Overbilling in commercial leases is rarely deliberate. Most landlord accounting teams use standardized templates that don't account for lease-specific provisions. The result is a structural gap between what the lease says and what the template produces — and that gap shows up as overcharges on your reconciliation.
After testing reconciliation samples from published audit cases through CAMAudit, five patterns emerge consistently. They're not random. They're predictable, verifiable, and recoverable if you catch them while the audit window is open.
Pattern 1: Management Fee Applied to the Wrong Base
This is the most common finding in franchise CAM reconciliations. The management fee provision in a commercial lease typically limits the fee to a percentage of "controllable operating expenses" or "CAM expenses exclusive of taxes and insurance." The landlord's accounting system, however, often calculates the management fee as a flat percentage of total gross operating costs — including taxes, insurance, and sometimes capital reserves.
What it looks like in the reconciliation: The management fee line is a round percentage of a number that matches or closely matches the total operating expense pool, not a subset of it.
Why it happens: Property management software defaults to gross-basis management fee calculations. Lease-specific exclusions must be manually programmed, and they often aren't.
How to verify: Pull your lease management fee provision. Identify what the contractual base is. Calculate the management fee using that base. Compare to the billed amount.
Pattern 2: Denominator Omitting Anchor Exclusion
In multi-tenant centers with anchor tenants (grocery stores, big-box retailers, fitness chains), anchor tenants frequently negotiate a separate operating expense structure. They pay their own utilities, maintain their own area, and don't contribute to the shared CAM pool.
When an anchor is excluded from the CAM pool, they must also be excluded from the denominator used to calculate your pro-rata share. If the anchor's square footage remains in the denominator while their costs are excluded from the pool, your pro-rata share is artificially small — but you're paying a larger share of a smaller pool, which can still result in overpayment depending on the pool composition.
The most expensive version: the anchor is included in the denominator, your share appears low, but the costs being spread across a larger denominator include categories that should be excluded for all tenants — inflating the total pool on a different vector.
What it looks like: The denominator in the reconciliation matches or approximates the center's total GLA rather than occupied or leasable GLA net of anchor exclusions.
Why it happens: Anchor exclusion provisions require custom denominator calculations. The template denominator pulls from a master GLA figure.
How to verify: Request the denominator calculation and compare it against your lease definition of "rentable GLA" or "denominator GLA."
Pattern 3: Capital Items Billed as Operating Expenses
Commercial leases almost universally distinguish between capital improvements (must be amortized over useful life) and maintenance expenses (expensed in the year incurred). Parking lot resurfacing, HVAC replacement, and roof work are common examples of items that straddle this line — and the landlord frequently books them as maintenance to expense them in a single year.
What it looks like: Unusually large single-line items in the maintenance or repairs category — $40,000 for "parking lot maintenance," $28,000 for "roof repair," $18,000 for "HVAC service." Any single maintenance item that seems large relative to the center's total square footage warrants a closer look.
Why it happens: Landlords prefer single-year expensing because it simplifies their accounting and passes the full cost through immediately. Amortization over 15–20 years produces a much smaller annual pass-through.
How to verify: Request backup invoices for large maintenance line items. Determine whether the work described is maintenance (patching, cleaning, routine service) or capital improvement (full replacement, structural modification, new installation). Apply the useful-life amortization your lease specifies.
Pattern 4: Administrative Fees Double-Counted
Some landlords charge both a management fee and a separate administrative or accounting fee. When both are listed in the reconciliation, verify that both are authorized by the lease. More often, the lease authorizes a management fee inclusive of administrative overhead — and the administrative fee is an addition that isn't supported by any lease provision.
What it looks like: Two separate line items on the reconciliation — one for "property management fee" (typically 4–6% of expenses) and one for "administrative fee" or "accounting fee" (typically 1–2% or a flat dollar amount).
Why it happens: Property management contracts sometimes include separate administrative fees that the management company passes through. The landlord's obligation to the tenant is governed by the lease, not the property management contract.
How to verify: Review your lease for every authorized fee category. If the lease authorizes only a management fee, any separately named administrative or accounting fee is not an authorized pass-through.
Pattern 5: Insurance Deductible Included in the Pass-Through
Property insurance is a standard CAM pass-through. Insurance deductibles are not. When a property files an insurance claim and pays a deductible, that deductible is an event-driven cost associated with a specific claim — it's not an operating expense of maintaining the property.
What it looks like: The insurance line item increases substantially in years following a property damage event (storm, flood, vandalism). The increase may appear as an explicit "insurance deductible" line or may be embedded in a broader insurance category.
Why it happens: Landlords bill deductibles as property operating expenses because they represent money spent on the property. The lease provision for insurance typically covers premiums, not deductibles.
How to verify: Compare the insurance line year-over-year. Request backup documentation for any year where insurance costs increase by more than 15%. Confirm whether any claim events occurred. Verify that your lease does not include deductibles in the authorized insurance pass-through.
These five patterns cover the majority of common franchise CAM overcharges. All five are detected automatically by CAMAudit when you upload your reconciliation. Run a scan on your reconciliation now to see which findings apply to your location.
Frequently Asked Questions
Are these errors unique to franchise leases or do they appear in other commercial leases?
They appear in all commercial leases, but franchise operators are particularly exposed because they operate under standardized franchise agreements that don't include strong CAM audit guidance, and because their leases are often negotiated by franchisors who prioritize other terms.
What documentation do I need to prove a management fee error?
Your lease (specifically the management fee provision defining the calculation base), the reconciliation statement showing the billed management fee, and a simple calculation showing the contractual management fee versus the billed amount. That's sufficient documentation for a written dispute.
Can a landlord correct a billing error prospectively without crediting prior years?
A landlord can correct the calculation going forward at any time. Whether prior years are credited depends on your dispute — the landlord isn't required to credit prior years unless you submit a formal written dispute within the audit window. Correction going forward without a retroactive credit is not a resolution.
What's the typical value of a denominator error?
The dollar impact depends on how large the excluded anchor is relative to the center and how large the shared CAM pool is. Anchors occupying 20–35% of a center's GLA are common. If their exclusion changes your pro-rata share from 3.8% to 4.7%, the dollar impact at a $200,000 pool is roughly $1,800/year.
How do I request backup documentation from my landlord?
Cite your lease audit rights provision in writing. State that you are exercising your right to audit the [year] reconciliation and request the detailed general ledger, vendor invoices for specific line items, and the denominator calculation worksheet. Landlords are contractually required to provide this documentation — most do so within 30–60 days.