Commercial Leases: What to Check Before You Sign

The lease structures and what they actually mean

The structure determines which costs sit with you and which sit with the landlord. Two quoted rents can differ dramatically in real cost.

A triple net quote will always look cheaper per square foot than a gross quote for equivalent space, because it is not describing the same thing. Always compare on total occupancy cost.

CAM charges, the most commonly underestimated cost

Common area maintenance covers the shared parts of a property — parking, landscaping, lobbies, lifts, security, snow removal, shared utilities, management fees. In a net lease your share is usually proportional to your share of the building.

The problems are structural rather than occasional:

• Estimates become actuals. You pay monthly against an estimate, then face a reconciliation. Underestimates produce an unexpected bill.
• Capital items get included. Poorly drafted leases allow major replacements — a roof, a car park resurfacing — to be passed through as maintenance.
• Management fees stack. An administrative percentage on top of the underlying costs is common and rarely questioned.
• Vacancy shifts the burden. In some formulations, empty units mean remaining tenants absorb a larger share.

What to negotiate

• A cap on annual CAM increases, ideally cumulative rather than reset each year
• Exclusion of capital expenditure, or amortisation of it over the item's useful life rather than a single-year pass-through
• An audit right permitting you to inspect the supporting records
• A gross-up provision that protects you from vacancy-driven increases
• A clear exclusion list — leasing commissions, marketing, the landlord's own financing costs

You are paying for space you cannot use

Commercial space is normally quoted in rentable square feet, not usable square feet. The difference is your allocated share of common areas — corridors, lobbies, shared facilities — expressed as a load factor or common area factor.

A suite with a given usable area may be quoted at a materially higher rentable figure. That is standard practice rather than a trick, but it means two quotes are only comparable if you know both numbers.

Ask for the usable square footage and the load factor in writing, and compute your rent against usable space when comparing options. Where the space is unusual, an independent measurement is worth the small cost.

Escalation clauses compound

Almost every multi-year lease raises rent annually. The mechanism matters:

• Fixed percentage — a set annual increase. Predictable, and easy to model.
• Index-linked — tied to a published inflation measure. Fair in principle, unpredictable in practice; negotiate a ceiling.
• Stepped — specified dollar amounts at defined points. The most transparent.
• Market rate reset — typically at renewal. The most dangerous, because it is unknowable in advance.

Model the full term before signing. An increase that sounds trivial in year one compounds: over a ten-year lease, the final year's rent under a routine annual escalator is substantially above the first year's. Build the actual schedule into a spreadsheet and check the last year is affordable at realistic revenue, not optimistic revenue.

Personal guarantees and the good guy clause

Landlords generally require the owner to guarantee the lease personally, which means a failed business does not end the obligation — you can remain liable for years of remaining rent.

Refusing outright is rarely realistic for a small business. Limiting it often is:

• A capped guarantee — limited to a fixed number of months' rent rather than the entire term
• A burn-off provision — the guarantee reduces or terminates after a period of on-time payment
• A “good guy” clause — common in some markets: the guarantee is limited to amounts owed up to the point you vacate, provided you give proper notice, leave the space in agreed condition and are current on rent. It converts unlimited exposure into a defined exit.
• A larger security deposit offered in exchange for reducing the guarantee

These are among the most negotiable terms in a lease and among the least often raised by tenants. Ask.

Clauses that decide how much the lease constrains you

Use clause. Defines what you may do in the space. Drafted narrowly, it can block a natural evolution of your business. Negotiate language broad enough to cover plausible expansion.

Exclusivity. In a multi-tenant property, prevents the landlord leasing to a direct competitor. Valuable in retail and frequently obtainable.

Assignment and subletting. Governs whether you can transfer the lease. This is your exit route if you sell the business or need to leave — and a sale can fall apart over an unassignable lease. Seek consent that cannot be unreasonably withheld.

Tenant improvement allowance. A landlord contribution to fitting out the space. Confirm the amount, what qualifies, who controls the work, and how it is paid — reimbursement after completion is very different from funding upfront.

Repair and replacement obligations. HVAC is the recurring dispute. Leases often make tenants responsible for maintenance and replacement of systems they did not install. Negotiate a cap, or an exclusion for replacement of equipment already near end of life. Ask the age of the units.

Holdover. Sets what you pay if you stay past expiry. Penalty rates well above normal rent are standard; know the number.

Renewal options. A right to extend at a defined rent or a defined mechanism. Valuable, and often free to include at signing.

Relocation clause. Permits the landlord to move you within the property. If present, require that all costs are covered and that comparable space is guaranteed — or strike it.

Subordination and estoppel provisions. Determine what happens to your lease if the landlord's lender forecloses. Ask your lawyer about a non-disturbance agreement.

How to run the process

1. Use a tenant broker. In most commercial markets the landlord pays the commission, so representation is usually free to you. An unrepresented tenant negotiates against a professional alone.
2. Have a lawyer review it. A few hundred to a couple of thousand dollars against a commitment worth hundreds of thousands. This is not the place to economise.
3. Negotiate the letter of intent carefully. Business terms get anchored there, and reopening them later is far harder.
4. Ask for historic operating expense actuals before committing to any net structure.
5. Model the whole term — base rent, escalations, estimated CAM growth, utilities — and confirm the final year works.
6. Inspect properly. HVAC age, electrical capacity, plumbing, accessibility compliance, permitted occupancy. Discovering the power supply is inadequate after signing is your problem, not the landlord's.

Commercial tenants receive very little statutory protection. The lease is the whole of your position, and the moment before signature is the only point at which you have leverage.

Educational information only. This guide explains how US business finance generally works. It is not financial, tax, investment or legal advice, and it does not account for your circumstances. Tax figures change annually and rules vary by state — anything highlighted for verification must be confirmed against current IRS or state guidance. Consult a qualified professional before acting. See the full disclaimer.