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Mortgage Calculator — Monthly Payment & Amortization

$
%
Monthly Payment
$1,896.20
Principal
$300,000.00
Total Interest
$382,633.47
Total Paid
$682,633.47
Principal (43.95%)Interest (56.05%)
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Estimate Your Mortgage Payment Instantly

Our free mortgage calculator helps you estimate monthly payments for a home loan. Enter your loan amount, interest rate, and term to see your payment breakdown, total interest cost, and a full year-by-year amortization schedule — all calculated privately in your browser.

Understanding Your Mortgage Payment

A fixed-rate mortgage payment consists of two parts: principal (paying down what you borrowed) and interest (the cost of borrowing). In the early years, most of your payment goes toward interest. As you pay down the balance, the interest portion shrinks and more goes toward principal — this is called amortization.

Common Mortgage Terms Compared

TermMonthly PaymentTotal InterestBest For
15 yearsHigherMuch lowerFaster equity building, lower total cost
20 yearsModerateModerateBalance between payment size and interest savings
30 yearsLowestHighestMaximum cash flow flexibility

Tips for Getting the Best Mortgage Rate

  • Improve your credit score — A higher score typically qualifies you for lower interest rates
  • Compare multiple lenders — Rates can vary significantly between banks, credit unions, and online lenders
  • Consider the APR — The annual percentage rate includes fees and gives a more accurate cost comparison
  • Make a larger down payment — Putting down 20% or more often means better rates and no PMI
  • Lock your rate — Once you find a good rate, ask about a rate lock to protect against increases before closing

Extra Payments Can Save Thousands

Making even small extra payments toward your principal can dramatically reduce your total interest cost and shorten your loan term. For example, adding just $100/month to a $300,000 mortgage at 6.5% can save you over $50,000 in interest and pay off the loan nearly 5 years early.

Frequently Asked Questions

How is the monthly mortgage payment calculated?
The monthly payment is calculated using the standard amortization formula: M = P × r(1+r)^n / ((1+r)^n − 1), where P is the principal loan amount, r is the monthly interest rate, and n is the total number of monthly payments. This ensures each payment covers both interest and principal reduction.
What is an amortization schedule?
An amortization schedule is a table showing how each payment is split between principal and interest over the life of the loan. In the early years, most of your payment goes toward interest. Over time, a larger portion goes toward paying down the principal balance.
Does this include property taxes and insurance?
No. This calculator shows only the principal and interest (P&I) portion of your mortgage payment. Your actual monthly housing cost will also include property taxes, homeowner's insurance, and possibly private mortgage insurance (PMI) or HOA fees.
How does the interest rate affect my payment?
Even small changes in interest rate significantly impact total cost. For example, on a $300,000 30-year mortgage, a 1% rate increase (from 6% to 7%) adds roughly $200/month to your payment and over $70,000 in total interest over the life of the loan.
Should I choose a 15-year or 30-year mortgage?
A 15-year mortgage has higher monthly payments but dramatically lower total interest — often less than half the interest of a 30-year loan. A 30-year mortgage offers lower monthly payments and more cash flow flexibility. Use the term selector to compare both options side by side.
Is my data private?
Yes. All calculations happen entirely in your browser. We do not store your loan amount, interest rate, or any other financial information. Nothing is sent to any server.
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