If you can't afford the increased payment that comes with a 15-year loan, if the increased payment disqualifies you based on DTI ratio requirements or if you want to finance a more expensive home, then a 30-year mortgage might be the best thing for you. You should certainly consider all your options, including other types of mortgages, to determine whether a 30-year loan is the best fit for you. Statistically speaking, it likely will be.