Essential knowledge
Understand this key aspect of home buying and mortgages.
Mortgage recasting is a low-cost way to lower your monthly payment by applying a lump-sum principal payment and asking your lender to recalculate payments. Use our recast calculator or the mortgage calculator to estimate savings and compare recast vs refinance for your 2026 scenario.
This guide explains what a mortgage recast is, the pros and cons in 2026 market conditions, eligibility rules, typical fees, and step-by-step examples showing when recasting beats refinancing.
A mortgage recast (also called loan recasting) lets you apply a principal payment to reduce your outstanding balance, after which the lender recalculates monthly payments based on the remaining term and interest rate. Recasting does not change your interest rate or loan term — it only reduces payments by lowering the principal.
Imagine you have a $300,000 mortgage with 25 years left at 5.5% and a $1,900 monthly payment. You make a $50,000 lump-sum principal payment and request a recast. The lender recalculates your monthly payment using the new balance ($250,000), the same interest rate, and the remaining term — your payment might drop to about $1,600.
Compare recast and refinance along three dimensions: cost, interest rate change, and long-term savings.
Use our recast calculator and refinance calculator to model both options for your loan.
Most conventional loans allow recasting. Common requirements include:
Contact your servicer to confirm eligibility and precise fee schedules. If your loan is FHA, VA, or USDA, recasting may not be available — check with your servicer or consider refinance options.
Below are illustrative scenarios; use the recast calculator for exact numbers based on your loan.
| Scenario | Original Balance | Lump Sum | Old Payment | New Payment | Fee |
|---|---|---|---|---|---|
| $400k loan @5.5%, 20 yrs left | $320,000 | $40,000 | $2,300 | $2,060 | $300 |
| $300k loan @6.2%, 25 yrs left | $250,000 | $50,000 | $1,660 | $1,390 | $350 |
Recasting does not change deductible interest rules. Larger principal payments reduce interest but may also reduce mortgage interest tax deductions. Speak with your tax advisor if you rely heavily on mortgage interest deductions.
No — recasting keeps the remaining term and lowers the monthly payment unless you choose to increase payments after recast to shorten the term.
Yes, if your lender allows, but each recast may incur a fee. Plan lump sums strategically to minimize repeated fees.
ARMs can sometimes be recast, but the payment will still adjust when the ARM resets. Recasting may lower payments until the next reset.
Use a recast when you have a meaningful lump sum, want lower monthly payments with minimal costs, and your current rate is favorable. If your goal is to reduce interest paid over the life of the loan or to shorten the term, compare with a refinance first.
Start by running numbers in our recast calculator and then call your servicer to confirm eligibility and fees.