What are the maximum basis points added to the average prime offer rate (APOR) that...

A loan is a Qualified Mortgage (QM) with “safe harbor” legal protection if its APR does not exceed the average prime offer rate (APOR) by more than 100 basis points (1%) for a first-lien transaction.

“A covered transaction is a safe harbor QM if the APR does not exceed the APOR for a comparable transaction by 1.5 or more percentage points for first-lien transactions, or 3.5 percentage points for subordinate-lien transactions. For purposes of safe harbor protection, the threshold is 1 percentage point (100 basis points) above APOR.”

— 12 CFR § 1026.43(e); CFPB QM/ATR Rule Summary