Deductible Home Mortgage Interest Calculator

Show expandable text

Warning

Product support for ToolBox CS ended on October 31, 2022.

Help & How-To Center content for ToolBox CS may be outdated and is used at your own risk.

This calculator computes your client's qualified mortgage loan limit and the deductible home mortgage interest.

Example

Your clients want to buy a house with a mortgage of $1,200,000. They want to know the qualified loan limit and how much of the interest paid is deductible home mortgage interest.

Field Input
Average balance of all home acquisition debt $1,200,000
Acquisition debt limit (enter $1,000,000 or $500,000 MFS) $1,000,000
Fair market value minus acquisition and grandfathered debt $10,000
Total interest paid $50,000

In this example, $1,010,000 is the qualified loan limit and $42,083.33 is deductible home mortgage interest.

Notes

  • The amount in the Fair market value minus acquisition and grandfathered debt field is as of the date the last debt was secured.
  • The format of this calculator follows a worksheet from IRS Publication 936.

Was this article helpful?

Thank you for the feedback!