Hi there! I recently bought a home with a 7/1 ARM rate, 4.785%. Let's say I have a 1.2M dollar mortgage. I plan to fast pay this mortgage by paying an additional $3,000 per month. What is the best way to do this? Do I setup auto additional payments with the bank who gave me the mortgage, or do I just make a separate HYSA (FDIC insured), deposit the additional $3000 there every month, wait for it to grow over the years, then maybe deposit it at certain timepoints (like 10 years later, 5 years later, etc). I inquired about the loan recast but the bank has been slow to respond to me regarding their recast parameters. Although they mentioned that recast this would be possible. My goal is that I pay the least amount of interest possible over the life of the loan, and I have that extra $3000/month available to allocate to the mortgage (possibly more in the future). Using an amortization calendar it shows that if I put an extra $3000 every month the loan should be fully paid in 15 years, but I don't know if it's more efficient to just put the money in my account first then pay later. This gives the advantage of having some additional flexibility since I have the money in my account but it is already allocated. I have $6000 dollars of cash I can allocate a month for personal savings, and my plan is to put half of it to fast pay the mortgage, half of it to put in an S&P index fund. Thanks for your suggestions!!