Sarah, here is the number nobody in this thread gave you: on your $350,000 loan at 6.6 percent, a $25,000 recast lowers your payment by roughly $164 a month, and a $50,000 recast lowers it by roughly $329. That is the whole recast, and it is usually smaller than people expect. Thirteen people have already defined the term well, so I will skip the definition and run your actual arithmetic, because the definition is not your decision. The fork in the road is. Your payment on $350,000 at 6.6 percent over 30 years is about $2,235 a month in principal and interest. If you took the loan in early 2024, you are roughly two and a half years in, your balance is somewhere around $339,900, and you have about 330 payments left. Now the two roads. Road one, recast. You send $25,000, your servicer re-amortizes the remaining balance over the remaining 330 months, and your payment drops to about $2,071. Your rate stays 6.6 percent. Your payoff date does not move. Not by one day. Road two, prepay without recasting. You send that same $25,000 as a principal-only payment and you keep paying $2,235. Your payment does not drop, but the loan now pays off in about 272 months instead of 330. You just erased close to five years of payments and roughly $75,000 of interest that the recast route leaves on the table. Double the money and the gap doubles. A $50,000 recast takes you to about $1,907 a month. That same $50,000 applied without a recast retires the loan in about 228 months instead of 330, saving somewhere near $120,000 in interest compared with recasting. So the rule is simple. Recast if what you need is monthly breathing room, a smaller nut to cover if income gets bumpy. Prepay without recasting if what you want is to be done sooner and keep the most money. Same check, opposite outcomes. On your "how often" question: most servicers allow it but cap it, commonly once every twelve months, and many limit you to one or two over the life of the loan. Expect a minimum lump sum, usually in the $5,000 to $10,000 range, and a flat fee, usually a few hundred dollars rather than a percentage. Confirm loan type first, because recasting is generally a conventional feature and FHA, VA and USDA loans typically are not eligible. One thing that did not exist when you asked this. It is August 2026 now, and I checked before writing. Freddie Mac has the 30-year fixed averaging 6.69 percent and the 15-year at 6.01 percent. That means a straight 30-year refinance would do nothing for you, since you would be trading 6.6 for something higher. If your goal is interest savings and you can carry the payment, a 15-year near 6.01 percent is the only refinance worth pricing, and even then compare it honestly against simply prepaying the loan you already have, which costs you no closing costs at all. One caveat on my numbers: I assumed a 30-year term starting in early 2024 and principal and interest only, no escrow. Ask your servicer for your exact balance and a recast quote and the shape of the answer will hold even if the digits shift. I am a real estate professional in Los Angeles and the South Bay, so Venice, Florida is not my backyard. I am glad to introduce you to a strong agent and a lender there through my network if you want a second read. My name is Zoltan Peresztegi and I am happy to help either way. Zoltan


