$1250-$250= $1000 or $1667-$250= $1417
In this example, you´d be able to spend between $1000 and $1417 a month on your principal and interest payments, real estate taxes, and insurance. If real estate taxes are $100/month and insurance is another $50/month, that will leave you between $850 and $1267 to spend on a mortgage.
Here´s how to calculate the amount of the mortgage you can afford to carry: Multiply the net amount you can spend ($850 to $1267) by twelve (for an annual mortgage amount), then divide that number by the current prevailing interest rate (say, 8 percent for a 30-year fixed-rate loan).
25% of gross income: $850 x 12 = $10,200 ÷.08 = $127,500
33% of gross income: $1267 x 12 = $15,204 ÷ .08 = $190,050
So how much house can you afford? Assume you add a 20% down payment to each of these mortgage amounts (divide $127,500 or $190,050 by 5 and add that number to the total).
$127,500 ÷ $25,500 = $153,000
$190,050 ÷ 38,010 = $228,060
According to these calculations, on a $60,000/year income, assuming you have 20% to put down in cash, you´d be able to afford a home that costs between $153,00 and $228,060.