CAM review vs. CAM audit: the scope distinction accounting firms need
A commercial tenant client tells your firm they want help with their CAM. CAM is common area maintenance, the shared costs a landlord passes to tenants. Your first question is simple. Does the client need a review or a formal audit? The two jobs share skills but produce different work on different timelines. Pricing them as the same work is one of the most common scoping mistakes I see in firms new to this practice.
I tested reconciliation samples from published audit cases through CAMAudit. Most disputes settle at the review stage, without a formal audit. Knowing when each scope fits helps the firm price right, set client expectations, and see where a review turns into an audit.
Lease audit rights provision: The clause in a commercial lease that grants the tenant the right to formally audit the landlord's underlying expense records supporting the CAM reconciliation. The provision typically specifies a dispute window (often 12 to 24 months from reconciliation receipt), the notice required to invoke the audit, the audit protocol, and how audit costs are allocated between landlord and tenant. Invoking audit rights is the formal mechanism for accessing landlord expense detail beyond what is shown on the reconciliation statement.
What a CAM review covers
A CAM review checks the reconciliation statement against the lease. It uses documents the tenant already has. The work names billing gaps and puts a dollar figure on each one. It does not need the landlord's underlying expense detail.
The review uses three documents. The signed lease with all amendments. The annual CAM reconciliation statement for the year under review. And the monthly CAM estimate invoices that set the running estimate the true-up adjusts.
The review runs compliance rules on the reconciliation. CAMAudit applies CAM detection rules. They cover operating expense definition, pro rata share, gross-up, the management fee, the controllable expense cap, and base year. Several rules also sort landlord overhead, insurance, taxes, and utilities. The output is a structured findings report.
The review ends with a recommendation: accept, ask for backup, or dispute. For most bills, the firm can advise on the review findings alone, with no formal audit.
The review prices cleanly as a fixed fee. The inputs are known. The method is set. The timing is in the firm's hands.
What a formal CAM audit covers
A formal CAM audit uses the lease's audit rights provision. It adds work the review skips: a look at the landlord's underlying expense records.
The audit uses the same documents as the review, plus the landlord's expense detail from the audit rights process. That detail usually includes general ledger extracts for the operating expense categories, vendor invoices for major items, and tax bills and insurance policies. With it, you can check that the reconciliation matches the landlord's actual costs.
The lease's audit rights protocol runs the audit. It usually requires written notice within a set window after the reconciliation arrives. It sets an audit period when the landlord must produce records. And it lays out how to report findings to the landlord and open settlement talks.
The audit finds more than the review. The expense detail lets you check categories the summary hides. It also backs findings with stronger proof, since the records support the conclusions.
The audit prices less cleanly than the review. The timeline rests on landlord cooperation. The work depends on what records the landlord turns over. And the job may include dispute resolution under the protocol.
"Most CAM disputes resolve at the review stage without ever invoking formal audit rights. The reconciliation statement alone is enough to identify the major billing categories where the landlord billed inconsistently with the lease. The formal audit becomes necessary when the landlord disputes the review findings or when material expense categories require verification beyond what the reconciliation summary shows." - Angel Campa, Founder, CAMAudit
The escalation path from review to audit
The path from review to audit runs in three steps.
Step one: Review and recommendation. The firm runs the CAM review, writes the findings report, and gives the client the recommendation. For clean bills with no findings, the work ends here. For bills with findings, the advice usually starts with a request for backup, not a jump to formal audit rights.
Step two: Documentation request and dispute letter. The firm prepares a correction draft. It sums the findings, asks for backup on the contested items, and asserts the dispute under the lease's dispute provision. The landlord replies with documents, more explanation, or a settlement talk. Many disputes settle here. The documents either confirm or rebut the finding without a full audit.
Step three: Formal audit. When step two does not settle the dispute, the firm and client decide whether to use formal audit rights. The call rests on three things. The dollar size of the open findings. The strength of the lease language behind them. And the dispute deadlines in the audit rights provision. The firm starts the audit with written notice to the landlord. The work then moves from review scope to audit scope.
So the review is the main engagement. The audit is a follow-on, only if needed. Pricing should match this.
Pricing the engagement boundary
The review-versus-audit split means one thing for pricing. Price each scope on its own. Do not bundle them.
Review pricing. Fixed fee in the $750 to $1,500 range per single-year, single-property engagement. Multi-year lookback work scopes at $1,500 to $6,000.
Documentation request and dispute letter. Fixed fee in the firm's set range. Often it sits inside the review fee. Sometimes you scope it on its own for clients who ask for the dispute deliverable.
Formal audit. Hourly work at $200 to $300 per hour, with a not-to-exceed cap set to the expected scope. Most formal audits run 20 to 60 hours. That covers notice prep, expense detail review, finding write-up, and settlement work.
For more pricing detail, see accounting firm CAM audit pricing.
Capabilities the firm needs for each scope
Both scopes need the same base skills. Lease reading. Reconciliation math. Recommendation framing. And a structured detection method, which CAMAudit provides through the white-label partner program.
The audit scope adds two skills the review does not need:
Audit rights process management. Using the audit rights provision, running the notice period, and lining up record production with the landlord takes process discipline the review does not. Some firms team up with their client's real estate counsel for this. Others handle it in-house if they have real estate experience.
Expense detail analysis. Reviewing the landlord's general ledger extracts, vendor invoices, and tax and insurance papers to check the reconciliation. This is plain forensic accounting work. It just takes more time than a review.
Firms new to this practice should start with review-only work. Add audit skill over time. That is the natural path.
Marketing the scope distinction to clients
When a tenant client asks about CAM help, explain the two scopes clearly. That sets the right expectation.
Here is a way to frame it:
"There are two ways to do this. A CAM review uses your lease and the reconciliation statement to find billing gaps. We use documents you already have, deliver findings in a few weeks, and advise on whether to dispute. Most disputes settle at this stage. A formal CAM audit uses your lease's audit rights provision to reach the landlord's underlying expense records. That goes deeper and takes longer. It fits when the review findings are disputed, or when big expense categories need a check past the reconciliation summary."
This helps the client see what they pay for. It shows why the review is the right start for most disputes.
How CAMAudit supports both scopes
CAMAudit's detection method produces structured findings either way. That holds for a reconciliation statement alone (review scope) or a statement plus landlord expense detail (audit scope). The CAM detection rules apply to both. The scopes differ not in the method but in the depth of documents and the rigor of the check.
For a review, you run the reconciliation through CAMAudit, check findings against the lease, and produce the report. For a formal audit, you do the same, then check the underlying expense detail to confirm the reconciliation matches the landlord's actual costs. The detection layer stays the same. The check layer grows.
When the firm should refer rather than escalate
Some audits move to litigation or arbitration. When that happens, the work shifts to expert witness work. The right person shifts to a forensic CPA with CFF credentialing or attorney-led litigation support.
For most firms, the line is clear. Handle the review and most formal audits in-house. Refer out to forensic CPA partners or commercial real estate litigation counsel when the work crosses into expert testimony, deposition, or trial. That referral keeps the firm on the analysis. It brings in the right specialist for the litigation phase.
For more on the forensic engagement structure, see the AICPA forensic services member guide.
Frequently Asked Questions
What is the difference between a CAM review and a CAM audit?
A CAM review is the analytical examination of a reconciliation statement against the lease to identify billing discrepancies. A CAM audit is the formal exercise of the lease's audit rights provision, requiring written notice and access to the landlord's underlying expense records.
Does the firm need to invoke audit rights to do a CAM review?
No. A CAM review uses documents the tenant already possesses: the executed lease, the reconciliation statement, and the monthly CAM estimate invoices. Audit rights are invoked only when escalating to formal audit.
When should a review escalate to a formal audit?
When the review identified material findings that the landlord disputes, when the client wants to verify the landlord's underlying expense detail, and when the lease's audit rights window is still open.
How does scoping differ between review and audit?
A review scopes as a fixed-fee engagement using documents the tenant already has. A formal audit scopes more open-ended because timing depends on landlord cooperation with audit rights.
Can the same firm do both review and audit?
Yes. The capabilities required are the same: lease reading, reconciliation arithmetic, and recommendation framing. The audit adds expense detail review and audit-rights process management.