Yearly, you can write off the interest you pay on up to $750,000 of mortgage debt. Most homeowners don’t have mortgages large enough to hit the cap, says Evan Liddiard, CPA, director of federal tax policy for the National Association of REALTORS®. But people who live in pricey places like San Francisco and Manhattan, or homeowners anywhere with hefty mortgages, will likely maximize the mortgage interest deduction.
Note: The $750,000 cap affects loans taken out after Dec. 17, 2017. If you have an loan older than that and you itemize, you can keep deducting your mortgage interest debt up to $1 million. But if you re-fi that loan, you can only deduct the interest on the amount up to the balance on the day you refinanced – you can’t take extra cash and deduct the interest on the excess.