Most homeowners looking to lower their mortgage payment think first of refinancing. But there's a lesser-known option that can achieve a similar result without a new loan, new closing costs, or a new interest rate: mortgage recasting. If you come into a lump sum of money and want to reduce your monthly payment while keeping your existing loan and rate, recasting is worth understanding.
What Mortgage Recasting Is
Recasting, sometimes called "re-amortization," involves making a large lump-sum payment toward your mortgage principal and then asking your lender to recalculate — or re-amortize — your remaining monthly payments based on the new, lower balance, while keeping your original interest rate and loan term. Unlike a refinance, recasting doesn't create a new loan: your existing mortgage stays in place, but the math behind your monthly payment is reset.
How Recasting Differs From Refinancing
| Feature | Recasting | Refinancing |
|---|---|---|
| New loan created | No | Yes |
| Interest rate | Stays the same | Can change (up or down) |
| Loan term | Stays the same | Can be changed |
| Credit check required | Usually not | Yes |
| New appraisal required | Usually not | Usually yes |
| Closing costs | Typically a small flat fee | Full closing costs apply |
| Underwriting process | Minimal | Full underwriting review |
Because recasting doesn't involve a new loan, it skips most of the process associated with a rate-and-term refinance — there's typically no new credit pull, no new appraisal, and no lengthy underwriting review. This makes it faster and cheaper to execute, though it also means recasting can't help you get a lower interest rate, since your original rate carries forward unchanged.
How the Math Works
When you recast, your lender takes your new, lower principal balance and re-amortizes it over your original loan's remaining term at your existing interest rate. Because the balance is smaller but the timeline hasn't changed, your monthly principal and interest payment drops. For example, someone several years into a 30-year mortgage who makes a large lump-sum payment could see their monthly payment fall meaningfully, even though the interest rate and remaining number of years on the loan stay exactly the same.
Typical Requirements to Recast
Recasting isn't available on every loan, and requirements vary by lender and loan type. Common conditions include:
- A minimum lump-sum payment, often a set dollar amount or a minimum percentage of the remaining balance, which varies by lender
- The loan must be current, with no missed or late payments
- A processing fee, usually modest compared to refinance closing costs — often just a few hundred dollars
- Loan type restrictions — recasting is generally more available on conventional loans and is often not offered on FHA, VA, or USDA loans, since those government-backed programs have their own servicing rules; confirming availability directly with your servicer, or with HUD, the VA, or USDA for those specific loan types, is recommended
- Jumbo loans may or may not offer recasting depending on the lender — see jumbo loans for high-value homes for general context on how these loans differ from conforming loans
When Recasting Might Make Sense
Recasting tends to appeal to homeowners who:
- Receive a windfall — an inheritance, bonus, or proceeds from selling another asset — and want to reduce their monthly obligation without giving up a low existing interest rate
- Want to avoid the time, paperwork, and closing costs associated with a full refinance
- Don't need to change their loan term or switch loan types
- Already have a rate that's lower than current market refinance rates, making refinancing unattractive by comparison
When a Different Option Might Make More Sense
If your goal is to shorten your loan term, switch from an adjustable-rate to a fixed-rate loan, or you'd actually benefit from a lower interest rate than you currently have, refinancing may accomplish more than recasting, despite the added cost and process. See when to refinance your mortgage for a broader comparison of scenarios. Alternatively, if you'd rather keep your funds liquid and available rather than locking them into your home's equity, simply making extra principal payments over time — without a formal recast — is another way to reduce total interest paid, though it won't lower your required monthly payment the way a recast does.
Comparing the Numbers
Because recasting reduces your payment without changing your rate, it's worth using a mortgage payment calculator or an amortization schedule calculator to see exactly how a specific lump-sum payment would affect your remaining schedule. Comparing that outcome against a refinance scenario, factoring in refinancing closing costs and a refinance break-even calculator, can help clarify which approach better matches your financial goals. Since not all lenders offer recasting and terms vary, contacting your loan servicer directly to confirm availability and specific requirements is the best first step.