Mortgage rates are up, and that higher payment hurts. The tax code isn't going to make that increase disappear either. But before you simply absorb the entire cost, make sure you're getting every tax benefit you're legally entitled to. Higher mortgage interest can change whether it makes sense to itemize, it can increase the value of a legitimate home office deduction, and certain points or costs you paid to get the loan may create another deduction entirely.
Is Mortgage Interest Tax Deductible?
Yes, mortgage interest can be tax deductible, but how you deduct it depends on what the property is used for and the type of mortgage expense you're paying.
If we're talking about your primary residence, qualified mortgage interest generally falls on the personal side of your tax return as an itemized deduction. That means you need enough total itemized deductions to make itemizing more valuable than taking the standard deduction. If part of your home is legitimately used as a home office for your business, a portion of certain housing expenses may instead factor into the home office deduction. Rental property is another conversation because we're dealing with a business or investment expense rather than a personal itemized deduction.
Then we've got points, refinancing costs, rate buydowns, and all the other numbers buried in that lovely stack of paperwork you signed at closing. So don't ask only, "Can I deduct my mortgage?" The better question is: Which mortgage-related costs can I deduct, where do I deduct them, and when do I get the deduction?
1. Higher Mortgage Interest Could Make Itemizing More Valuable
For the last several years, a lot of taxpayers haven't cared nearly as much about the mortgage interest deduction. The standard deduction became so large that millions of taxpayers simply took it instead of itemizing. At the same time, the deduction for state and local taxes, commonly called the SALT deduction, was limited.
The equation has changed. For 2026, the standard deduction is $16,100 for single filers and $32,200 for married couples filing jointly. Recent changes to the SALT deduction have also increased the amount certain taxpayers may be able to deduct for qualifying state and local taxes. Now combine that with higher mortgage rates. If you're paying significantly more qualified mortgage interest than you were several years ago, suddenly your itemized deductions may be worth another look.
Think about the expenses that may end up on Schedule A. You could have qualified mortgage interest, deductible state and local taxes subject to the applicable limitations, charitable contributions, and other qualifying itemized deductions depending on your situation. Add those together and compare the result with your standard deduction. If your allowable itemized deductions are higher, itemizing may produce the better tax result.
This is why I don't want homeowners automatically doing the same thing on their tax return year after year. Your mortgage changed. Tax law changed. Your income may have changed. Your property taxes may have changed. Run the numbers again.
Now, don't get carried away and think higher interest is somehow free because you get a deduction. If you pay another $5,000 in deductible mortgage interest, that generally doesn't mean you save $5,000 in taxes. A deduction reduces the income subject to tax. It isn't a dollar-for-dollar tax credit. You're still spending real money on interest. The goal is simply to make sure that if you're paying the expense anyway, you're capturing every legitimate tax benefit associated with it.
Also, don't look at your entire mortgage payment and assume it's deductible. Part of your payment goes toward principal, which is repayment of the money you borrowed. Another portion may be interest, and you may also be paying amounts into escrow for property taxes and homeowners insurance. Those amounts don't all receive the same tax treatment.
Your lender will generally provide Form 1098 showing certain mortgage interest and potentially points reported for the year. Keep it with your tax records. If you bought, sold, or refinanced property during the year, I also want the closing documents because there may be additional costs we need to analyze.
2. Business Owners Should Revisit the Home Office Deduction
Now let's move over to my business owners because this is where the conversation gets more interesting. If you're legitimately operating a business from your home, I want you at least considering the home office deduction.
There are generally two ways we might calculate it: the simplified method and the actual expense method. Under the simplified method, the deduction is based on the allowable square footage of the qualifying business space and the IRS-prescribed rate. The actual expense method requires more work, but depending on your housing costs, it can also produce a larger deduction. Higher mortgage interest is one reason I want you comparing the two.
With the actual expense method, we determine the portion of your home legitimately used for the business and then allocate qualifying indirect household expenses based on the appropriate business-use percentage. That may include expenses such as utilities, certain repairs, insurance, property taxes, depreciation, and mortgage interest, subject to the rules applicable to each expense.
Let's say your qualifying home office represents 10% of your home's allowable business-use area. That doesn't mean we blindly deduct 10% of everything you spend on the house, but it gives us a starting point for allocating qualifying indirect expenses between personal and business use. If mortgage interest has increased substantially, the portion attributable to the qualifying home office may also become more significant. That's why I don't want you automatically choosing the simplified method because it's easier. Compare the methods. The easier calculation isn't necessarily the better deduction.
There is one important rule here: you don't get to deduct the same expense twice. If a qualifying portion of your mortgage interest is attributable to your home office under the actual expense method, we need to properly allocate that amount between the business and personal portions. You don't get to take the same dollar of mortgage interest as both a home office expense and a personal itemized deduction.
That allocation can be particularly valuable for someone who is self-employed because business income may potentially be subject to both income tax and self-employment tax. That's one reason I spend so much time teaching small business owners to understand their legitimate business deductions. If you qualify for the home office deduction, use it, document it properly, and calculate it correctly.
Of course, working at your kitchen table occasionally doesn't automatically turn part of your mortgage into a business deduction. Generally, your home office needs to satisfy IRS requirements involving the regular and exclusive business use of the space, along with requirements concerning how that space is used in your trade or business. If you've got a legitimate qualifying home office, fantastic. Now determine which calculation gives you the best result. If you don't qualify, higher mortgage rates don't magically create a home office deduction.
3. Review Mortgage Points and Rate Buydowns
Now let's move away from the expenses you're paying every month and look at what happened when you got the loan. If you bought a home, refinanced, purchased a second home, or acquired rental property, pull out your closing documents. I want to know whether you paid mortgage points or other costs associated with obtaining the loan or reducing the interest rate.
Mortgage points generally represent prepaid interest paid to obtain a mortgage, but whether you can deduct those points immediately or have to deduct them over time depends on the transaction and whether the applicable tax requirements are satisfied. Points associated with the purchase or improvement of a primary residence may qualify for a current deduction when specific requirements are met. Points associated with refinancing are generally deducted over the life of the new loan rather than entirely in the year they're paid, although special rules can apply. Points associated with a second home are also generally spread over the life of the loan.
Rate buydowns require another layer of analysis. Maybe you paid additional money at closing to obtain a lower interest rate. Maybe the seller paid something. Maybe the builder or lender offered an incentive. We need to know who actually paid the cost and what the payment represented. Was it prepaid interest attributable to you, or was somebody else funding the incentive? You can't take a deduction for an expense simply because the charge appeared somewhere in the transaction.
And don't assume every line on your closing statement is mortgage interest. You may have paid appraisal fees, title charges, processing costs, recording fees, legal expenses, loan costs, and other charges. They don't all receive the same tax treatment. Some costs may affect the basis of the property. Some may be financing costs. Some may be deductible under the applicable rules, while others aren't currently deductible at all.
This is why I want you saving the entire closing package, not just Form 1098. If you bought or refinanced property this year, give your tax professional the documents and let them determine what each expense actually represents.
What About Mortgage Interest on Rental Property?
Rental property deserves its own distinction because we're no longer talking about interest associated solely with your personal residence. Interest on debt properly associated with a rental property may generally be deductible as a rental expense, subject to the applicable tax rules and limitations. That means the analysis is fundamentally different from deciding whether you have enough personal expenses to itemize.
This becomes especially important if you're refinancing properties, moving borrowed money between accounts, using loan proceeds for different purposes, or borrowing against one property to invest somewhere else. Don't automatically assume that the property securing the debt determines where the interest deduction belongs. How you use the loan proceeds can matter.
Again, documentation is everything. Save your Forms 1098, settlement statements, closing disclosures, records of property taxes actually paid, and documentation showing how borrowed funds were used. If you're claiming a home office, document the space and your business-use calculation as well.
Don't wait until March or April and then try to reconstruct everything from your bank account. When mortgage costs are significant, several different parts of your tax return may be affected by the same property. I want those pieces coordinated.
Higher Mortgage Rates Aren't Good, but Don't Waste the Tax Benefit
I'm not going to tell you that higher mortgage rates are somehow fantastic because you might get a larger deduction. They're still costing you real money. But there's a difference between paying higher interest and paying higher interest while also missing a deduction you were entitled to take.
If you're a homeowner, rerun the itemized deduction analysis. If you're a business owner with a legitimate home office, compare the simplified and actual expense methods. If you bought or refinanced property, review your points, buydowns, and other loan costs. And if you're a real estate investor, make sure your interest and financing costs are being classified and deducted properly for the transaction involved.
The Bottom Line
Your mortgage isn't one giant tax deduction. Interest, principal, property taxes, home office expenses, points, buydowns, and other closing costs can all receive different tax treatment. Higher rates make it even more important to know exactly what you're paying and where those expenses belong on your tax return. Run the numbers, keep the documentation, and make every eligible dollar work as hard as possible.
If you're a business owner or real estate investor and want to make sure your mortgage, home office, real estate, and larger tax strategy are actually working together, Book a Comprehensive Tax and Business Consultation with my law firm, KKOS Lawyers. We'll review the numbers, identify the deductions that actually apply, and look at how they fit with the rest of your tax and business structure.
Don't discover at tax time that you left legitimate deductions sitting on the table. Build the strategy while you still have time to use it.
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Frequently Asked Questions
Is mortgage interest always tax deductible?
No. The deduction depends on the property, how the loan proceeds are used, and whether you meet the applicable tax requirements.
Do I have to itemize to deduct mortgage interest?
For qualified mortgage interest on a personal residence, generally yes. Business or rental property interest is treated differently.
Can I deduct my entire mortgage payment?
No. Principal isn't mortgage interest, and other amounts included in your payment may receive different tax treatment.
Can I deduct mortgage interest through my home office?
Potentially. If you qualify for the home office deduction and use the actual expense method, a portion of eligible mortgage interest may be included.
Are mortgage points deductible?
They can be. Whether points are deductible immediately or over the life of the loan depends on the property and transaction.
Are mortgage rate buydowns tax deductible?
Possibly. The tax treatment depends on what the buydown represents, who paid it, and the terms of the transaction.
