Mortgage Recast Calculator

Trust & transparency

Educational estimates only

Before you act on any number here, read this.

No financial advice

The content on this site, including the calculator, the guide and every worked example, is provided for educational purposes only. It is not financial, tax, or legal advice, and it is not a recommendation to recast, refinance, invest, or do anything with your money.

Estimates, not guarantees

The calculator uses standard amortization math, but your servicer's actual result may differ by a few cents or a few dollars due to rounding, day-count conventions, or internal amortization methods. Recasting eligibility, fees, minimum lump sums, seasoning requirements and processing times vary by servicer and can change without notice. Figures for interest saved assume no additional principal payments beyond the lump sum.

Confirm with your servicer

Before making a lump-sum payment, contact your loan servicer directly to confirm that your loan is eligible, what the minimum lump sum is, what the fee is, and how long the process takes. Sending a lump sum without first requesting and confirming a recast is one of the most common and avoidable mistakes borrowers make.

Not affiliated

This site is not affiliated with Fannie Mae, Freddie Mac, the CFPB, any lender, or any government agency. The tax discussion on the site is educational only; consult a licensed tax professional about your specific situation.

Keep going

Related calculators