Recast or refinance? What to do with a windfall against your mortgage

What a recast actually does

A fixed-rate mortgage payment is calculated from three inputs: balance, rate, and remaining term. A recast (also called re-amortization) recomputes the payment after a substantial principal reduction, holding the rate and the maturity date fixed. Pay $50,000 against the balance, and instead of keeping the old payment and finishing years early, the recast spreads the smaller balance over the original remaining term — producing a permanently lower required payment.

Nothing else about the loan changes. Same note, same rate, same payoff date, same servicer. That is the recast's entire appeal: it delivers payment relief without surrendering a rate you may never see again, and without a new origination process. Servicers typically charge a processing fee for the recalculation and require a minimum principal reduction; both are servicer policies, so ask yours for its current terms.

What a recast doesn't do

A recast will not lower your rate, shorten your term, remove mortgage insurance by itself, take a borrower off the loan, or produce cash. It is a payment recalculation, nothing more. If your existing rate is worse than what the market now offers, a recast locks in relief on a loan you might be better off replacing.

Also worth knowing: you can make the same lump-sum payment and skip the recast. As the CFPB's explainer on paying down a mortgage describes, extra principal reduces the balance and shifts each subsequent payment's split toward principal — the required payment stays the same, but the loan finishes early and total interest falls. Recast lowers the payment and keeps the date; plain prepayment keeps the payment and pulls in the date. Same money, opposite goals.

• Recast: lower required payment, same rate, same payoff date
• Prepay without recast: same required payment, earlier payoff, less total interest
• Refinance: everything repriced — rate, term, and costs

Availability: your servicer and investor decide

There is no federal right to a recast. Whether your loan can be recast is a matter of the note, the investor's servicing rules, and the servicer's own program. Conventional loans held or securitized by the agencies are commonly recast-eligible under their servicing frameworks; government-backed loans — FHA and VA — generally are not recast in the conventional sense, and adjustable-rate loans re-amortize on their own schedule anyway.

The only reliable answer comes from asking your servicer directly: is this loan eligible, what minimum principal reduction applies, what is the fee, and how long does processing take. Get the terms in writing before sending the lump sum, and say explicitly that the payment is intended as a principal curtailment pending recast — not as prepaid installments.

The cost comparison is lopsided — and that's the point

A recast costs a processing fee. A refinance costs the full origination stack — lender charges, appraisal, title, recording, and in Florida documentary stamp and intangible taxes on a brand-new mortgage — which Freddie Mac's consumer guidance on refinancing costs describes as commonly running a meaningful percentage of the loan amount. On cost alone, recast wins by a mile.

But cost alone is the wrong frame, because the refinance buys something the recast cannot: a different rate and term. If market rates sit meaningfully under your note rate, the refinance's interest savings can dwarf the fee difference. If your note rate beats the market, the recast preserves it — and the comparison is over before it starts. The deciding input is the spread between your rate and today's quotes, which is a number to obtain fresh, not assume.

How to decide, in order

First, define the goal: lower required payment, earlier payoff, or lower lifetime interest — the three paths serve different masters. Second, get your servicer's recast terms and a current refinance quote for your scenario, then run the refinance through a break-even calculation with the recast as the baseline instead of doing nothing. Third, check the second-order effects: a lower required payment also helps debt-to-income math on future borrowing, while an early payoff builds equity faster.

Wholesale Mortgage Lending arranges refinances through wholesale lenders and has no role in recasts — that conversation belongs to you and your servicer, which is exactly why we will tell you when the recast is the better answer. A brokerage that only ever recommends the transaction it gets paid on is not doing analysis. Education first; the math decides.