Can I Deduct Mortgage Interest in 2025? – The mortgage interest deduction remains one of the most valuable tax breaks for U.S. homeowners in 2025. If you paid interest on a mortgage or home equity loan in 2025, you may be able to reduce your taxable income—but only if you meet IRS requirements and choose to itemize deductions.
This guide breaks down the exact rules from IRS Publication 936 (for 2025 returns), eligibility, debt limits, and step-by-step instructions so you can maximize your savings when filing your 2025 taxes.
What Is the Mortgage Interest Deduction?
The home mortgage interest deduction lets you subtract the interest you paid on a qualified home loan from your taxable income. It applies to loans secured by your main home or a second home.
You can claim it only on qualified home mortgage interest—generally interest on debt used to buy, build, or substantially improve the home that secures the loan. Personal interest (such as credit card debt) does not qualify, even if secured by your home.
Who Qualifies to Deduct Mortgage Interest in 2025?
To claim the deduction, you must meet these IRS tests:
- You file Form 1040 or 1040-SR and itemize deductions on Schedule A.
- The mortgage is a secured debt (the home is collateral under state law).
- You have an ownership interest in a qualified home (main home or second home) that has sleeping, cooking, and toilet facilities.
- Both you and the lender intended the loan to be repaid.
Qualified homes include houses, condos, cooperatives, mobile homes, house trailers, and even boats or RVs that meet the living facilities test. You can designate only one second home per year.
Mortgage Interest Deduction Limits for 2025
The IRS caps the amount of debt on which you can deduct interest. For 2025:
- Loans taken out after December 15, 2017: You can deduct interest on up to $750,000 of mortgage debt ($375,000 if married filing separately).
- The limit applies to the combined total of your main home and second home mortgages.
These limits were made permanent by recent legislation, providing long-term certainty for homeowners.
Important: The debt limit is based on the average balance during the year, not the original loan amount. If your mortgage exceeds the limit, you must use the IRS worksheet in Publication 936 to calculate the deductible portion.
Grandfathered Mortgages: Pre-2017 Loans
If you (or your spouse) took out the mortgage on or before December 15, 2017 (or under a binding contract before that date with closing rules met), you may qualify for the higher $1 million limit ($500,000 if married filing separately).
Grandfathered debt includes:
- Mortgages secured by October 13, 1987 (pre-TCJA grandfathered rules).
- Home acquisition debt incurred after October 13, 1987, but before December 16, 2017.
Refinancing pre-2017 debt generally keeps the higher limit as long as the new loan does not exceed the old balance.
What About Home Equity Loans and HELOCs in 2025?
Home equity loans and lines of credit (HELOCs) follow stricter rules in 2025:
- Interest is deductible only if the loan proceeds were used to buy, build, or substantially improve the home that secures the loan.
- There is no separate $100,000 limit anymore—the interest counts toward your overall $750,000 (or $1 million grandfathered) debt cap.
Cash-out refinances or loans used for other purposes (vacations, debt consolidation, etc.) do not qualify.
How to Claim the Mortgage Interest Deduction on Your 2025 Taxes?
- Receive Form 1098 from your lender(s) showing mortgage interest paid in 2025.
- Report the interest on Schedule A (Form 1040):
- Line 8a: Interest and points reported on Form 1098.
- Line 8b: Other deductible home mortgage interest not on Form 1098.
- Line 8c: Points not reported on Form 1098.
- If your total mortgage debt exceeds the limit, complete the Worksheet to Figure Your Qualified Loan Limit in Publication 936 (Table 1) to prorate the deduction.
- Points paid in 2025 may be fully deductible in some cases (e.g., for buying or improving your main home) or amortized over the loan term.
Keep records of loan documents, settlement statements, and how proceeds were used.
Do You Need to Itemize Deductions?
The mortgage interest deduction is an itemized deduction. For 2025, compare your total itemized deductions (mortgage interest + property taxes + charitable contributions + medical expenses, etc.) against the standard deduction.
Many homeowners find the standard deduction more beneficial unless they have significant mortgage interest or other deductible expenses. Consult a tax professional to run the numbers.
Common Scenarios and Examples
- New homebuyer in 2025: $600,000 mortgage → full interest deductible.
- Large mortgage ($900,000 post-2017): Only interest on the first $750,000 qualifies.
- Pre-2017 mortgage refinanced: Often keeps the $1 million limit.
- Home equity loan for kitchen remodel: Deductible (used to improve the home).
- Home equity loan for car purchase: Not deductible.
Changes and Reminders for 2025
- Mortgage insurance premiums (PMI/MIP) deduction expired and cannot be claimed.
- No deduction for interest on loans not used for home purchase, construction, or improvement.
- The $750,000 limit is now permanent (no scheduled reversion).
Frequently Asked Questions About Mortgage Interest Deduction in 2025
Can I deduct mortgage interest if I take the standard deduction?
No—you must itemize on Schedule A.
Does it matter if I rent out my second home?
Partial-year rental is allowed if you use it personally for the greater of 14 days or 10% of rental days.
What if I have multiple mortgages?
Add them together and apply the debt limits to the total.
Are there state tax differences?
Some states conform to federal rules; others do not. Check your state tax agency.
Conclusion: Is the Mortgage Interest Deduction Worth It for You in 2025?
Yes, the mortgage interest deduction can save thousands of dollars for eligible U.S. homeowners in 2025—if you itemize and stay within IRS limits. The rules are straightforward but depend on when your loan was originated and how the funds were used.
For personalized advice, review IRS Publication 936 or consult a qualified tax professional or CPA. Tax laws can be complex, and this article is for informational purposes only—not tax advice.
Download the latest IRS Publication 936 and Schedule A instructions at IRS.gov to prepare your 2025 return accurately and claim every deduction you deserve.