Capital expenditures in commercial leases—full roof replacements, new HVAC systems, elevator installations, parking lot rebuilds—get allocated between landlord and tenant according to the lease language, not any default rule of fairness. In a gross lease the landlord absorbs most of it. In an absolute triple net lease the tenant can be responsible for nearly all of it, including structural work. Everything in between is a matter of what the lease says, which is why the negotiation before signing matters more than any argument afterward.1Office of the Law Revision Counsel. 26 USC 263 – Capital Expenditures
Repair or Capital Expenditure
The first question is whether a given cost is even a capital item. Patching a section of roof is a repair. Replacing the entire roofing membrane is a capital expenditure. Fixing a leaky pipe is maintenance; replacing the building’s plumbing mains is a capital project. The distinction matters because repairs can be deducted immediately as operating expenses, while capital expenditures must be spread over the asset’s useful life.
Federal regulations capitalize a cost if it produces a betterment, a restoration, or an adaptation of the property—fixing a pre-existing defect, materially increasing capacity, replacing a major component, or converting the property to a fundamentally different use.2eCFR. 26 CFR 1.263(a)-3 – Amounts Paid to Improve Tangible Property Installing a high-efficiency HVAC unit to replace an older system is a betterment. Rebuilding a deteriorated parking structure is a restoration.
For smaller items, the IRS de minimis safe harbor lets businesses expense purchases below a threshold instead of capitalizing them: up to $5,000 per invoice for taxpayers with audited financial statements, up to $2,500 per invoice for those without.3Internal Revenue Service. Tangible Property Final Regulations Watch for landlords passing through items just above those thresholds as “capital” when they look more like ordinary maintenance.
How Your Lease Type Decides Who Pays
In a full-service or gross lease, the landlord folds most capital costs into the base rent. The tenant pays a higher monthly amount but gets predictability. If the boiler fails, that’s the landlord’s problem. The landlord prices the risk into the rent and effectively self-insures across the building’s tenant base.
Triple net leases flip the equation. The tenant takes on property taxes, insurance, and maintenance on top of base rent. In an absolute triple net arrangement, tenants may be responsible for virtually all capital expenditures, including structural items such as roofing and HVAC replacement. Modified versions, sometimes called double net leases, carve out structural elements (roof, foundation, parking lot) and keep those with the landlord. The gap between absolute and modified net can amount to hundreds of thousands of dollars over a ten-year term, and the labels vary enough across markets that the actual pass-through language matters more than what the lease is called.
Most commercial leases sit somewhere in between. A modified gross lease might include base-year operating expenses in the rent and pass through capital expenditures only above a stated threshold. The letter of intent stage, before a formal lease is drafted, is the best time to set these boundaries. Once the LOI is signed, both sides treat it as the commercial framework and shifting major cost allocations gets much harder.
Amortization: The Formula That Protects You
Even when a tenant is responsible for a capital cost, no reasonable lease requires the full amount upfront. The cost gets amortized over the improvement’s useful life, and the tenant pays only their share for the years they occupy. This is the single most important protection in a capital-heavy lease.
Here’s how it works. A $100,000 roof replacement with a 20-year useful life produces an annual amortized cost of $5,000 before interest. The landlord adds an interest rate to cover the financing carry. A reasonable rate tracks the landlord’s actual borrowing cost, typically prime plus a modest spread. Leases that peg the rate to the landlord’s “desired rate of return” rather than their actual cost of capital can push the rate to 10% or higher. Insist on a defined benchmark, such as prime plus two points, so the amortization schedule doesn’t turn into a profit center.
If a tenant has five years left when the $100,000 project is completed, they pay five years of amortized cost, not twenty. The remaining balance stays with the landlord to recover from future tenants or absorb as a cost of ownership. Lease language should state this explicitly. Without it, a landlord can argue for front-loading costs during the current tenant’s occupancy.
Verification matters. Confirm the actual project cost, the useful life assigned to the improvement, and the interest calculation applied to the amortized balance. Landlords who self-perform work or use affiliated contractors sometimes inflate project costs, which inflates the amortization base passed through to every tenant in the building.
Caps, Exclusions, and Audit Rights
Several layers of protection can be built into the lease before any dispute arises.
An annual cap on capital pass-throughs limits the total a landlord can charge in any given year, often expressed as dollars per square foot. It doesn’t eliminate the obligation; it prevents a single catastrophic year from breaking the tenant’s budget. Caps work best paired with an amortization requirement, so the landlord can’t compress a large project into one year’s charges.
Exclusions carve out categories the tenant refuses to fund. The most common and defensible are:
- Pre-existing conditions: defects or deferred maintenance that existed before the lease started. A tenant who inherits a building with a failing roof should not pay for the replacement the landlord postponed for years.
- Landlord negligence: damage caused by the landlord’s failure to perform routine maintenance. If a boiler fails because annual servicing was skipped, that cost belongs to the landlord.
- Equity-building improvements: upgrades that primarily increase resale value or attract future tenants, such as lobby renovations, facade upgrades, and amenity additions, without benefiting the current tenant’s operations.
These need to be spelled out. Without explicit language, the default allocation depends on the lease type and jurisdiction, and the results rarely favor the tenant.
Audit Rights
An audit clause lets the tenant review the landlord’s books and verify that pass-throughs match actual costs. Without it, the tenant is trusting the landlord’s accounting entirely. A workable clause specifies the review window (commonly 90 to 180 days after the annual reconciliation), identifies the records available for inspection (general ledger entries, contractor invoices, insurance documents, tax payments), and requires the landlord to keep those records for a stated period. Some leases require the landlord to reimburse audit costs if the review turns up overcharges above a threshold, usually 3% to 5%. Building the review into the payment process, before an invoice is paid, tends to produce better cooperation than disputing charges afterward.
Code and ADA Compliance Costs
Government-mandated upgrades produce some of the most contentious capital disputes in commercial leasing. When a city updates its fire safety code or a federal accessibility requirement changes, both sides have plausible arguments for shifting the cost.
Where the lease is silent, the general principle allocates cost based on who triggered the obligation. If a code change applies to the building as a whole (stairwell fire doors, common-area emergency lighting), the landlord typically bears the cost, because the obligation flows from ownership. If the tenant’s specific business triggers the requirement (commercial exhaust ventilation for a restaurant, specialized waste handling for a medical office), the tenant pays, because the obligation wouldn’t exist without that particular use.
Watch for broad “compliance with laws” clauses in landlord-drafted leases. They can shift the entire burden of building-wide code compliance onto the tenant, including issues that predate the lease. A tenant-friendly counter requires the landlord to warrant that the building complies with applicable codes at the time of possession, limits the tenant’s compliance obligations to their own rented space, and requires any additional responsibilities to be listed specifically rather than swept in by open-ended language.
ADA Accessibility
The Americans with Disabilities Act places barrier-removal obligations on both landlord and tenant. A lease can allocate who performs and pays for the work, but it cannot eliminate either party’s legal liability. If a disabled person is denied access, both the property owner and the operating business can face enforcement action.4Office of the Law Revision Counsel. 42 USC 12182 – Prohibition of Discrimination by Public Accommodations
For existing buildings, the ADA requires barrier removal when doing so is “readily achievable,” meaning without significant difficulty or expense. Businesses must re-evaluate accessibility annually, because removal that was too expensive last year can become feasible as the business grows.5ADA.gov. ADA Readily Achievable Barrier Removal Checklist for Existing Facilities Factors include the facility’s size, the business’s financial resources, and the nature and cost of the improvement.
In negotiation, push for the landlord to warrant ADA compliance in common areas (elevators, lobbies, parking lots, shared restrooms) and to keep common-area compliance costs out of pass-through operating charges. The tenant remains responsible for accessibility inside their own space (aisle widths, counter heights, signage) but shouldn’t be funding building-wide accessibility projects.
Tax Recovery When You Fund Improvements
A tenant who pays for their own leasehold improvements has several federal tax tools to recover the cost faster than the building’s 39-year depreciation schedule would allow.
Qualified Improvement Property
Interior improvements to an existing nonresidential building generally qualify as qualified improvement property and depreciate over 15 years rather than 39.6Internal Revenue Service. Publication 946 – How to Depreciate Property The improvement must be made after the building was first placed in service. Building enlargements, elevators, escalators, and the internal structural framework don’t qualify. Everything from new lighting and flooring to reconfigured office layouts falls into the 15-year category.
Section 179 Expensing
Section 179 lets a business deduct the full cost of qualifying property in the year it’s placed in service, up to an annual limit that adjusts for inflation.1Office of the Law Revision Counsel. 26 USC 263 – Capital Expenditures QIP is eligible, so a tenant who spends $200,000 on an interior buildout could potentially deduct the full amount in year one instead of spreading it over 15 years. The deduction phases out once total qualifying property placed in service exceeds a higher statutory threshold, so businesses making very large investments in a single year should model the math carefully.
Disabled Access Credit and Barrier Removal Deduction
Two federal tax benefits offset ADA compliance costs, and they can be used together in the same year. The disabled access credit provides eligible small businesses (gross receipts of $1 million or less, or no more than 30 full-time employees) a credit equal to 50% of access expenditures between $250 and $10,250, for a maximum credit of $5,000 per year.7Office of the Law Revision Counsel. 26 USC 44 – Disabled Access Credit
Separately, businesses of any size can deduct up to $15,000 per year in expenses for removing architectural and transportation barriers, covering costs that would ordinarily need to be capitalized.8Internal Revenue Service. Tax Benefits to Help Offset the Cost of Making Businesses Accessible to People with Disabilities A small business that spends $20,000 on ADA improvements could claim the $5,000 credit on the first $10,250 and deduct up to $15,000 of the remainder, sharply reducing the net cost.
Protecting Yourself Before You Sign
Most capital expenditure disputes are decided before the lease is executed. Two pre-signing steps carry outsized weight.
Property Condition Assessment
A property condition assessment performed by an independent engineering firm gives the tenant a baseline inventory of every major system (roof, HVAC, electrical, plumbing, structural elements, site paving) with estimated remaining useful life and projected replacement costs. This is especially important for triple net tenants, who can be on the hook for system failures that were predictable before they moved in. A PCA typically runs between a few thousand dollars and $15,000 depending on building size, small compared to the six-figure capital calls it can help avoid. The assessment also gives the tenant documentation for negotiating pre-existing condition exclusions, because it shows what was already failing at the time of lease execution.
SNDA and Estoppel
A subordination, non-disturbance, and attornment agreement protects the tenant if the building’s lender forecloses on the landlord. Without one, a foreclosure can wipe out the lease entirely. Standard lender-friendly SNDA language often states that a successor landlord has no responsibility for construction, alterations, or improvement allowances promised by the prior owner. Negotiate for the successor to honor ongoing obligations, particularly capital commitments already in progress, and insist on “continuing default” language that holds the new owner responsible for unresolved breaches after notice and a reasonable cure period.
Estoppel certificates present a related trap. Signing a certificate stating that all required improvements have been completed and all allowances paid lets a new owner argue it acquired the property free of any outstanding obligations. Before signing any estoppel, verify that every promised improvement has been delivered and every dollar owed has been paid.