Mortgage Interest Differential Payment (MIDP) Calculators

Welcome to the MIDP Calculator page. The overall goal when calculating a mortgage interest differential payment (MIDP) is to compensate for increased mortgage interest cost needed to purchase a comparable replacement dwelling. The following tools have been developed to assist practitioners in computing the MIDP in accordance with 49 CFR 24.401(d) and Appendix A for §24.401(d).

Please choose a method.

• Traditional Buy Down Method
  • HTML
  • Excel (38KB)
• Interest Only, Plus Points
  • HTML, Comparable
  • HTML, Actual
  • Excel (56KB)
• Acquired Property Subject to an Adjustable Rate Mortgage (ARM)
  • HTML, Comparable
  • HTML, Actual
  • Excel (57KB)

A viewer is availible from Microsoft® for Excel files.