Gross-up applies only to variable expenses that scale with occupancy. Taxes, insurance, management fees, and capital items are fixed costs. Grossing them up is an overcharge. Here are the 8 exclusions.
Eight expense categories should never be grossed up in CAM billing: real estate taxes, insurance premiums, management fees, capital improvements, depreciation and reserves, lease-excluded expense categories, anchor tenant expenses, and administrative overhead or loaded fees. Grossing up any of these creates an overcharge because gross-up is valid only for variable costs that scale with occupancy.
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Find My OverchargesSee a sample report firstGross-up is a legitimate calculation that normalizes variable operating expenses to reflect what costs would be if the building were fully occupied. It exists to protect tenants from absorbing costs that should theoretically be spread across a fully-tenanted building.
Here is the mechanism: if a building is 70% occupied, the landlord pays janitors to clean only the occupied floors. If gross-up is applied correctly, the janitors' cost is divided by 70% to arrive at the "grossed-up" amount representing full-occupancy cost. Your pro-rata share is then calculated against that grossed-up total. This normalizes your share across years of varying occupancy, preventing you from overpaying in high-occupancy years because you were absorbing other tenants' share in low-occupancy years.
Gross-up is valid for expenses that have a direct, proportional relationship with occupancy. The more tenants in the building, the higher these costs are.
Examples of legitimately variable expenses that gross-up can apply to:
The rule: if removing tenants from the building would meaningfully reduce the expense, gross-up may apply. If the expense stays the same regardless of occupancy, gross-up does not apply.
Property taxes are assessed against the land and improvements at values determined by the taxing authority, not by how many tenants happen to be in the building. A 70% occupied building pays the same property tax bill as a 100% occupied building of identical value.
Grossing up property taxes would mean taking the actual tax bill, dividing it by the occupancy rate, and using the inflated figure as the tax passthrough base. On a $200,000 tax bill in a 70% occupied building, proper treatment is billing your pro-rata share of $200,000. Improper gross-up produces a $286,000 inflated base, overcharging tenants by $86,000 in the aggregate.
Why gross-up does not apply: The tax bill is fixed by the taxing authority. There is no relationship between occupancy and tax liability. The landlord owes the same amount whether the building is empty or full.
How to detect it: Request the property tax bill. Compare the billed amount against the actual assessment. If the billed amount is higher than the actual tax bill divided by the denominator, gross-up is being improperly applied.
Commercial property insurance is priced based on the insured property's value, location, construction type, and claims history, not on occupancy. A landlord pays essentially the same premium to insure a 60% occupied building as a 100% occupied building of the same size and value.
Grossing up insurance premiums inflates the base in exactly the same way as taxes: the actual premium gets divided by the occupancy rate, producing a larger pool that is then allocated to tenants by pro-rata share.
Why gross-up does not apply: The insurance premium is fixed by the carrier. Occupancy rate does not affect the premium. Tenants should pay their pro-rata share of the actual premium, period.
How to detect it: Request the insurance certificate showing the actual annual premium. Compare against the insurance passthrough amount. If the passthrough exceeds your pro-rata share of the actual premium, gross-up is the likely cause.
Management fees are typically calculated as a percentage of gross revenues or of the controllable operating expense pool. In either case, they already scale appropriately with the actual economics of the building. A 70% occupied building generates less gross revenue, so a percentage-of-revenue management fee is already lower.
Applying gross-up on top of a percentage-based fee means inflating the revenue base before applying the percentage, producing a management fee that represents what the landlord would earn at full occupancy rather than actual earnings. Tenants are paying for management services they are not receiving.
Why gross-up does not apply: Management fees scale with actual revenues or expenses. They are not fixed costs, and the landlord is not "providing management services" to vacant space the way a janitor cleans a floor.
How to detect it: Locate your lease's management fee provision. Calculate: management fee cap (%) × permitted base (your lease defines this) = maximum permitted fee. If the billed fee exceeds this, check whether gross-up is being applied to the fee calculation.
Capital improvements are one-time investments in property assets: new roofs, HVAC systems, parking lots, elevators. Gross-up only makes sense for recurring operating expenses that could theoretically be higher with more tenants. A new roof costs the same whether the building is empty or full.
More fundamentally, capital improvements should not be in the CAM pool at all in most leases. Grossing up an already-excluded expense category compounds the error.
Why gross-up does not apply: Capital costs are asset investments, not operating expenses, and they have no occupancy dependency.
How to detect it: Any capital line item appearing in the operating expense pool is already suspect. If that line item is also being grossed up, you have two separate overcharge issues.
Replacement reserves (funds set aside for future capital expenditures) and depreciation are accounting entries, not cash operating expenses incurred in the current period. They represent the allocation of capital cost over time, not actual services rendered to the building.
Whether and how reserves can be included in CAM depends entirely on the specific lease language. Most modern leases explicitly exclude reserves. In leases where reserves appear, grossing them up makes no sense because the reserve contribution is a fixed calculation, not a cost that varies with how many tenants are in the building.
Why gross-up does not apply: Reserves and depreciation are not occupancy-driven expenses.
Your lease's exclusion list defines expenses that the landlord specifically cannot recover through CAM. These typically include leasing commissions, tenant improvement costs, advertising and marketing, executive salaries, and legal fees for lease enforcement. If an expense is excluded from the CAM pool, it cannot be grossed up and included, either directly or indirectly through a grossed-up "base" that happens to include excluded items.
Why gross-up does not apply: Excluded expenses are excluded. The calculation method (gross-up or otherwise) is irrelevant once an expense is outside the permitted pool.
In multi-tenant retail properties, anchor tenants (major department stores, big-box retailers) typically negotiate separate lease terms, including exclusions from certain CAM pools or separate maintenance obligations. Expenses attributable to the anchor tenant's use, or expenses the anchor tenant contractually refuses to share, should not be grossed up and spread to other tenants.
Why gross-up does not apply: These expenses belong to a specific tenant arrangement. Grossing them up to spread them across the remainder of the tenant mix violates the anchor tenant's lease terms and overcharges the remaining tenants.
Administrative overhead, supervisory fees, and "loaded" management fees (fees that embed salary, office, and overhead costs beyond actual property management) are either flat amounts or percentage-based calculations. None of these has a genuine relationship with occupancy that would justify gross-up.
Why gross-up does not apply: These are cost-allocation choices by the landlord, not costs that inherently vary with occupancy.
A 100,000 sq ft office building is 72% occupied. The landlord grosses up all operating expenses to 95% occupancy before allocating by pro-rata share.
| Expense | Actual Amount | Grossed-Up Amount (at 95%) | Overcharge |
|---|---|---|---|
| Real estate taxes | $280,000 | $370,526 (÷ 72% × 95%) | $90,526 |
| Property insurance | $85,000 | $112,153 | $27,153 |
| Management fee (4% of pool) | $18,600 | $24,568 | $5,968 |
| Capital amortization (improperly included) | $45,000 | $59,375 | $14,375 |
| Totals | $428,600 | $566,622 | $138,022 |
A tenant with a 5% pro-rata share would pay $28,331 instead of $21,430, an overcharge of $6,901 on fixed costs alone, for a single year. Over a 10-year lease term, this compounds to $69,010 for that one tenant.
CAMAudit's Rule 5 (Gross-Up Violation) runs a two-step check:
Expense classification: Identifies each expense in the CAM pool and classifies it as variable (occupancy-dependent) or fixed (occupancy-independent) based on the expense type and lease language.
Gross-up applicability check: Verifies that gross-up is applied only to variable expense categories. Flags any fixed expense (taxes, insurance, management fees, capital items) where gross-up has been applied.
When a violation is flagged, the finding includes the specific expense, the grossed-up amount billed, the permitted amount, and the calculated overcharge. The dispute letter draft cites the lease's gross-up provision and the calculation error.