You can deduct mortgage interest as an itemized deduction on your federal return for interest on up to $750,000 of acquisition debt. Your lender sends Form 1098, and you claim it on Schedule A.
Mortgage Interest Is an Itemized Deduction
Mortgage interest is one of the few large deductions available to homeowners, but you only benefit from it if you itemize. You claim mortgage interest on Schedule A of your federal return, and it only helps if your total itemized deductions exceed the standard deduction. For many homeowners, especially after the standard deduction was increased, that threshold is higher than they expect.
If your mortgage interest plus your other itemized deductions, like state and local taxes and charitable gifts, does not beat the standard deduction, you take the standard deduction and the mortgage interest gives you no extra tax benefit that year. That is not a reason to skip the home purchase, it just changes how you think about the tax advantage.
The Form That Tells You the Number
Your lender sends you Form 1098, Mortgage Interest Statement, each January, showing the mortgage interest you paid during the previous year. It also reports points you paid and, in some cases, mortgage insurance premiums. You use the amount on this form to fill in your Schedule A.
If you paid less than $600 in mortgage interest in a year, your lender is not required to send a 1098, but you can still deduct the interest if you have records. Keep your monthly statements or a year-end summary so you have the total even if no form arrives.
Which Loans Qualify
The deduction generally applies to interest on debt used to buy, build, or substantially improve your home, which is called acquisition debt. Interest on a home equity loan or line of credit is also deductible if the money was used to substantially improve the home, but not if you used it for other purposes like paying off credit cards or buying a car.
The deduction applies to a primary residence and a second home, and the total acquisition debt limit is $750,000 for loans taken out after 2017, or $1 million for older loans. Your home must secure the debt, which is why the deduction does not apply to an unsecured personal loan even if you used it for home improvements.
Itemizing Is a Comparison, Not a Given
To know whether the deduction helps you, compare your total itemized deductions against the standard deduction for your filing status. If itemizing comes out ahead, you claim the mortgage interest. If not, you take the standard deduction.
This is why a high mortgage payment does not automatically mean a big tax break. A couple with a $1,500 monthly mortgage payment might pay around $15,000 a year in interest, but if their other itemized deductions are small, the standard deduction may still win. Run the comparison both ways, or ask a tax professional, before assuming the deduction changes your bottom line.
Pennsylvania and the Deduction
Pennsylvania does not allow a separate mortgage interest deduction on the state return the way the federal return does. Pennsylvania has a flat personal income tax and does not itemize deductions, so you cannot deduct mortgage interest on your PA return. The benefit, where it exists, comes entirely through the federal itemized deduction.
That means your tax planning for a Pennsylvania home purchase should focus on the federal return, and you should not expect a state tax break for your mortgage. A tax professional familiar with Pennsylvania can show you how the federal deduction interacts with your overall picture.
Smarty's Advice
Buy a home because it is the right move for your life and finances, not because of a tax deduction. Run the itemized versus standard comparison with your actual numbers before you count on a mortgage interest break. For many buyers today the standard deduction wins, and that is fine, the home still builds equity.
Keep your 1098 and your closing documents organized, and if you buy points at closing, know that those points are often deductible in the year of purchase. A quick conversation with a tax professional before your first filing as a homeowner can save you from guessing.
Call 215-598-6848 or schedule a free consultation, and I will help you plan the purchase side while you sort out the tax side with your advisor.
Smarty's Advice Expert Insight
John Smart (Smarty) · Smarty Home Solutions / eXp Realty Agent, AI Certified Agent
Beyond the interest itself, a few related costs can be deductible. Points you paid to lower your mortgage rate are generally deductible as interest, often in the year you bought the home. Your closing disclosure shows the points, and your lender reports them on Form 1098. If the points were paid for a refinance, the deduction is usually spread over the life of the new loan instead.
Mortgage insurance premiums have been deductible in some years and not in others, depending on the tax law in effect. Do not assume your PMI or FHA mortgage insurance is deductible, check the rules for the tax year you are filing. Your 1098 will note whether mortgage insurance was reported, but the deductibility depends on current law and your income.
If you are self-employed and work from home, a home office can add its own deductions, but it interacts with the mortgage interest rules in complicated ways. A tax professional is the right person to sort out the combination. The key is to keep your 1098, your closing disclosure, and your improvement and refinance documents together so your preparer has everything.