Some lenders require that you roll them together. Of course, they then get to use your money for a while. Here's my personal opinion: If you are fiscally responsible and have the choice, do it yourself. If it's hard for you to save and budget, have them do it for you. Be aware that they may adjust your total payment each year, based on changes in insurance costs and/or taxes. You can minimize that impact by monitoring and making additional payments to your escrow fund if needed.