The anchor left. Maybe it was a department store in a regional mall. Maybe it was the office tenant who filled three floors of a mixed-use building. Maybe it was the grocery store that drove foot traffic to a strip center.
Whatever the building, a client comes to your firm with a strange result. Their CAM charges went up after the anchor left, not down. The anchor used more of the parking lot, more of the HVAC, more of everything. How does the building cost more to run with fewer tenants in it?
The answer sits in how the lease defines the denominator used to calculate pro-rata share, and whether the landlord used the right one. This is the check to run before your team signs off on the reconciliation.
What an Anchor Tenant Is and Why the Departure Matters
An anchor tenant is usually the largest occupant in a property, by square footage, by foot traffic, or both. In retail, anchors (grocery stores, big-box retailers, department stores) draw the traffic that benefits the smaller tenants around them. In office buildings, the anchor might hold 40 to 60% of the leasable space. In mixed-use buildings, it is often the ground-floor retail anchor whose lease was structured to subsidize the rest of the property.
When an anchor leaves, several things happen at once:
- Total occupied square footage drops
- The landlord keeps operating the property: lighting, HVAC, landscaping, parking lot maintenance, security
- The property may market to replace the anchor for months or years
- Remaining tenants keep paying, sometimes more than before
The question your firm needs to answer for the client: is that increase legitimate under the lease, or is it cost-shifting the lease does not allow?
The Denominator Problem
A tenant's CAM share is a fraction: their square footage divided by some measure of the total property. Change the denominator, and the share changes.
Leases use one of two versions.
Total leasable area (TLA). The tenant's share is their square footage divided by the total leasable square footage, whether the building is 95% occupied or 40% occupied. A 5,000-square-foot tenant in a 200,000-square-foot property pays 2.5%, full building or half-empty.
Occupied leasable area. The tenant's share is their square footage divided by the square footage of all currently occupied units. Same 5,000-square-foot tenant, but the denominator shrinks as vacancy rises. If occupancy drops to 100,000 square feet, that tenant's share jumps from 2.5% to 5%.
The second version is what causes CAM bills to spike when an anchor leaves. Costs stay roughly flat. The denominator shrinks. Every remaining tenant's percentage share climbs, sometimes sharply.
Whether the landlord can use the occupied-area denominator depends on the lease language. Many leases specify total leasable area, which protects the tenant from this kind of cost-shifting. Others permit or even require recalculation based on occupancy. Some are ambiguous, and ambiguity in a landlord-drafted lease tends to get read in the landlord's favor unless someone challenges it.
Lease Language That Protects the Client
Tenant-favorable language on this point usually looks like:
- "Tenant's pro-rata share shall be calculated by dividing the rentable square footage of the Premises by the total rentable square footage of the Building, whether or not any portion thereof is occupied."
- "In no event shall Tenant's pro-rata share exceed X%."
- "The denominator used to calculate pro-rata share shall not be less than [percentage] of the total leasable area of the Property."
Any of these caps the landlord's ability to shift costs onto remaining tenants when vacancy rises.
Lease Language That Leaves the Client Exposed
Language that works against the tenant in anchor-departure scenarios includes:
- "Tenant's pro-rata share shall be calculated based on occupied leasable area from time to time."
- "Landlord may adjust Tenant's pro-rata share based on changes in occupancy."
- Any clause allowing the landlord to gross up CAM charges to a stated occupancy level (often 95%), which is meant as a tenant protection but can be misapplied after an anchor leaves.
Occupied-area language does not automatically mean the landlord can charge without limit. Many leases with that language still cap the tenant's share or require the landlord to make a reasonable effort to re-lease the anchor space. Whether those conditions are met is a factual question your firm can check.
Gross-Up Violations After an Anchor Departure
The gross-up provision is supposed to protect the tenant in exactly this situation. The idea: if variable costs like HVAC would naturally run lower in a less-occupied building, the landlord should not underprovide services during vacancy and then bill as if the building were full.
Gross-up lets the landlord adjust variable costs upward to what they would have been at a stated occupancy level, so the per-square-foot cost stays stable as occupancy moves.
After an anchor departure, gross-up can create a new problem in three ways:
Grossing up fixed costs. Property taxes, insurance, and some structural expenses do not change with occupancy. Applying a gross-up adjustment to these costs inflates the total past what the provision authorizes.
Wrong occupancy base. If the building drops to 60% occupancy after the anchor leaves, gross-up should adjust variable costs to reflect the lease-stated threshold, often 95%. If the landlord uses actual 60% occupancy instead, or counts the anchor's space as occupied while grossing up variable costs, the math favors the landlord.
Gross-up applied below the trigger. Some leases only permit gross-up when occupancy falls below a stated threshold. If the building was at 92% before the anchor left and dropped to 75% after, but the threshold is 90%, gross-up may not be authorized until that point.
These calculations need the lease's specific gross-up language, the actual occupancy at each reconciliation, and which cost categories the provision covers. This is exactly the kind of error that never shows up on the face of a reconciliation statement.
A Pattern Your Firm Will See Again
Here is a pattern that shows up in file after file. A retail tenant occupies 3,800 square feet in a strip center anchored by a grocery store. The grocery store's lease carried below-market rent in exchange for traffic. When it vacates, the landlord keeps operating the center and markets heavily to fill the 28,000-square-foot anchor space.
During the first full year of vacancy, the remaining tenant's CAM charges rise by about 40%. The landlord's stated reason is the occupancy-based denominator. But the reconciliation also includes a gross-up applied to property taxes, which do not vary with occupancy. That piece alone accounts for several thousand dollars of unjustified charges.
This is not unusual. It is a multi-layer error that is hard to catch without running the math against the specific lease language.
What Your Firm Should Check
If an anchor tenant in a client's building has recently left, pull the lease and check these provisions before the next reconciliation lands:
- Pro-rata share definition. Does it use total leasable area or occupied area as the denominator?
- Gross-up clause. What costs does it cover? What occupancy threshold triggers it? Is it applied to costs that should not move with vacancy?
- Exclusions from CAM. Is the landlord charging tenants for its own cost to market and re-lease the anchor space? That typically should not appear in CAM.
- Cap provisions. If the lease includes a CAM cap, has it been breached after the anchor departure?
- Anchor co-tenancy provisions. Some leases give tenants remedies, a rent reduction or an early termination right, if a named anchor vacates. Check whether the client has one.
How CAMAudit Flags These Issues
I built CAMAudit with anchor-departure scenarios in mind, because these errors are structural, not obvious. They live in the relationship between the reconciliation statement and the lease language, not in the statement alone.
Route the file through CAMAudit and it checks the pro-rata share calculation against the denominator the lease specifies, flags gross-up applied to excluded cost categories, catches management fee overcharges that often compound when a larger cost pool follows an anchor departure, and compares year-over-year CAM changes against the lease's cap provisions.
The tool does not replace your firm's read of the lease. It identifies where the numbers do not add up, so your team knows which provisions to check first.
What Your Firm Can Do for the Client
If a client's CAM charges increased after an anchor departure, run this sequence:
- Invoke the client's audit rights. Request the supporting documentation for the reconciliation year: the occupancy schedule the landlord used, the cost pool breakdown, gross-up calculations, and the management fee basis.
- Run the math against the lease. Check whether the denominator matches the lease definition. Check whether gross-up applied only to eligible variable costs. Check whether any pooled cost is excluded by the lease.
- Prepare a dispute letter draft. Document the specific discrepancies, the lease provisions they violate, and the dollar amount. This is a draft for your review, not legal advice; have counsel review it before it goes to the client or the landlord.
- Advise the client to pay under protest, not withhold rent, while the dispute is open.
Most landlords, shown a specific, documented calculation error and the lease language behind it, would rather issue a credit than litigate.
"The anchor leaving is when everything gets recalculated, and recalculation is when errors get introduced. Firms with clients in buildings that lost an anchor recently should be running the audit now, not waiting for renewal." - Angel Campa, Founder of CAMAudit