How does CAMAudit detect overcharges?

CAMAudit runs 14 deterministic detection rules on your uploaded lease and CAM reconciliation statement. Each rule checks a specific billing mechanism: fee calculations, pro-rata share formulas, gross-up provisions, caps, and expense classifications. Rules are triggered only when your documents contain the relevant terms.

What documents do I need to upload?

You need your commercial lease (including all addenda) and your CAM reconciliation statement from your landlord. Both are required. Upload the most recent reconciliation statement first; you can add prior years afterward to check for multi-year overcharges.

How much does a CAMAudit scan cost?

The free scan runs the full pipeline at no cost and shows your total potential recovery. Unlock the full report with line-item findings and a dispute letter draft for a flat fee. No contingency fees. You keep 100% of any recovery.

How long does it take to get results?

The full audit pipeline runs in under 15 minutes for most documents.

How Anchor Tenant Exclusions Inflate Your Retail CAM Bill

If you're an in-line retail tenant in a shopping center with a grocery store, department store, or big-box anchor, your CAM bill almost certainly reflects the anchor exclusion, even if no one told you about it.

The anchor exclusion is a negotiated provision in most anchor tenant leases that exempts the anchor from contributing to the shared CAM pool. In exchange for bringing traffic to the center, major anchors often pay reduced or zero CAM, while contributing 30% to 60% of the property's gross leasable area. The math consequence: when a tenant occupying 40% of the center pays nothing, the remaining 60% of tenants pay 100% of costs. Each in-line tenant's effective cost per square foot goes up. Dollar stores and value retailers are particularly exposed because they typically sign standardized landlord-form leases in anchored centers without negotiating the denominator definition. Grocery and supermarket tenants are sometimes themselves the anchor in smaller neighborhood centers, which creates a reverse problem: their lease may be drafted to keep them out of the denominator when they are the highest-traffic tenant.

That's the intended structure, when it's properly documented in your lease. The overcharge occurs when the denominator in your pro-rata calculation is adjusted to exclude the anchor's square footage without your lease explicitly authorizing that adjustment. You end up with a larger percentage than you agreed to, paying more than your contract requires. More on that below.

Anchor Tenant Exclusion: A negotiated provision in a major tenant's lease that removes the anchor's square footage from the shared CAM pool denominator. When applied without explicit authorization in your own lease, this substitution inflates every in-line tenant's pro-rata share and can produce thousands of dollars in annual overcharges.

The Denominator Problem: GLA vs. GLOA

Your pro-rata share is calculated as your square footage divided by some measure of the total property's square footage. The question is: which total?

Gross Leasable Area (GLA): All leasable square footage in the center, including anchors, regardless of whether each tenant pays CAM. If your lease uses GLA, the anchor's square footage is in the denominator even if the anchor is excluded from the cost pool.

Gross Leasable Occupied Area (GLOA): Only the square footage of tenants actually occupying and (usually) paying into the shared pool. If your lease uses GLOA, the anchor's square footage is excluded from the denominator.

Here's what the data shows: the same property looks entirely different under each method. Consider:

Scenario	Tenant SF	Anchor SF	Total Property	Denominator	Tenant Share	CAM at $500K Pool
GLA method	5,000 SF	60,000 SF (excluded from cost)	100,000 SF	100,000 SF	5.0%	$25,000
GLOA method	5,000 SF	60,000 SF (excluded from pool AND denominator)	100,000 SF	40,000 SF	12.5%	$62,500

Same center, same tenant, same square footage. The GLA method produces $25,000; the GLOA method produces $62,500, a $37,500 difference driven entirely by whether the anchor's square footage is in the denominator.

If your lease defines pro-rata share using GLA, the landlord cannot switch to GLOA without a lease amendment. That switch, if unauthorized, produces an overcharge of $37,500 annually in this example.

How to Check Which Method Your Lease Uses

Find the pro-rata definition. Look in Article 1 (Definitions) or the CAM pass-through article, often Article 4 or 5. The definition will say something like "Tenant's Proportionate Share means a fraction, the numerator of which is the rentable square footage of the Premises, and the denominator of which is..."
Read the denominator definition carefully. Look for one of these phrases:
- "...total rentable square footage of the Building", GLA method
- "...total rentable square footage occupied by tenants", GLOA method
- "...Gross Leasable Area of the Shopping Center", GLA method
- "...as adjusted from time to time to reflect occupancy", GLOA-adjacent, creates flexibility
Compare against the reconciliation. The reconciliation statement should show the denominator used. If it shows a number smaller than the total GLA of the property, say, 80,000 SF in a property you know to be 140,000 SF, ask why.

When the Anchor Exclusion Is Legitimate

Think about it: anchor exclusions are not inherently an overcharge. They are a common and well-established deal structure. The issue is whether your lease authorized the specific denominator the landlord applied.

Legitimate anchor exclusion structure (from your perspective as an in-line tenant):

Your lease uses GLA in the pro-rata definition
The anchor exclusion is mentioned elsewhere in the lease or a lease amendment
The denominator in your reconciliation matches GLA (includes anchor SF)
The anchor simply doesn't contribute to the CAM pool, that's the anchor's deal, not yours

In this case, you're paying your correct GLA-based share of the full CAM pool. The fact that the anchor pays nothing is the landlord's economic arrangement with the anchor, not your obligation.

Problematic anchor exclusion structure:

Your lease uses GLA in the pro-rata definition
The landlord calculates your pro-rata share using GLOA (a denominator that excludes the anchor)
You end up with a higher percentage than your lease specifies
The difference between your GLA percentage and the GLOA percentage is the overcharge

What courts have held

Texas appellate courts applying the plain-language rule have consistently held that when a lease defines the pro-rata denominator as GLA, the landlord cannot substitute GLOA or any other smaller measure without an amendment. The Shopping Center Law Outline (International Council of Shopping Centers) identifies denominator substitution as one of the five most litigated CAM provisions in retail leases. Courts presented with a GLA-defined lease and a reconciliation using a smaller denominator have ordered recalculation using the contractual definition, with refunds for all open reconciliation periods.

The principle applies regardless of which party the tenant is, which state the property is in, or how the anchor exclusion came to exist. The controlling question is always what the lease says the denominator should be.

What to Do If You Suspect an Anchor Exclusion Error

Step 1: Locate your pro-rata definition and write down the denominator specification.

Step 2: Pull the most recent reconciliation and find the denominator used (often in a footnote or the methodology summary on the last page).

Step 3: Compare. If the reconciliation denominator is smaller than your lease's definition requires, you have the basis for an audit request.

Step 4: Calculate the overcharge. Apply your lease's correct denominator to the total CAM pool each year. The difference between the correct amount and what you paid is the overcharge per year. Multiply by the lookback period to get the recoverable amount.

Step 5: Send a written audit request under your lease's audit rights clause. The request should ask for the landlord's pro-rata calculation worksheet and the current rent roll showing all tenant square footages.

Run a free audit on your retail CAM charges, the analysis extracts your pro-rata definition from the lease and compares it against the denominator in the reconciliation automatically.

"The anchor exclusion denominator swap is the most predictable overcharge in shopping center leases. A landlord's reconciliation can look perfectly correct while hiding a $25,000 annual overcharge. The denominator line is the only place it shows up, and most tenants never look at it." —

Anchor Exclusion: Common Questions

If the anchor exclusion is in my lease, does that mean I agreed to the GLOA method?

Only if your lease explicitly says that the pro-rata denominator excludes anchor tenants or uses GLOA. Many leases include anchor exclusion language in the anchor tenant's side of the deal, which doesn't automatically change your lease's denominator definition. Read your own lease's pro-rata definition, not just the center-wide exclusion provisions.

What if the anchor moved out mid-year? Does the denominator change?

This depends on your lease's pro-rata definition. Under GLA, the anchor's space remains in the denominator even if vacant (because GLA is the total leasable area, not the occupied area). Under GLOA, a vacancy reduces the denominator and inflates occupied tenants' shares. If the anchor leaves and the denominator suddenly shrinks, check whether your lease authorizes that adjustment.

Can I negotiate out of a GLOA denominator if I'm signing a new lease?

Yes. Insist on a GLA denominator. Most in-line tenants in anchored centers with real bargaining power can negotiate GLA definitions, because the difference compounds over a 5–10 year lease term. A GLOA clause in a 10-year lease at a center with a 15% anchor exclusion can cost six figures in overcharges at a mid-size retailer scale.

How common is this error?

The anchor exclusion denominator issue appears regularly in CAM disputes. The Shopping Center Law Outline (International Council of Shopping Centers) identifies it as one of the top five disputed CAM provisions in retail leases. Any in-line tenant in a center with a non-contributing anchor should verify which denominator their lease requires.

Related Resources

Sources

CAMAudit is a document analysis and automation tool. The analysis described on this page does not constitute legal advice. Consult a licensed attorney before sending any legal correspondence to your landlord.

Frequently Asked Questions

What is an anchor tenant exclusion and how does it affect my CAM bill?

An anchor exclusion is a negotiated provision that exempts a major tenant, typically a grocery store, department store, or big-box retailer, from contributing to the shared CAM pool. When an anchor covering 40% to 60% of the center's GLA pays nothing, the remaining in-line tenants absorb 100% of costs. This directly inflates every in-line tenant's effective cost per square foot.

Is the anchor exclusion disclosed to in-line tenants?

Generally no. The anchor's lease is a separate agreement, and landlords are not required to share its terms with other tenants. In-line tenants typically learn of the exclusion only when they receive their pro-rata calculation and notice that their percentage seems higher than expected based on the building's total size.

How much can anchor exclusion inflate my CAM bill?

The math is straightforward. If an anchor holds 40% of GLA and is fully excluded from the pool, the remaining in-line tenants pay 100% of costs spread across 60% of the space. A tenant who should represent 5% of total GLA now effectively pays 8.3% of total costs, a 66% increase. On a $100,000 CAM pool, that is an additional $3,300 annually for one in-line tenant at 5% of remaining space.

Can I dispute a CAM bill that includes anchor exclusion inflation?

You can dispute if the anchor exclusion was not properly disclosed in your lease or if the denominator calculation method your lease specifies produces a different result. Some leases define pro-rata as your SF divided by total GLA of all occupied tenants, which would require the anchor to be in the denominator even if excluded from the pool. Review your exact pro-rata definition.

What should I look for in my lease to understand anchor exclusion impact?

Check the pro-rata share definition: does it use total GLA, total occupied GLA, or GLA of contributing tenants only? If your lease uses total GLA as the denominator but the anchor's SF is excluded from the denominator when calculating your share, that is the anchor exclusion at work. Request the landlord's denominator calculation and the current rent roll to verify.