Typically, your monthly housing expense, including monthly payments for taxes and insurance, should not exceed about 28 percent of your gross monthly income. If you don't know what your tax and insurance expense will be, you can estimate that about 15 percent of your payment will go toward this expense. The remainder can be used for principal and interest repayment.In addition, your proposed monthly housing expense and your total monthly debt service combined cannot exceed about 36 percent of your gross monthly income. If it does, your application may exceed the lender's underwriting guidelines and your loan may not be approved.
Depending on your individual situation, there may be more or less flexibility in the 28 percent and 36 percent guidelines. For example, if you are able to buy the home while borrowing less than 80 percent of the home's value by making a large cash down payment, the qualifying ratios become less critical. Likewise, if Bill Gates or a rich uncle is willing to cosign on the loan with you, lenders will be much less focused on the guidelines discussed here.
Remember that there are hundreds of loan programs available in today's lending market and every one of them has different guidelines. So don't be discouraged if your dream home seems out of reach.
In addition, there are a number of factors within your control which affect your monthly payment. For example, you might choose to apply for an adjustable rate loan which has a lower initial payment than a fixed rate program. Likewise, a larger down payment has the effect of lowering your projected monthly payment.
