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Mortgage Prepayment Penalty Calculator

Guide

Mortgage Prepayment Penalty Guide

Lenders calculate prepayment penalties when extra principal exceeds annual contract allowances.

Formula

Penalty = Max(0, Prepayment - Balance * Allowance %) * (Rate / 12 * 6)

Frequently Asked Questions

What is the six month interest rule?
Lenders charge 180 days of interest on principal prepayments exceeding 20 percent of the loan balance.
Do standard conforming mortgages have penalties?
Under federal rules, conventional qualified residential mortgages prohibited prepayment penalties after 2014.