The property cost
Identify the actual service, vendor, amount, and year.
Check: Vendor invoice · category ledger
Commercial property expenses
Follow shared costs from property to tenant.
CAM is the label often used for common-area operating costs at a commercial property. The property budget, lease-defined cost pool, allocation method, and annual statement all affect the tenant's bill.
At a glance
01
The property cost
Identify the actual service, vendor, amount, and year.
02
The lease cost pool
Check whether the expense belongs in a permitted CAM category.
03
The tenant allocation
Review the area basis, share percentage, and any separate building or center pool.
The signed lease, annual statement, and available records determine what can be verified.
A practical review
Four points where the calculation takes shape.
Looking at the charge as a sequence helps separate a property expense from a tenant obligation.
The lease cost pool
Check whether the expense belongs in a permitted CAM category.
Check: Operating expense definition
The tenant allocation
Review the area basis, share percentage, and any separate building or center pool.
Check: Area schedule · share worksheet
The year-end statement
See how estimates, fees, limits, and credits changed the final balance.
Check: Reconciliation · payment ledger
An illustrative example
One property expense can create several questions.
Imagine a center-wide landscaping contract is allocated across tenants. The invoice supports the expense, but the lease and area schedule still determine whether and how much this tenant pays.
Illustrative example. An invoice is only one part of the tenant-share calculation.
Illustrative review worksheet
Property
Center-wide landscaping invoice.
Lease
Is landscaping an included common-area expense?
Allocation
Which area pool and tenant percentage apply?
Bill
Were estimates and credits handled correctly?
Go one step deeper
Learn how the year-end reconciliation works.
The reconciliation brings property costs, allocation, and estimates together in one annual statement.
Related guides
Keep the document trail together.
Triple-net leases
See how CAM can fit into a wider expense arrangement.
Read the guide ↗Pro-rata share
Understand area-based allocation.
Read the guide ↗CAM charges
Read the tenant-facing statement categories.
Read the guide ↗Common questions
What the documents can tell you.
Is every property expense a CAM charge?
No. The lease may exclude or condition certain costs, and the expense must be allocated under the applicable method.
Can different tenants have different CAM shares?
Yes. Leases and expense pools may use different area or allocation rules.
Does a flagged item prove an overcharge?
No. It is a question to verify against the signed lease, the annual statement, and supporting records. A charge can be valid even when it warrants review.
Is there a standard audit deadline?
No. Read the signed lease and amendments for the trigger, period, required action, recipient, and delivery method. Different review steps may have different rules.
Your next step
Start with your own lease language.
Upload a readable signed lease for a free preview. Add an annual CAM or NNN statement if you have one, then decide whether a full report would help organize your questions.