A mortgage recast, sometimes called re-amortization, is when your lender recalculates your monthly payment after you pay down a large chunk of principal. Your interest rate and payoff date stay the same; only the payment drops. On a loan with $300,000 left, 25 years remaining and a 6.5% rate, the payment is about $2,025.62 a month. Pay $50,000 toward principal and recast, and the payment on the remaining $250,000 falls to about $1,688.02, a saving of $337.60 a month.
A mortgage recast is not a legal right. It is a feature some lenders and servicers offer, usually for a fee and only on certain loans. Here is how it works and when it makes sense.
How does a mortgage recast work?
You make a lump-sum principal payment, often from a home sale, inheritance or bonus. The servicer then re-runs the standard amortization formula using the new, lower balance, the same rate and the same number of months remaining. Because the balance is lower, the payment needed to pay it off on schedule is lower.
Compare that with simply prepaying without a recast. If you send $50,000 extra and do not recast, your required payment stays at $2,025.62, but the loan pays off years early because more of each payment goes to principal. Both options save interest; they differ in whether you want a lower bill now or an earlier payoff date.
What does a recast example look like step by step?
Using the standard payment formula, monthly rate 6.5% ÷ 12 and 300 months remaining:
- Balance before: $300,000; payment $2,025.62
- Lump sum: $50,000
- Balance after: $250,000; payment $1,688.02
- Monthly saving: $337.60
- Payments over the remaining 300 months fall by about $101,281 in total. Subtract the $50,000 you put in, and you save roughly $51,281 in interest.
You can check these figures or try your own with the mortgage recast calculator, and see the new payment schedule month by month in the amortization calculator.
Mortgage recast vs. refinance: which is better?
A refinance replaces your loan with a new one. It can change the rate and the term, but it involves an application, credit check, appraisal and closing costs. A mortgage recast keeps your existing loan and rate and usually costs far less to arrange.
- If current rates are higher than your rate, a recast keeps your low rate while still lowering the payment.
- If rates have dropped meaningfully, a refinance may save more, even after closing costs. Run the comparison in the refinance calculator.
- If you cannot qualify for a new loan, perhaps because income changed, a recast does not need new underwriting in the same way.
Which loans qualify for a mortgage recast?
Policies vary by servicer, so call yours and ask. Many conventional loans are eligible. Government-backed loans, such as FHA and VA loans, are commonly not eligible for recasting. Servicers that offer it typically set a minimum lump sum and charge an administrative fee; ask for both in writing, along with how long processing takes.
Your loan also needs to be current. A mortgage recast is a tool for borrowers in good standing, not a hardship program. If you are struggling to make payments, ask your servicer about loss mitigation options instead, and see the CFPB’s guidance on help for homeowners.
Is a mortgage recast a good use of your cash?
Ask three questions before you commit a lump sum:
- Do you have an emergency fund? Money paid into the house is hard to get back without selling or borrowing.
- Do you have higher-rate debt? Paying off a credit card at 22% beats saving 6.5% on a mortgage.
- Could the money earn more elsewhere? Compare the guaranteed 6.5% “return” from paying down the loan with what you might expect from investing, after tax and risk.
If those check out, a recast can be a clean way to improve monthly cash flow, for example after buying a new home before selling the old one, when sale proceeds arrive and you want the payment on the new loan to reflect the bigger down payment.
Does a mortgage recast affect taxes or escrow?
A recast reduces the interest you pay each year, so if you itemize and deduct mortgage interest, your deduction will shrink. Your escrow portion for property taxes and insurance does not change because of a recast; it is set by your tax bill and premiums. Watch your next escrow analysis for any separate change.
How do you request a mortgage recast?
- Call your servicer and confirm eligibility, the minimum lump sum and the fee.
- Send the principal payment, clearly labeled for principal reduction.
- Submit the recast request form and fee.
- Confirm the new payment amount and the date it starts, and update any automatic payments.
Keep copies of everything until you see the new payment on your statement.
When does a mortgage recast make the most sense?
The classic case is a buyer who purchases a new home before selling the old one. They take a larger loan at first, then use the sale proceeds to pay it down and recast so the payment matches what it would have been with a bigger down payment. Another is a borrower who receives a windfall but wants flexibility: lowering the required payment frees up monthly cash while still cutting interest. If your goal is simply to be debt-free sooner, extra principal payments without a recast do that better, and you can model that path with the mortgage payoff calculator.
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FAQ
What does “What Is a Mortgage Recast and How Does It Lower Payments?” explain?
A mortgage recast, sometimes called re-amortization, is when your lender recalculates your monthly payment after you pay down a large chunk of principal. Your interest rate and payoff date stay the same; only the paymen…
How should I use this guide with a calculator?
Read the definitions and assumptions first, then open the linked calculator with the same inputs. Treat results as estimates, not professional advice.
Is this financial or medical advice?
No. Calcenzo content is educational. Confirm important decisions with a qualified professional and official sources for your situation.