CAM review vs. CAM audit: the scope distinction accounting firms need
When a commercial tenant client tells their accounting firm they want help with their CAM, the next question the firm needs to answer is whether the client needs a review or a formal audit. The two engagements use overlapping capabilities but produce different deliverables on different timelines, and pricing them as if they are the same work is one of the most common scoping mistakes I see in accounting firms entering this practice.
After testing reconciliation samples from published audit cases through CAMAudit, the majority of disputes resolve at the review stage without escalating to formal audit. Understanding when each scope is appropriate helps the firm price correctly, set client expectations, and identify the engagement boundary where review escalates to 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 is the analytical examination of the reconciliation statement against the lease using documents the tenant already possesses. The deliverable identifies billing discrepancies and quantifies the dollar variance for each finding without requiring access to the landlord's underlying expense detail.
The review uses three input documents: the executed lease with all amendments, the annual CAM reconciliation statement for the year under review, and the monthly CAM estimate invoices that establish the cumulative estimate the reconciliation true-up adjusts.
The review applies compliance rules to the reconciliation. CAMAudit applies 14 detection rules covering operating expense definition, pro-rata share calculation, gross-up methodology, management fee provision, controllable expense cap, base year analysis, and several classification-based rules for landlord overhead, insurance, taxes, and utilities. The output is a structured findings report.
The review produces a recommendation: accept, request supporting documentation, or dispute. For most reconciliations, the recommendation can be made on the strength of the review findings without escalating to formal audit.
The review scopes cleanly as a fixed-fee engagement because the inputs are known, the methodology is structured, and the deliverable timing is under the firm's control.
What a formal CAM audit covers
A formal CAM audit invokes the lease's audit rights provision and adds a layer of work the review does not include: review of the landlord's underlying expense records.
The audit uses the same input documents as the review plus the landlord's expense detail obtained through the audit rights process. That detail typically includes general ledger extracts for the operating expense categories, vendor invoices supporting major expense items, and tax bills and insurance policies. The detail enables verification that the reconciliation accurately reflects the landlord's actual expenses.
The audit is governed by the audit rights protocol in the lease. That protocol typically requires written notice within a defined window after reconciliation receipt, a defined audit period during which the landlord must produce records, and a reporting protocol for delivering audit findings to the landlord and triggering settlement discussions.
The audit produces a more comprehensive finding set than the review because the underlying expense detail allows verification of categories that the reconciliation summary obscures. The audit also produces stronger evidentiary support for findings because the underlying records back the conclusions.
The audit scopes less cleanly than the review because the timeline depends on landlord cooperation, the work product depends on what records the landlord produces, and the engagement may involve dispute resolution under the audit 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 natural progression from review to audit follows three steps.
Step one: Review and recommendation. The firm conducts the CAM review, produces the findings report, and presents the recommendation to the client. For clean reconciliations with no findings, the engagement ends here. For reconciliations with findings, the recommendation typically begins with requesting supporting documentation rather than immediately invoking formal audit rights.
Step two: Documentation request and dispute letter. The firm prepares a dispute letter draft that summarizes the findings, requests supporting documentation for the contested categories, and asserts the dispute under the lease's dispute provision. The landlord responds with documentation, additional explanation, or settlement discussion. Many disputes resolve at this stage because the documentation either confirms or rebuts the finding without requiring full audit.
Step three: Formal audit invocation. When step two does not resolve the dispute, the firm and client decide whether to invoke formal audit rights. The decision turns on the dollar magnitude of the unresolved findings, the strength of the lease language supporting the findings, and the dispute deadlines specified in the lease audit rights provision. Formal audit is invoked through written notice to the landlord, and the engagement transitions from review to audit scope.
This three-step path means the review is the primary engagement and the audit is a conditional follow-on. Pricing should reflect this structure.
Pricing the engagement boundary
The pricing implication of the review-versus-audit distinction is that the firm should price each scope separately rather than bundling.
Review pricing. Fixed fee in the $750 to $2,500 range per single-year single-property engagement. Multi-year lookback engagements scope at $2,500 to $6,000.
Documentation request and dispute letter. Fixed fee in the $500 to $1,500 range, often included in the review fee but sometimes scoped separately for clients who explicitly request the dispute deliverable.
Formal audit. Hourly engagement at $200 to $300 per hour with a not-to-exceed cap negotiated based on expected scope. Most formal audits run 20 to 60 hours including audit notice preparation, expense detail review, finding documentation, and settlement participation.
For pricing detail beyond this overview, see accounting firm CAM audit pricing.
Capabilities the firm needs for each scope
Both scopes require the same foundational capabilities: lease reading, reconciliation arithmetic, recommendation framing, and structured detection methodology (which CAMAudit provides through the white-label partner program).
The audit scope adds two capabilities the review does not require:
Audit rights process management. Invoking the audit rights provision, managing the notice period, and coordinating record production with the landlord requires a process discipline that the review does not. Some accounting firms partner with their clients' real estate counsel for this process management; others handle it internally if the firm has CRE experience.
Expense detail analysis. Reviewing the landlord's general ledger extracts, vendor invoices, and tax and insurance documentation to validate the reconciliation. This is straightforward forensic accounting work but requires more practitioner time than a review-stage engagement.
For firms entering this practice, starting with review-only engagements and adding audit capability over time is the natural progression.
Marketing the scope distinction to clients
When a tenant client asks the firm about CAM help, the firm needs to explain the scope distinction clearly to set the right engagement expectation.
The conversation framework is:
"There are two ways to engage on this. A CAM review uses your lease and the reconciliation statement to identify billing discrepancies. We do that work using documents you already have, deliver findings within a few weeks, and produce a recommendation on whether to dispute. Most disputes resolve at this stage. A formal CAM audit invokes your lease's audit rights provision to access the landlord's underlying expense records. That is a deeper engagement, takes longer, and is appropriate when the review findings are disputed or when material expense categories need verification beyond the reconciliation summary."
The framework helps the client understand what they are paying for and why the review is the appropriate starting engagement for most disputes.
How CAMAudit supports both scopes
CAMAudit's detection methodology produces structured findings whether the input is a reconciliation statement alone (review scope) or a reconciliation statement plus landlord expense detail (audit scope). The 14 detection rules apply to both. The difference between scopes is not the detection methodology but the depth of input documents and the rigor of the verification layer.
For a review, the practitioner runs the reconciliation through CAMAudit, validates findings against the lease, and produces the deliverable. For a formal audit, the practitioner runs the reconciliation through CAMAudit, validates findings against the lease, and then validates the underlying expense detail to confirm that the reconciliation accurately reflects the landlord's actual costs. The detection layer is consistent; the verification layer expands.
When the firm should refer rather than escalate
Some audit engagements escalate to litigation or arbitration. When that happens, the engagement profile shifts toward expert witness work and the practitioner profile shifts toward forensic CPAs with CFF credentialing or attorney-led litigation support.
For most accounting firms, the appropriate boundary is to handle review and most formal audits internally and refer to forensic CPA partners or commercial real estate litigation counsel when the engagement crosses into expert testimony, deposition, or trial work. That referral relationship preserves the firm's role in the analytical foundation while bringing in the appropriate specialist for the litigation phase.
For more on the forensic engagement structure, see the AICPA forensic services member guide.