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Mortgage Amortization Calculator

Estimate a fixed-rate mortgage payment and see how principal and interest change over time.

Updated April 11, 2026
Free online tool
Planning and research use

Why this page exists

A mortgage payment may look simple on paper, but the mix of principal and interest shifts throughout the life of the loan. This calculator focuses on the amortized loan itself so you can estimate the monthly payment, total interest, total paid, and a simple breakdown of how the schedule behaves over time.

Interactive tool

Run the estimate

Enter your numbers and read the result first, then use the sections below to understand what affects the outcome.

Calculator

Mortgage amortization calculator

Estimate a mortgage payment and see how principal and interest are likely to split over time.

Result

$2,252

Estimated monthly payment and long-term amortization for the fixed-rate loan entered.

Estimated monthly payment$2,252

Total interest paid$450,656

Total amount paid$810,656

Year 1 principal paid$4,101

In the first year, about $22,921 goes to interest and about $4,101 goes to principal.
After 5 years, the remaining balance is about $336,609.
Early payments on a long mortgage usually lean more heavily toward interest, while the principal share grows later in the schedule.

This is a standard amortization estimate for a fixed-rate loan. Taxes, insurance, PMI, and lender-specific details are not included here.

Planning note

Last updated April 11, 2026. Use this tool to compare scenarios and plan ahead, then confirm important details with the lender, employer, insurer, contractor, or other qualified provider involved in the final decision.

How it works

What the calculator is doing

Enter the loan amount, interest rate, and term in years for a fixed-rate mortgage.

The calculator uses standard amortized loan math to estimate the monthly principal-and-interest payment.

It then summarizes the long-term cost of the loan and a simple early-year amortization snapshot.

Understanding your result

This page is most useful when you want to understand the financing side of the mortgage rather than the full housing payment. The early years of a long mortgage usually send more of each payment toward interest, which is why amortization detail can change how different terms feel.

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Examples

Ways people use this tool

Example scenarios help turn a quick estimate into a more useful comparison or planning step.

Compare 15-year and 30-year loans

Use the same loan amount and rate across two terms to see how payment and lifetime interest move together.

See why early payments feel interest-heavy

Review the first-year snapshot to understand how much of the payment goes to interest before principal starts taking a larger share.

Estimate long-run loan cost

Use the total interest result to compare whether a lower rate or shorter term saves more over time.

FAQ

Common questions

Does this include taxes, insurance, or PMI?

No. This calculator focuses on the amortized loan payment only so you can study principal and interest without mixing in other housing costs.

Why is so much of the payment interest at the start?

Because the balance is highest at the beginning of the loan, the interest charge is also highest then. As the balance falls, more of each payment can go toward principal.

Is this useful if I already know my mortgage payment?

Yes. The value here is understanding total interest and how the loan balance changes over time, not just seeing one monthly number.

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Keep comparing

Use these related tools to compare nearby scenarios, check a second estimate, or keep narrowing down the right decision.

Home ToolsUpdated April 11, 2026