Mortgage Calculator

Home Price 
Down Payment
Loan Termyears
Interest Rate 
Start Date

 Annual Tax & Cost
Property Taxes
Home Insurance
PMI Insurance
Other Costs
Please provide a positive property taxes value.

The Mortgage Calculator helps estimate the monthly payment due along with other financial costs associated with mortgages. There are options to include extra payments or annual percentage increases of common mortgage expenses. The calculator is mainly intended for use by U.S. residents.


A mortgage is a loan secured by property, usually real estate property. Lenders define it as the money borrowed to pay for real estate. In essence, the lender helps the buyer pay the seller of a house, and the buyer agrees to repay the money borrowed over a period of time, usually 15 or 30 years in the U.S. Each month, a payment is made from buyer to lender. A portion of the monthly payment is called the principal, which is the original amount borrowed. The other portion is interest, which is the cost paid to the lender for using the money. There may be an escrow account involved to cover the cost of property taxes and insurance. The buyer cannot be considered the full owner of the mortgaged property until the last monthly payment is made. In the U.S., the most common mortgage loan is the conventional 30-year fixed-interest loan, which represents 70% to 90% of all mortgages. Mortgages are how most people are able to own homes in the U.S.

Mortgage Calculator Components

A mortgage usually includes the following key components. These are also the basic components of a mortgage calculator.

Costs Associated with Home Ownership and Mortgages

Monthly mortgage payments usually comprise the bulk of the financial costs associated with owning a house, but there are other important costs to keep in mind. These costs are separated into two categories, recurring and non-recurring.

Recurring Costs

Most recurring costs persist throughout and beyond the life of a mortgage. They are a significant financial factor. Property taxes, home insurance, HOA fees, and other costs increase with time as a byproduct of inflation. In the calculator, the recurring costs are under the "Include Options Below" checkbox. There are also optional inputs within the calculator for annual percentage increases under "More Options." Using these can result in more accurate calculations.

Non-Recurring Costs

These costs aren't addressed by the calculator, but they are still important to keep in mind.

Early Repayment and Extra Payments

In many situations, mortgage borrowers may want to pay off mortgages earlier rather than later, either in whole or in part, for reasons including but not limited to interest savings, wanting to sell their home, or refinancing. Our calculator can factor in monthly, annual, or one-time extra payments. However, borrowers need to understand the advantages and disadvantages of paying ahead on the mortgage.

Early Repayment Strategies

Aside from paying off the mortgage loan entirely, typically, there are three main strategies that can be used to repay a mortgage loan earlier. Borrowers mainly adopt these strategies to save on interest. These methods can be used in combination or individually.

  1. Make extra payments—This is simply an extra payment over and above the monthly payment. On typical long-term mortgage loans, a very big portion of the earlier payments will go towards paying down interest rather than the principal. Any extra payments will decrease the loan balance, thereby decreasing interest, and allowing the borrower to pay off the loan earlier in the long run. Some people form the habit of paying extra every month, while others pay extra whenever they can. There are optional inputs in the Mortgage Calculator to include many extra payments, and it can be helpful to compare the results of supplementing mortgages with or without extra payments.
  2. Biweekly payments—The borrower pays half the monthly payment every two weeks. With 52 weeks in a year, this amounts to 26 payments or 13 months of mortgage repayments during the year. This method is mainly for those who receive their paycheck biweekly. It is easier for them to form a habit of taking a portion from each paycheck to make mortgage payments. Displayed in the calculated results are biweekly payments for comparison purposes.
  3. Refinance to a loan with a shorter term—Refinancing involves taking out a new loan to pay off an old loan. In employing this strategy, borrowers can shorten the term, typically resulting in a lower interest rate. This can speed up the payoff and save on interest. However, this usually imposes a larger monthly payment on the borrower. Also, a borrower will likely need to pay closing costs and fees when they refinance.

Reasons for early repayment

Making extra payments offers the following advantages:

Drawbacks of early repayment

However, extra payments also come at a cost. Borrowers should consider the following factors before paying ahead on a mortgage:

Brief History of Mortgages in the U.S.

In the early 20th century, buying a home involved saving up a large down payment. Borrowers would have to put 50% down, take out a three or five-year loan, then face a balloon payment at the end of the term.

Only four in ten Americans could afford a home under such conditions. During the Great Depression, one-fourth of homeowners lost their homes.

To remedy this situation, the government created the Federal Housing Administration (FHA) and Fannie Mae in the 1930s to bring liquidity, stability, and affordability to the mortgage market. Both entities helped to bring 30-year mortgages with more modest down payments and universal construction standards.

These programs also helped returning soldiers finance a home after the end of World War II, and sparked a construction boom in the following decades. Also, the FHA helped borrowers during harder times such as the inflation crisis of the 1970s and the drop in energy prices in the 1980s.

By 2001, the home ownership rate had reached a record level of 68.1%.

Government involvement also helped during the 2008 financial crisis. The crisis forced a federal takeover of Fannie Mae as it lost billions amid massive defaults, though it returned to profitability by 2012.

The FHA also offered further help amid the nationwide drop in real estate prices. It stepped in, claiming a higher percentage of mortgages amid backing by the Federal Reserve. This helped to stabilize the housing market by 2013. Today, both entities continue to actively insure millions of single-family homes and other residential properties.