Most tenants receive CAM reconciliation statements, compare the balance due to their budget, and write the check. Very few go further. That passivity is expensive: professional CAM auditors report that overcharges exceeding 10% of the reconciled amount are found in a significant share of the statements they review. The landlord's statement is the starting position, not the final word.
Disputing CAM charges is a structured process that requires documentation, timing awareness, and clear written communication. This guide walks through each step.
Step 1: Request the Reconciliation Statement and Detailed Backup
You cannot dispute what you cannot see. Start by requesting the full reconciliation package -- not just the summary statement, but the general ledger detail and supporting invoices for major line items.
Most leases give tenants the right to request backup documentation. Send a written request to the landlord or property manager within the audit rights window (typically 12 to 18 months after delivery of the reconciliation statement). Specify in writing that you are requesting:
- The full operating expense ledger for the reconciliation period
- Invoices or contracts for all line items exceeding a defined threshold (ask for everything over $5,000)
- The insurance declarations page for the property
- Documentation supporting any management fee allocation, including the management agreement if an affiliated entity is involved
- The property tax bill and any assessment notice
Give the landlord 30 days to produce the records. Many leases specify a response deadline for audit requests. Note that deadline in your written request.
Step 2: Review the Statement Against Your Lease Definitions
With the backup in hand, the real work begins: comparing each expense item to what your lease actually allows.
Start with the CAM definition in your lease. Pull the article or section that defines operating expenses and read it carefully. Then read the exclusions list -- this is where the most money is typically recovered. Common exclusions include:
- Capital expenditures (roof replacement, HVAC system replacement, major renovations)
- Costs related to other tenants' spaces (tenant improvements, leasing commissions, vacancy costs)
- Landlord's legal fees unrelated to building operations
- Costs that are covered by insurance proceeds
- Above-market management fees or fees paid to affiliated entities above market rate
- Fines, penalties, and environmental remediation costs from landlord negligence
- Depreciation on building systems or equipment
For each line item in the reconciliation, ask: does my lease permit this charge to pass through? If yes, does the amount match what the lease formula produces? If no, this item is a dispute candidate.
Also verify the gross-up calculation if your lease includes a gross-up provision. Confirm the gross-up percentage matches the lease, and that it is applied only to variable expenses on the permitted list.
Step 3: Identify Specific Line Items to Challenge
Do not challenge everything -- challenge what the lease actually supports. Identifying every potentially disputable item and then picking the ones with clear contractual support makes your dispute credible and keeps negotiations productive.
Create a dispute log with three columns: line item, your lease's treatment, and the dollar impact. Common items that tenants frequently recover on:
Management fees above the lease cap. If the lease caps the management fee at 4% of gross revenues and the landlord charged 5.5%, the excess is recoverable.
Misclassified capital expenditures. Parking lot repaving, roof repairs exceeding a certain dollar threshold, and HVAC equipment replacement are frequently passed through as maintenance when they should be capital.
Gross-up on ineligible expenses. If the lease defines specific expenses eligible for gross-up and the landlord grossed up additional line items, the excess gross-up is an overcharge.
Insurance proration errors. Multi-property landlords sometimes allocate portfolio-level insurance premiums without adequate per-property documentation.
Administrative fees stacked on management fees. If the lease has a single management fee and the landlord is charging both a management fee and a separate "administrative overhead" or "accounting fee," that may be impermissible double-charging.
Step 4: Document Each Dispute with Lease Language
A CAM dispute is only as strong as the lease language supporting it. For each item you intend to dispute, write out:
- The item you are disputing and the amount
- The specific lease section that excludes or limits the charge (quote the exact language)
- The dollar difference between what was charged and what the lease allows
- The backup evidence (invoice, ledger entry, management fee calculation) that shows the overcharge
This documentation serves two purposes. First, it forces you to confirm that your dispute has contractual support before sending it. Disputes that cannot be tied to specific lease language are weak bargaining positions. Second, it becomes the foundation of your formal dispute letter and any subsequent negotiation.
Step 5: Send a Formal Audit Request Letter Within the Audit Rights Window
Timing is critical. Your lease specifies a window during which you can exercise audit rights -- missing this window waives them. Send a formal written notice that:
- States you are exercising your audit rights under the specific lease section (cite the section number)
- Identifies the reconciliation year being audited
- Lists the specific records you are requesting
- Notes the date the reconciliation statement was delivered (this starts the audit window)
- Requests that the landlord confirm receipt and provide the records within 30 days
Send this letter by certified mail or email with read receipt to the contact specified in the lease's notice provision. Keep a copy and proof of delivery. Even if your audit will not be completed before the window closes, a timely written notice preserves the right.
If you have already identified specific disputes, you can include a preliminary dispute notice in the same letter -- but making the audit request and the dispute are separate acts. An audit request asks for documentation; a dispute challenges a specific charge.
Step 6: Engage a CAM Auditor if Needed
For complex leases, large properties, or disputes exceeding $10,000, professional CAM auditors add significant value. They know what to look for in the general ledger, understand common landlord accounting practices, and can interpret lease language in the context of industry norms.
Most CAM auditors work on a contingency basis -- they take a percentage of what they recover. This means the audit costs you nothing unless they find overcharges, and their fee is paid from the recovery. For large portfolios, retainer-based auditors are also common.
When selecting an auditor, ask about their experience with the property type (retail, office, industrial) and the landlord's organization if known. Some auditing firms specialize in institutional landlords and know their typical accounting practices and common overcharge patterns.
Step 7: Negotiate a Settlement
CAM disputes rarely end in litigation. The standard resolution is a negotiated settlement where the landlord agrees to credit a portion of the disputed amount against future CAM payments or applies it as a reduction to the final reconciliation balance.
Enter the negotiation with your documented dispute log and be prepared to prioritize. Some items may settle at 100 cents on the dollar; others may settle at 50%. The items with the clearest contractual support are your strongest negotiating chips.
Key principles for settlement negotiation:
- Do not make payment on disputed amounts without a written reservation of rights
- Get any settlement in writing, including how credits will be applied
- Confirm that the settlement resolves only the stated reconciliation year and preserves your rights for future years
- If the landlord refuses to engage, confirm your dispute is on record in writing and consult with a real estate attorney before the audit rights window closes
What Landlords Frequently Overcharge For
Based on patterns identified by lease auditors across commercial property types, these are the most common overcharge categories:
- Management fees on excluded or non-qualifying revenue
- Capital expenditures labeled as repairs or maintenance
- Insurance premiums for coverage that is not property-specific
- Administrative and accounting fees in addition to management fees
- Gross-up applied to fixed expenses that do not vary with occupancy
- Pro-rata share calculated using incorrect denominators
- Tax appeal refunds not passed through to tenants
- Costs for vacant spaces or dark anchor spaces allocated to other tenants
The foundation of every successful CAM dispute is an accurate lease abstract that captures the CAM definition, exclusions list, cap structure, audit rights language, and management fee limits in structured, searchable form. When you know exactly what your lease says on each of these points, disputes become straightforward comparisons rather than document hunts.