The formula for calculating monthly mortgage insurance premium became effective May 1, 1998 (see Mortgagee Letter 98-22 Attachment).. Below is the monthly mortgage insurance premium (MIP) calculation with examples and pseudocode using the annual and upfront MIP rates in effect for mortgages assigned an FHA case number before October 4, 2010. There will be the following reduction in premiums in Annual Mortgage Insurance Premiums for all case numbers assigned on or after January 26th, 2015 for the following: On terms > 15 years and loan amounts ≤ $625,500 - If the loan to value is ≤ 95%, Of that amount, the refund owed to you is $1,500 If the FHA PMI Upfront fees on the new loan are $2,000 Then you pay $500 on the new FHA PMI Upfront Mortgage Insurance Premium, because $1,500 of it credited to you with your refund. If you took out your FHA Mortgage Loan MORE than 3 years ago,