<prompt> Human: I have a 130k mortgage at a low rate 3.2 and the loan is over 30 years. The loan is through a state version of an FHA loan. If I make a one time payment of 80-90,000 will my monthly payment automatically reduce?Would I have to refinance to reduce the monthly amount? If my credit is not great at the moment, will that be a problem? Assuming below average credit, how much could I reduce the monthly payment, and what is the best way to accomplish that goal?I understand that this is not the best investment use of 80-90,000. The situation is a bit more complicated than a straight up investment, so there are non-financial reasons to use the money in this manner.  <response>: If I make a one time payment of 80-90,000 will my monthly payment automatically reduce?No. Monthly payment will not be affected, it will just shorten the life of the loan. Would I have to refinance to reduce the monthly amount?Some lenders will let you recast a mortgage, which re-amortizes it back to the original due date and recomputes a new monthly payment. You should inquire about this before making the lump sum payment; sometimes they require that the recast request comes with the lump sum.I am unsure of how common this option is, especially for FHA loans or even if its available at all. 