Schedule A planning
Mortgage interest deduction limit
Deductible estimate
$45,811
Debt limit breakdown
Post-2017 cap$750,000
Pre-2017 cap$1,000,000
Total average debt$925,000
Post-December 15, 2017 acquisition debt is checked against the $750,000 limit for this filing status. Pre-December 16, 2017 acquisition debt is counted first up to the grandfathered limit.
Use and ownership
Interest after debt limit$45,811
After personal-use percentage$45,811
After ownership share$45,811
The estimate applies personal-use and ownership percentages after the debt-limit ratio. Enter 100% when the mortgage is only for your qualified home and you deduct the full payer share.
Related finance tools
Primary sources
IRS About Publication 936IRS Publication 936, Home Mortgage Interest DeductionIRS Publication 530, Tax Information for Homeowners
This tool is a simplified planning estimate. Publication 936 has detailed worksheets for refinancing, multiple homes, mixed-use debt, points, and special timing cases.