CAM Charge Estimator

Estimate your Common Area Maintenance (CAM) charges based on your lease's pro-rata share, the landlord's operating expenses, and any applicable caps.

sq ft

The rentable square footage of your leased space

sq ft

Total leasable square footage of the entire building

$

Total annual CAM/operating expenses for the entire building

% (0 = no cap)

Maximum annual percentage increase in your CAM charges (0 if uncapped)

$

Enter 0 for NNN/triple-net leases; for gross leases enter the base year CAM included in rent

years

Number of years to project total CAM costs

Total CAM Over Lease Term

Monthly CAM (Year 1)

Annual CAM (Year 1)

Final Year Monthly CAM

Pro-Rata Share

Enter your numbers to see results.
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How This Calculator Works

Frequently Asked Questions

What expenses are typically included in CAM charges?
CAM charges typically include: landscaping and snow removal, parking lot maintenance and lighting, common area cleaning, security systems, property management fees, property insurance, and sometimes property taxes. In NNN leases, they can also include structural repairs and roof maintenance. Always request a detailed breakdown of what your lease includes in CAM before signing.
What is a CAM cap and why is it important?
A CAM cap limits how much your CAM charges can increase each year, regardless of actual expense growth. A 5% cap means your CAM costs can never increase more than 5% per year from the base year amount, even if actual building expenses skyrocket. Without a cap, your occupancy costs can become unpredictable and potentially unaffordable.
Can I audit the landlord's CAM charges?
Many leases include an audit right that allows tenants to inspect the landlord's expense records and verify that CAM charges are being calculated correctly. This right is valuable — studies show that CAM reconciliations frequently contain errors, and most errors favor the landlord. Exercise your audit right within any deadline specified in the lease, typically 12 months after receiving the annual reconciliation statement.

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