The Lender must rescore a mortgage when any data element of the mortgage change and/or new Borrower information becomes available. The Lender is NOT required to rescore a mortgage if the following data elements change from the last scoring event within the described tolerance levels:
• Cash Reserves – verified cash reserves are not less than 10% below the previously scored amount
• Income – verified income is not less than 5% below the previously scored amount
• Tax and Insurance Escrow – the cumulative monthly tax and insurance escrow does not result in more than a 2% increase in the total payment to effective income ratio (PTI).
For additional information see Handbook 4000.1 II.A.4.a.vii. available at https://www.hud.gov/program_offices/administration/hudclips/handbooks/hsgh