QBI and triple net leases: why they usually don't qualify

By Tom, CPA · Updated October 27, 2026

Part of: Rental Property Taxes

TL;DR: A triple net (NNN) lease shifts taxes, insurance and maintenance to the tenant, which leaves the landlord with little activity. NNN leases are excluded from the 250-hour QBI safe harbor, and a single NNN property usually fails the section 162 trade-or-business test. Exceptions: self-rentals to a commonly controlled business, and larger NNN portfolios with real, regular management activity.

Educational only, not tax, legal, or investment advice. Examples are illustrations, not predictions. Rules and limits change; verify current figures and talk to a qualified professional about your situation.

Your tenant pays the mortgage; the IRS pays for the roof (eventually, over 27.5 years). In a triple net lease, the tenant also pays for the roof, plus the property taxes and the insurance. It is the closest thing real estate has to mailbox money, and that is exactly why the 20% qualified business income deduction under section 199A usually does not reach it.

Section 199A applies to income from a qualified trade or business. A landlord whose tenant handles almost everything has a hard time showing a trade or business. This page explains why, where the exceptions are, and how to think about it with real numbers. If you have not read it yet, start with the QBI safe harbor for rentals.

CPA Warning Label: Collecting a check while the tenant fixes the roof is a lovely life. It is also the IRS working definition of not running a business.

What NNN means

"Net" refers to which property costs the tenant pays on top of base rent:

Rev. Proc. 2019-38 defines a triple net lease for its purposes as a lease agreement requiring the tenant or lessee to pay taxes, fees and insurance and to be responsible for maintenance activities for a property, in addition to rent and utilities. It also covers a lease under which the tenant pays a portion of those costs in proportion to the rented space.

Common NNN properties: a single-tenant pharmacy, a fast-food pad site, a dollar store, or a medical office leased to the practice that owns the building. Market labels vary. The tax analysis looks at the actual lease terms, not the broker flyer.

Safe harbor exclusion

The rental real estate safe harbor in Rev. Proc. 2019-38 is unavailable for property leased under a triple net lease. So the easy path, separate books plus 250 hours of rental services plus contemporaneous logs, is closed.

Two clarifications that people miss:

• Excluded from the safe harbor is not excluded from 199A. The revenue procedure says a rental that does not meet the safe harbor may still be treated as a trade or business if it otherwise meets the section 162 standard.
• Mixed portfolios. If an investor owns a gross-lease apartment complex and one NNN retail pad, only the NNN property is excluded. The apartment enterprise can still use the safe harbor if it meets the requirements on its own, and NNN property cannot be added to the enterprise to count toward hours.

The IRS reasoning, explained in the preamble to the final regulations, is that a triple net lessor typically performs too few services to have a trade or business, so a bright-line safe harbor would be too generous for them.

162 trade-or-business facts

Without the safe harbor, a NNN landlord must show the rental rises to a trade or business under section 162. The Treasury regulations do not provide a checklist, but the factors courts and the preamble point to include:

• Type of property and number of properties. One NNN building looks like an investment. Ten NNN buildings with active lease renewals, tenant improvements and rolling acquisitions can look more like a business.
• Owner or agent day-to-day involvement. Are you negotiating renewals, managing common-area maintenance reconciliations, handling tenant defaults, overseeing roof and structural work you remain responsible for?
• Type of lease. Absolute net leases with long terms and corporate guarantees are weakest. NNN leases where the landlord still handles roof, structure and parking lot are stronger.
• Ancillary services provided by the landlord.
• Continuity and regularity. Sporadic activity does not count; ongoing management does.

Treat this as a documentation exercise. If you are taking the position that a NNN portfolio is a trade or business, keep the same type of time logs and management records you would keep for the safe harbor, even though the safe harbor itself is unavailable. Also note consistency: taking the position that a NNN rental is a trade or business for 199A can affect other filings, such as issuing Forms 1099 to contractors.

Self-rental rule

The big exception is self-rental. Under Treas. Reg. 1.199A-1(b)(14), the rental or licensing of property to a commonly controlled trade or business is treated as a trade or business for section 199A, if the rental is to a trade or business conducted by an individual or a relevant pass-through entity (partnership or S corporation). Common control generally means the same person or group owns 50% or more of both, directly or indirectly, under the aggregation rules in Treas. Reg. 1.199A-4(b)(1)(i).

So the classic setup, a dentist who owns the building in an LLC and leases it NNN to their own S corporation practice, can qualify the rent for 199A even though the lease is triple net. Two caveats:

• Rental to a C corporation does not get this treatment, because the C corporation is not a relevant pass-through entity.
• SSTB taint. If the tenant is a specified service trade or business (health, law, accounting and similar fields) under common control, the regulations treat the rental to that SSTB as part of the SSTB, which matters only for taxpayers above the income threshold.

More on the passive loss and NIIT side of this setup in self-rental rules.

Examples

Illustration 1: the single pad site. Larry owns one fast-food building leased under a 20-year absolute net lease. Assumptions: net rent $96,000, depreciation $38,000, other costs $2,000 for bookkeeping and the annual entity fee, married filing jointly with taxable income of $300,000 before QBI. Larry's activity is reading the rent deposit notification. Facts point to an investment, not a trade or business, so most practitioners would not claim QBI here. Potential deduction lost: 20% of $56,000 = $11,200. At a 24% marginal rate that is roughly $2,688 of tax.

Illustration 2: the commonly controlled tenant. Fran owns 100% of an LLC that owns a building leased NNN to her S corporation consulting firm (not an SSTB). Assumptions: rent $60,000, depreciation $15,000, interest and other costs $10,000, Fran's taxable income $180,000 (below the 2026 threshold of $201,750 single, per Rev. Proc. 2025-32). Net rental income $35,000 is treated as from a trade or business under the self-rental rule. QBI deduction: 20% of $35,000 = $7,000. At 24%, about $1,680 of tax saved.

Illustration 3: the NNN portfolio. An investor owns 14 NNN retail properties, hires an asset manager, negotiates renewals and tenant improvements yearly, and handles roof replacements. That fact pattern has a credible trade-or-business argument. It is also exactly the kind of position to document with time and activity records and discuss with a tax professional before filing.

Is it worth fighting for?

The QBI deduction on rental income is real money, but NNN investors often have other options. Rental real estate income is not subject to self-employment tax either way, the net investment income tax still applies for passive owners above the thresholds, and the decision to treat a rental as a trade or business does not change depreciation. Compare the tax at stake against the documentation burden. See also lease options and the net investment income tax guide.