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Is the mortgage interest and real property tax I pay on a second residence deductible?
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Yes and maybe.

Mortgage interest paid on a second residence used personally is deductible as long as the mortgage satisfies the same requirements for deductible interest as on a primary residence.

If the home was acquired on or before December 15, 2017, then the total amount you (or your spouse if married filing a joint return) can treat as home acquisition debt on your main and second home is $1,000,000; or $500,000 if married filing separately. If the home was acquired after December 15, 2017, the home acquisition debt limit is $750,000; or $375,000 if married filing separately.

State and local real property taxes are generally deductible.

  • Deductible real property taxes include any state or local taxes based on the value of the real property and levied for the general public welfare.
  • Deductible real property taxes don't include taxes charged for local benefits and improvements that directly increase the value of the real property, such as assessments for sidewalks, water mains, sewer lines, parking lots, and similar improvements.
  • Also, an itemized charge for services to specific property or people isn't a real property tax, even if the charge is paid to the taxing authority. You can't deduct the charge as a real property tax when it's a unit fee for the delivery of a service (such as a $5 fee charged for every 1,000 gallons of water you use), a periodic charge for a residential service (such as a $20 per month or $240 annual fee charged for trash collection), or a flat fee charged for a single service provided by your local government (such as a $30 charge for mowing your lawn because it had grown higher than permitted under a local ordinance).
  • The total deduction allowed for all state and local taxes (for example, real property taxes, personal property taxes, and income taxes or sales taxes) is limited to $10,000; or $5,000 if married filing separately.

Renting out your second residence - If you do rent out your second residence, and you use it personally, additional rules may impact the deductibility of mortgage interest and real property taxes. Please see the publications listed below for additional information.