An investment LLC’s tax deductions cover most of what it spends to operate: mortgage interest and property taxes on rental real estate, insurance, repairs, professional fees, depreciation, retirement plan contributions, and a share of home office and vehicle costs. The catch sits at the front of the analysis. Your LLC has to be running a trade or business, not simply holding investments, because expenses tied to passive investment management are no longer deductible for individual owners at all. Once you clear that threshold, the deductions available to your LLC look much like those available to any other pass-through business, with a few real-estate-specific rules layered on top.
Trade or Business Is the Threshold Question
This is the single distinction that decides whether your LLC gets deductions at all. Expenses connected to a trade or business are deductible under IRC Section 162, which covers the “ordinary and necessary” costs of an active operation.1Office of the Law Revision Counsel. 26 U.S. Code 162 – Trade or Business Expenses Before 2018, expenses for producing investment income were separately deductible under Section 212 as miscellaneous itemized deductions. The Tax Cuts and Jobs Act suspended those Section 212 deductions, and the One Big Beautiful Bill Act made the suspension permanent.
What that means in practice: an LLC that operates rental properties, flips houses, or runs an active trading strategy can deduct its operating costs. An LLC that parks money in index funds and pays an advisor a management fee has no path to deduct that fee at the individual level. Everything below assumes your LLC’s activity qualifies as a trade or business.
One other structural point matters. Most investment LLCs are taxed as disregarded entities (single member) or partnerships (multi-member), so deductions calculated at the LLC level flow through to owners on Schedule C, Schedule E, or a Schedule K-1.2Internal Revenue Service. About Schedule E (Form 1040), Supplemental Income and Loss3Internal Revenue Service. About Form 1065, U.S. Return of Partnership Income The LLC itself does not pay tax on the income the deductions offset.
Everyday Operating Expenses
Operating deductions cover the routine costs of keeping the LLC functioning. To qualify, an expense must be both ordinary (common in your line of investing) and necessary (helpful and appropriate for the business).
- Legal and accounting fees, including attorney work on contracts and operating agreement amendments, plus CPA fees for tax preparation and bookkeeping.
- State filing and registration costs, such as annual report fees, franchise taxes, and registered agent fees. These typically run from $50 to several hundred dollars per year depending on the state.
- Management fees paid to third-party property managers or asset advisors, as long as the compensation is reasonable for the services provided.
- Banking costs, including account maintenance fees and wire transfer charges tied to the LLC’s operating accounts.
- Research and data services, such as subscriptions to investment research platforms, market data terminals, or industry publications used in managing the LLC’s assets.
- Travel expenses for inspecting properties, meeting tenants, or attending to LLC business, subject to IRS substantiation rules requiring documentation of business purpose, destination, and amounts spent.
Vehicle expenses for business driving can be deducted using either the standard mileage rate or actual costs (gas, insurance, maintenance, depreciation). For 2026, the IRS set the standard business mileage rate at 72.5 cents per mile.4Internal Revenue Service. IRS Sets 2026 Business Standard Mileage Rate at 72.5 Cents Per Mile Pick one method in the first year and keep consistent records.
Home Office
If you manage the LLC’s business from a dedicated space in your home, you can deduct a portion of your housing costs. The space must be used regularly and exclusively for business. The simplified method allows $5 per square foot up to 300 square feet, capped at $1,500 per year.5Internal Revenue Service. FAQs – Simplified Method for Home Office Deduction The regular method allocates actual expenses (mortgage interest, utilities, insurance, repairs) by the business-use percentage of your home. It often produces a larger deduction but demands more recordkeeping.
Health Insurance Premiums
Self-employed LLC members can deduct health, dental, and vision insurance premiums for themselves, their spouse, and dependents. This one is taken on Form 1040 rather than at the LLC level, and it reduces adjusted gross income directly. The plan must be established under the business, and you cannot claim the deduction for any month you were eligible for employer-subsidized coverage through a spouse’s job or another source.6Internal Revenue Service. Instructions for Form 7206
Real Estate Deductions
For LLCs holding rental properties, property-level expenses produce the largest write-offs. These flow through Schedule E and reduce the rental income that reaches owners’ returns.
Mortgage interest on debt used to acquire or improve investment property is generally fully deductible. There is no cap on how much investment-property mortgage interest you can write off, unlike the personal home mortgage interest deduction. Property taxes assessed by local authorities are deductible in the year paid, and the $10,000 SALT cap that limits personal property tax deductions does not apply to taxes on investment real estate.
Insurance premiums for hazard coverage, liability policies, landlord insurance, and flood insurance are all deductible as necessary costs of protecting the asset. Utilities paid by the LLC, such as water, electric, and gas for common areas or between tenants, are deductible operating costs.
Repair costs that maintain the property in its existing condition are immediately deductible. Fixing a leaky faucet, patching drywall, or replacing a broken appliance are current-year deductions. Improvements that add value, extend useful life, or adapt the property to a new use must be capitalized instead. The line between the two is one of the most frequently audited areas in real estate taxation. A working rule: if it restores the property to its current condition, it’s a repair; if it makes the property better, longer-lasting, or suitable for a new purpose, it’s an improvement.
Depreciation and Cost Recovery
Depreciation is often the single largest deduction for a real estate investment LLC. It lets you recover the cost of the building structure over time as a non-cash expense, reducing taxable income without spending a dollar in the current year.
The IRS requires straight-line depreciation for rental buildings. Residential rental property is depreciated over 27.5 years, commercial property over 39 years.7Office of the Law Revision Counsel. 26 U.S. Code 168 – Accelerated Cost Recovery System Only the building structure depreciates; land never does, because it doesn’t wear out. When you purchase a property, you must allocate the purchase price between land and building based on fair market value, and only the building portion enters the depreciation calculation.
Bonus Depreciation
The One Big Beautiful Bill Act restored 100% bonus depreciation for qualified property on a permanent basis.8Internal Revenue Service. Treasury, IRS Issue Guidance on the Additional First Year Depreciation Deduction Amended as Part of the One Big Beautiful Bill This applies to tangible personal property and certain improvements, not to the residential or commercial building structures themselves. For investment LLCs, bonus depreciation is most valuable when paired with a cost segregation study.
Cost Segregation
A cost segregation study reclassifies components of a building into shorter recovery periods. Flooring, cabinetry, specialized electrical systems, landscaping, and parking lot surfaces can be pulled out of the long recovery schedule and assigned to 5-year, 7-year, or 15-year categories. With bonus depreciation back at 100%, those reclassified components can be written off entirely in the first year. On a $1 million rental property, a cost segregation study might shift $200,000 to $350,000 of components into accelerated categories, producing a large first-year deduction that would otherwise trickle in over decades.
Section 179 and the De Minimis Safe Harbor
Section 179 lets an LLC immediately expense the full cost of qualifying tangible personal property placed in service during the year, instead of depreciating it over time. For 2026, the maximum Section 179 deduction is approximately $2.56 million, with a phase-out that begins when total qualifying property purchases exceed roughly $4 million. Section 179 applies to items like equipment, appliances, and certain improvements, not to residential rental building structures. The property has to be used in an active trade or business, and the deduction is capped at the LLC’s net taxable income from that business.
For smaller purchases, the de minimis safe harbor is easier. Under Treasury Regulation 1.263(a)-1(f), an LLC without audited financial statements can immediately deduct tangible property costing $2,500 or less per item or invoice. LLCs with audited financial statements can use a $5,000 threshold. That handles inexpensive items like a $400 microwave for a rental unit or a $1,200 set of window blinds without capitalization and depreciation. The election is made annually by attaching a statement to the LLC’s tax return.
What Has to Be Capitalized
Some expenditures can’t be deducted in the year paid. Costs that add value, extend useful life, or adapt property to a new use must be capitalized: added to the asset’s basis and recovered through depreciation over time, or credited against taxable gain when you sell.
Common capital expenditures include a full roof replacement, adding a new HVAC system, building an addition, or gutting and remodeling a kitchen. Acquisition costs also get capitalized. When you buy real estate, closing costs like title insurance, survey fees, and broker commissions get added to the property’s basis rather than deducted in the year of purchase.
Start-Up and Organizational Costs
Initial formation expenses have their own rules. The LLC can elect to deduct up to $5,000 of organizational costs (filing fees, legal expenses for drafting the operating agreement) and up to $5,000 of start-up costs (pre-opening advertising, market research) in the first year of operations.9Office of the Law Revision Counsel. 26 U.S. Code 195 – Start-Up Expenditures Each $5,000 allowance phases out dollar for dollar when the respective category of expenses exceeds $50,000, disappearing entirely at $55,000. Anything above the first-year deduction is amortized ratably over 180 months.
The 20% Qualified Business Income Deduction
Section 199A lets owners of pass-through entities deduct up to 20% of their qualified business income from the LLC.10Internal Revenue Service. Qualified Business Income Deduction Originally set to expire after 2025, the deduction was made permanent by the One Big Beautiful Bill Act, which also raised the phase-in threshold and added a minimum deduction of $400 for any taxpayer with qualified business income.
For rental real estate LLCs, the threshold question is whether the rental activity qualifies as a “trade or business.” The IRS finalized a safe harbor treating rental real estate as qualifying if the LLC performs at least 250 hours of rental services per year and maintains separate books and contemporaneous time logs documenting those services.11Internal Revenue Service. IRS Finalizes Safe Harbor to Allow Rental Real Estate to Qualify as a Business for Qualified Business Income Deduction Rental services include property maintenance, tenant management, rent collection, and similar hands-on work. For LLCs operating less than four years, the 250-hour requirement applies each year; for longer-standing operations, you have to meet it in at least three of the prior five years.
The deduction is taken on the owner’s personal return, not at the LLC level, but it effectively reduces the tax burden on LLC income by up to 20%. On an LLC generating $200,000 in net rental income, that can mean a $40,000 deduction that costs nothing to implement beyond meeting the safe harbor requirements.
Whether You Can Actually Use a Loss
Calculating deductions at the LLC level is only half of it. Whether an owner can use a resulting loss depends on the passive activity rules under IRC Section 469. Losses from passive activities can only offset income from other passive activities, not wages, salaries, or portfolio income.12Office of the Law Revision Counsel. 26 USC 469 – Passive Activity Losses and Credits Limited Losses you can’t use in the current year carry forward until you generate passive income or sell the entire interest in the activity.
Rental real estate is automatically classified as passive regardless of hours spent, with two important exceptions.
The $25,000 Rental Loss Allowance
Taxpayers who actively participate in managing their rentals can deduct up to $25,000 of rental losses against non-passive income like wages. Active participation is a lower bar than material participation: making management decisions, approving tenants, and setting rental terms generally qualifies. The $25,000 allowance phases out by $1 for every $2 of adjusted gross income above $100,000, disappearing entirely at $150,000. For higher-income LLC owners, this allowance often provides no benefit at all.
Real Estate Professional Status
The most powerful exception to the passive activity rules is qualifying as a real estate professional. You have to meet two tests: spend more than 750 hours during the year in real property businesses where you materially participate, and spend more than half your total working hours in those businesses. Someone with a full-time job outside real estate almost never qualifies, because the “more than half” requirement is nearly impossible to satisfy alongside 2,000+ hours at another job.
When you do qualify, rental losses become fully deductible against all income types. Combined with accelerated depreciation from a cost segregation study, real estate professional status can generate six-figure paper losses that offset W-2 or business income. The IRS scrutinizes these claims closely, so contemporaneous time logs are essential.
Investment Interest Limitation
If the LLC borrows money to purchase investments other than rental real estate, such as margin loans for securities, the interest is classified as investment interest expense. This kind of interest is deductible only up to the amount of net investment income the taxpayer reports for the year.13Office of the Law Revision Counsel. 26 USC 163 – Interest Net investment income includes dividends, non-qualified interest, and short-term capital gains. Excess investment interest carries forward to future years and is treated as paid in the next tax year, so the deduction isn’t lost permanently.
This limitation does not apply to interest on debt used to acquire rental real estate. Mortgage interest on rental properties is deducted as an ordinary rental expense on Schedule E, with no cap tied to investment income.
Retirement Plan Contributions
LLC owners who earn self-employment income from the business can set up retirement plans that create significant above-the-line deductions. The contributions reduce adjusted gross income, which can also help with income-sensitive thresholds like the passive loss allowance phase-out.
A SEP IRA allows contributions of up to 25% of net self-employment earnings, with a maximum of $72,000 for 2026.14Internal Revenue Service. SEP Contribution Limits (Including Grandfathered SARSEPs) A solo 401(k) offers more flexibility for single-owner LLCs, combining an employee deferral of up to $24,500 with an employer profit-sharing contribution of up to 25% of compensation, for the same $72,000 aggregate cap. Owners aged 50 to 59 or 64 and older can add $8,000 in catch-up contributions; those aged 60 to 63 can contribute an additional $11,250.
These deductions only apply to earned income from the LLC’s business operations. Passive rental income generally does not count as self-employment income, so LLC owners whose only activity is collecting rent typically cannot fund retirement plans through the LLC. Short-term rental income with substantial services is the exception.
A Note on Self-Employment Tax
Self-employment tax is not a deduction, but it shapes what LLC owners keep. Members of an LLC taxed as a partnership or disregarded entity pay self-employment tax (12.4% for Social Security on earnings up to $184,500 in 2026, plus 2.9% for Medicare on all earnings) on their share of business profits. An additional 0.9% Medicare surtax applies to earnings above $200,000 for single filers or $250,000 for joint filers. The owner can deduct half of the self-employment tax paid as an above-the-line adjustment on Form 1040.
Rental real estate income is generally exempt from self-employment tax regardless of the LLC structure. This exemption is one reason rental properties are tax-favored compared to other business income. Short-term rentals averaging seven days or fewer per stay, or 30 days or fewer with substantial personal services, may be reclassified as active business income subject to self-employment tax.