02/13/2026
Most homeowners don’t realize this.
If you break your mortgage early, the penalty is not a rough estimate. It is calculated using a formula that often works in the bank’s favor.
There are two methods:
• 3 months interest
• Interest Rate Differential
The bank applies whichever is higher.
The part that surprises people is that the IRD method compares your rate to posted rates you never actually received. That is where the penalty jumps.
Before you refinance, sell, or renew early, it is worth seeing the real number for yourself instead of accepting the bank’s quote.
Check out any mortgage penalty calculator online.