There are several reasons why you might want to refinance a mortgage. One common reason is to get a lower interest rate, which can save you money on interest payments over the life of the loan. Refinancing can also help you reduce your monthly payments or shorten the loan term, allowing you to pay off your mortgage faster. Additionally, refinancing can help you convert an adjustable-rate mortgage (ARM) to a fixed-rate mortgage, giving you more predictability and stability in your monthly payments. Finally, if you have built up equity in your home, you may be able to use a cash-out refinance to borrow against that equity and use the funds for home improvements or other expenses.