The benefits of getting a pre-approved mortgage are many. First of all, pre-approval gives you an idea of what you can afford, making your search for a new home much simpler. It also does away with the tension of trying to find out what your monthly installments are going to be. Probably the greatest advantage of getting a pre-approved loan is that it allows you to lock in a rate. As the lender guarantees a fixed rate when pre-approving the mortgage, the borrower can secure that same rate even when the market prices climb up. In case a situation arises where the interest rates fall below those that were pre-approved, the lenders usually offer the lower rate.