest paid..

Context:Mortgage CalculatorsMain DirectoryMortgage Payment Calculator with Taxes and InsuranceExtra 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
Save $0
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 $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.
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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.

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Formula

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

Example Calculation

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

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Continue Your Analysis

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