The fixed-rate mortgage is the most popular mortgage program in use today. Fixed-rate loans offer the borrow a fixed interest rate for the life of the loan, typically 15 to 30 years. Borrowers have peace of mind knowing that their monthly payment will not change over time. Conventional fixed-rate mortgages have underwriting requirements established by Freddie Mac and Fannie Mae, and require certain down-payment and debt-to-equity ratios to qualify. Fixed-rate loans are especially attractive to buyers who plan to stay in their home for more than a few years.