A 5-year lease on a 2,500-square-foot space at $28 per square foot is a $350,000 commitment. Yet most business owners sign after reviewing only the rent amount and the term length. The rest — escalations, CAM charges, personal guarantees, exit rights — gets skimmed or ignored entirely.
That's a costly mistake. Commercial leases are drafted by the landlord's attorneys and are designed to protect the landlord's interests. Knowing how to read a commercial lease puts you in a position to negotiate better terms, avoid hidden costs, and protect your business.
Here's a step-by-step breakdown of the 10 clauses that matter most.
Step 1: Start with the Lease Summary (If There Is One)
Many commercial leases include a summary or "basic terms" page at the front. This typically lists the tenant, landlord, premises address, square footage, base rent, lease term, and security deposit. It's a useful overview, but it's not the lease.
The actual terms that govern your obligations are in the body of the lease, the exhibits, and any riders or amendments. Always read the full document — not just the summary.
Step 2: Understand the Lease Term and Commencement
The lease term defines how long you're committed. But pay close attention to the commencement date — it may not be the date you sign. Many leases tie commencement to a "substantial completion" date for tenant improvements, which can be vague and lead to disputes.
- Is the commencement date fixed or contingent on buildout?
- What happens if construction is delayed — do you get rent abatement?
- Is there a "drop-dead" date where you can walk away if the space isn't ready?
Step 3: Calculate Your Total Rent (Not Just Base Rent)
Base rent is just the starting number. Your actual occupancy cost includes rent escalations, CAM charges, property taxes, insurance, and utilities. Always calculate the total cost over the full lease term.
Example: $24/sq ft base rent + $8/sq ft CAM + 3% annual escalations on a 3,000 sq ft space = approximately $520,000 over 5 years, not the $360,000 that base rent alone suggests.
Rent Escalation Clause
Almost every commercial lease includes annual rent increases. The three most common structures:
| Escalation Type | How It Works | Risk Level |
|---|---|---|
| Fixed Percentage | Rent increases by a set % each year (e.g., 3%) | Low — predictable |
| CPI-Based | Tied to Consumer Price Index / inflation | Medium — can spike |
| Market Rate Reset | Rent adjusts to current market rates at intervals | High — unpredictable |
Negotiate: Push for fixed increases with a cap. If CPI-based, negotiate a floor and ceiling (e.g., 1% minimum, 4% maximum).
Step 4: Decode CAM Charges
Common Area Maintenance (CAM) charges cover shared building expenses — landscaping, parking lot upkeep, security, insurance, and property management. CAM can add 20–40% on top of your base rent.
- Is there a CAM cap? Without one, your costs can increase without limit
- Are capital expenditures excluded? Roof replacements and HVAC overhauls shouldn't be in your CAM bill
- Is there an administrative fee? Landlords often add 10–15% on top of actual CAM costs
- Do you have audit rights? Over 80% of CAM reconciliations contain errors that favor the landlord
Step 5: Review the Use Clause
The permitted use clause defines exactly what you can do in the space. A clause that's too narrow can prevent you from pivoting or expanding your business.
"General retail use" is better than "women's clothing retail." If you plan to add e-commerce fulfillment, food service, or other activities, negotiate that flexibility now — not after you've signed.
Step 6: Check Renewal Options
A renewal option protects you from losing your location when the lease expires. Without one, the landlord can refuse to renew or demand a massive rent increase.
- Notice period: Most renewal options require 6–12 months' written notice. Miss the deadline by one day and you lose the option entirely
- Renewal rent: Is it at a fixed rate, a predetermined increase, or "fair market value"? FMV renewals can result in sticker shock
- Number of options: Two 5-year renewal options give you up to 15 years of location security
Pro tip: Calendar every critical date in your lease — renewal deadlines, escalation dates, option exercise windows. Missing a single deadline can cost tens of thousands.
Step 7: Understand Assignment and Subletting Rights
If your business needs change, can you transfer the lease to a new tenant or sublet part of your space? Many leases restrict this severely.
- Does the landlord have the right to "unreasonably withhold" consent, or just "withhold" consent? The word "unreasonably" is critical
- Watch for recapture clauses — the landlord takes back the space instead of allowing a sublet
- Check for profit-sharing requirements if you sublet at a rate higher than your rent
Step 8: Examine the Personal Guarantee
Many landlords require business owners to personally guarantee the lease. If your business can't pay rent, the landlord can pursue your personal assets — savings, home, vehicles.
On a 5-year lease at $7,000/month, an unlimited personal guarantee means up to $420,000 in personal liability.
Negotiate: Push for a "burning" guarantee that decreases each year, or cap it at 6–12 months of rent. Ensure the guarantee terminates upon valid assignment.
Step 9: Review Default and Cure Provisions
The default clause defines what triggers a breach and how much time you have to fix it. Some leases give you as little as 5 days to cure a late rent payment before the landlord can begin eviction.
- Negotiate for at least 10–15 days for monetary defaults and 30 days for non-monetary defaults
- Watch for acceleration clauses that make the entire remaining rent due immediately upon default
- Ensure the landlord has a duty to mitigate damages — they must make reasonable efforts to re-lease the space
Step 10: Look for Exit Clauses
Most standard commercial leases don't include early termination rights. If the lease doesn't have one, you're locked in for the full term with no way out except negotiating a buyout.
Negotiate: Add an early termination clause with a defined penalty (typically 3–6 months' rent plus unamortized tenant improvement costs). Also check for co-tenancy provisions if you're in a multi-tenant property — if an anchor tenant leaves, you may want the right to exit or renegotiate.
Quick Reference: 10 Clauses at a Glance
| Clause | What to Check | Negotiation Priority |
|---|---|---|
| Lease Term & Commencement | Start date, buildout contingencies | Medium |
| Base Rent & Escalations | Total cost over full term, escalation type | High |
| CAM Charges | Cap, exclusions, audit rights | High |
| Permitted Use | Breadth of allowed activities | Medium |
| Renewal Options | Notice period, renewal rent formula | High |
| Assignment & Subletting | Consent standard, recapture rights | Medium |
| Personal Guarantee | Scope, duration, cap | High |
| Default & Cure | Cure periods, acceleration clauses | High |
| Early Termination | Exit rights, penalty structure | Medium |
| Maintenance & Repairs | Tenant vs. landlord responsibilities | Medium |
The Bottom Line
Reading a commercial lease isn't about understanding every legal term — it's about knowing which clauses carry the biggest financial impact and negotiating them before you sign. The 10 clauses above represent the areas where tenants most commonly lose money, flexibility, or both.
Take the time to review each one carefully. Consult a CRE attorney for high-stakes provisions. And never assume standard terms are non-negotiable — they almost always are.