Mortgage Interest and SALT Deductions for New York City Home Buyers
The tax benefit depends on whether the home is a residence or rental property, the size and use of the mortgage, and whether the owner itemizes deductions. Income can also reduce the allowable state and local tax deduction.
When Is Mortgage Interest Deductible?
Interest on a mortgage used to buy, build, or substantially improve a main or second home may be deductible if the loan is secured by the home and the owner itemizes deductions. For qualifying mortgages taken out after December 15, 2017, interest is generally deductible on up to $750,000 of mortgage debt across the two homes combined for a single taxpayer or a married couple filing jointly, or $375,000 for a married taxpayer filing separately.
Paying mortgage interest does not guarantee a tax saving. If the owner’s total itemized deductions do not exceed the standard deduction, taking the standard deduction may be more beneficial.
How Does the SALT Deduction Apply to NYC Homeowners?
For the 2026 tax year, the combined SALT deduction is limited to $40,400 ($20,200 if married filing separately). That limit begins to decrease when modified adjusted gross income exceeds $505,000 ($252,500 if married filing separately), but it cannot fall below $10,000 ($5,000 if married filing separately). Under current law, both the higher deduction limit and the income threshold increase by 1% for each tax year from 2027 through 2029. For tax year 2030 and later, the deduction limit is scheduled to return to $10,000 ($5,000 if married filing separately.
Does It Matter Whether You Buy a Condo or Co-op?
A condo owner generally pays real estate taxes directly. In a co-op, the corporation pays the building’s real estate taxes, and a qualifying shareholder may deduct the share allocated to the apartment. The co-op typically provides an annual statement showing that amount. In either case, the homeowner’s personal deduction remains subject to the SALT limit.
What If the Property Is a Rental?
For a property used entirely as a rental, qualifying mortgage interest and real estate taxes are generally deductible in full as rental expenses. If those expenses contribute to a net rental loss, separate rules may limit when the owner can use that loss to offset other income.
What Should Buyers Check Before Relying on a Deduction?
A deduction does not reduce a buyer’s tax bill dollar for dollar. Before counting on a tax benefit, buyers should consider how they will use the property, the amount and purpose of the mortgage, whether they will itemize deductions, and how the SALT limit applies to their income. A tax adviser can estimate the benefit based on the buyer’s circumstances.