How much do commercial tenants typically overpay in CAM charges?

Industry surveys consistently show that 30 to 50 percent of NNN CAM reconciliations contain at least one billing error. The average overcharge varies widely by property size and type: small retail tenants might overpay $2,000 to $8,000 per year; larger commercial tenants can overpay $20,000 to $100,000 or more annually. The longer the error goes undetected, the larger the cumulative loss.

Can I go back and audit prior years if I have never audited before?

Yes, for any reconciliation year still within your lease audit rights window, which is typically 12 to 36 months after the reconciliation was delivered. If you have never audited, start with the most recent years and work backward before the earlier windows close. CAMAudit can scan multiple years in sequence to identify which reconciliations have violations.

From Ignoring CAM Charges to Proactive Auditing

Most commercial tenants pay CAM reconciliations without ever checking the math. The cost of not auditing compounds year over year: a billing error that goes undetected for five years costs you five years of overpayments, all of which may have been recoverable if disputed within the audit rights window. CAMAudit makes it practical to check every reconciliation before paying.

Cost: No Audit

$4,000 to $50,000 or more in undetected overcharges annually

Cost: Proactive CAM Audit

$199 flat-fee audit

Recover overcharges that compound year over year

Time to Results: No Audit

Not applicable (never audited)

Time to Results: Proactive CAM Audit

First audit results in 5 minutes

No Audit vs. Proactive CAM Audit

Dimension	No Audit	Proactive CAM Audit
Annual overcharge detection	None: errors remain undetected indefinitely	All 13 detection rules run on every reconciliation
Compound overcharge cost	Errors repeat every year and accumulate over the lease term	Errors caught in year one stop repeating in future years
Audit rights window usage	Window expires unused for every reconciliation year	Each year audited before the window closes
Dispute leverage	None: no documentation of errors, no formal objection	Documented findings report with specific lease citations
Lease renewal negotiation position	No data on billing error patterns to use in negotiation	Multi-year audit history to use as leverage in lease renewal discussions
Time investment	0 hours spent, but significant financial exposure	5 minutes per reconciliation cycle to upload and run the scan

What You Keep

✓Your lease terms and any caps or exclusions you negotiated remain in force whether or not you audit
✓Your right to submit a dispute within the audit rights window for any reconciliation you have not yet reviewed
✓Your existing landlord relationship, which typically survives a professionally submitted dispute

What Changes

→Billing errors are caught in the year they occur rather than accumulating undetected
→You have a documented audit trail for each reconciliation year
→Your audit rights window is actually used rather than expiring unused
→Lease renewal negotiations are informed by a historical record of billing compliance

More Switching Guides

From Manual CPA Audit to CAMAudit From Spreadsheet Tracking to Automated CAM Audit From In-House Lease Admin Review to CAMAudit From Traditional Audit Firm to AI-Powered CAM Audit

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Frequently asked questions

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.