The following calculation assumes a 28 percent income tax bracket. If your bracket is higher, your savings will be, too. Based on your current rent, use this calculation to figure out how much mortgage you can afford.
Multiplier: x 1.32
Mortgage payment: _________________________
Because of tax deductions, you can make a mortgage payment — including taxes and insurance — that is approximately one-third larger than your current rent payment and end up with the same amount of income.
For more help, use Fannie Mae’s online mortgage calculators.