Mortgage Interest Deduction Calculator

Estimate how much mortgage interest may actually reduce federal taxable income.

Filing status

Average acquisition debt

Mortgage interest rate

Property and state taxes

Other itemized deductions

Marginal tax rate

Estimated federal tax savings

$3,798

Savings above standard deduction

Deductible mortgage interest

$34,125

Debt limit $750,000

Annual interest estimate

$34,125

Allowed SALT/property taxes

$8,200

Total itemized estimate

$45,825

Standard deduction comparison

$30,000

Assumes post-2017 acquisition debt limit of $750,000 ($375,000 MFS), simple average balance interest, and no special home-equity restrictions.