Assume your home is assessed at $200,000. You have a $150,000 loan for 30 years at 6 percent. Your property tax rate is 1.5 percent of the assessed value. In year one, you would pay $9,000 in mortgage interest and $3,000 in property tax (1.5 percent on $200,000 assessed value).

Assuming you are in a 28 percent tax bracket, by what amount would you have lowered your federal income tax?