RE Tax Calc Real Estate Tax Calc

NNN Lease Tax Deductions for Tenants: What You Pay Is What You Deduct

By RE Tax Calc Editorial · Published November 8, 2026

Under a triple net lease, the tenant's rent obligation includes base rent plus property taxes, insurance, and maintenance costs — and all of it is deductible as an ordinary business expense.

Illustration for NNN Lease Tax Deductions for Tenants
Quick Answer: A NNN (triple net) tenant deducts base rent plus all three "nets" — property taxes, building insurance, and maintenance/CAM charges — as ordinary business expenses under IRC §162. Leasehold improvements the tenant pays for are capitalized as QIP (15-year MACRS) and separately depreciated by the tenant, not the landlord. The building itself is never depreciated by a tenant.
IRS Rule: IRC §162 All ordinary and necessary expenses paid or incurred in carrying on a trade or business are deductible, including rent, property taxes paid as a lease obligation, and other occupancy costs. A NNN tenant's total occupancy cost — base rent plus the three nets — is deductible as a business expense in the year it is paid (cash-basis) or accrued (accrual-basis), subject to the capitalization rules for leasehold improvements and certain prepaid amounts.

Worked example: a retail NNN tenant, Year 1 through Year 3

A regional restaurant chain signs a 15-year NNN lease on a freestanding 3,500 sq ft pad site. Lease terms (Year 1):

Total annual occupancy cost: $144,000. The tenant also spends $480,000 building out the interior in Year 1 (commercial kitchen, partition walls, flooring, lighting, hood system) — all placed in service in October 2026.

Year 1 deductions under IRC §162 (ordinary occupancy expenses):

Year 1 leasehold improvement depreciation on $480,000 QIP build-out:

Total Year 1 tax deductions: $144,000 + $108,800 = $252,800

At a 21% corporate tax rate, that is $53,088 in tax savings in Year 1 alone. At 37% (individual pass-through), the savings reach $93,536.

In Years 2–15 (after the bonus), the tenant deducts $144,000 of occupancy costs (with modest annual rent escalations) plus $25,600/year of regular MACRS depreciation on the remaining QIP basis ($384,000 ÷ 15 years). Total annual deductions: approximately $169,600, declining slightly as the lease matures.

Base rent: fully deductible as a §162 business expense

Base rent under an arm's-length NNN lease is a deductible ordinary and necessary business expense under IRC §162. The deduction timing follows the taxpayer's accounting method:

Cash-basis tenants deduct rent in the year the payment is made. This is straightforward for monthly rent payments, but creates a limitation for prepaid rent: if a cash-basis tenant pays rent covering a period extending beyond 12 months from the payment date, only the portion applying to the current year is deductible — the rest is prepaid rent, carried as an asset and deducted in future years as it accrues.

Accrual-basis tenants deduct rent as it accrues over the lease term — typically ratably by month — regardless of when cash is paid. Stepped rents (leases where the contractual rent increases over time) are generally deducted in accordance with the lease terms, not leveled or averaged. Rent-free periods at the beginning of a lease are more complex: some practitioners argue the rent-free period is an incentive that should be amortized over the lease term; others deduct zero rent in the rent-free period and the stated rent in later periods. IRS guidance under Rev. Rul. 60-122 and later developments favor accruing the economic substance of the full lease obligation ratably.

IRS Rule: Related-Party Leases If a tenant leases from a related party — a business owner leasing from their own LLC, or affiliated entities — the rent must be at fair market rates to be fully deductible. Above-market rents between related parties can be recharacterized. Under the self-rental rule (Reg. §1.469-2(f)(6)), net rental income from a property leased to a business in which the landlord materially participates is recharacterized as non-passive income — a planning point relevant when both landlord and tenant are owned by the same investor.

The three "nets": deducting property taxes, insurance, and maintenance

Under a true NNN lease, the tenant pays three categories of occupancy costs beyond base rent — and all three are deductible under IRC §162 when incurred in a trade or business:

Property taxes (Net 1): Real estate taxes paid directly by the tenant to the taxing authority as required by the lease are deductible as a business expense. The landlord reports neither the payment nor a deduction. If instead the tenant reimburses the landlord who then pays the tax bill, the net result is the same (a deductible occupancy cost for the tenant), but the tenant's return shows the payment as part of rent/occupancy rather than a separate property tax line. Document the lease and payment mechanics clearly — the deduction is the same either way, but the character (rent vs. taxes) can differ.

Insurance (Net 2): Building insurance premiums paid by the tenant are deductible as an ordinary business expense in the year paid (cash basis) or as coverage applies (accrual basis). Premiums covering future periods are prepaid expenses; for accrual-basis taxpayers, only the amount allocable to the current year is deductible unless the 12-month rule applies (amounts providing benefits for 12 months or fewer starting within the same tax year may be deducted immediately).

Maintenance and CAM (Net 3): Routine maintenance, repairs, and common area maintenance charges are deductible as ordinary business expenses. The critical distinction is between deductible repairs (keeping the property in its current operating condition) and capital improvements (betterments, restorations, or adaptations) that must be capitalized and depreciated. Under the tangible property regulations (Reg. §1.263(a)-3), routine maintenance safe harbors and de minimis safe harbors may allow immediate expensing of items that would otherwise need to be capitalized.

Leasehold improvements: tenant depreciation, not landlord

The most important tax point for a NNN tenant who customizes the space is this: the tenant — not the landlord — depreciates the leasehold improvements the tenant pays for, even though the building belongs to the landlord.

Under IRC §168 and the QIP rules (§168(e)(6)), leasehold improvements placed in service after 2017 are qualified improvement property (QIP): 15-year MACRS, eligible for bonus depreciation. The tenant has a full cost basis in improvements it funds, regardless of whether those improvements permanently become part of the building.

The landlord, by contrast, depreciates only the building shell — the 39-year nonresidential real property it owns. If the landlord paid for tenant improvements (a TIA — tenant improvement allowance), the landlord depreciates those. If the tenant paid, the tenant depreciates. The lease structure is NNN regardless of who funded the build-out.

When the lease ends and improvements revert to the landlord, the tenant stops depreciating at that point. Any remaining undepreciated basis in tenant-funded improvements that revert to the landlord is an ordinary abandonment loss under IRC §168(i)(1) — deductible on Form 4797 in the year of departure. This can be a significant deduction on a long-lived build-out where the tenant leaves before the 15-year MACRS period expires.

Planning Tip2026 is the last year for any bonus depreciation under current law (20%). A NNN tenant that completes a leasehold build-out by December 31, 2026 captures a 20% first-year write-off; the same build-out placed in service on January 1, 2027 receives zero bonus and recovers only 3.33% (half-year convention on 15-year property) in year one. For large build-outs — $400,000 or more — this timing difference is worth over $65,000 in first-year deductions.

Tenant improvement allowances: income and basis

Even under a NNN lease, the landlord may provide a tenant improvement allowance (TIA) — a cash payment or landlord-funded build-out credit — to attract a creditworthy tenant. The TIA is treated differently from the base rent structure:

IRC §110 exclusion: If the TIA is paid for improvements to nonresidential real property, the improvements revert to the landlord at lease end, and the lease term (including renewal options) is 15 years or less, the tenant may exclude the TIA from gross income under IRC §110. The tradeoff: the tenant has zero basis in the improvements and cannot depreciate them. The landlord depreciates instead.

Outside the §110 exclusion: When the lease term exceeds 15 years (common in NNN leases, which routinely run 10–20 years with options), the §110 exclusion does not apply. The tenant includes the entire TIA in ordinary income and takes a full cost basis in the improvements it constructs. The tenant then depreciates those improvements as QIP over 15 years with any available bonus depreciation. This is the common scenario for a long-term NNN tenant who receives a TIA.

Subletting and sublease income

If a NNN tenant subleases part or all of its space to a subtenant, the sublease rent is ordinary income to the master tenant (the original NNN lessee). The master tenant continues to deduct its own rent obligations to the landlord (base rent plus nets), plus any costs of the sublease. The net sublease income or loss is ordinary and may be treated as a trade or business item or a rental item depending on the nature of the master tenant's activities.

The subtenant stepping into a NNN arrangement faces the same analysis as the original NNN tenant — base rent plus any pass-through nets are deductible business expenses. If the master tenant charges the subtenant more than the master tenant pays (a "sandwich lease" position), the spread is ordinary income to the master tenant.

Lease termination costs: paying to exit or being paid to leave

Tenant pays to exit early: A lease termination payment made by the tenant to the landlord to exit a lease early is generally a deductible ordinary business expense under IRC §162. Because the right to terminate is a valuable economic benefit, some practitioners argue the payment must be amortized over the original remaining lease term — but the prevailing view, confirmed by IRS rulings, is that a true exit payment (eliminating the obligation entirely) is deductible in the year paid. The tenant also stops depreciating the leasehold improvements and claims an abandonment loss on any remaining basis.

Landlord pays the tenant to vacate: If the landlord pays the tenant to exit — common when the landlord wants to redevelop — the payment is ordinary income to the tenant. The tenant offsets this income with any abandonment loss on undepreciated leasehold improvement basis. If the payment exceeds the remaining improvement basis, the excess is ordinary income (or potentially §1231 gain if the tenant has a §1231 position). There is no capital gain treatment on a simple landlord-funded exit payment absent a specific asset sale.

Common MistakeNNN tenants sometimes forget to claim the ordinary abandonment loss on undepreciated leasehold improvements when they vacate. If a tenant leaves with $200,000 of undepreciated QIP basis and the improvements revert to the landlord, that entire $200,000 is an ordinary deduction on Form 4797 in the year of departure — deductible against ordinary income, potentially at the top rate. Missing it is a costly error that cannot be corrected in a later year without an amended return.

State and local tax considerations

Property taxes in a NNN lease are a significant item and their deductibility at the state level may differ from the federal treatment. Most states conform to IRC §162 for business occupancy costs, so the tenant deducts NNN payments federally and at the state level. However, the state where the property is located may impose commercial rent taxes (Florida charges a sales tax on commercial rent), gross-receipts-based levies, or other charges that add to the occupancy cost. These state charges are themselves deductible as business expenses for federal purposes.

An out-of-state tenant occupying a NNN property may create nexus (a tax presence) in the property's state, which can require the tenant to apportion income there and file a nonresident business return. For a small single-location tenant, the nexus issue is usually straightforward — the rent expense is local to the property state. For a multistate tenant that owns dozens of NNN locations, state apportionment of income interacts with the deductibility of rent across jurisdictions in ways that require careful modeling.

Frequently asked questions

Can a NNN tenant deduct property taxes paid directly to the county?

Yes. Property taxes paid directly by the tenant as required under a NNN lease are deductible as an ordinary business expense under IRC §162. The landlord reports neither the payment nor a deduction on its own return. If the tenant reimburses the landlord who then pays the county, the net deductibility is identical.

Who depreciates leasehold improvements in a NNN lease?

The tenant depreciates any improvements it pays for, even though the building belongs to the landlord. The building (the 39-year shell) is depreciated by the landlord only. When the lease ends and improvements revert to the landlord, the tenant claims an ordinary abandonment loss equal to any remaining undepreciated improvement basis on Form 4797.

Is base rent under a NNN lease fully deductible?

Yes. Base rent paid under an arm's-length NNN lease is a deductible ordinary and necessary business expense under IRC §162. Cash-basis taxpayers deduct it when paid; accrual-basis taxpayers deduct it as it accrues. Prepaid rent covering periods beyond 12 months from the payment date may need to be deferred.

How is a lease termination payment treated for a NNN tenant?

A payment the tenant makes to exit a lease early is generally a deductible ordinary business expense in the year paid. If the landlord pays the tenant to vacate, the payment is ordinary income to the tenant, offset by any abandonment loss on undepreciated leasehold improvement basis.

Can a NNN tenant deduct prepaid rent?

Only the portion that applies to the current tax year. Cash-basis taxpayers generally cannot deduct prepaid rent covering periods beyond 12 months from the payment date. Accrual-basis taxpayers deduct rent as it accrues over the lease term. Upfront lease premiums (key money) are amortized over the lease term, not deducted immediately.

Educational information and estimates only. Not tax advice. Tax rules change and vary by situation; consult a qualified tax professional before acting.

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