Commercial Lease Improvement Allowance Amortization: Complete Guide (2026)

Q: How does a tenant amortize leasehold improvements under ASC 842?

Under ASC 842 (the current US GAAP lease accounting standard), leasehold improvements are amortized over the shorter of: (1) the useful life of the improvement, or (2) the lease term. The lease term includes the initial term plus any renewal options the tenant is reasonably certain to exercise. For example, if you install $200,000 of improvements with a 10-year useful life but your lease is only 5 years with no renewal option you're likely to exercise, you amortize the full $200,000 over 5 years — $40,000/year. If you receive a $150,000 TI allowance, you capitalize only the $50,000 you funded yourself. The $150,000 from the landlord is treated as a lease incentive and reduces your right-of-use asset, effectively amortizing through lower lease expense over the lease term.

Q: What is landlord amortization of TI allowance and how does it affect rent?

When landlords provide large TI allowances — especially amounts above market — they often 'amortize' the excess into the rent rather than simply giving it. This means the landlord calculates the present value of the TI overage, spreads it across the lease term, and adds the resulting per-year/per-SF cost to your base rent. For example, if market TI is $50/SF but you negotiate $80/SF, the landlord amortizes the extra $30/SF at their cost of capital (say 8%) over a 10-year term. That adds roughly $4.47/SF/year to your annual rent — making the 'free' $30/SF extra TI actually cost you $44.70/SF in additional rent over the lease. Always model the true cost of above-market TI allowances.

Q: Are tenant improvements tax-deductible?

Yes, but the treatment depends on who funded the improvement. Improvements you fund yourself are capitalized and depreciated (not immediately deducted), typically over 15 years under MACRS as Qualified Improvement Property (QIP) — though bonus depreciation under current law may allow immediate 100% deduction if the rules are still in effect. Improvements funded by a landlord TI allowance you spend on qualifying improvements may also be deducted under Section 110, provided certain conditions are met. The TI allowance itself, when received, is generally not taxable income to the tenant if it is spent on improvements (it creates a basis in the improvement instead). Consult a CPA familiar with commercial real estate for your specific situation.

Q: What happens to unamortized leasehold improvements if I terminate the lease early?

If you terminate the lease before the improvements are fully amortized, you generally write off the remaining net book value as a loss in the year of termination. For example, if you installed $300,000 of improvements with a 10-year amortization schedule and exit in year 4, you've amortized $120,000 and have $180,000 of remaining book value — that $180,000 becomes a loss on disposal (or may be offset by any gains if you receive termination payments or the landlord buys out improvements). This is why lease abandonment decisions must always include the write-off impact on your income statement. The loss may be deductible, but timing and character depend on your tax situation.

Q: How should I negotiate TI allowances to maximize value?

To maximize TI allowance value: (1) Negotiate allowances as a dollar-per-SF figure rather than a fixed cap, so it scales if you expand; (2) Push for 'warm vanilla shell' delivery instead of taking raw space — landlord builds core finishes before TI clock starts; (3) Negotiate broad allowable uses — many TI packages try to restrict spending to 'hard costs only' — push for FF&E, moving costs, and technology infrastructure to be covered; (4) Secure disbursement terms favorable to your cash flow (front-loaded vs. reimbursement basis); (5) If you can negotiate above-market TI, model whether the added rent cost is worth it; (6) Request a TI allowance 'true-up' right if construction costs overrun; (7) Include a provision allowing you to assign TI rights to a subtenant or assignee.

Q: What is a TI allowance loan and when does it make sense?

A TI allowance loan (also called an 'above-standard' TI or 'amortized TI loan') occurs when the landlord agrees to fund improvement costs above the standard TI package, treating the excess as a loan to the tenant repaid through additional rent. The interest rate is typically 8-12% for creditworthy tenants. It makes sense when: (1) You need more build-out than the landlord will fund for free; (2) Your cost of capital is higher than the landlord's amortization rate; (3) You need to preserve cash for operations. Model it carefully — a $100,000 TI loan at 10% over 7 years adds roughly $14,286/year ($1,190/month) to rent. Compare this to taking a bank loan or using operating cash. In general, landlord TI loans are convenient but expensive.

Tenant improvement (TI) allowances are one of the most negotiated — and most misunderstood — elements of a commercial lease. A landlord who says "we'll give you $75 per square foot in TI" sounds generous. But what does that actually mean for your balance sheet, your taxes, your rent, and your exit strategy?

This guide breaks down the full lifecycle of a TI allowance from both the tenant and landlord perspective: how allowances are structured, how they're accounted for under modern lease accounting rules, how landlords amortize above-market TI into rent, the tax treatment, and what happens when you terminate early or sublease.

What Is a Tenant Improvement Allowance?

A tenant improvement allowance (TIA or TI allowance) is money provided by a landlord to fund build-out of leased space. It's the landlord's way of making the space functional for the tenant — recognizing that raw or second-generation space often requires significant construction to meet the tenant's specific needs.

TI allowances are expressed in dollars per rentable square foot ($/RSF). A 10,000 SF office space at $60/SF TI means the landlord is contributing up to $600,000 toward construction. The tenant typically manages construction and is reimbursed by the landlord upon completion (or receives milestone disbursements during construction).

TI allowances are standard across all commercial lease types — office, retail, industrial, medical — but the amounts vary dramatically by market, asset class, and property quality. Class A office in gateway markets often commands $80–$120+/SF, while secondary-market industrial leases may offer $15–$25/SF.

Key Point: A TI allowance is not free money. It affects your rent, your balance sheet, your taxes, and your flexibility. Model the full economic impact before signing.

TI Allowance Structure Types

Not all TI allowances are structured the same way. Understanding the structure determines the economics:

1. Standard Market TI (Landlord-Funded, No Amortization)

The most common structure. The landlord offers a market-rate TI allowance that is baked into the lease economics. The rent includes an implicit return on the TI investment. No separate "loan" — it's just part of the deal. The tenant capitalizes improvements, the landlord expenses the TI funding.

2. Above-Market TI with Rent Amortization

When tenants negotiate TI beyond the market rate, landlords amortize the excess into rent. The landlord calculates the above-market TI, figures out the annual cost of that capital (typically at 8–12%), and adds a per-SF-per-year "TI loan" charge to base rent. This is detailed in the Math Examples section below.

3. Landlord Turn-Key Build-Out

The landlord agrees to deliver space built to a specific plan. No cash changes hands — the landlord just builds and delivers a finished space. The tenant has less control over quality and vendors but avoids construction management risk. From an accounting standpoint, the tenant simply takes possession of a finished space; improvement costs are embedded in the rent.

4. Tenant-Managed Construction with Reimbursement

The tenant hires contractors, manages construction, submits invoices to the landlord for reimbursement up to the TI cap. This gives the tenant maximum control. Disbursement triggers typically include: signed contracts with licensed contractors, periodic draw requests with lien waivers, certificate of substantial completion.

5. TI Loan / Amortized Loan Structure

When a tenant needs more build-out money than the landlord will provide for free, the landlord may offer additional TI as an interest-bearing loan repaid through additional monthly rent. This is common for high-build tenants (medical offices, labs, restaurants) where construction costs far exceed market TI.

Tenant Accounting Under ASC 842

ASC 842 (effective for public companies in 2019, private companies in 2020–2022) overhauled lease accounting and changed how TI allowances are treated on financial statements.

Pre-ASC 842 Treatment (Old Rules)

Under the old standard (ASC 840), TI allowances received from the landlord were recorded as a "deferred rent liability" and amortized into income over the lease term as a reduction to rent expense. Leasehold improvements funded by the tenant were capitalized and amortized.

ASC 842 Treatment (Current Rules)

Under ASC 842, TI allowances paid by the landlord are classified as "lease incentives." These reduce the initial measurement of the right-of-use (ROU) asset. The effect: your ROU asset is lower (reflecting that the landlord funded part of the build-out), and your lease liability is based on the pure rent stream.

Leasehold improvements you fund yourself are treated as separate from the lease — they're property, plant & equipment (PP&E) amortized over the shorter of useful life or lease term (including renewal options reasonably certain to exercise).

ASC 842 TI Accounting Example:

Lease: 10,000 SF office, 7-year term, $35/SF/year base rent
TI allowance received from landlord: $500,000 ($50/SF)
Total construction cost: $650,000 ($65/SF)
Tenant self-funded: $150,000 ($15/SF)
Landlord TI ($500K): Reduces ROU asset at lease inception; amortized through lease expense over 7 years ($71,428/year reduction)
Tenant-funded improvements ($150K): Capitalized as PP&E; amortized over 7 years (useful life = lease term) = $21,428/year depreciation
Net annual impact: Lease expense of ~$350K/year minus $71K TI reduction = ~$279K net, plus $21K depreciation = ~$300K total annual cost of occupancy

Renewal Options and Amortization Period

A critical judgment under ASC 842: if you're "reasonably certain" to exercise a renewal option, you must include that renewal period in both your lease liability and your amortization schedule. This can significantly affect the amortization rate of leasehold improvements. If you have a 5-year initial term with a 5-year renewal you're likely to exercise, you amortize over 10 years — cutting annual amortization in half.

Landlord Amortization of TI Costs

From the landlord's perspective, TI allowances are a capital investment. They must earn a return on that capital through the rent stream. Understanding how landlords think about TI amortization helps you negotiate smarter.

Landlord's TI Return Calculation

Landlords use a simple model: the TI allowance is amortized as if it were a mortgage at a "landlord's cost of capital" — typically 7–12% depending on the market environment and the tenant's credit. The amortized annual TI cost is built into the per-SF base rent.

The formula landlords use to convert TI to annual rent impact:

Annual Rent Add-On ($/SF/year) = TI ($/SF) × [i(1+i)^n] / [(1+i)^n − 1]
Where: i = landlord's periodic rate (annual rate / 12 for monthly), n = lease term in months

For a 10-year lease term, this is equivalent to the mortgage constant for a fully amortizing loan at that rate.

Math Examples: Modeling TI Economics

Example 1: Is Above-Market TI Worth It?

You're negotiating a 10-year, 5,000 SF office lease. The landlord offers two options:

Option A: $40/SF TI, $28/SF/year base rent
Option B: $70/SF TI, $31.50/SF/year base rent

You need $60/SF of improvements. Under Option A, you fund $20/SF yourself. Under Option B, the landlord funds everything.

Option A Total Cost:

Rent: $28 × 5,000 × 10 = $1,400,000
Out-of-pocket TI: $20 × 5,000 = $100,000
Total: $1,500,000

Option B Total Cost:

Rent: $31.50 × 5,000 × 10 = $1,575,000
Out-of-pocket TI: $0
Total: $1,575,000

Option B costs $75,000 more in rent to avoid $100,000 in upfront capital. If cash is tight, Option B may still be worth it — you're essentially borrowing $100,000 at 8% over 10 years ($3.50/SF/year × 5,000 SF = $17,500/year). But if you have cash, Option A is cheaper.

Example 2: TI Loan Payback Calculation

Landlord offers a TI loan for $200,000 at 9% interest amortized over the 7-year lease term.

Monthly Payment = P × [i(1+i)^n] / [(1+i)^n − 1]
= $200,000 × [0.0075 × (1.0075)^84] / [(1.0075)^84 − 1]
= $200,000 × 0.01595
= $3,190/month = $38,280/year = $7.66/SF/year (on 5,000 SF)
Total repaid over 7 years: $267,960 → Total interest cost: $67,960

Example 3: Early Termination Write-Off

You install $400,000 of leasehold improvements, amortized over 8 years. You exit in year 3.

Annual amortization: $400,000 / 8 = $50,000/year
Amortized through year 3: $150,000
Net book value at exit: $250,000 — written off as a loss on disposal
Partial tax benefit: at a 21% corporate tax rate, write-off saves ~$52,500 in taxes
Net economic loss from early exit: $197,500 on improvements alone

Tax Treatment of TI Allowances

The tax treatment of TI allowances is a complex area that intersects lease accounting, depreciation rules, and Section 110 of the Internal Revenue Code.

When TI Allowances Are Not Taxable Income

Under IRC Section 110, a TI allowance received by a lessee is excluded from gross income if: (1) the lessee is a commercial tenant, (2) the lessor provides the allowance to fund qualified improvements (structural components of the building), and (3) the lessee expends the amount on the qualified improvements. This exclusion means the $500,000 TI allowance your landlord gives you typically doesn't create a taxable event — it simply creates a basis in the leasehold improvements.

Qualified Improvement Property (QIP)

Leasehold improvements that constitute "qualified improvement property" under the Tax Cuts and Jobs Act (TCJA) have a 15-year depreciable life under MACRS and may qualify for bonus depreciation (100% in earlier years, currently phasing down). This means a tenant who funds their own improvements may be able to deduct the full cost in year one rather than over 15 years — a significant cash flow advantage. As of 2026, verify current bonus depreciation percentages with your CPA.

TI Tax Treatment Summary
Scenario	Tax Treatment	Key Rule
Landlord TI received, spent on qualifying improvements	Not taxable income; creates basis in improvement	IRC §110
Tenant-funded improvements (QIP)	15-year MACRS; bonus depreciation available	TCJA 2017
TI allowance received but NOT spent on improvements	Taxable income in year received	General income rules
TI loan repayment via rent	Rent deductible; principal not separately deductible	General rent rules
Write-off of unamortized improvements on early exit	Ordinary loss deductible in year of abandonment	IRC §165

Early Termination and Write-Offs

One of the most overlooked financial risks of TI allowances is the write-off exposure when you exit a lease early. Whether through a negotiated termination, sublease, or default, unamortized leasehold improvements can create a significant P&L hit.

Negotiated Termination with Landlord

If you pay a termination fee to exit early, the landlord may — as part of the termination agreement — take ownership of the improvements in lieu of requiring removal. This is favorable for you: you avoid removal costs, and the landlord absorbs the residual value. However, the remaining book value of improvements is still written off on your books.

Sublease Scenarios

If you sublease rather than terminate, the unamortized improvements stay on your books and continue to be amortized. You may be able to negotiate with your subtenant to pay a premium for the improvements (a "key money" or "fixture premium" arrangement), which partially offsets your book value.

Assignment

If you assign your lease to another tenant, the assignee takes over your lease and typically inherits the improvements. Some assignment agreements include a payment from assignee to assignor for the "value" of the improvements, partially recovering the net book value.

TI Structure Comparison Table

TI Structure	Cash Impact	Balance Sheet	Rent Impact	Best For
Standard Market TI	Net positive (less capital outlay)	Reduces ROU asset	Baked into market rent	Most tenants
Above-Market TI w/ Amortization	Neutral upfront; higher rent	Reduces ROU asset more	Increases base rent	Capital-constrained tenants
Turn-Key Build-Out	No construction cash needed	Lower PP&E, higher lease liability	Higher rent vs. TI option	Tenants wanting no construction risk
TI Loan	Funded upfront; repaid in rent	No liability (embedded in lease)	Significant rent increase	High-build-out tenants
Tenant Self-Funded	High upfront capital	PP&E asset, no lease impact	No impact (lower base rent)	Cash-rich tenants seeking lower rent

12-Item TI Allowance Negotiation Checklist

✅ Before You Sign: TI Allowance Checklist

Know your build-out cost before negotiating. Get a contractor's preliminary estimate for your specific space requirements — don't guess. Your negotiating position depends on knowing your actual need.
Benchmark TI allowances for your submarket and asset class. Research what comparable tenants are receiving. A broker's market survey or recent comps are essential. Don't accept the first number.
Define "allowable costs" broadly. Negotiate to include FF&E, technology/data cabling, signage, moving costs, and architectural/engineering fees — not just "hard costs."
Secure favorable disbursement terms. Push for front-loaded draws (milestone-based) rather than reimbursement after completion. Better cash flow during construction.
Confirm the TI is not contingent on opening. Some retail TI packages include an "opening condition" — if you don't open by a certain date, you forfeit TI. Negotiate this out.
Negotiate for TI overage rights. If your construction costs exceed the TI allowance, clarify how overruns are handled — do you have the right to a TI loan for the excess?
Include a "TI assignability" clause. If you sublease or assign, the new tenant should be able to benefit from remaining TI draw rights or improvements.
Understand landlord approval rights. Most leases give landlords approval rights over plans and contractors. Negotiate a reasonable timeline (10–15 business days) and "deemed approval" if the landlord doesn't respond.
Clarify ownership and removal obligations. Who owns the improvements at lease end? Are you required to remove them? Restoration obligations can be costly — negotiate "no removal" for standard improvements.
Model the rent impact of above-market TI. Always calculate total rent + amortized TI cost when comparing deal structures. The highest TI offer isn't always the best economic deal.
Review tax implications with your CPA before closing. Understand IRC §110 exclusion requirements, QIP bonus depreciation availability, and how TI interacts with your overall tax position.
Consider AI-powered lease review to flag non-standard TI provisions. Unusual disbursement conditions, landlord clawback rights, and unfavorable approval timelines are easy to miss in dense lease language.

The Bottom Line: TI Allowances Are More Complex Than They Appear

A generous-sounding TI allowance can be the most valuable component of your lease deal — or it can be a financing mechanism that costs you more than you'd pay if you funded improvements yourself. The key is to model the economics thoroughly, understand the accounting and tax treatment, and negotiate the terms (not just the dollar amount).

Before your next lease negotiation, make sure you understand:

Whether the TI offer is at, above, or below market for your submarket
How above-market TI will affect your base rent via landlord amortization
The ASC 842 impact on your ROU asset and lease expense
Your tax position regarding QIP deductions and IRC §110 exclusions
The write-off exposure if you exit the lease before full amortization

Use LeaseAI to extract and analyze TI allowance provisions automatically from your lease documents, flag non-standard terms, and give your team a clear picture of every economic obligation before you sign. Try the ROI Calculator to see how much time AI-powered lease review saves your team.

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Frequently Asked Questions

How does a tenant amortize leasehold improvements under ASC 842?

Under ASC 842, leasehold improvements funded by the tenant are amortized over the shorter of useful life or the lease term (including any renewal options reasonably certain to be exercised). TI allowances received from the landlord reduce the ROU asset and are recognized through lower lease expense over the lease term. See the detailed examples in this article for specifics.

What is landlord amortization of TI allowance and how does it affect rent?

When landlords provide above-market TI allowances, they amortize the excess cost into the base rent as an annual add-on, typically calculated at their cost of capital (8–12%). This means higher TI = higher rent. Always model the total cost impact, not just the upfront benefit.

Are tenant improvements tax-deductible?

Yes — tenant-funded improvements classified as Qualified Improvement Property (QIP) have a 15-year MACRS life and may qualify for bonus depreciation. TI allowances from landlords spent on qualifying improvements are generally excluded from income under IRC §110. Consult a CPA for your specific situation.

What happens to unamortized leasehold improvements if I terminate the lease early?

The remaining net book value is written off as a loss in the year of early termination. This can be significant — a $300,000 improvement base with 60% remaining when you exit means a $180,000 write-off. This loss is generally tax-deductible under IRC §165.

How should I negotiate TI allowances to maximize value?

Key tactics: broaden the definition of "allowable costs" to include FF&E and tech; negotiate front-loaded disbursement; push for no opening contingencies; secure TI assignability; and always model above-market TI against the resulting rent increase before accepting it.

What is a TI allowance loan and when does it make sense?

A TI loan is funding above the standard allowance that the landlord provides at an interest rate (8–12%), repaid through higher rent. It makes sense when you're capital-constrained or when your own cost of capital exceeds the landlord's rate. Model total repayment cost carefully before agreeing.