How to Separate Controllable and Uncontrollable CAM Expenses
The classification process and worked example for segregating cap-eligible controllable expenses from pass-through uncontrollable expenses.
Controllable CAM expenses are operating costs the landlord can actively manage and limit — typically maintenance, janitorial, landscaping, and property management fees — while uncontrollable expenses (property taxes, insurance, utilities, and government-mandated costs) are excluded from CAM caps because the landlord cannot constrain their growth. This distinction is the foundation of any lease containing a CAM cap: caps apply only to the controllable pool, not to total CAM. If a landlord applies the cap to total CAM including uncontrollables, they understate tenant recoveries. Conversely, failing to apply the cap to controllables results in overbilling. Correctly segregating the two categories requires reading the lease's definition of 'Controllable Operating Expenses' and mapping each GL account to the appropriate category — the same expense (e.g., janitorial) may be controllable in one lease and excluded from the cap in another.
Formula
CAM Cap applies to: Total CAM − Uncontrollable Expenses = Controllable Expense Pool Total Billing = MIN(Controllable Pool × PRS, Cap Ceiling) + (Uncontrollable Pool × PRS)
Variables
| Name | Symbol | Definition | Example |
|---|---|---|---|
| Total CAM Expenses | TCE | Total actual recoverable operating expenses after all exclusions have been removed, before any cap or gross-up adjustment. | $400,000 total CAM after exclusions |
| Uncontrollable Expenses | UCE | Expenses the landlord cannot meaningfully control — typically defined in the lease to include real estate taxes and assessments, building insurance premiums, utility costs for common areas, costs to comply with laws and regulations enacted after the lease date, and sometimes snow removal. These pass through at actual cost without cap limitation. | $170,000 uncontrollable (taxes $80K, insurance $30K, utilities $60K) |
| Controllable Expenses | CE | Expenses the landlord controls through management decisions — typically maintenance, janitorial, landscaping, security, management fees (up to any cap), and general repairs. These are subject to the annual cap. | $230,000 controllable (janitorial $90K, landscaping $55K, maintenance $60K, management fee $25K) |
Step-by-Step Process (4 steps)
Review the Lease Definition of Controllable Expenses
Read the CAM provision and any addenda to find the exact definition of 'Controllable Operating Expenses' or its equivalent. Some leases list uncontrollable items explicitly (negative definition); others list controllable items. Note any items that are explicitly included or excluded from the cap. Obtain lease addenda and riders that may modify the standard definition.
Example:
Lease Exhibit C states: 'Controllable CAM Expenses means all Operating Expenses excluding: (i) Real Estate Taxes, (ii) insurance premiums, (iii) utility charges, and (iv) costs required by any governmental authority whose requirement was enacted after the Commencement Date.'
Map Each GL Account to Controllable or Uncontrollable
For each GL account in the recoverable CAM pool, assign it to either the controllable or uncontrollable category based on the lease definition. Create a mapping table that can be used consistently year-over-year. Flag any accounts that require judgment (e.g., elevator maintenance contracts — is this controllable or not?). Obtain a legal opinion or negotiate the classification for ambiguous accounts before billing.
Example:
GL 5110 — Janitorial Services: Controllable. GL 5120 — Landscaping: Controllable. GL 5200 — Property Taxes: Uncontrollable. GL 5210 — Property Insurance: Uncontrollable. GL 5220 — Common Area Electric: Uncontrollable. GL 5300 — General Maintenance: Controllable.
Segregate the Two Pools and Verify Totals
Sum the controllable GL accounts into the controllable pool and the uncontrollable accounts into the uncontrollable pool. Verify that the two pools sum to the total recoverable CAM pool (after exclusions). This verification step catches misclassified accounts.
Example:
Controllable pool: $230,000. Uncontrollable pool: $170,000. Total: $400,000. Matches net recoverable pool after exclusions. ✓
Apply the Cap to the Controllable Pool
For each tenant with a CAM cap, calculate the cap ceiling on the controllable pool and apply it. The uncontrollable pool passes through at actual, prorated by the tenant's share percentage. Add the two components together for the total tenant CAM billing.
Total Tenant CAM = MIN(Controllable Pool × PRS, Cap Ceiling) + (Uncontrollable Pool × PRS)
Example:
Controllable $230,000 × 10% = $23,000 vs. cap ceiling $22,000 → billed at $22,000. Uncontrollable $170,000 × 10% = $17,000. Total = $22,000 + $17,000 = $39,000.
Worked Example
Scenario
Retail tenant, 20,000 SF in 200,000 SF shopping center (10% share). CAM cap: 5% non-cumulative on controllable expenses. Prior year controllable billing: $21,000. Reconciliation year total CAM: $400,000.
Inputs
| Variable | Value |
|---|---|
| Total CAM Pool | $400,000 |
| Property Taxes | $80,000 (uncontrollable) |
| Property Insurance | $30,000 (uncontrollable) |
| Common Area Utilities | $60,000 (uncontrollable) |
| Total Uncontrollable | $170,000 |
| Total Controllable | $230,000 |
| Tenant Pro-Rata Share | 10% |
| Prior Year Controllable Billing (tenant) | $21,000 |
| Cap Ceiling (5%) | $21,000 × 1.05 = $22,050 |
Calculation
Controllable tenant share: $230,000 × 10% = $23,000 Cap ceiling: $21,000 × 1.05 = $22,050 $23,000 > $22,050 → cap binds → bill at $22,050 Uncontrollable tenant share: $170,000 × 10% = $17,000 Total tenant CAM: $22,050 + $17,000 = $39,050 Without cap: $23,000 + $17,000 = $40,000 Cap saves tenant: $950
Result:
Tenant is billed $39,050 for the year. The cap limitation on controllable expenses saves the tenant $950 compared to billing at actual. Document both the capped and uncapped amounts in the reconciliation statement so the tenant can verify the cap was applied.
Common Mistakes
Applying the CAM cap to total expenses including uncontrollables — this understates what the landlord can recover from uncontrollable expense growth.
Classifying management fees as uncontrollable when the lease includes them in the controllable category — management fees are typically capped at a percent of revenue and are controllable.
Using different GL account mappings for different tenants in the same building, creating inconsistencies in the total recoveries.
Changing the controllable/uncontrollable classification of an account mid-lease without tenant consent or lease amendment.
Failing to maintain the GL-to-category mapping table from year to year, causing reclassifications that create audit issues.
Treating snow removal as controllable in one lease and uncontrollable in another for the same property, creating irreconcilable recovery pools.
When to Use This Calculation
- In every annual CAM reconciliation for any tenant whose lease contains a CAM cap provision.
- When setting up a new property in the CAM billing system, to establish the GL account mapping for controllable vs. uncontrollable expenses.
- When a tenant's audit questions the cap calculation, to demonstrate the specific GL accounts classified in each category.
- When negotiating lease renewals with existing tenants, to disclose current controllable expense growth rates and project future cap impact.
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