Mortgage Recast vs. Refinance: What a $50,000 Lump Sum Does to Your Payment
October 29, 2026
If you receive a windfall, such as a bonus, an inheritance, or the proceeds of a home sale, you can put it toward your mortgage in three main ways: make a lump-sum payment and keep the same monthly payment (which shortens the term), recast the loan (which lowers the monthly payment), or refinance (which replaces the loan with a new one). A recast keeps your existing interest rate and term but re-amortizes the lower balance, so the payment drops.
Consider a $300,000, 30-year mortgage at 6.5% with a payment of $1,896.20. After five years, the balance is about $280,833. If you make a $50,000 lump-sum payment and ask the lender to recast the loan, the new balance is $230,833 over the remaining 25 years at 6.5%, and the payment falls to $1,558.60, a reduction of $337.60 a month.
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Recasting (re-amortization) is available from many lenders for a fee, commonly $150 to $500. You make a large principal payment, often with a minimum such as $5,000 to $10,000, and the servicer recalculates your payment using the lower balance, the same interest rate, and the remaining term. Your interest rate and payoff date do not change. There is no credit check or appraisal, and closing costs are minimal compared to a refinance. Not all loans qualify: government-backed loans such as FHA and VA loans generally do not allow recasting, and some servicers do not offer it.
The benefit is lower monthly payments and lower total interest, since you owe less.
| No lump sum | Lump sum, payment unchanged | Lump sum + recast | |
|---|---|---|---|
| Balance after 5 years | $280,833 | $230,833 | $230,833 |
| Monthly payment | $1,896.20 | $1,896.20 | $1,558.60 |
| Remaining term | 25 years | about 16 years 8 months | 25 years |
| Rate | 6.5% | 6.5% | 6.5% |
Recast vs. Keeping the Payment
If you make the lump-sum payment and keep paying $1,896.20, the loan is paid off in roughly 16 years and 8 months instead of 25 years, saving a large amount of interest. The recast gives lower payments, which improves monthly cash flow but saves less interest because you keep paying interest over the full 25 years. Which is better? If you need cash flow flexibility or want to reduce your payment-to-income ratio, recast. If your priority is to minimize interest and be debt-free sooner, keep the payment. You can also recast and then continue to pay the old amount, getting the benefits of both: the lower required payment as a safety net while paying extra voluntarily.
Recast vs. Refinance
Refinancing replaces the mortgage with a new loan at the current market rate. It makes sense when the available rate is much lower than your current one, but if market rates are higher than your 6.5%, a refinance would raise your rate on the entire balance. A recast is far cheaper and simpler, with a fee of a few hundred dollars compared with refinance closing costs of 2% to 5% of the loan, and it preserves a good existing rate. A refinance can change the term, remove mortgage insurance with a new appraisal, or cash out equity, which a recast cannot do.
When a Recast Makes Sense
It is appealing when you have a low interest rate you want to keep, a lump sum available, no need to change the term, and a lender that offers recasting. It is less attractive if you carry high-interest debt (paying that off is a better use of the lump sum), lack an emergency fund, or could invest the money at a higher return than the mortgage rate. Ask your servicer about minimums, fees, and processing times, and get the new payment in writing.
Frequently Asked Questions
What is a mortgage recast?
Re-amortizing your loan after a large principal payment, lowering the monthly payment while keeping your rate and term.
How much does it cost to recast a mortgage?
Typically a fee of about $150 to $500, with a minimum lump-sum payment.
Is a recast better than a refinance?
When your current rate is lower than market rates, a recast is cheaper and keeps your rate.
Does a recast shorten the loan term?
No. The term stays the same unless you keep paying the old amount.
Can I recast an FHA or VA loan?
Generally no.