Beginning in 2018, the standard deduction, available to all taxpayers, regardless of whether they own a home, is $24,000 for married filing jointly and $12,000 for single taxpayers.
Let's look at an example of a couple purchasing a $300,000 home with 3.5% down at 5% interest. The first year's interest would be $14,630 and property taxes are estimated at 1.5% of sales price would be $4,500.
The interest and property taxes would provide a combined total of $19,130 which is less than the $24,000 standard deduction. Unless this hypothetical couple has other itemized deductions like charitable contributions that would make the total exceed $24,000, they would benefit more from taking the standard deduction.
If the mortgage rate were at 8%, the combined total of taxes and interest would be almost $28,000 which would make itemizing the deductions more beneficial.
Tax professionals will compare available alternatives to find the one that will benefit the taxpayer most. For more information, see www.IRS.gov and consult a tax advisor.