5 CAM Reconciliation Mistakes That Cost Tenants Thousands in 2026

Every year, commercial tenants receive CAM reconciliation statements from their landlords. Most tenants pay them without question. That is a costly habit. I built CAMAudit after watching reconciliation after reconciliation come back with the same categories of errors, and I wanted a repeatable way to catch them.

Here are the five mistakes our detection engine flags most often, and what each one typically costs.

1. Management Fee Overcharge

Your lease specifies a management fee cap, often expressed as a percentage of gross revenues or base rent, commonly 3-5%. Landlords sometimes apply that percentage to a base that includes items the lease excludes, or apply a higher rate than the lease permits.

When our tool detects a management fee line, it extracts the rate from your lease and compares it to what was billed. A 1% overcharge on a $2 million property can mean $20,000 added to your annual bill.

What to do: Pull your lease's CAM exhibit. Find the management fee cap clause. Compare the stated rate to the billed amount divided by the eligible expense base.

2. Pro-Rata Share Error

Your pro-rata share is your rentable square footage divided by the total rentable area of the property. Errors here multiply across every CAM line item because they affect the allocation of all shared costs.

Common errors include:

• Using the wrong denominator (a partial occupancy figure instead of total leasable area)
• Applying a different square footage than your lease states
• Failing to update after a major tenant departure or addition that your lease says should trigger recalculation

Even a small denominator error compounds across multiple expense categories. On a $150,000 annual CAM bill, a 3% pro-rata error is $4,500 per year.

3. Excluded Services Billed as CAM

Most leases contain an exclusions list: categories of expenses your landlord cannot pass through to tenants. Common exclusions include capital improvements, the landlord's income taxes, depreciation on the building shell, and leasing commissions.

CAMAudit's excluded service detection uses AI classification to flag line items that match common exclusion categories in your lease. This is one of the errors that is hardest to catch manually because the line item descriptions can be vague.

What to do: Request a detailed backup for any line item you cannot clearly map to an allowable CAM category. Vague descriptions like "building improvement" or "administrative costs" warrant scrutiny.

4. Gross-Up Violation

If your lease includes a gross-up provision, variable operating expenses are supposed to be adjusted to what they would have been at a specified occupancy level, often 95%. This protects tenants in partially occupied buildings from absorbing a disproportionate share of variable costs.

The violation happens when:

• The landlord grosses up fixed costs that should not be adjusted (insurance premiums, property taxes)
• The gross-up percentage differs from what the lease specifies
• Gross-up is applied in a year where occupancy already exceeded the threshold

5. CAM Cap Exceeded

CAM caps limit how much your CAM charges can increase year-over-year, often 3-5% per year compounded. Once a cap is in your lease, exceeding it is a straightforward breach, but catching it requires comparing the current year's bill to the base year and every year in between.

The complexity increases when:

• The cap is cumulative (unused cap room carries forward)
• The cap excludes certain categories like taxes and insurance
• The landlord applies the cap to net charges after exclusions rather than gross charges

Our system extracts the cap rate, base year, and applicable expense categories from your lease, then runs the math deterministically. If the billed amount exceeds the cap calculation, the system flags the exact overage.

What to Do If You Spot Any of These

The first step is documentation. Pull the reconciliation statement, your lease, and the prior year's statement if you have it. Note every discrepancy with specific dollar amounts.

Then, consider your audit rights window. Most leases give you 12 to 24 months from receiving the reconciliation to formally dispute it. Miss that window and you typically lose the right to challenge that year's charges.

CAMAudit automates the detection step. Upload your lease and reconciliation statement, and our 13 detection rules will flag every issue, calculate the dollar impact, and generate a dispute letter draft you can send to your landlord.