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Step 1
Familiarize yourself with terms common to an interest-only mortgage:
- Mortgage amount is the original balance of your loan.
- Loan term is the number of years or months from the beginning to the end of the loan.
- Interest-only period is the period that no portion of the payments are applied to the principal.
- Interest rate is the percentage of the mortgage balance you pay to use the bank’s money.
- Your monthly payment is the amount due each month. Later in a loan term, it will include interest and principal.
- Total payments is the number of payments that will be required over the life of the loan.
- Final payment amount is the anticipated balance of principal upon maturity of the loan.
- Total interest is the total amount of money you’ll be paying in interest over the life of the loan.
- Prepayment refers to additional payments made during the life of the loan. Prepayments are applied directly to principal, reducing the interest over the life of the loan. You may make prepayments monthly, yearly or as a one-time payment.
- Savings is the amount you’ll save over the life of the loan by making prepayments. -
Step 2
Visit lender Web sites to use their free interest-only mortgage calculator.
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Step 3
Input the loan amount, loan term, interest-only period and interest rate you have been quoted.
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Step 4
Enter any foreseeable prepayments you will make.
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Step 5
Click "Calculate" and then click "View Report."
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Step 6
Print the report or save it in an Excel spreadsheet:
- With the report on screen, hold down CTRL and press A.
- Then hold down CTRL and press C.
- Open an Excel spreadsheet by clicking "Start," then "Programs," then "Microsoft Excel."
- Hold down CTRL and press V. -
Step 7
Repeat with other loan offers, printing or saving to a new Excel worksheet.
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Step 8
Look at the following data points for comparison:
- Ending principal balance—will you have to make a large payment at the end of your loan? Do you intend to keep this loan until it has matured? Will this balloon payment cause a hardship?
- Interest savings for prepayment—will you be able to make prepayments?
- Total interest paid—this is the actual cost to you.









Comments
himetri said
on 4/2/2008 Useful! See also http://hy-homemortgage.blogspot.com