If you're a homeowner, you're already building equity with every mortgage payment. But here's something that might interest you even more: the government is literally rewarding you for owning your home through tax deductions. In 2026, the mortgage interest deduction is one of the most valuable tax benefits available to homeowners, and if you haven't been taking advantage of it, you could be leaving money on the table.

As a real estate agent here in Salem, New Hampshire, I've helped countless clients understand that homeownership isn't just about having a place to live. It's a financial advantage over renting in ways that many people don't fully appreciate. One of those advantages is the ability to reduce your tax burden through deductions that renters simply don't qualify for. Let's talk about what you need to know about the mortgage interest deduction and how it could put money back in your pocket.

What is the Mortgage Interest Deduction?

The mortgage interest deduction allows homeowners to deduct the interest paid on qualifying home loans, reducing their taxable income. Think of it this way: when you're paying down a mortgage, a significant portion of those early monthly payments goes directly toward interest rather than principal. The IRS recognizes this and lets you write off that interest, which can substantially lower your taxable income for the year.

This isn't some obscure tax loophole either. According to the most recent official congressional estimates from the Joint Committee on Taxation, the mortgage interest deduction is expected to reduce federal tax revenues by $261.1 billion between FY2025 and FY2029. That's how significant this deduction is in the tax code.

The 2026 Rules and Limits

Recently, some important changes have made the mortgage interest deduction even more valuable for homeowners. The limit was set to expire at the end of 2025, but the One Big Beautiful Bill Act makes it permanent. So you can stop worrying about whether this deduction will disappear in a few years.

Here's what you need to know about the limits. If you took out your mortgage after December 15, 2017, you can deduct interest on the first $750,000 of debt ($375,000 if married filing separately). This might seem like a low ceiling if you've purchased a home in today's market, but it's actually permanent now, which provides some stability for tax planning purposes.

If your mortgage originated before December 15, 2017, the rules are more generous. For mortgage debt incurred on or before December 15, 2017, the deduction is limited to the interest incurred on the first $1 million ($500,000 for married filing separately) of combined mortgage debt. The key word here is "combined" – if you have a primary residence and a second home, both loans count toward your limit combined.

What Qualifies for the Deduction?

Not all mortgage debt qualifies, so let me clarify what does and doesn't work. A taxpayer may claim an itemized deduction for "qualified residence interest," which includes interest paid on a mortgage secured by either a principal residence or a second residence.

Here's where people often get confused. Interest on a home equity loan or home equity line of credit (HELOC) is deductible only if you used the money to buy, build, or substantially improve the home that secures the loan. If you took out a HELOC to consolidate credit card debt or pay for a vacation, that interest doesn't qualify. The IRS has been clear about this since 2017.

There's some good news on this front though. Private Mortgage Insurance (PMI) will be treated as deductible mortgage interest beginning in 2026. If you're one of the many people paying PMI because your down payment was less than 20%, you can now deduct that as part of your mortgage interest. This is a real benefit for people in Salem and throughout New Hampshire who are getting into the market with smaller down payments.

You Need to Itemize to Benefit

Here's an important catch: This deduction is available only if you itemize your deductions. You can't just claim it alongside the standard deduction. For many people, this is the deciding factor on whether the mortgage interest deduction actually saves them money.

The standard deduction for 2026 is $15,000 (single) / $30,000 (married), so itemizing only benefits those with significant deductions. But here's the thing – with recent changes, more homeowners qualify for itemization now than they did in years past. The SALT deduction cap will increase to $40,000 for tax years 2025-2029. If you live in a state like New Hampshire with property taxes, this higher SALT cap combined with mortgage interest can easily push you over the standard deduction threshold.

I've worked with Salem homeowners who were surprised to discover that when they combined their mortgage interest, property taxes, and other itemizable deductions, they suddenly benefited far more from itemizing than taking the standard deduction. It's worth having that conversation with a tax professional.

Real Numbers Matter

Let me give you a concrete example. Say you're a couple who bought a home in Salem for $350,000 with a 6% interest rate on a 30-year mortgage. In your first year, you'd pay roughly $20,000 in mortgage interest (the vast majority of your payment goes to interest early in the loan). Add in New Hampshire property taxes and a modest amount of charitable contributions, and you could easily surpass the $30,000 standard deduction, making itemization worthwhile.

Before you build your tax strategy around this deduction, ask your lender how much of your payment goes to interest versus principal. Ask for an amortization schedule if you don't already have one. It maps out exactly how your interest payments change year by year, and it gives you a real picture of what your deduction could look like over the life of the loan.

How Homeownership Advantages Compare to Renting

This is where I get really enthusiastic about homeownership, because the advantages go beyond just tax deductions. When you rent, your monthly payments go to your landlord, building no equity for yourself. In contrast, buying a home allows you to build equity with each mortgage payment, as part of your payment goes toward reducing the principal balance of your loan.

Unlike renting, where your payments offer no return, owning a home allows you to benefit from property value increases. And the mortgage interest deduction is just one of several financial advantages that homeownership provides. The tax benefits of homeownership, from mortgage interest deductions to property tax write-offs, may reduce your yearly income tax bill significantly. That's money back in your pocket to invest, save, or put toward your next home improvement project.

A fixed-rate mortgage is one of the most powerful personal finance tools available. When you buy with a 30-year fixed mortgage, your principal and interest payment is the same in year one as it is in year twenty-nine. Renters don't have that protection. Their landlords can raise the rent whenever they choose.

Taking Action in Salem

If you're considering buying a home in Salem, New Hampshire, understanding the mortgage interest deduction is just one piece of the puzzle. But it's an important one. The combination of building equity, benefiting from property appreciation, and reducing your tax burden through deductions makes homeownership a compelling financial decision for the right person.

My advice is to work with a qualified tax professional to calculate whether itemizing makes sense for your specific situation. Everyone's circumstances are different, and what works for one person may not work for another. But don't leave this deduction on the table if you qualify.

If you're ready to explore homeownership in the Salem area, or if you want to discuss how buying a home fits into your overall financial picture, I'd love to help. You can search available properties in our market on HOUSEJET and reach out to me with questions about neighborhoods, market conditions, or anything related to finding your next home.

The mortgage interest deduction is one of many ways that homeownership rewards you financially. Combined with equity building, stable housing costs, and potential property appreciation, it adds up to a pretty compelling case for why owning a home is often better than renting – at least from a financial perspective.