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Don’t get screwed.</text><text x="58" y="258" font-family="Arial,Helvetica,sans-serif" font-size="30" font-weight="600" fill="#6b5b4d">Leases, TI, NNN &amp; buildouts — negotiated in your favor</text><g transform="translate(1010,86)" fill="none" stroke="#C0531F" stroke-width="9" stroke-linejoin="round"><rect x="20" y="40" width="150" height="130"/><line x1="20" y1="40" x2="95" y2="6"/><line x1="170" y1="40" x2="95" y2="6"/><rect x="50" y="80" width="36" height="36"/><rect x="104" y="80" width="36" height="36"/><rect x="74" y="128" width="42" height="42"/></g></svg>

How Do I Negotiate Operating-Expense (OpEx) Stops?

Direct Answer

An operating-expense (OpEx) stop is the dividing line that decides who pays the building's running costs — taxes, insurance, utilities, janitorial, repairs, management. The landlord covers OpEx up to the stop; you pay everything above it. The money-move that protects you: insist on a base-year stop, where the stop equals the actual operating expenses in your first full lease year, and then negotiate a cap on annual increases of 3%-5% on controllable expenses. If your base year OpEx is $8.00/sq ft and costs climb to $8.80 the next year, you only owe the $0.80/sq ft increase — and with a 5% cap on controllables, the landlord can't pass through more than ~$0.40 of that.

The trap is a stop set artificially low (an "expense stop" of $6.50 when real costs are $8.00), which makes you pay the $1.50 gap from day one. Demand a true base-year stop, a gross-up clause that protects YOU, a cap on controllable expenses, an exclusions list that strips out capital costs and landlord overhead, and audit rights. Done right, base-year stops can cut your annual pass-through bill by 15%-30%.

How OpEx Stops Actually Work

Two common structures, and they are not the same:

• Base-year stop: The stop = your actual first-year operating expenses. You pay only increases over that base. This is tenant-friendly because the stop reflects reality.
• Expense stop (fixed dollar): The landlord sets a fixed number — say $6.50/sq ft — regardless of real costs. If actual costs are $8.00, you eat the $1.50 gap immediately. This is a hidden rent increase. Avoid it unless the stop is set at or above true current costs.

In a full-service gross lease, OpEx is bundled and the stop matters enormously. In a triple-net (NNN) lease, you pay your pro-rata share directly with no stop — so caps and exclusions matter even more there. Either way, the principle holds: control what's in the bucket and how fast it can grow.

BOMA publishes the standard expense categories landlords use, and a tenant-rep broker should reconcile your lease against them.

Move 1 — Get a True Base-Year Stop, Not a Lowball Expense Stop

Always negotiate the stop as your actual first full calendar year of operating expenses. This forces the landlord to absorb the real baseline cost of running the building, and you only pay growth. Two traps to watch:

• A "low" base year. If the landlord's base year had unusually low costs (e.g., the building was half-empty so utilities and janitorial were low), your pass-throughs spike the moment occupancy normalizes. Fix this with a gross-up clause (next move).
• A fixed expense stop disguised as a base. If they offer $6.50/sq ft while you know real costs run $8.00, you're paying $1.50/sq ft = $15,000/year on a 10,000 sq ft space before any increase. Reject it or get the stop raised to true cost.

Move 2 — Demand a Gross-Up Clause That Works for YOU

A gross-up clause adjusts variable expenses as if the building were 95%-100% occupied. This cuts both ways, and you want it on your terms:

• In your base year, gross-up protects you: if the building was only 70% occupied, ungrossed costs look artificially low, making your future increases look huge. Grossing the base year up to full occupancy sets a fair, higher baseline.
• In comparison years, the gross-up should use the same occupancy assumption so you're comparing apples to apples.

Insist the gross-up applies consistently to both the base year and every comparison year, and only to variable expenses (janitorial, utilities, management fees that scale with occupancy) — never to fixed costs like insurance or taxes. An inconsistent gross-up is a classic way landlords inflate your share.

Move 3 — Cap Controllable Expenses at 3%-5% Annually

Split operating expenses into two buckets:

• Controllable expenses — landscaping, janitorial, management fees, repairs, administrative costs. The landlord controls these. Cap their year-over-year increase at 3%-5%.
• Uncontrollable expenses — property taxes, insurance, utilities, snow removal. Harder to cap because the landlord can't control them, though you can sometimes get a cumulative cap that lets unused cap room carry forward.

A 5% cap on controllables is the market norm in tenant-favorable deals. Push for cumulative caps (caps that average over the term) rather than non-cumulative (year-by-year), because cumulative caps prevent a single spike year from blowing past your protection. CBRE and JLL lease-advisory data show management fees and "administrative" charges are the most padded line items — cap them hard.

Move 4 — Strip the Exclusions List

What's *in* the OpEx bucket is half the battle. Negotiate an exclusions list that removes costs that aren't legitimate operating expenses. Demand exclusion of:

• Capital expenditures — roof replacement, HVAC system replacement, structural repairs (these benefit the landlord's asset, not your occupancy). If capital items must be passed through, require they be amortized over their useful life and only the annual amortized portion charged.
• Landlord overhead — corporate salaries, leasing commissions, marketing, and advertising to attract new tenants.
• Capital reserves and depreciation.
• Costs reimbursed by insurance, warranties, or other tenants.
• Management fees above market (cap at 3%-5% of gross rents).
• Costs to fix building-code violations or pre-existing defects.
• Tenant-specific costs for other tenants' build-outs or services you don't receive.

Each excluded line shrinks the bucket you pay a percentage of. A tight exclusions list routinely cuts pass-throughs by 10%-20%.

Move 5 — Lock In Audit Rights and Reconciliation Terms

You can't trust a number you can't verify. Negotiate:

• The right to audit the landlord's OpEx statements at least once per year, within 90-120 days of receiving the annual reconciliation.
• A landlord-pays-the-audit trigger: if the audit uncovers an overcharge greater than 3%-5%, the landlord pays for your audit and refunds the overage within 30 days.
• A reconciliation deadline: the landlord must deliver the annual statement within 90-120 days of year-end, or lose the right to bill for that year.
• Detailed line-item statements, not a single lump number — you can't audit what you can't see.

Landlords overcharge on OpEx more often than tenants realize, frequently through misclassified capital items and inflated management fees. An annual audit by a lease-audit specialist often recovers multiples of its cost.

Move 6 — Don't Forget the Pro-Rata Share Math

Your share of OpEx over the stop = your square footage ÷ total leasable building area. Verify the denominator. Landlords sometimes use leased area (smaller, so your share is bigger) instead of total leasable area. Insist your pro-rata share is based on total rentable area of the building, and that the percentage is fixed in the lease, not recalculated to your disadvantage as the building's occupancy changes.

FAQ

What's the difference between a base-year stop and an expense stop? A base-year stop sets your protection at the building's actual first-year operating expenses, so you pay only real increases. A fixed expense stop is an arbitrary dollar number the landlord picks — if it's set below true costs, you pay the gap immediately.

Always push for the base-year stop set to actual costs.

What is a gross-up clause and do I want one? A gross-up clause adjusts variable expenses as if the building were 95%-100% occupied. You want it in your base year so a partly empty building doesn't create an artificially low baseline that makes your future increases balloon.

Insist the gross-up apply consistently to both the base year and comparison years.

How much can I cap operating-expense increases? Negotiate a 3%-5% annual cap on controllable expenses (janitorial, management, landscaping, repairs). Uncontrollables — taxes, insurance, utilities — are harder to cap, but you can sometimes get a cumulative cap that averages spikes across the lease term.

What should I exclude from operating expenses? Capital expenditures, landlord overhead and commissions, depreciation, capital reserves, insurance-reimbursed costs, above-market management fees, and code-violation fixes. A tight exclusions list commonly cuts your pass-through bill by 10%-20%.

Can I check whether the landlord is overcharging? Yes — negotiate annual audit rights with a 90-120 day window, detailed line-item statements, and a clause that makes the landlord pay for the audit and refund the overage if an audit finds an overcharge above 3%-5%. OpEx overcharges are common, and audits frequently pay for themselves many times over.

Sources

• BOMA International, Standard Methods of Measurement and Operating Expense Categories — definitions of operating expenses and gross-up standards.
• CBRE, Office Occupier and Lease Advisory Reports — base-year vs. Expense-stop benchmarks and pass-through trends.
• JLL, Lease Administration and Occupier Services — controllable-expense caps and exclusion best practices.
• Cushman & Wakefield, Tenant Advisory — gross-up, audit rights, and reconciliation norms.
• NAIOP, Commercial Real Estate Leasing Resources — operating-expense structuring guidance.
• Tenant-rep broker and lease-audit specialist advisories on OpEx exclusions and overcharge recovery.
• IREM (Institute of Real Estate Management) operating-expense classification standards.