Estimates are monthly prepayments based on projections. Actuals are real expenses verified at year-end. The gap between them is where true-up errors hide.
Estimated CAM charges are monthly prepayments based on the landlord's projection of annual operating expenses. Tenants pay one-twelfth of the estimated annual amount each month, providing the landlord cash flow to cover expenses as they occur throughout the year.
Actual CAM charges are the real operating expenses incurred by the landlord during the year. The annual reconciliation compares total actual expenses against total estimated payments to determine whether the tenant underpaid or overpaid, resulting in a true-up adjustment.
| Dimension | Estimated CAM Charges | Actual CAM Charges |
|---|---|---|
| When costs are known | Beginning of year (projected) | After year-end (reconciled) |
| Payment timing | Monthly installments throughout the year | Year-end true-up adjustment |
| Accuracy | Approximate, based on projections | Exact, based on incurred costs |
| Cash flow impact | Predictable monthly outflow | Potentially large one-time adjustment |
| Audit focus | Check if estimates are inflated vs. prior actuals | Verify each line item against lease terms |
The gap between estimated and actual CAM charges is where true-up errors occur. Landlords who consistently overestimate collect excess cash throughout the year and may not credit the full overpayment back during reconciliation. Conversely, underestimates produce large year-end bills that catch tenants off guard. Both the estimate basis and the true-up calculation are auditable.
Systematically inflated estimates are worse because they function as an interest-free loan from the tenant to the landlord. If the landlord overestimates by 15% on a $100,000 annual CAM charge, the tenant has $15,000 in excess payments earning zero interest for up to a year before reconciliation. Combined with true-up errors, this can become a significant ongoing overcharge.
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Find My OverchargesThis page provides general educational information. It is not legal advice and may not reflect the most current law in your state. Consult a licensed attorney for advice specific to your situation.
