Operating Expense Pass-Through Clause

An operating expense pass-through clause is the lease provision that allows the landlord to charge the tenant — directly or as part of CAM — for the cost of operating the building. It defines the expense categories that are passed through, which are excluded, how costs are allocated to the tenant, and (in better leases) what controls apply to keep landlord discretion bounded. It is the largest variable line item in most commercial leases after base rent and the most common source of disputes.

What it does in plain language

The clause translates the landlord's actual cost of running the building into a charge the tenant pays. In a triple-net lease, this is most of what the tenant pays beyond base rent. In a modified gross lease, this is the "above base year" portion. In a gross lease, it is bundled into the rent and not separately billed (though the landlord still allocates internally for reporting).

What a typical clause contains

The clause has three structural parts: definition of operating expenses, exclusions, and allocation mechanics.

Operating expense definition. The lease lists what counts as operating expense. The standard list:

• Real estate taxes and assessments
• Insurance premiums (property, liability, fidelity, rental loss)
• Utilities not separately metered to tenants (lobby, common areas, exterior, sometimes building-wide HVAC)
• Repairs and maintenance of building structure, common areas, equipment, mechanical systems
• Cleaning and janitorial of common areas
• Security and management costs
• Landscaping and exterior maintenance
• Trash and recycling
• Snow removal (where applicable)
• Reasonable management fees (typically capped at a percentage of effective gross income)
• Amortised capital costs (subject to negotiation)

Exclusions. Tenant-favourable leases exclude:

• Capital improvements (replacements with longer than X years' useful life), unless amortised
• Leasing commissions, brokerage fees, and tenant improvement allowances paid to other tenants
• Legal and professional fees related to leasing, financing, or litigation with other tenants
• Depreciation, amortisation, interest on debt, and other financing costs
• Costs reimbursed by insurance, warranty, or another tenant
• Original construction or replacement of building components covered by warranty
• Owner's general administrative overhead not directly related to the building
• Rent and real-estate taxes for the landlord's management office
• Charitable contributions, political donations, and dues to professional associations
• Costs related to remediation of pre-existing environmental conditions

Allocation. The tenant pays its pro rata share — typically the tenant's rentable area divided by the total rentable area of the building. Some allocation methods adjust for floor (lower floors pay less for elevator-related costs), use class (retail pays more for marketing), or other factors.

Sample wording

"Operating Expenses" means all costs reasonably incurred by Landlord in
operating, maintaining, repairing, and managing the Building, including
but not limited to: (i) real estate taxes and assessments; (ii) insurance
premiums; (iii) utilities not separately metered to tenants; (iv) building
repair and maintenance; (v) cleaning of common areas; (vi) security;
(vii) landscaping; (viii) trash and recycling; (ix) management fees not
exceeding three percent (3%) of effective gross income; and (x) capital
improvements amortised over their useful life with interest at five
percent (5%) per annum, provided such capital improvements are required
by law, reduce Operating Expenses, or extend the useful life of building
systems.

Operating Expenses shall NOT include: (a) leasing commissions; (b) tenant
improvement allowances; (c) costs of original building construction;
(d) depreciation, amortisation, or interest on financing; (e) costs
reimbursable by insurance or warranty; (f) ground rent payable by Landlord;
(g) Landlord's general overhead not directly related to the Building;
(h) costs of resolving disputes with other tenants; (i) costs incurred
to remediate pre-existing environmental contamination.

Controllable vs non-controllable

A useful distinction in many leases. Controllable operating expenses are the ones the landlord has discretion over — repairs, cleaning, supplies, management. Non-controllable expenses are taxes, insurance, and utilities, which the landlord has no realistic control over.

A tenant-favourable lease applies a cap on year-over-year increases in controllable expenses (typically 4% to 5%) while letting non-controllable expenses pass through at actual cost. This protects the tenant against landlord cost discipline failures while not requiring the landlord to absorb increases driven by external factors (tax assessments, insurance market hardening, utility rate changes).

What to negotiate — tenant side

Tenants want bounded operating-expense exposure. Push for:

Comprehensive exclusion list. The exclusions above are the standard tenant-favourable list. The lease should be explicit; "operating expenses customarily included in commercial leases" is too vague.

Capital expenditure constraints. Cap-ex should be amortised over useful life, not expensed. Useful life should be measured per industry standard (e.g., MACRS or building-component life tables). Cap-ex inclusion should be limited to: legal-compliance expenditures, expenditures that reduce operating expenses (with the savings demonstrably greater than the amortised cost), or expenditures required to maintain building Class.

Cap on controllable expenses. 4% to 5% year-over-year, subject to non-controllable carve-outs.

Management fee cap. 3% of effective gross income is industry standard. Some landlords push for 4%; some leases do not cap at all. Insist on a cap.

Audit rights. Already covered in the CAM reconciliation clause; the operating-expense pass-through clause should reference and integrate with it.

What to negotiate — landlord side

Landlords want:

Broad operating-expense definition. Include capital improvements without amortisation, broad management fees, and all costs the landlord considers building-related.

Limited exclusions. Push back on detailed exclusion lists; prefer general language that gives the landlord discretion.

No cap on controllable expenses. Inflation protection.

High management fee. 4% to 5% of effective gross income.

Pass-through of capital improvements at full cost, not amortised.

Common drafting traps

Definition by reference. "Operating expenses as defined under generally accepted accounting principles" is vague and unhelpful. Spell out the categories.

Capex pass-through ambiguity. "Capital improvements" without a definition lets the landlord push virtually any expenditure into the operating-expense pool. Define cap-ex as expenditures with useful life exceeding X years, capitalised on the landlord's books, requiring amortisation over useful life.

Marketing pool. Landlords sometimes include centre-wide marketing in operating expenses (especially in retail). Marketing should be a separate, transparent pool with its own contribution rate, not buried in CAM.

Affiliate management fees. Landlords sometimes pay above-market fees to affiliates for management, security, cleaning, or other services. The lease should require services from affiliates to be at market rate or limited to a benchmark.

Year-end true-up timing. The reconciliation clause governs this; if the operating-expense pass-through clause has different timing language, the two can conflict. Cross-reference cleanly.

APAC variations

Hong Kong office leases typically separate operating expenses into management fee (paid to the management company), government rent and rates (statutory), and air-conditioning charges (in some older buildings). The "operating expense" concept is split across these three buckets. The tenant should understand the total exposure across all three.

Singapore uses service charge as the dominant operating-expense vehicle, with GST applied. Capital improvements are typically the landlord's responsibility, not passed through.

In Japan, 共益費 (common service charge) is historically the operating-expense vehicle but is more often a fixed monthly amount than a true pass-through. International-grade Tokyo office leases now sometimes use US-style reconciliations.

If your portfolio mixes leases with different operating-expense definitions across markets, getting each lease's expense definition, exclusions, controllable cap, and management fee structure captured per lease with citations is what makes portfolio comparability possible. LeaseTrace extracts those fields with page-level references to the source PDF.