Real Estate Taxes: A Guide for Buyers, Sellers & Investors

Real estate transactions are multifaceted and influenced by various financial factors, and one crucial aspect is taxation. Taxes shape the decisions of buyers, sellers, and investors at every stage — from the recurring property tax bill that follows ownership for the life of the property, to the one-time capital gains hit when the property changes hands, to the ongoing deductions that make owning more affordable than the headline price suggests. This guide covers what every buyer, seller, and investor should understand before they sign anything.

Property Taxes

Property taxes are recurring levies imposed by local governments to fund essential public services, such as schools, infrastructure, and public safety. These taxes are typically assessed annually and can significantly impact the affordability of real estate for both buyers and sellers.

• Impact on Buyers: Property taxes play a pivotal role in determining the overall cost of homeownership. Potential buyers must consider not only the purchase price but also the ongoing tax burden. In regions with high property tax rates, homes may become less affordable, and buyers may need to adjust their budget accordingly. Many lenders also escrow property taxes into the monthly mortgage payment, which means a high local tax rate increases the monthly payment well beyond the loan principal and interest.
• Impact on Sellers: Property taxes can affect a property's resale value. If the property taxes in a particular area are significantly higher than in neighboring regions, it might make a property less attractive to potential buyers. Sellers should be aware of the local property tax rates when setting their asking price, and should be prepared for buyers to factor the tax bill into their offer.
• Property Tax Assessments and Appeals: The property tax bill is calculated by multiplying the assessed value of the property by the local tax rate. If you believe the assessed value is too high — for example, because comparable sales in your area suggest a lower market value — most jurisdictions allow you to file an appeal within a specific window after the assessment is issued. A successful appeal can lower the tax bill not just for one year but for years going forward.

Capital Gains Tax

Capital gains tax is a federal tax imposed on the profit made from the sale of a property or other investment. In the context of real estate, capital gains tax can be a substantial consideration, particularly for property investors and for homeowners who have seen significant appreciation.

• The Section 121 Home Sale Exclusion: When a primary residence is sold, Section 121 of the Internal Revenue Code allows a homeowner to exclude up to $250,000 of capital gains if they have lived in the property for at least two of the last five years. However, when looking at the married filing jointly vs separately rules, couples filing a joint return can exclude up to $500,000 if they meet the residency requirements. This is one of the most valuable tax breaks in the entire code and is the reason most homeowners owe nothing on a typical home sale.
• Short-Term vs. Long-Term Gains: Property held for one year or less is taxed at ordinary income rates on any gain above the exclusion. Property held longer than one year is taxed at long-term capital gains rates — generally 0%, 15%, or 20% depending on income — plus a 3.8% net investment income tax (NIIT) for higher earners. Holding period matters: selling at one year and a day instead of 364 days can dramatically change the bill.
• Impact on Investors: Real estate investors don't qualify for the Section 121 exclusion on rental or investment properties. The entire gain — purchase price minus sale price, adjusted for capital improvements and depreciation — is taxable. Investors should plan their transactions strategically, considering holding periods, 1031 exchanges (covered below), and offsetting losses elsewhere in their portfolio to minimize their capital gains tax liability.
• Step-Up in Basis at Death: Real estate inherited by heirs receives a step-up in basis to the fair market value at the date of the original owner's death. This means decades of appreciation can pass to heirs without ever being taxed as a capital gain — a powerful estate planning consideration for owners of long-held properties.

1031 Like-Kind Exchanges

A 1031 exchange — named after Section 1031 of the Internal Revenue Code — lets investors defer capital gains tax when they sell an investment property by reinvesting the proceeds into another like-kind investment property. Used carefully, this can defer tax indefinitely, and combined with the step-up in basis at death, it can eliminate the capital gains liability entirely.

• Strict Timing Rules: The replacement property must be formally identified within 45 days of the sale, and the entire exchange must close within 180 days. Miss either deadline and the exchange fails, triggering the full tax bill.
• Qualified Intermediary Required: Sale proceeds must be held by an independent qualified intermediary. If the seller takes possession of the cash at any point, the exchange is disqualified.
• Real Property Only: Since the Tax Cuts and Jobs Act, only real estate qualifies for 1031 treatment. Equipment, personal property, and other assets no longer qualify.
• Primary Residences Excluded: The home you live in is not eligible. 1031 is strictly for investment and business-use property.

Depreciation for Rental Property Owners

Owners of income-producing real estate can deduct the cost of the building (but not the land) over time through depreciation. Residential rental property is depreciated over 27.5 years, commercial property over 39 years, both using the straight-line method.

On a $400,000 residential rental with $80,000 allocated to land, the annual depreciation deduction is roughly $11,636 ($320,000 ÷ 27.5). For many small landlords, this deduction alone is enough to make the rental show a paper loss for tax purposes, even when cash flow is positive.

The catch is depreciation recapture. When the property sells, the IRS recaptures the depreciation taken over the years, taxing it at up to 25% — separately from the capital gain on the appreciation. A 1031 exchange can defer this recapture along with the underlying capital gain, which is why many career investors never sell outright and instead roll from property to property over decades.

Tax Benefits for Homeowners

Governments often provide tax incentives to encourage homeownership and support the real estate market. The most important ones for homeowners who itemize:

• Mortgage Interest Deduction: Homeowners who itemize can deduct interest on up to $750,000 of acquisition debt ($375,000 if married filing separately) for mortgages originated after December 15, 2017. Older mortgages are grandfathered at the previous $1 million cap. The $750,000 limit was made permanent by the One Big Beautiful Bill Act of 2025. The cap applies to combined balances across a primary home and one second home — not per property.
• Property Tax Deduction (SALT): State and local taxes — including property taxes — can be deducted, subject to the SALT cap. After being limited to $10,000 from 2018 through 2024 under the Tax Cuts and Jobs Act, the cap was raised to $40,000 in 2025 and $40,400 in 2026 under the One Big Beautiful Bill Act, with 1% annual increases through 2029 before reverting to $10,000 in 2030. A phaseout begins at modified adjusted gross income of $505,000 in 2026. This change makes itemizing dramatically more attractive for homeowners in high-tax states, including Massachusetts.
• Private Mortgage Insurance (PMI) Deduction: Beginning in 2026, PMI premiums on qualifying acquisition debt are deductible as mortgage interest, with phaseouts starting at adjusted gross income of $100,000 (joint filers) or $50,000 (married filing separately). This was previously expired and was restored by the OBBBA.
• First-Time Homebuyer Programs: Many states and some federal programs provide tax credits, down payment assistance, or other incentives for first-time homebuyers. Massachusetts offers programs through MassHousing and the One Mortgage program, among others.
• Capital Gains Exclusion on Sale: As covered above, Section 121 lets primary-residence homeowners exclude $250,000 ($500,000 joint) of gain on sale — a benefit that compounds the value of long-term homeownership.

Massachusetts-Specific Considerations

For Boston-area homeowners and investors, several Massachusetts and Boston-specific rules layer on top of the federal picture:

• Residential Exemption: Boston, Cambridge, Somerville, Brookline, and several other Massachusetts municipalities offer a residential exemption that reduces the taxable value of owner-occupied primary residences. The savings can run into the thousands of dollars per year. Eligibility requires the property to be the owner's principal residence as of January 1 of the tax year, and the owner must file an application with the city — it is not applied automatically.
• Massachusetts Income Tax on Capital Gains: Massachusetts taxes long-term capital gains at the standard 5% state income tax rate. Short-term capital gains are taxed at a higher 8.5% rate. The state-level tax stacks on top of federal capital gains tax.
• Millionaire's Tax: An additional 4% surtax applies to Massachusetts taxable income above $1 million, including capital gains from real estate sales. A high-appreciation home sale can push a seller into surtax territory in a single transaction year, so timing and use of installment sales should be considered.
• Estate Tax: Massachusetts levies its own estate tax with a $2 million exemption — far lower than the federal exemption. For long-time Boston-area homeowners whose properties have appreciated significantly, real estate alone can trigger Massachusetts estate tax even when no federal estate tax applies.

Minimizing Your Tax Liability on Real Estate Transactions

• Plan ahead: If you are planning to buy or sell real estate, start planning well before the transaction. This gives you time to consult with a tax professional, structure the transaction efficiently, and time the sale to your tax advantage.
• Keep good records: Keep detailed records of the purchase price, closing costs, capital improvements, and depreciation taken. These directly affect your taxable gain when you eventually sell, and the IRS will require documentation if your return is examined.
• Consider the tax implications of different transaction types: Different transaction types have very different tax consequences. The sale of a primary residence, the sale of a rental property, the exchange of one investment property for another, and the inheritance of property are all taxed differently. Understand the implications before you commit.
• Itemize vs. standard deduction: With the SALT cap raised to $40,400 in 2026 and the mortgage interest deduction made permanent, itemizing has become worthwhile for many more homeowners than under the prior $10,000 SALT cap. Run the numbers both ways for the relevant tax year.

Frequently Asked Questions

How much capital gains tax will I owe when I sell my house?

If the home was your primary residence for at least two of the five years before the sale, Section 121 of the Internal Revenue Code lets you exclude up to $250,000 of gain ($500,000 for married couples filing jointly) from federal capital gains tax. Gains above that exclusion are taxed at long-term capital gains rates if you held the property more than one year — generally 0%, 15%, or 20% depending on your income — plus the 3.8% net investment income tax for higher earners. Investment properties don't qualify for the Section 121 exclusion, so the entire gain is taxable. State capital gains tax may apply on top of federal.

What is the SALT cap and how does it affect homeowners in 2026?

The state and local tax (SALT) deduction lets itemizers deduct state income tax, local income tax, and property tax from federal taxable income. The Tax Cuts and Jobs Act capped this at $10,000 starting in 2018. The One Big Beautiful Bill Act of 2025 raised the cap to $40,000 for 2025 and $40,400 for 2026, with 1% annual increases through 2029, then a reversion to $10,000 in 2030 unless Congress acts. A phaseout begins at modified adjusted gross income of $505,000 in 2026, reducing the cap by 30 cents per dollar of MAGI above the threshold. The marriage penalty remains — single filers and married joint filers share the same cap, while married filing separately is half.

What is a 1031 exchange and who should use one?

A 1031 exchange, named after Section 1031 of the Internal Revenue Code, lets real estate investors defer capital gains tax when selling an investment property by reinvesting the proceeds into another like-kind investment property. Strict rules apply: the replacement property must be identified within 45 days of the sale, the exchange must close within 180 days, and a qualified intermediary must hold the proceeds throughout. Since the Tax Cuts and Jobs Act, 1031 exchanges apply only to real property — personal property no longer qualifies. Primary residences also don't qualify. Used correctly, a 1031 exchange can defer tax indefinitely, with the basis stepping up to fair market value at the owner's death.

How does depreciation work for rental property owners?

The IRS lets rental property owners deduct the cost of the building (not the land) over time through depreciation. Residential rental property is depreciated over 27.5 years and commercial property over 39 years, using the straight-line method. On a $400,000 residential building with $80,000 allocated to land, the annual depreciation deduction is roughly $11,636 ($320,000 ÷ 27.5). Depreciation reduces taxable rental income but also reduces the property's basis, which means a larger taxable gain when you eventually sell — known as depreciation recapture, taxed at up to 25%. A 1031 exchange can defer this recapture along with the underlying capital gain.

What is the mortgage interest deduction limit in 2026?

For mortgages originated after December 15, 2017, homeowners who itemize can deduct interest on up to $750,000 of acquisition debt ($375,000 if married filing separately). Mortgages taken out on or before December 15, 2017 are grandfathered at the older $1 million cap. The $750,000 limit was made permanent by the One Big Beautiful Bill Act of 2025. The cap applies to combined balances across your primary home and one second home. Beginning in 2026, private mortgage insurance premiums are also deductible as mortgage interest, with phaseouts beginning at adjusted gross income of $100,000 (joint) or $50,000 (married filing separately).

Does Massachusetts have a residential property tax exemption?

Yes — Massachusetts allows cities and towns to offer a residential exemption that reduces the taxable value of owner-occupied primary residences. Boston, Cambridge, Somerville, Brookline, and several other municipalities have adopted it. The exemption shifts a portion of the property tax burden onto non-owner-occupied properties and second homes. To qualify in Boston, the home must be the owner's principal residence as of January 1 of the tax year, and the owner must file an application with the city. The savings can be substantial — often several thousand dollars per year — so any Boston-area homeowner who hasn't applied should check eligibility immediately.

Homes for rent: Homes for rent in Massachusetts

Homes for sale: Homes for sale in Massachusetts