Audit Window Rights in Commercial Leases — What Tenants Must Know

Most commercial leases give tenants a limited period of time — often 30 to 90 days — to dispute CAM and NNN charges after receiving a reconciliation statement.

These audit window rights determine whether tenants can challenge overcharges, incorrect allocations, or lease violations. Once the window closes, charges may become final — even if they were wrong.

🔒 Secure & confidential • No subscription • Takes 2 minutes

What Is an Audit Window?

An audit window is the time period defined in a commercial lease during which a tenant may review and dispute CAM reconciliation, operating expense allocations, tax pass-throughs, or insurance charges.

Audit windows typically begin when the landlord delivers the annual reconciliation statement. The clock starts then — not when the tenant notices a mistake.

Typical CAM & NNN Audit Deadlines

• 30 days after reconciliation delivery
• 60 days after statement receipt
• 90 days in more tenant-friendly leases
• Occasionally 120 days in negotiated agreements

If no written dispute is delivered within the stated timeframe, landlords often argue that charges are deemed accepted.

What Happens If the Audit Window Closes?

When the audit window expires, tenants may lose leverage to dispute CAM overcharges, allocation errors, or improper expense categories. Even clear mistakes can become difficult to reverse.

Because CAM and NNN charges recur annually, missed disputes compound over time — turning small errors into long-term financial exposure.