Buying a house can increase your tax refund, but only if you itemize deductions instead of taking the standard deduction

When you buy a house, you gain access to two deductions that renters do not have: mortgage interest and property taxes. If the sum of these deductions plus other itemized deductions (charitable gifts, state income taxes, medical expenses) exceeds the standard deduction for your filing status, you will report a larger deduction on your tax return. A larger deduction means lower taxable income, which can result in a bigger refund if you had taxes withheld from your paychecks during the year.

However, most homeowners do not see a refund increase. The standard deduction for 2024 is $14,600 for single filers and $29,200 for married couples filing jointly. Your mortgage interest and property taxes combined would need to exceed these amounts before itemizing makes sense. In the first year of homeownership especially, when your mortgage balance is highest and interest payments are largest, you have the best chance of crossing that threshold.

Key Takeaways

  • Mortgage interest and property taxes are only deductible if you itemize deductions on Schedule A, not if you take the standard deduction.
  • You benefit from these deductions only if their total exceeds the standard deduction for your filing status ($14,600 single, $29,200 married filing jointly in 2024).
  • In early years of a mortgage, when interest payments are highest, you are more likely to exceed the standard deduction threshold.
  • A larger deduction lowers your taxable income, which can increase your refund only if you had more tax withheld from paychecks than you owe.
  • State and local tax deductions (including property taxes) are capped at $10,000 per year, which limits the total deduction for many homeowners.

When mortgage interest and property taxes actually increase your refund

Your refund grows only when two conditions are both true: you itemize deductions, and you had too much tax withheld from your paychecks during the year. The deduction itself does not create a refund—it reduces the income the IRS taxes. If you owe $5,000 in federal income tax for the year and had $6,000 withheld, you get a $1,000 refund. If a larger deduction lowers your tax bill to $4,000, your refund becomes $2,000.

Most homebuyers do not see this effect in their first year because they do not adjust their withholding. You set your withholding when you fill out Form W-4 at your job, and most people leave it unchanged after buying a house. To see a refund increase, you would need to file Form W-4 with your employer and claim additional deductions based on your new mortgage interest and property taxes. Without that step, the IRS withholds the same amount as before, and your larger deduction simply reduces what you owe—it does not create a refund.

The standard deduction threshold and the SALT cap

The standard deduction is a flat amount you can deduct without listing individual expenses. For 2024, it is $14,600 if you file single and $29,200 if you file married filing jointly. If your mortgage interest plus property taxes plus other itemized deductions do not exceed these amounts, you are better off taking the standard deduction. Itemizing only helps if your total itemized deductions are higher.

A second limit affects many homeowners: the SALT cap, which stands for state and local taxes. The IRS allows you to deduct a maximum of $10,000 per year in state income taxes, property taxes, and sales taxes combined. If you live in a state with high income tax and high property taxes, you hit this cap quickly. A homeowner in California or New York might deduct $10,000 in property taxes alone and receive no additional benefit from state income tax deductions. This cap has been in place since 2017 and is scheduled to expire after 2025, though Congress may extend it.

How much mortgage interest you can deduct

You can deduct the interest portion of your mortgage payments, but not the principal. In the early years of a 30-year mortgage, most of each payment goes toward interest, so the deduction is substantial. As years pass, more of each payment goes toward principal, and your deduction shrinks. A $400,000 mortgage at 7% interest generates roughly $28,000 in interest in year one, but only about $27,000 in year two, and continues declining.

You can only deduct interest on mortgage debt up to $750,000 of the home's purchase price. If you borrowed $800,000 to buy the house, you can deduct interest only on $750,000 of that debt. This limit applies to mortgages taken out after December 15, 2017. Mortgages from before that date have a higher limit of $1,000,000.

Your mortgage lender sends you a Form 1098 each January showing the interest you paid in the previous year. You use this figure when you file your tax return. If you paid off part of your mortgage or refinanced, the interest amount changes, and your deduction changes with it.

Property tax deductions and the SALT cap interaction

Property taxes are fully deductible as an itemized deduction, but they count toward the $10,000 SALT cap. If your state has no income tax (like Texas or Florida), your entire property tax bill can count toward the cap. If your state has high income tax (like California or New York), your property taxes compete with income tax for the $10,000 limit, and you may not be able to deduct all of them.

Property tax amounts vary dramatically by location and home value. A $500,000 home in a high-tax county might carry $8,000 to $12,000 in annual property taxes, while the same home in a low-tax area might carry $3,000 to $5,000. Check your property tax bill or your county assessor's website to see what you will owe. This figure is essential for deciding whether itemizing makes sense for you.

Adjusting your withholding to see the refund benefit

If you itemize deductions and want to see a larger refund, you must adjust your withholding. Complete a new Form W-4 and submit it to your employer's payroll department. On the form, you can claim deductions for mortgage interest and property taxes, which reduces the amount withheld from each paycheck. At tax time, if you had too much withheld, you receive a refund.

Many people avoid adjusting withholding because they prefer to receive a refund at tax time rather than more money in each paycheck. If that describes you, a larger deduction will not increase your refund unless you also increase your withholding claims. The deduction itself simply lowers your tax bill; it does not force the IRS to refund you money.

Use the IRS withholding calculator at irs.gov to estimate how much you should have withheld based on your new mortgage. The calculator asks about your income, filing status, and deductions, then recommends a withholding amount. You can use this recommendation to fill out your Form W-4 accurately.

When homeownership does not increase your refund

If you take the standard deduction, buying a house does not change your refund at all. Your mortgage interest and property taxes remain non-deductible, and your tax bill is calculated the same way as before. This is the case for roughly 90% of taxpayers, because the standard deduction is high enough that most people benefit more from taking it than from itemizing.

Even if you itemize, your refund does not increase unless you adjust your withholding. A larger deduction lowers your tax bill, but if you had the same amount withheld as in previous years, you simply owe less—you do not receive a refund. To see a refund increase, you must have more withheld than you owe, and that requires a deliberate change to your Form W-4.

Frequently Asked Questions

Will I automatically get a bigger refund after I buy a house?

No. A bigger deduction lowers your tax bill, but does not create a refund by itself. You receive a refund only if you had more tax withheld from your paychecks than you owe. To see a refund increase, you must file a new Form W-4 with your employer and claim deductions for your mortgage interest and property taxes.

What if my mortgage interest and property taxes are less than the standard deduction?

Then you should take the standard deduction instead of itemizing. You will receive no tax benefit from homeownership. This is common in areas with low property taxes or for buyers with smaller mortgages. The standard deduction is usually the better choice.

Does refinancing my mortgage affect my tax refund?

Refinancing changes the amount of interest you pay each year, which changes your deduction if you itemize. A cash-out refinance (borrowing more than you owe) increases your interest payments and your deduction. A rate-and-term refinance (same loan amount, different rate) changes only the interest amount, not the principal. Your Form 1098 from the lender will show the new interest figure for your tax return.

Can I deduct points I paid at closing?

Yes, if you meet certain conditions. Points paid to lower your interest rate are deductible over the life of the loan (roughly $100 per year on a $10,000 points payment for a 30-year mortgage). Points paid for services are not deductible. Your lender will tell you which category your points fall into on your Closing Disclosure form.

What happens to my deduction if I pay off my mortgage early?

Your deduction shrinks as you pay down the principal, because less of each payment goes toward interest. If you pay off the mortgage entirely, you lose the deduction. Some people avoid large principal payments in early years to preserve the deduction, though this is rarely the best financial choice overall.