CAM Reconciliation Dispute Deadlines: What Tenants Need to Know

When you receive a CAM reconciliation statement, you don't have unlimited time to review it. Most commercial leases define an audit window — a specific number of days after delivery during which you can dispute charges. Miss that window and you may lose the right to challenge the bill even if it clearly contains errors.

This is not theoretical. Courts in California, Texas, New York, Florida, and Illinois have all applied the "account stated" doctrine — which treats a rendered statement as accepted by the debtor if the debtor fails to object within a reasonable time. In a commercial lease context, this doctrine can function as a hard deadline on your ability to dispute a CAM reconciliation.

The account stated doctrine and why it matters

The account stated doctrine is a common law principle that dates back centuries. The basic concept: if a creditor renders a statement of account, and the debtor retains the statement without objecting within a reasonable time, a court may treat the debtor as having agreed to the amount owed.

Applied to CAM reconciliations, this means:

• If you receive a reconciliation showing $25,000 owed
• You pay without objecting in writing
• Time passes without any formal dispute
• A court might later treat that $25,000 as an agreed-upon account balance — even if the reconciliation contained improper charges

The key cases by jurisdiction:

California: Zinn v. Fred R. Bright Co., 271 Cal.App.2d 597 (1969), establishes that failure to object within a reasonable time implies agreement. California also has a new statutory protection for "qualified commercial tenants" under Civil Code § 1950.9 (effective January 1, 2025), which requires landlords to provide documentation within 30 days of a written request and imposes an 18-month lookback on previously incurred costs.

Texas: Dulong v. Citibank (South Dakota), N.A., 261 S.W.3d 890 (Tex. App.—Dallas 2008), describes the account stated doctrine and the inference of agreement from retained statements without objection. Texas statute of limitations for breach of written contract is 4 years (Tex. Civ. Prac. & Rem. Code § 16.004(a)).

New York: Stephan B. Gleich & Assoc. v. Gritsipis (App. Term 1st Dep't 2011) states that retaining billing statements and failing to object within a reasonable time implies agreement. New York's contract statute of limitations is 6 years (CPLR § 213(2)).

Florida: Robert C. Malt & Co. v. Kelly Tractor Co., 518 So.2d 991 (Fla. 4th DCA 1988), recognizes the objection-within-reasonable-time requirement. Florida's statute of limitations for written contract actions is 5 years (Fla. Stat. § 95.11(2)(b)). Note: Florida Statute § 95.03 prohibits contractual provisions that shorten the time to sue below the applicable statute of limitations.

Illinois: Illinois courts recognize the account-stated doctrine under which retaining a billing statement beyond a reasonable time without objection can establish an agreed account balance. Illinois has a 10-year statute of limitations on written contracts (735 ILCS 5/13-206) — the longest of any major commercial leasing state.

The contractual audit window

No state imposes a universal statutory deadline on commercial CAM reconciliation delivery or tenant audit rights. The timing is set by the lease.

Common audit window provisions:

• 30 days from delivery: Aggressive, and uncommon except in landlord-drafted leases where the landlord tried to limit exposure
• 60 days from delivery: Common in standard landlord-form leases
• 90 days from delivery: Frequently negotiated by tenant counsel
• 120–180 days from delivery: Tenant-favorable; allows sufficient time for a professional audit

Published escalation commentary recognizes that tenants sometimes need up to 180 days to route reconciliation statements internally and complete a review with outside counsel or a CPA.

The audit window in your lease is a hard contractual deadline. Missing it can be treated as acceptance of the statement under account-stated principles — and a court's application of that doctrine can be independent of the statutory limitations period.

What to do when you receive a reconciliation

Immediately: Note the delivery date in writing and calculate your audit deadline. If the lease says "60 days from receipt," that clock starts today.

Within the first week: Do a preliminary review. Check the summary against your monthly estimates. Look for obvious anomalies: unusually large line items, categories that seem off, a pro-rata share that looks higher than your percentage of the building.

Before the deadline: If you haven't completed your full review, send written notice of your intent to dispute or audit, even if you haven't identified specific errors yet. This preserves your rights while you continue reviewing. The notice should go to the landlord or property manager in writing, with confirmation of receipt.

If you find specific errors: Follow up with a formal dispute notice identifying each disputed line item, the dollar amount you believe is incorrect, and the lease provision supporting your position.

Statutory deadlines vs. contractual deadlines

These are different and both matter.

Contractual audit window: The deadline in your lease to dispute a reconciliation. Missing this can result in account-stated treatment — you may lose the right to challenge even legitimate errors.

Statutory limitations period: The period during which you can file a lawsuit for breach of the written contract. These range from 4 years (Texas, California) to 10 years (Illinois). The statutory period is the outer boundary on litigation — but a court may apply account-stated principles to cut off practical recourse much sooner.

California exception: Civil Code § 1950.9 (effective January 2025) applies to "qualified commercial tenants" — generally tenants with lease terms under 5 years or gross revenues below $5 million, depending on the lease execution date. For covered leases, the statute requires landlords to provide CAM documentation within 30 days of written request and bars charges for costs incurred more than 18 months before billing.

How to preserve your dispute rights

Check your lease for the audit window length. It's usually in the CAM section under "Tenant's Audit Rights," "Reconciliation," or "Operating Expense Escalation."

Put your dispute in writing, with a date. Oral objections are difficult to prove. Email with read-receipt or certified letter establishes the date and content of your notice.

Be specific when possible. "I dispute this reconciliation" is weaker than "I dispute the $18,000 management fee line item on the grounds that it exceeds the 4% cap specified in Section 7(b) of the lease."

Don't wait for a professional audit to protect your rights. You can send a preliminary written notice of dispute before completing a full audit. The notice preserves your position while you gather information.

Understand that paying doesn't waive your rights automatically. In most lease structures, paying a reconciliation while simultaneously objecting in writing preserves your dispute rights. Paying in full with no objection is riskier — review your specific lease language.

Frequently Asked Questions

What is the typical dispute window for a CAM reconciliation?

There's no universal standard. Most landlord-drafted leases include 30–60 day windows. Tenant counsel routinely negotiates for 90–180 days. The window specified in your lease is what controls.

Does paying a CAM reconciliation waive my right to dispute it?

Paying in full without any written objection increases the risk that a court applies account-stated principles to treat the bill as accepted. Paying while simultaneously submitting a written dispute generally preserves your rights. Review your specific lease language on this point — some leases contain provisions that explicitly address whether payment waives audit rights.

What happens if the landlord sends the reconciliation late?

If your lease requires delivery within a specific time period (e.g., "within 120 days of year-end") and the landlord delivers it late, the landlord may be in default of the lease. The late delivery may also reset your audit window — an argument that your window starts from actual delivery, not from the contractual delivery deadline. Consult lease counsel if you receive a significantly late reconciliation.

Can I dispute a reconciliation from a prior year?

Possibly, depending on how much time has passed. The contractual audit window in your lease and any account-stated arguments are the main constraints. If you're within the statutory limitations period (4–10 years depending on state), a contract-based claim may still be viable — but the longer you wait, the stronger the landlord's account-stated argument becomes. Consult a commercial real estate attorney before pursuing prior-year claims.

What documentation should I request as part of a CAM audit?

Request the full general ledger for all CAM pool accounts for the year being disputed, vendor invoices for the largest expense line items, the management fee calculation showing the base used and the rate applied, the pro-rata share calculation with the denominator breakdown, and any gross-up worksheets if applicable. In California for qualifying commercial tenants, Civil Code § 1950.9 requires delivery within 30 days of written request.

For context on how the full CAM billing cycle works, see what is a CAM reconciliation statement. For a systematic approach to reviewing a reconciliation before the deadline, read how to read a CAM reconciliation statement. For the full NNN lease overview, see the NNN Lease Tenant Guide.

Approaching an audit deadline? Run a free CAM scan to identify specific issues before your time runs out.