Reg. B requires you to advise the applicant within 30 days after receipt of a "completed application" as to whether the application has been approved, denied, or if the bank has a counteroffer. As long as you have notified the customer of the approval of their application or provided an adverse action notice for a denial within 30 days of receiving a completed application, you have complied with Reg. B. Your own bank policy or procedures may dictate what your bank considers to be a completed application. We have many mortgage loans where the time between when the application was received and approved and when the loan actually closed is several months. With low mortgage rates and many people refinancing, it is difficult to get a loan closed within 30 days or less of approval. You do need to be within 30 days on your denials, though.