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● Lower payments after a lump-sum payment

Mortgage Recast Calculator

Estimate your new monthly principal-and-interest payment after applying a lump sum while keeping the same interest rate and remaining loan term.

⌂ ↓
STEP 01Enter your mortgage

Add the remaining balance, interest rate and months left.

STEP 02Add a lump sum

Enter the principal payment you plan to make before recasting.

STEP 03Review the savings

Compare your current and estimated recast payments and interest.

Current balance
$300,000
remaining principal
Lump-sum payment
$50,000
principal reduction
New balance
$250,000
balance after payment
New monthly payment
$1,582.53
principal and interest
Monthly savings
$316.51
estimated reduction
Mortgage details
$
%
years
months
$
$
Estimated recast payment
$1,582.53
monthly principal and interest
Your estimated principal-and-interest payment could decrease by $316.51 per month.
New paymentMonthly savings
Payment comparison
Current monthly payment$1,899.04
Estimated recast payment$1,582.53
Monthly savings$316.51
Annual payment savings$3,798.12
Remaining payments300
Recast fee$250
Interest comparison
Interest without recast$269,711.81
Interest after recast$224,759.84
Gross interest savings$44,951.97
Net savings after fee$44,701.97
Fee break-even period1 month
Payment reduction16.67%
Recast insights
83.3%balance retained
300months remaining
$317monthly savings
The lump sum reduces your remaining principal by 16.67%.
What stays the same
Interest rateUnchanged
Loan maturity dateUnchanged
Loan typeUnchanged
Principal balanceReduced
Monthly P&I paymentRecalculated
Calculation assumptions

This calculator assumes a fixed-rate, fully amortizing mortgage. A recast applies your lump-sum payment directly to principal and recalculates the payment over the existing remaining term. Property taxes, homeowners insurance, HOA dues, mortgage insurance and escrow changes are not included.

Frequently asked questions
What is a mortgage recast?

A mortgage recast recalculates your monthly principal-and-interest payment after a substantial principal reduction while keeping the existing rate and maturity date.

Does a recast change my interest rate?

No. A standard recast keeps the original interest rate and adjusts the payment based on the lower remaining balance.

Is every mortgage eligible for recasting?

No. Eligibility, minimum lump-sum requirements, fees and timing rules depend on the lender and loan program.

Finance & Calculation Disclaimer

Results are estimates generated locally in your browser using standard financial formulas and the figures you enter. They are for informational purposes only and are not financial, credit, tax or legal advice. Actual offers, rates, fees and eligibility vary by provider. VisionVix accepts no liability for decisions based on this tool's output.

ⓘ Mortgage Recast Calculator Disclaimer
This calculator is for educational and planning purposes only. It does not provide lending, legal, tax or financial advice. Actual recast eligibility, fees, payment amounts and lender requirements may differ. Contact your mortgage servicer for an official recast quote.
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