Limit on loans taken out after December 15, 2017.
For qualifying debt taken out after December 15, 2017, you can only deduct home mortgage interest on up to $750,000 ($375,000 if you are married filing separately) of that debt. If you also have qualifying debt subject to the $1,000,000 limitation discussed under Limit on loans taken out on or before December 15, 2017 , earlier, the $750,000 limit for debt taken out after December 15, 2017, is reduced by the amount of your qualifying debt subject to the $1,000,000 limit. An exception exists for certain loans taken out after December 15, 2017, but before April 1, 2018. If the exception applies, your loan may be treated in the same manner as a loan taken out on or before December 15, 2017; see Pub. 936 for more information about this exception.
See Pub. 936 to figure your deduction if you have loans taken out after October 13, 1987, that exceed $750,000 ($375,000 if you are married filing separately).