The Mortgage Interest Deduction in 2026: A Bigger Benefit Than Most Homeowners Realize

Most homeowners assume the mortgage interest deduction doesn't really apply to them anymore, and for a lot of the last several years, that assumption was often right. The standard deduction nearly doubled back in 2018, and a $10,000 cap on state and local tax deductions meant a lot of homeowners simply couldn't itemize their way past what they'd already get for free.

What most people don't realize is that the math shifted meaningfully as of the 2026 tax year. The cap on state and local tax deductions jumped from $10,000 to $40,400, and the mortgage interest deduction's $750,000 limit was made permanent. Together, that's enough to put itemizing back in play for a real number of homeowners who wrote it off years ago, and most haven't updated their assumptions to reflect it. Whether it actually helps you depends heavily on one thing: your filing status.

The Numbers You're Actually Comparing

Itemizing only helps if your total itemized deductions, mortgage interest, state and local taxes, charitable giving, add up to more than your standard deduction. For 2026, the standard deduction is:

• $16,100 for single filers
• $24,150 for head of household
• $32,200 for married couples filing jointly

That gap between $16,100 and $32,200 is the whole story of why this affects single filers and married couples very differently, even when they're carrying the exact same mortgage.

A Worked Example: Single Filer

Say you're single, carrying a $400,000 mortgage at 6.75%. In the first year, you'd pay roughly $26,870 in mortgage interest alone, before any principal reduction even factors in. Add a property tax bill of $7,000, well within the new $40,400 SALT cap, and your itemized total comes to $33,870.

Compare that to your $16,100 standard deduction, and itemizing puts nearly $17,800 in additional deductions on the table. That's not a marginal win, that's a substantial reduction in taxable income you'd be leaving on the table by taking the standard deduction instead.

Here's what that actually means for your real monthly cost, not just your tax return. A single filer carrying a $400,000 mortgage alone typically needs income in the $110,000 to $150,000 range to qualify under standard debt-to-income guidelines, which lands squarely in the 24% federal marginal tax bracket. At 24%, that $17,770 in additional deductions translates to roughly $4,265 in actual tax savings for the year, about $355 a month. Your mortgage payment on paper is $2,594. Your effective monthly cost, once you account for what you're saving in taxes, works out closer to $2,239. That's the number that actually reflects what homeownership is costing you, not the sticker payment alone.

A Worked Example: Married Filing Jointly

Now take the identical mortgage and identical property tax bill, $26,870 in interest, $7,000 in property tax, same $33,870 itemized total, but this time for a married couple filing jointly. Their standard deduction is $32,200.

The math still favors itemizing, but barely, about $1,670 in additional deductions rather than the nearly $17,800 gap in the single filer's example. A married couple carrying that same $400,000 loan together typically needs less combined income to qualify than a single borrower would need alone, often keeping them under the $211,400 threshold for the 24% bracket and in the 22% bracket instead. At 22%, that $1,670 works out to roughly $367 a year in actual tax savings, about $31 a month. On the identical $2,594 payment, that brings the effective monthly cost down to about $2,563, a real but modest difference, nowhere near the impact the same mortgage delivers for a single filer.

For a lot of married couples with a single, moderate mortgage, itemizing on the mortgage interest deduction alone provides only marginal benefit over just taking the standard deduction. It usually takes additional deductions, a higher property tax bill, charitable contributions, or a larger loan amount, to make itemizing clearly worthwhile for a married couple.

Why This Matters More in High-Property-Tax States

This math shifts even further in states with genuinely high property taxes. In a state like New Hampshire or New Jersey, where property tax bills can run well into five figures on a mid-range home, a single filer or a married couple with a bigger tax bill clears the standard deduction threshold that much faster, and the old $10,000 SALT cap used to choke off a big chunk of that benefit before 2026. With the cap now at $40,400, most homeowners outside the very highest tax bills won't hit it at all, which means the full property tax bill can now factor into the itemizing decision in a way it simply couldn't a few years ago.

For a deeper look at how property tax rates vary town to town, which matters as much for this math as it does for your monthly payment, see our guides to New Hampshire property tax rates and the most affordable places to live in New Jersey.

One More Thing Coming Back in 2026: PMI Deductibility

If you're paying private mortgage insurance because you put down less than 20%, worth knowing: mortgage insurance premiums became deductible again as of the 2026 tax year, treated the same as mortgage interest for this purpose. This deduction existed years ago, disappeared, and is now back. If you're running the math on whether itemizing makes sense, don't forget to add your PMI premiums into the total alongside your mortgage interest.

Why This Benefit Shrinks Over Time

One thing worth understanding upfront: the mortgage interest deduction isn't a fixed benefit for the life of your loan. Every mortgage payment shifts gradually from mostly interest toward mostly principal, and since only the interest portion is deductible, your deduction shrinks every year you own the home, even though your payment stays the same.

On that same $400,000 loan at 6.75%, here's how the deductible interest actually declines over time:

• Year 1: roughly $26,870 in interest
• Year 5: roughly $25,550
• Year 10: roughly $23,320
• Year 15: roughly $20,190

For the single filer in the example above, that declining interest figure means the itemizing decision gets re-evaluated every year, not decided once at closing. Ten years in, that same homeowner's itemized total has dropped to roughly $30,320 (with property tax held flat for simplicity), still well above the $16,100 standard deduction, but the gap has narrowed. For the married couple in the second example, that shrinking interest deduction could eventually erase the itemizing benefit entirely, pushing them back to the standard deduction sooner than they might expect, particularly if their property tax bill doesn't rise enough to offset it.

Do I need to itemize to get the mortgage interest deduction?
Yes. The mortgage interest deduction only applies if your total itemized deductions exceed your standard deduction. If they don't, you take the standard deduction instead and the mortgage interest deduction provides no additional benefit.

Is there a limit on how much mortgage interest I can deduct?
Yes, interest is deductible on up to $750,000 of mortgage debt for most filers ($375,000 if married filing separately), a limit that was made permanent under recent tax legislation. Larger loan amounts may have higher limits if the debt was taken on before December 16, 2017.

What changed with the SALT deduction cap for 2026?
The cap on deducting state and local taxes, including property taxes, increased from $10,000 to $40,400 for 2026, a significant jump that makes itemizing worthwhile for more homeowners than in recent years. The cap phases down for higher earners above roughly $500,500 in income.

Why does this affect married couples differently than single filers?
Married couples filing jointly have a standard deduction of $32,200, twice the $16,100 for single filers. The same mortgage interest and property tax bill has to clear a much higher bar for a married couple to see meaningful benefit from itemizing.

Should I talk to a tax professional about this?
Yes. This is general information about how the deduction works, not personalized tax advice. Your actual benefit depends on your full tax situation, and a CPA or tax preparer can run your specific numbers accurately.

The Bottom Line

For the first time in years, itemizing is genuinely back on the table for a lot of homeowners, largely thanks to the much higher SALT cap paired with a permanent mortgage interest deduction. Whether it actually benefits you comes down to your filing status, your loan amount, and your property tax bill, single filers tend to see a much clearer win than married couples with the same mortgage. Worth running your specific numbers with a tax professional before you assume either way.

Nate Moghadam | NMLS #906770 | Fairway Independent Mortgage Corporation | Company NMLS #2289 | Equal Housing Lender. This content is for informational purposes only and is not tax, legal, or financial advice, nor a commitment to lend. Tax rules, deduction limits, and standard deduction amounts are subject to change and vary by individual circumstance; consult a qualified tax professional regarding your specific situation. All loans subject to credit and property approval. Legal Disclosures