Tenant Improvement Allowance Accounting: GAAP Treatment, Amortization, and CAM Implications
A tenant improvement allowance (TIA) is cash a landlord pays toward a tenant's build-out costs. Under ASC 842, the tenant records TIA as a lease incentive that reduces the right-of-use (ROU) asset. For the landlord, TIA is a leasing cost, not an operating expense. Neither treatment puts TIA in the building's CAM pool. When it appears there anyway, often under line items like "capital project amortization" or "building rehabilitation," it is a billable overcharge you can dispute with the same backup documentation the landlord already has on file.
Key Takeaways
- TIA is a lease incentive, not a building operating expense. It belongs on neither party's operating expense ledger.
- Under ASC 842, TIA reduces the tenant's ROU asset, lowering amortization expense across the lease term.
- For federal tax purposes, TIA received by a tenant is generally excluded from gross income under Rev. Proc. 99-48 if specific conditions are met.
- Including TIA in CAM is a lease violation under the exclusion language in most NNN and modified gross leases.
- If TIA costs appear in your CAM reconciliation, the supporting invoices will identify what space the work was done in, which is the documentation you need to dispute it.
What a Tenant Improvement Allowance Is
TIA is not an operating cost. It is a cost the landlord incurs to execute a lease, in the same category as leasing commissions. It benefits only the new or renewing tenant whose space is being built out. That is the foundation of every TIA-in-CAM dispute.
When a landlord wants to attract a tenant, they frequently offer a dollar-per-square-foot allowance to fund the build-out: partitions, flooring, HVAC, electrical, finishes. The landlord fills the space at the agreed rent. The tenant gets a usable workspace without funding the full capital cost up front.
Payment goes one of two ways: the landlord pays the contractor directly, or the landlord reimburses the tenant after the tenant pays and submits receipts.
CAM is supposed to cover the cost of maintaining and operating common areas in a state that benefits all tenants. TIA does neither.
Accounting for TIA Under ASC 842: Tenant Side
Under ASC 842 (effective for public entities in 2019 and private entities in 2022), TIA is classified as a lease incentive. Lease incentives reduce the measurement of the ROU asset at commencement.
The two delivery methods produce slightly different entries but the same economic result.
When the landlord pays the contractor directly, the tenant never handles the funds. The build-out becomes a leasehold improvement, and the lease incentive reduces the initial ROU asset measurement. No cash inflow, no liability.
When the landlord reimburses the tenant, the tenant first records a receivable after paying the contractor. Once the reimbursement arrives, the cash reduces the ROU asset rather than flowing through income. (Standard TIA structures almost never trigger income recognition; the conditions for that are covered in the tax section below.)
Worked example:
Assume:
- Lease term: 10 years
- Present value of lease payments: $2,000,000
- Initial direct costs: $0
- TIA received from landlord: $500,000
Before TIA, the ROU asset is $2,000,000.
After subtracting the lease incentive: ROU asset = $2,000,000 - $500,000 = $1,500,000.
The tenant amortizes the $1,500,000 ROU asset straight-line over 10 years: $150,000 per year rather than $200,000. The TIA lowers annual occupancy cost across the full lease term rather than landing as income in the year it's received.
The lease liability is unaffected. It equals the present value of future lease payments regardless of any incentive received.
One timing note: TIA received before commencement is treated as a prepayment and recognized at commencement as the lease incentive offset. Received after commencement, it still reduces the ROU asset carrying value at that point.
Accounting for TIA on the Landlord's Books
For the landlord, TIA is a cost of executing the lease. Under ASC 842, it is classified as an initial direct cost or a lease incentive payable, depending on whether it is paid before or after commencement.
If the landlord has committed to TIA but hasn't paid out yet, it records a lease incentive payable and a deferred rent adjustment that reduces recognized lease income over the term.
Once paid, the landlord amortizes TIA as a straight-line reduction of rental income across the lease term. A $500,000 TIA on a 10-year lease reduces recognized rental income by $50,000 per year. That is a revenue adjustment, not an operating expense deduction.
Here's what that means for CAM: TIA is capital spending tied to leasing, in the same category as a leasing commission. Leasing commissions are excluded from CAM under standard lease language. TIA follows the same logic, on both economic and accounting grounds.
IRS and Tax Treatment of TIA
The tax treatment of TIA received by a tenant is governed primarily by Rev. Proc. 99-48, 1999-2 C.B. 575.
Rev. Proc. 99-48 excludes TIA from the tenant's gross income when three conditions are satisfied: the landlord pays it to the tenant, the tenant uses it to construct or improve qualified long-term real property at the premises, and the amount is excludable under IRC Section 109. All three must hold.
If all three conditions are met, the tenant does not recognize taxable income on receipt. The cost basis of the improvements is zero in the tenant's hands (a corresponding rule under IRC Section 1019 eliminates depreciable basis for property acquired with excluded TIA funds).
When TIA becomes taxable: The safe harbor can break in two ways. First, if the landlord retains ownership of the improvements and the TIA is structured as a payment for those improvements rather than as a lease incentive, Rev. Proc. 99-48 may not apply. Second, if the tenant has broad discretion to use TIA for purposes beyond qualifying improvements, the IRS may recharacterize the payment as rental income or compensation.
CPAs handling TIA on the tenant side should document:
- The lease provisions governing TIA use
- Evidence that funds were applied to qualifying improvements
- The landlord's title position relative to the improvements after lease expiration
Misclassifying TIA as income creates a tax liability that did not need to exist. Misclassifying it as basis-carrying property produces depreciation deductions the tenant may need to reverse.
For the landlord: TIA is deductible as a business expense over the lease term, not in the year paid, under the tax rules governing capitalized leasing costs. The difference matters in practice: a $500,000 TIA is not a year-one deduction but a 10-year amortization that reduces taxable rental income proportionally.
Why TIA Should Never Appear in CAM
The accounting makes the CAM argument direct. TIA is a cost of attracting a tenant to a specific space. It does not maintain common areas or benefit existing tenants.
Including TIA in CAM means existing tenants pay a proportionate share of a new tenant's build-out. That is not a maintenance cost. It is a subsidy. Standard NNN and modified gross lease language bars it.
The lease language test: Look for a CAM exclusion clause that lists items such as:
- "Leasing commissions"
- "Tenant improvement costs or allowances"
- "Capital expenditures for tenant improvements"
- "Costs to alter or improve space for any tenant"
Any of these formulations covers TIA. If your lease contains one, any TIA in the CAM pool is directly disputable as a lease violation.
Even without specific TIA exclusion language, most leases define CAM as costs to "maintain, repair, and operate" the common areas or the building. A build-out cost for a specific tenant's private space does not fit that definition by any reasonable reading.
How Landlords Fold TI Costs into CAM
TIA never shows up in a CAM reconciliation labeled "Tenant Improvement Allowance." That would be too obvious. What you actually see:
"Building improvements" or "capital project amortization." Landlords sometimes spread capital costs over several years and bill tenants their annual share. If the underlying project was a tenant-specific build-out, that amortized charge has no business in CAM. Line items with "capital amortization" in the description are worth pulling invoices on every time.
"Special projects" or "construction services." General contractor invoices for work that spans both common areas and private tenant space. When the invoice doesn't break down where the work happened, it looks like routine maintenance. It isn't always.
"Renovation" or "building rehabilitation." A single project can include both legitimate common area upgrades and a tenant's private build-out. Some landlords charge the full project to CAM rather than separating the two. The allocation is the dispute.
Management company oversight billed to the property account. If the property manager supervises a TIA project and books those supervision hours to the operating expense account, the labor cost flows into CAM even though the work it covers is a private build-out.
To identify TIA costs, request invoices for every line item related to construction, renovation, improvements, or capital projects. Ask the contractor or property manager what space the work was done in: a project file will name the suite. Cross-reference the invoice dates against known move-in dates for new tenants; TIA work clusters around commencement. And ask the landlord to confirm in writing that no tenant improvement costs are included in the reconciliation for the period under review.
What to Do If TIA Costs Appear in Your CAM
Step 1: Flag the line item. Pull the CAM reconciliation and mark anything related to construction, renovation, improvements, or capital work. Note the dollar amount.
Step 2: Request the invoices. Audit rights clauses in most leases entitle you to backup documentation for any CAM line item. Send a written request naming the specific line items and the reconciliation year.
Step 3: Find out what space the work was in. A general contractor's invoice or project file will reference a suite number, a project description, or a lease. If the work was in another tenant's space, you have what you need.
Step 4: Identify your lease exclusion. Quote the specific clause that excludes tenant improvement costs from CAM. If there is no explicit TIA exclusion, lean on the operative CAM definition ("maintain and operate the common areas") and the fact that you received no benefit from the work.
Step 5: Write the dispute letter. State the line item, the amount, the lease language, and what the invoice shows. Request a credit or a corrected reconciliation. Keep the tone factual. You are citing a contract provision.
CAMAudit's excluded-service and landlord-overhead detection rules catch this pattern in scanned reconciliation documents, including amortized TIA costs buried in capital line items.
Frequently Asked Questions
Is tenant improvement allowance considered income?
Generally, no. Under Rev. Proc. 99-48, TIA received by a tenant is excluded from gross income if the landlord pays it, the tenant uses it for qualifying improvements to the leased premises, and the improvements are used in the tenant's trade or business. If those conditions are satisfied, the tenant does not record income on receipt. The trade-off is that the improvements have zero depreciable basis in the tenant's hands under IRC Section 1019. If the conditions are not met, such as when the tenant has broad discretion to use TIA for non-improvement purposes, the IRS may treat it as taxable rental income.
How is a tenant improvement allowance recorded under ASC 842?
Under ASC 842, TIA is a lease incentive that reduces the right-of-use (ROU) asset at lease commencement. If the landlord commits $500,000 in TIA against a $2,000,000 ROU asset, the tenant records the ROU asset at $1,500,000 and amortizes it over the lease term. The lease liability is unaffected. The practical effect is lower amortization expense each year compared to what the tenant would recognize without the TIA.
Can a landlord include tenant improvement costs in CAM charges?
No. TIA is a cost the landlord incurs to attract a specific tenant. It does not maintain or operate common areas and provides no benefit to existing tenants. Including TIA in CAM shifts the cost of one tenant's build-out to all other tenants in the building. Most NNN and modified gross leases explicitly exclude tenant improvement costs and leasing commissions from CAM. Even without explicit TIA exclusion language, TIA does not fit within the standard CAM definition of costs to maintain and operate common areas.
How is TIA amortized for accounting purposes?
For the tenant under ASC 842, TIA reduces the ROU asset and flows through as a lower amortization charge over the lease term rather than appearing as a separate amortization line. For the landlord, TIA is amortized as a reduction of rental income on a straight-line basis over the lease term. For income tax purposes, TIA paid by a landlord is a capitalized leasing cost deducted ratably over the lease term, not in the year paid.
What happens to TIA when a lease is terminated early?
Early termination creates accounting and tax consequences for both parties. For the tenant: the unamortized ROU asset (net of the TIA reduction) is derecognized, and any gain or loss is recognized on the termination date. If a termination fee is paid, it may partially offset the loss. For the landlord: the unamortized lease incentive (TIA) is accelerated. The remaining deferred TIA balance may be recognized as income or a loss depending on the specifics of the termination arrangement. Lease agreements often address TIA recapture: if the tenant terminates before a specified date, the tenant may owe the landlord a prorated portion of the TIA. CPAs should review the lease's early termination and TIA recapture provisions before closing out the lease on the books.
Related Resources
Understanding CAM exclusions:
- CAM exclusions in commercial leases : Full list of standard and negotiated CAM exclusions
- Management fee overcharges in CAM : How management costs get improperly charged to tenants
- Excluded service charges in CAM statements : Services the lease specifically excludes from CAM
Lease cost accounting:
- Capital expenditures in CAM charges : The distinction that determines what landlords can charge
- CAM reconciliation process explained : How annual reconciliations work and where errors concentrate
Tools:
- CAM Overcharge Estimator : Estimate your potential overcharge before requesting records