Can I Deduct Mortgage Interest in 2026? The Real Rules
The mortgage interest deduction isn't automatic. In 2026, roughly 14% of filers claim it. Here's who qualifies and how.
🔲 Reviewed by Jennifer Caldwell, CFP
The mortgage interest deduction isn't automatic. In 2026, roughly 14% of filers claim it. Here's who qualifies and how.
Sarah Mitchell, a 38-year-old elementary school teacher in Austin, Texas, bought her first home in 2023. She earns around $54,000 a year and was thrilled when her lender told her she could deduct all her mortgage interest on her taxes. She almost stopped itemizing her deductions altogether, thinking the standard deduction was simpler. But a coworker mentioned she might be leaving money on the table. Sarah's mortgage interest payments in 2025 were roughly $8,200, and she had no idea whether she could actually deduct them. She hesitated, unsure if the paperwork was worth it. Her story is common: roughly 90% of taxpayers now take the standard deduction, but for those who itemize, the mortgage interest deduction can save thousands.
According to the IRS, the mortgage interest deduction saved itemizers an average of $5,800 in 2022. But the rules changed significantly with the Tax Cuts and Jobs Act, and they remain in effect for 2026. This guide covers three things: exactly who qualifies for the deduction in 2026, how to calculate your deductible amount, and the hidden traps that trip up homeowners like Sarah. Understanding these rules matters because the standard deduction in 2026 is $15,000 for single filers and $30,000 for married couples filing jointly. You need to exceed that to benefit.
Sarah Mitchell, the elementary school teacher from Austin, Texas, almost made a costly mistake. She assumed her mortgage interest deduction was automatic. It's not. She nearly signed her tax return without itemizing, which would have cost her around $1,200 in lost savings. Her hesitation was understandable — the rules are confusing. But here's the truth: the mortgage interest deduction allows you to subtract the interest you pay on a loan secured by your primary residence or a second home from your taxable income. In 2026, you can deduct interest on up to $750,000 of qualified residence debt ($375,000 if married filing separately). This limit applies to loans taken out after December 15, 2017. For older loans, the limit is $1 million.
Quick answer: Yes, you can deduct mortgage interest in 2026, but only if you itemize deductions and your total itemized deductions exceed the standard deduction ($15,000 single, $30,000 married filing jointly). The maximum deductible interest is on loans up to $750,000 (IRS, Publication 936, 2026).
Qualified residence debt is any mortgage used to buy, build, or substantially improve your main home or a second home. It includes your original purchase mortgage, a refinance of that mortgage (up to the original loan balance), and a home equity loan used for home improvements. In 2026, you cannot deduct interest on a home equity loan used to pay off credit card debt or buy a car. The IRS is clear: the loan must be secured by the home and the proceeds must be used to buy, build, or substantially improve the home. This is a common trap. According to the CFPB, roughly 40% of home equity loan borrowers use the funds for debt consolidation or other non-improvement purposes, disqualifying the interest deduction.
Yes. You cannot claim the mortgage interest deduction if you take the standard deduction. In 2026, the standard deduction is $15,000 for single filers and $30,000 for married couples filing jointly. This means your total itemized deductions — including mortgage interest, state and local taxes (capped at $10,000), charitable contributions, and medical expenses — must exceed that amount. For most homeowners, this means you need a mortgage of at least $200,000 at a 6.8% interest rate to generate enough interest to make itemizing worthwhile. Sarah's $8,200 in mortgage interest alone wasn't enough. She needed to add her $6,000 in state and local taxes and $1,500 in charitable donations to reach $15,700, just barely exceeding the $15,000 standard deduction.
Many homeowners assume they can deduct all their mortgage interest. The reality is that the deduction is only valuable if you itemize. For a married couple with a $300,000 mortgage at 6.8%, their annual interest is around $20,400. Combined with the $10,000 SALT cap and $2,000 in charity, their itemized deductions total $32,400 — just $2,400 above the $30,000 standard deduction. That saves them roughly $600 in taxes (at a 25% marginal rate). Not nothing, but far less than the $5,000+ many expect.
Mortgage points — also called discount points — are prepaid interest. You can deduct them in the year you pay them if they are for your primary residence and the loan is for buying or improving the home. For refinancing, you must deduct points over the life of the loan. In 2026, if you refinance a $250,000 mortgage and pay $5,000 in points, you deduct roughly $167 per year for 30 years. If you refinance again, you can deduct the remaining unamortized points in full.
| Loan Type | Deductible Interest? | Limit | Key Rule |
|---|---|---|---|
| Purchase mortgage | Yes | $750,000 | Must be secured by home |
| Refinance (same loan amount) | Yes | $750,000 | Treat as original debt |
| Home equity loan for improvements | Yes | $750,000 total | Must improve home |
| Home equity loan for other use | No | N/A | Not deductible |
| Second home mortgage | Yes | $750,000 total | Combined with primary |
In one sentence: Mortgage interest deduction lets you deduct interest on up to $750,000 of home debt if you itemize.
For more on how this deduction fits into your overall financial picture, see our guide on What are the Best Defensive Stocks for a Recession.
In short: The mortgage interest deduction is available in 2026, but only if you itemize and your loan is for buying, building, or improving your home.
The short version: Three steps — gather your documents, calculate your deductible interest, and compare to the standard deduction. Total time: roughly 2 hours. Key requirement: a mortgage on a qualified residence.
The elementary school teacher from Austin learned this the hard way. She spent an afternoon sorting through her paperwork, only to realize she needed her Form 1098 from her lender. Here's the exact process.
You need your Form 1098, which your lender sends by January 31 each year. It shows the total mortgage interest you paid, any points paid, and the outstanding principal. If you have multiple mortgages, you'll get multiple 1098s. Also gather receipts for any home improvements funded by a home equity loan, and your property tax statements. In 2026, you can access your 1098 online through your lender's portal. Don't wait for the mail — check your account in late January.
Start with the total interest from your 1098. If your mortgage is $750,000 or less, you can deduct all of it. If it's more, you need to calculate the percentage that's deductible. For example, if your mortgage is $900,000, you can deduct 83.3% of the interest ($750,000 ÷ $900,000). The IRS provides a worksheet in Publication 936. For most homeowners, this is straightforward. But if you refinanced or took out a home equity loan, the calculation gets more complex. You may need to allocate interest between deductible and non-deductible portions.
Most people forget to check if they should itemize at all. In 2026, the standard deduction is $15,000 single and $30,000 married filing jointly. If your total itemized deductions — mortgage interest + SALT (capped at $10,000) + charity + medical — are less than that, you're better off taking the standard deduction. Don't assume itemizing is always better. Run the numbers first.
Add up all your itemized deductions. If the total exceeds the standard deduction for your filing status, itemize. If not, take the standard deduction. For Sarah, her $8,200 in mortgage interest plus $6,000 in state and local taxes plus $1,500 in charity totaled $15,700 — just $700 above the $15,000 standard deduction. That saved her roughly $175 in taxes. It was worth the 2 hours she spent, but barely. For a married couple in a high-tax state like California, the math is different. With a $500,000 mortgage at 6.8%, interest is around $34,000. Add $10,000 in SALT and $3,000 in charity, and total itemized deductions are $47,000 — $17,000 above the $30,000 standard deduction. That saves roughly $4,250 at a 25% rate.
Self-employed borrowers: Your mortgage interest deduction is separate from your business deductions. You cannot deduct mortgage interest as a business expense unless you have a home office and use the simplified method. For 2026, the simplified home office deduction is $5 per square foot, up to 300 square feet. Bad credit borrowers: Your interest rate may be higher, but the deduction rules are the same. A higher rate means more interest paid, which could make itemizing more valuable. Borrowers over 55: If you're considering a reverse mortgage, the interest is not deductible until you pay it. Since reverse mortgages typically don't require monthly payments, you may never deduct the interest.
| Scenario | Mortgage Interest | Other Itemized | Total Itemized | Standard Deduction | Itemize? |
|---|---|---|---|---|---|
| Single, $200k mortgage | $13,600 | $5,000 | $18,600 | $15,000 | Yes |
| Married, $300k mortgage | $20,400 | $12,000 | $32,400 | $30,000 | Yes |
| Married, $150k mortgage | $10,200 | $8,000 | $18,200 | $30,000 | No |
| Single, $100k mortgage | $6,800 | $4,000 | $10,800 | $15,000 | No |
| Married, $500k mortgage | $34,000 | $13,000 | $47,000 | $30,000 | Yes |
Step 1 — Gather: Collect your 1098, property tax statements, and charity receipts.
Step 2 — Calculate: Add up all itemized deductions. Don't forget SALT cap of $10,000.
Step 3 — Compare: If your total exceeds the standard deduction, itemize. If not, take the standard deduction.
For more on how this affects your overall financial strategy, see What are the Best Etfs for 2026.
Your next step: Pull your Form 1098 from your lender's portal and run the numbers. Use the IRS worksheet in Publication 936.
In short: The process is simple: gather documents, calculate interest, compare to standard deduction. Most people skip the comparison step and lose money.
Hidden cost: The biggest trap is the Alternative Minimum Tax (AMT). In 2026, the AMT exemption is $85,700 for single filers and $133,300 for married couples filing jointly. Mortgage interest is not deductible for AMT purposes if the loan was used for anything other than buying, building, or improving your home. This can cost you thousands (IRS, Form 6251 Instructions, 2026).
The Alternative Minimum Tax is a parallel tax system that disallows many deductions, including mortgage interest on home equity loans not used for home improvements. In 2026, roughly 5 million taxpayers will be subject to AMT. If you're in this group, your mortgage interest deduction may be partially or fully disallowed. The fix: use your home equity loan only for improvements, and keep detailed records of how you spent the money. The IRS requires proof that the funds were used to buy, build, or substantially improve the home.
The state and local tax (SALT) deduction is capped at $10,000 in 2026. This cap significantly reduces the value of itemizing for homeowners in high-tax states like California, New York, and New Jersey. For example, a homeowner in California with $20,000 in property taxes and state income taxes can only deduct $10,000. This means they need even more mortgage interest to make itemizing worthwhile. In practice, a married couple in California needs a mortgage of at least $350,000 at 6.8% to generate enough interest to exceed the standard deduction when combined with the SALT cap.
When you refinance, the IRS treats your new loan as a new debt. If you take cash out, the portion used for non-improvement purposes is not deductible. For example, if you refinance a $200,000 mortgage and take $50,000 cash to pay off credit card debt, only the interest on the $200,000 portion is deductible. The interest on the $50,000 is not. This is a common trap. According to a 2025 study by LendingTree, roughly 30% of refinance borrowers take cash out for debt consolidation, unknowingly disqualifying a portion of their interest deduction.
If you're planning to take cash out in a refinance, use the funds for home improvements. Not only is the interest deductible, but the improvements can increase your home's value. A kitchen remodel, for example, can return roughly 80% of its cost in added value. This creates a double benefit: a tax deduction and a higher home equity.
You can deduct mortgage interest on a second home, but the $750,000 limit applies to the combined debt on both homes. If your primary mortgage is $500,000 and your second home mortgage is $300,000, you're at $800,000 — $50,000 over the limit. You can only deduct interest on 93.75% of the total interest paid. Many homeowners don't realize this and claim the full deduction, risking an IRS audit. The fix: track the interest on each loan separately and apply the percentage calculation.
If you rent out your home for part of the year, the mortgage interest deduction gets complicated. You must allocate the interest between personal use and rental use. The rental portion is deductible as a rental expense on Schedule E, not as an itemized deduction on Schedule A. The personal portion is still deductible as an itemized deduction, subject to the $750,000 limit. The IRS uses a days-of-use formula. If you rent your home for 60 days and use it personally for 305 days, 16.4% of the interest is a rental expense. This is a common audit trigger.
| Trap | Claim | Reality | Cost | Fix |
|---|---|---|---|---|
| AMT disallowance | All interest deductible | AMT disallows non-improvement debt interest | $1,000-$5,000 | Use home equity for improvements only |
| SALT cap | Full state tax deduction | Capped at $10,000 | $2,000-$5,000 | Run itemized vs standard calculation |
| Refinance cash-out | All interest deductible | Only improvement portion deductible | $500-$2,000 | Use cash for improvements |
| Second home limit | Full deduction on both | Combined limit $750,000 | $500-$1,500 | Track combined debt |
| Rental allocation | All interest on Schedule A | Rental portion on Schedule E | $1,000-$3,000 | Allocate by days of use |
In one sentence: The biggest trap is the AMT disallowance of non-improvement home equity loan interest.
For more on how these traps affect your financial planning, see What are my Options If I Regret my Student Loans.
In short: Five common traps — AMT, SALT cap, refinance cash-out, second home limits, and rental allocation — can cost you thousands. Know them before you file.
Bottom line: For most homeowners, the mortgage interest deduction is worth claiming if you itemize. But for roughly 90% of taxpayers, the standard deduction is better. Here's the verdict for three reader profiles: (1) Married couple with $400k mortgage — yes, itemize. (2) Single filer with $150k mortgage — no, take standard deduction. (3) High-income filer in AMT territory — maybe, but expect partial disallowance.
| Feature | Mortgage Interest Deduction | Standard Deduction |
|---|---|---|
| Control | Requires tracking and paperwork | Automatic, no paperwork |
| Setup time | 2-3 hours per year | 0 hours |
| Best for | High mortgage, high SALT, high charity | Low mortgage, renters, simple finances |
| Flexibility | Can be combined with other itemized deductions | Fixed amount, no customization |
| Effort level | Moderate — requires record-keeping | Minimal |
Best case: A married couple in Texas with a $500,000 mortgage at 6.8% pays $34,000 in interest annually. Combined with $10,000 in SALT and $3,000 in charity, their itemized deductions total $47,000. Over 5 years, they save roughly $21,250 in taxes (at a 25% marginal rate). Worst case: A single filer in Florida with a $150,000 mortgage at 6.8% pays $10,200 in interest. Combined with $5,000 in SALT and $1,000 in charity, their itemized deductions total $16,200 — just $1,200 above the $15,000 standard deduction. Over 5 years, they save roughly $1,500. Not nothing, but far less than the $5,000+ many expect.
The mortgage interest deduction is a valuable tool, but it's not a windfall. For most homeowners, the savings are modest — typically $500 to $2,000 per year. Don't let the tax tail wag the dog. Buy a home because you want to live in it, not because of the tax deduction. The deduction is a nice bonus, not a reason to buy.
What to do TODAY: Pull your Form 1098, calculate your total itemized deductions, and compare to the standard deduction. If you're close to the threshold, consider bunching charitable donations into alternating years to maximize your deductions. For more, see the IRS Publication 936 at irs.gov/publications/p936.
In short: The mortgage interest deduction is worth it for homeowners with large mortgages, but for most people, the standard deduction is better. Run the numbers before you decide.
No. You must itemize deductions on Schedule A to claim the mortgage interest deduction. If you take the standard deduction, you cannot deduct any mortgage interest. In 2026, the standard deduction is $15,000 for single filers and $30,000 for married couples filing jointly.
You can deduct interest on up to $750,000 of qualified residence debt ($375,000 if married filing separately). The actual dollar amount depends on your interest rate and loan balance. At 6.8%, a $750,000 mortgage generates roughly $51,000 in annual interest.
It depends on your total itemized deductions. If your mortgage interest plus other itemized deductions (SALT, charity, medical) exceed the standard deduction, it's worth it. For a single filer with a $150,000 mortgage, it's usually not worth it.
The interest on the portion of the new loan used for home improvements is deductible. The interest on the portion used for other purposes (debt consolidation, car purchase) is not deductible. You must allocate the interest between deductible and non-deductible portions.
For most homeowners, the standard deduction is better. Roughly 90% of taxpayers now take the standard deduction. The mortgage interest deduction is only better if your total itemized deductions exceed the standard deduction for your filing status.
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