noun · /kæm/
CAM
Also known as: Common Area Maintenance, CAM Charges, Operating Expenses
Definition
CAM (Common Area Maintenance) charges are fees paid by commercial tenants to cover their share of maintaining common areas and shared property expenses. Unlike residential leases where landlords absorb these costs, commercial leases often pass operating expenses through to tenants proportionally based on the space they occupy.
Pro-Rata Share Formula
Tenant CAM = (Tenant SF ÷ Total SF) × Annual CAM
Example: 5,000 SF tenant in 50,000 SF building with $150,000 CAM = $15,000/year
What's Typically Included in CAM
Standard CAM Items
- Landscaping — lawn care, irrigation, seasonal plantings
- Parking lot — striping, repairs, lighting, snow removal
- Common utilities — hallway lighting, exterior fixtures
- Security — guards, cameras, access systems
- Janitorial — common area cleaning, trash removal
- Property management — typically 3-6% of gross rent
- Insurance — property and liability coverage
- Property taxes — real estate tax assessments
Should NOT Be Included
- Capital expenditures — roof replacement, HVAC systems
- Leasing costs — commissions, tenant improvements
- Debt service — mortgage payments
- Landlord's income taxes
- Legal fees — except property-wide matters
- Repairs from landlord negligence
- Marketing/advertising — for property leasing
- Executive salaries — above on-site manager
Always Read the Lease
CAM inclusions are defined in the lease—there's no standard. Some landlords try to include capital reserves, above-market management fees, or administrative charges. Tenants should negotiate exclusions for items that benefit the landlord more than tenants.
CAM Calculation Example
Calculate CAM charges for a retail tenant in a shopping center:
Property Details
Tenant Details
Annual CAM Expense Breakdown
Tenant's Annual CAM
3,500 SF ÷ 100,000 SF = 3.5% pro-rata share
$400,000 × 3.5% = $14,000/year
Monthly CAM: $1,166.67 | Per SF: $4.00
Total Monthly Occupancy Cost
Base Rent
$8,167/mo
CAM
$1,167/mo
Total
$9,334/mo
CAM Billing Structures
Actual/Variable CAM
Tenant pays their pro-rata share of actual expenses. Landlord reconciles annually— tenant may owe more or receive a credit.
Fixed CAM
Tenant pays a set CAM amount (e.g., $4.00/SF) with scheduled increases (e.g., 3%/year). No reconciliation—landlord absorbs overages or keeps savings.
CAM Caps & Tenant Protections
Smart tenants negotiate CAM caps and exclusions to limit exposure to expense increases:
CAM Caps
Limits annual CAM increases to a fixed percentage:
- • Cumulative cap: Total CAM can't exceed X% above year 1 (e.g., 15% over 5 years)
- • Non-cumulative cap: CAM can't increase more than X% per year (e.g., 5%/year)
- • Controllable CAM cap: Cap only applies to expenses landlord controls (excludes taxes, insurance)
Key Negotiation Points
For Tenants
- • Negotiate CAM caps (3-5% annual)
- • Exclude capital expenditures
- • Cap management fee percentage
- • Require detailed annual accounting
- • Right to audit CAM expenses
For Landlords
- • Use non-cumulative caps
- • Exclude uncontrollable expenses
- • Include capital reserve contributions
- • Administrative fee for reconciliation
- • Gross-up provision for vacant space
Understand Your Rent Roll Economics
Upload your rent roll to see lease types, CAM structures, and total occupancy costs at a glance. CleanRoll.ai standardizes the data for easy analysis.