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Recovery of past CAM overcharges depends on your specific lease terms, including any audit rights deadlines or ‘binding and conclusive’ provisions, and on applicable state law.

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Percentage Lease: CAM Audit Guide

Last updated: May 2026

By Angel Campa, Founder

Percentage Lease tenants face specific billing risks tied to how expenses are allocated and reconciled. The most common error appears in the section below. CAMAudit runs 20 forensic detection rules on your reconciliation statement to identify every recoverable dollar.

Most Common Overcharge

Landlords calculating percentage rent using an inflated definition of "gross sales", one that includes employee discounts, sales tax collected, returns, inter-company transfers, or e-commerce sales that were not fulfilled from the demised premises. Each improperly included category inflates the gross sales figure and results in the tenant paying more percentage rent than contractually required.

What Is a Percentage Lease?

A lease structure, most common in retail, where the tenant pays a base rent plus additional "percentage rent" equal to a percentage of their gross sales above a defined breakpoint. The percentage rent component is designed to allow landlords to participate in the upside of successful retail operations. The underlying lease structure (the fixed rent component) is typically NNN.

Percentage Lease Expense Pass-Throughs

Depends on the underlying lease structure, which is typically NNN (tenant pays taxes, insurance, and CAM in addition to base rent and percentage rent). Percentage rent is layered on top of the base lease expense structure, it is an additional revenue-sharing component, not a substitute for operating expense obligations.

Percentage Lease CAM Calculation & Billing

Two components: (1) Standard NNN/CAM expenses billed and reconciled on a pro-rata share basis identical to any NNN lease, and (2) Percentage rent billed separately after the tenant's gross sales exceed the "natural breakpoint" (base rent divided by the percentage rent rate). Percentage rent is typically calculated annually, though some leases require monthly interim payments.

Red Flags to Watch

  • ▶Percentage rent calculated monthly instead of annually (over-captures seasonal peaks)
  • ▶Gross sales definition that does not exclude returns, sales tax, and employee discounts
  • ▶Breakpoint set below the natural breakpoint (base rent ÷ percentage rate)
  • ▶E-commerce or warehouse sales included in gross sales without store fulfillment
  • ▶Landlord requesting gross sales reports but not providing a reconciliation methodology
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Check Your Percentage Lease for These Overcharges

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Audit Focus

Audit the landlord's definition of "Gross Sales" against the lease's specific definition. Verify that all exclusions in the lease (returns and allowances, sales tax, employee discounts, online sales not delivered from the store) are actually being deducted. Confirm that the breakpoint calculation uses the correct formula, base rent divided by the percentage rate (natural breakpoint), rather than an artificial breakpoint set below the natural one.

Common Industries

  • →Shopping mall retailers
  • →QSR / fast casual restaurants
  • →Specialty retail chains
  • →Grocery-anchored center tenants
  • →Entertainment venues

Explore Other Lease Types

Triple Net Lease (NNN)Double Net Lease (NN)Single Net Lease (N)Modified Gross LeaseFull Service Gross Lease (FSG)Absolute Net LeaseGround LeaseIndustrial Gross LeaseRetail LeaseOffice LeaseMedical Office LeaseRetail Net Lease (NNN Retail)Flex Space LeaseBondable Net Lease
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Don't Overpay on Your Percentage Lease

Upload two PDFs. 20 detection rules. Under 15 minutes. Free.

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Related Guides

CAM OverchargesGuide
Percentage Rent Breakpoint Errors: The $12,000 Miscalculation
Lease LanguageOverview
Percentage Lease Audit Rights: What Tenants Can Verify and How

Explore Related Resources

Tenant TypeCoffee Shop & CafeTenant TypeApparel StoreLease ClauseCo-Tenancy ClauseLease ClausePercentage Rent ClauseLease TypeTriple Net Lease (NNN)Lease TypeRetail Net Lease (NNN Retail)

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Related Resources

ResourcesCAM Audit by Tenant TypeToolsFree CAM Audit ToolsGlossaryCAM GlossaryToolsPro-Rata Share Calculator

Related Articles

  • Percentage Lease Audit Rights
  • Percentage Rent Audit Guide
  • Percentage Rent Breakpoint Errors

Frequently asked questions

Need to extract lease terms before your audit?

A CAM audit is only as accurate as your lease data. lextract.io extracts 126 structured fields from any commercial lease PDF: CAM definitions, pro-rata share, caps, base year, and audit rights. So you have the exact terms your landlord is supposed to follow.

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This 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.