The tax implications of owning a second home turn almost entirely on one question: how you use the property. The IRS sorts second homes into personal residences, rental properties, or mixed-use properties, and that classification decides which deductions you get, whether your rental income is even taxable, and how much of your profit the government keeps when you sell.
How the IRS Classifies Your Second Home
Section 280A of the tax code sets the dividing line. A property counts as a “residence” if you use it personally for more than 14 days during the year, or more than 10 percent of the days it’s rented at fair market rate, whichever is greater.1Office of the Law Revision Counsel. 26 U.S. Code 280A – Disallowance of Certain Expenses in Connection With Business Use of Home, Rental of Vacation Homes, Etc. Fall below both thresholds and the property is treated as a rental or investment property, which unlocks different deductions but attaches different limits.
“Personal use” is broader than most owners think. Any day used by you, a family member, or anyone with an ownership interest counts. So does any day rented to someone below fair market rent. If your cousin stays a week for free, all seven days go in the personal column. A home-swap counts as personal use of both properties.2Office of the Law Revision Counsel. 26 U.S. Code 280A – Disallowance of Certain Expenses in Connection With Business Use of Home, Rental of Vacation Homes, Etc. – Section: Use as Residence
One exception: days spent doing substantially full-time repair or maintenance don’t count as personal use, even if family members tag along.3Office of the Law Revision Counsel. 26 U.S. Code 280A – Disallowance of Certain Expenses in Connection With Business Use of Home, Rental of Vacation Homes, Etc. – Section: Personal Use of Unit An hour of yard work followed by an afternoon at the beach won’t qualify.
Deductions When It’s Used as a Personal Residence
If your second home qualifies as a personal residence, mortgage interest is deductible on the same terms as your primary home. Combined mortgage debt across both properties is capped at $750,000 for interest deduction purposes, or $375,000 if married filing separately. The cap, originally set by the Tax Cuts and Jobs Act, was extended by the One, Big, Beautiful Bill Act signed in 2025. If your total debt exceeds the cap, only interest on the portion within the limit is deductible.
Property taxes are deductible too, but they fall under the state and local tax (SALT) cap. For 2026, that cap is $40,400 for most filers, phasing down above $505,000 in modified adjusted gross income. The figure rises one percent annually through 2029, then resets to $10,000 in 2030. Both deductions require itemizing on Schedule A instead of taking the standard deduction.4Internal Revenue Service. About Schedule A (Form 1040), Itemized Deductions For 2026, the standard deduction is $32,200 for married joint filers, $16,100 for singles, and $24,150 for heads of household.5Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026, Including Amendments From the One Big Beautiful Bill If your itemized deductions don’t clear those numbers, the mortgage interest and property taxes on the second home deliver no direct benefit.
Points Are Deducted Slowly
Points paid on a primary residence loan can often be deducted in full the year you pay them. On a second home, points must be spread ratably over the life of the loan.6Internal Revenue Service. Home Mortgage Points On a 30-year mortgage, that’s one-thirtieth per year. If you sell or refinance early, any unamortized points can be deducted in the year of payoff.
Rental-Allocated Property Tax Escapes the SALT Cap
If you rent the home part of the year, property taxes allocated to rental use go on Schedule E as a business expense, not on Schedule A. That rental share isn’t subject to the SALT cap at all. Only the personal-use portion counts. The IRS has confirmed this treatment in the interplay between the SALT limit and Section 280A’s allocation rules.7Internal Revenue Service. Internal Revenue Service Memorandum – Interplay Between the Limitation of Section 164(b)(6) and Section 280A(b)
Rent It 14 Days or Fewer and Owe Nothing
If you rent the second home for 14 days or fewer during the year, you don’t report any of that income. Sometimes called the Augusta Rule, this provision lets owners keep short-term rental income around peak events tax-free.8Internal Revenue Service. Renting Residential and Vacation Property – Section: Minimal Rental Use There’s no cap on the nightly rate. Charge $5,000 a night during a tournament and the money is still tax-free, so long as the total rental period stays at 14 days or under.
The trade-off is clean. No income to report means no rental expenses to deduct. The 14-day line is hard: renting a fifteenth day means every rental dollar becomes reportable, and a completely different set of rules kicks in.
Mixed-Use Properties
When you personally use the home more than 14 days (or more than 10 percent of rental days) and also rent it more than 14 days, it’s mixed-use. Nearly every expense has to be split between personal and rental use based on the ratio of rental days to total days occupied.9Internal Revenue Service. Renting Residential and Vacation Property Only the rental share goes on Schedule E.10Internal Revenue Service. 2025 Instructions for Schedule E (Form 1040)
The Mandatory Deduction Order
You can’t pick which rental expenses to take first. The tiers must be applied in order, and you move to the next tier only if rental income remains:
- First, the rental share of mortgage interest, property taxes, and casualty losses.
- Second, the rental share of operating costs such as insurance, utilities, and maintenance.
- Third, depreciation on the rental-use portion of the building.11Internal Revenue Service. Publication 527 – Residential Rental Property – Section: Personal Use of Rental Property
Depreciation sits at the bottom, so it’s the deduction most often squeezed out. Residential rental property depreciates over 27.5 years under MACRS, or roughly 3.6 percent of depreciable value per year.
Losses Are Trapped
If rental expenses exceed rental income on a mixed-use property, the excess loss cannot offset wages or investment income. It carries forward, deductible only against future rental income from the same property.11Internal Revenue Service. Publication 527 – Residential Rental Property – Section: Personal Use of Rental Property Every additional personal-use day shrinks the rental allocation and makes it harder for deductions to cover the income. Keep a detailed log of who occupied the property on each day of the year.
Pure Rental Property and the $25,000 Allowance
When the property falls below the residence thresholds and is treated as a rental, losses are generally passive and can only offset passive income. There’s an exception for smaller landlords. If you actively participate in decisions like approving tenants, setting rent, and authorizing repairs, and you own at least 10 percent of the property, you can deduct up to $25,000 in rental losses against ordinary income each year.12Office of the Law Revision Counsel. 26 U.S. Code 469 – Passive Activity Losses and Credits Limited – Section: $25,000 Offset for Rental Real Estate Activities
That allowance phases out once modified AGI exceeds $100,000, dropping by one dollar for every two dollars of income above the line. At $150,000 in modified AGI, it’s gone entirely. Taxpayers who qualify as real estate professionals face no passive loss cap, but the qualifying threshold — over 750 hours per year in real estate and more than half of total working hours devoted to it — is out of reach for most people with other full-time jobs.
The 3.8 Percent Net Investment Income Tax
Higher-income owners face an extra 3.8 percent tax on net investment income, which includes rental income and capital gains on the sale of a second home. It applies when modified AGI exceeds $250,000 for married joint filers, $200,000 for singles, or $125,000 for married filing separately.13Internal Revenue Service. Topic No. 559, Net Investment Income Tax The tax hits whichever is smaller: total net investment income, or the amount by which modified AGI exceeds the threshold. These thresholds are set by statute and not indexed for inflation, so more taxpayers cross them each year.
The surtax stacks on top of regular income tax and capital gains tax. When you sell a second home at a gain while earning above the threshold, the 3.8 percent pushes the top long-term capital gains rate from 20 percent to 23.8 percent. It doesn’t appear on the standard capital gains tables, which is why sellers often miss it.
Capital Gains When You Sell
A primary residence lets you exclude up to $250,000 of profit from tax, or $500,000 for married couples filing jointly, if you lived there at least two of the five years before sale.14Office of the Law Revision Counsel. 26 U.S. Code 121 – Exclusion of Gain From Sale of Principal Residence A second home that was never your primary residence gets none of that. The full profit is subject to long-term capital gains tax at 0, 15, or 20 percent depending on your taxable income.15Internal Revenue Service. Topic No. 409, Capital Gains and Losses For 2026, the 20 percent rate starts at $545,500 for single filers and $613,700 for married joint filers.5Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026, Including Amendments From the One Big Beautiful Bill
Taxable gain is sale price minus cost basis. Basis starts at your purchase price and rises with capital improvements such as a new roof, an added room, or a remodeled kitchen. Routine maintenance and repairs don’t count. If you rented the property and claimed depreciation, your basis is reduced by the depreciation taken, which can substantially raise the gain you owe tax on.
Depreciation Recapture
The depreciation portion of your gain is taxed at up to 25 percent, higher than the standard long-term capital gains rate most sellers pay.16Internal Revenue Service. Property (Basis, Sale of Home, Etc.) 5 Recapture applies to depreciation you actually claimed and to depreciation you were allowed to claim but didn’t. Skipping the annual deduction doesn’t save you at sale; it costs you twice.
Moving Into the Second Home Before Selling
Some owners move into the second home to try to claim the primary residence exclusion on sale. It can work partially, but a nonqualified-use rule limits the benefit. The share of gain attributable to periods when the home was not your primary residence stays taxable. The formula divides total nonqualified-use time by total ownership time, and that fraction of the gain remains outside the exclusion.17Office of the Law Revision Counsel. 26 USC 121 – Exclusion of Gain From Sale of Principal Residence – Section: Exclusion of Gain Allocated to Nonqualified Use
A few carve-outs help. Time after you stop using the home as your primary residence doesn’t count as nonqualified use, protecting sellers who move out shortly before closing. Temporary absences up to two years for job changes or health reasons are excluded. Any nonqualified use before January 1, 2009 is disregarded entirely. Even so, eight years as a vacation home followed by two as a primary residence usually leaves a substantial share of the profit taxable.
1031 Exchange to Defer Tax
If the property was held primarily as a rental or investment, you may be able to defer capital gains and depreciation recapture by rolling the proceeds into another investment property through a like-kind exchange.18Office of the Law Revision Counsel. 26 U.S. Code 1031 – Exchange of Real Property Held for Productive Use or Investment Deadlines are strict: 45 days from the sale to identify potential replacement properties in writing, and 180 days to close, or by your return due date if earlier.19Internal Revenue Service. Like-Kind Exchanges Under IRC Section 1031
A property used primarily for personal vacations doesn’t qualify. The IRS states that a second home or vacation home used primarily for personal purposes is ineligible.20Internal Revenue Service. Like-Kind Exchanges Under IRC Section 1031 – Section: What Property Qualifies for a Like-Kind Exchange The distinction between an investment property you occasionally visit and a vacation home you occasionally rent matters here. Reporting rental income, treating the activity as a business, and limiting personal use strengthens an investment-intent argument. Deducting mortgage interest on Schedule A as a residence weakens it.