Accounting Firms
CPA firms with business advisory practices can add CAM audit as a formal overhead reduction service. Learn how to position, structure, and price this non-attest advisory engagement.
Your advisory practice already serves commercial tenant clients. You do their tax and financial statements. More and more, you do FASB ASC 842 lease accounting too. A CAM audit needs the occupancy cost line, the lease terms, and the CAM statement. CAM means common area maintenance, the shared cost a landlord bills back to a tenant. All of that is already in the client file. Add CAM audit as a service line and you turn that data into billable work. You do not need a new client. You do not need to gather new data.
Management advisory services (MAS): A category of professional services recognized by the AICPA in which CPAs provide management consulting, operational analysis, and advisory functions to clients beyond the traditional attest and tax compliance scope. MAS engagements are non-attest services and are governed by AICPA Statements on Standards for Consulting Services (SSCS). CAM audit, as a forensic billing review and cost-recovery advisory service, fits within the MAS framework.
The key call here is simple. Place CAM audit in the advisory bucket, not the compliance bucket. That choice shapes your price, your staffing, and your client pitch.
Compliance work covers tax returns, financial statements, and audit and review. It follows set standards. It has set deliverables. It is price-driven, since clients can shop the same deliverable across firms. Advisory work covers cost analysis, modeling, and operations consulting. It is priced on value, not hours.
CAM audit gives a clear, countable result. It is recovered overcharges. Say a client pays $60,000 a year in CAM across three locations. Your findings show $8,000 a year in overcharges. That is direct, measured value. That result earns an advisory fee, not a compliance rate.
The AICPA Statements on Standards for Consulting Services (SSCS) set the frame. CAM audit fits as a consulting job. You use your skill to help the client find and recover billing errors. No attest work is involved. No independence rule applies. You document it in an advisory engagement letter, separate from any attest or tax work.
This choice also helps you compete. Firms that compete on compliance price face pressure from software and offshore shops. Firms that build advisory lines with real results earn higher rates. They also keep clients longer than compliance-only firms do. CAM audit is one of the clearest advisory services around. The result is a dollar amount, not an opinion.
The screening data is already in the tax file. That is why you are better placed to build this line than any outside shop.
Tax return. The occupancy deduction on Schedule C, Form 1065, or the corporate return marks the client as a commercial tenant. The rent shows up there. If the deduction lists base rent and CAM as separate items, the client has a NNN or modified gross lease. NNN means a triple-net lease, where the tenant pays taxes, insurance, and CAM on top of rent.
ASC 842 work. If a client finished lease accounting setup, the lease abstract is in your file. It lists the operating expense rule, the pro rata share method, the base year term, the cost cap, and the payment setup. Pro rata share is the slice of building cost the tenant owes. These are the exact terms a CAM audit needs. Your ASC 842 work is pre-audit prep.
Occupancy cost trend. Multi-year statements show how occupancy cost moves over time. A CAM line that grows much faster than base rent is a flag. Lease cost caps are meant to limit how fast CAM rises each year. If CAM grows faster than the cap allows, that may be a billing error. You can spot this trend when you do the yearly statements. You need no extra data request.
CAM statements. Some clients send all occupancy documents with their tax materials. Then the CAM statement may already be in the file. If the client uses your bookkeeping or controller services, the statement is there for sure.
"I built CAMAudit because CPA firms have all the data required to identify CAM billing errors sitting in their client files. The gap was a structured process and forensic tooling to turn that data into documented findings with correction drafts attached." - Angel Campa, Founder of CAMAudit
If you do both attest and non-attest work for one client, you must follow the AICPA independence rules. Here is the key question for CAM audit. Does a CAM audit job hurt your independence for attest work?
Under AICPA ET Section 1.295 (Nonattest Services), the answer is no. You just have to set it up right. The rules say two things. Client management must own the decisions made from the advisory work. And you must not make management decisions for them.
In practice, set up the job this way. You deliver the findings and correction drafts. Client management decides whether and how to pursue a dispute. You do not approve the dispute. You do not run the landlord relationship. The client acts on the findings on their own.
This matches how you deliver all advisory work to attest clients. You give analysis and advice. The client carries it out. Spell this out in the engagement letter. That keeps your independence for the attest work.
AICPA Code of Professional Conduct Rule 1.295.145 (Scope of services) adds context. Non-attest services that reasonably extend the attest relationship are allowed. That includes management consulting, operations analysis, and cost reduction advice. You just have to meet the independence standards.
See CAM audit for CPAs and accounting advisors and forensic accounting niches for CPA firms for more on how CPA firms place lease audit in their advisory work.
Two main structures fit a CPA firm.
Yearly retainer add-on. For clients already on a recurring retainer, add a CAM audit line. Scope it to a yearly review of all commercial locations. Price a flat fee per location per year. It runs $400 to $1,500, based on lease detail, yearly CAM spend, and location count. This makes CAM audit a steady yearly revenue item for you. It is a steady yearly cost for the client.
Standalone CAM audit. For clients not on a retainer, or for a project, use a standalone engagement letter. The scope covers document collection for the chosen locations and years. It covers the CAMAudit analysis, the findings review, and dispute strategy advice. Price a flat project fee per location per year. Or bill hourly at your advisory rate. Pass the CAMAudit cost through to the client, or fold it into the project fee.
Multi-year lookback jobs earn more, since they cover more years. A three-year lookback for a three-location client is nine audit units. Before you quote that, model the audit count, your plan cost, staff review hours, client meeting time, and the advisory fee.
The referral model fits firms that want to add value without building delivery. You share a CAMAudit partner link with clients who qualify. You earn referral pay on eligible audits under the current partner agreement. You add advisory context around the findings for the client. The CPA Service Line ROI Calculator projects yearly revenue from a CAM audit line. It uses your own inputs: client count, average advisory rate, and expected recovery size.
FASB ASC 842 took effect for most private companies in fiscal years that began after December 15, 2021. It made companies put operating lease assets and liabilities on the balance sheet. If you led or helped an ASC 842 setup for a tenant client, you made work you can reuse for CAM audit.
The ASC 842 lease abstract holds the key terms. It has the operating expense rule, the pro rata share method, the lease term, the fixed versus variable payment split, and the cost increase setup. These are the same terms a CAM audit needs. If you already abstracted these for ASC 842, you have done 60 to 70 percent of the prep for CAM audit.
The move from ASC 842 work to CAM audit is a natural next step. Here is the pitch. "We organized your lease terms for your balance sheet. That same work lets us check if your CAM bills are right. We already have the terms pulled. Let us run your statements through a forensic check."
This frames CAM audit as a follow-on to work the client already paid for. It is not a cold new pitch. It also removes the document hunt, since the abstracts are already in your file.
The white-label program lets you send CAM findings reports under your own name and letterhead. The client gets a document with your firm's identity. CAMAudit runs the forensic analysis in the background.
This is the right model when you build CAM audit as a service line. It keeps you as the main advisor. It puts your brand on the delivery. It lets you price at advisory rates, not tool rates.
For correction drafts, the program gives you letter templates with your header. The drafts cite the exact lease terms and the billing math. The client reviews and approves before sending. You can advise on tone. Pick collaborative, neutral, or firm. For big findings, route the letter through the client's attorney.
BOMA International and IREM publish operating expense benchmarks by property type and area. These give outside support for your findings. They help when you present to clients. They help when the client's attorney needs backing data for a dispute. Cite BOMA or IREM data on typical management fee rates. That shows the error is a pattern, not a one-time typo.
Your edge is your client base. Every commercial tenant in your tax file is a possible CAM audit. The screen is simple: lease type and yearly CAM spend. You can run it across your whole client list in one afternoon.
Here is a year-one plan. Find your top 10 to 15 tenant clients by yearly CAM spend. Start the advisory talk at the renewal or planning meeting. Set up CAM audit as a Q1 task that lines up with the statement. Use the referral model for clients where you have not set up branded delivery yet. Use branded delivery for clients where you are the main advisor and want to build the line.
In year two and beyond, the line becomes a standard part of your advisory practice. Bring it up with any new client who has commercial space. Put it in your services brochure and on your website. Happy clients who got money back will tell their network you caught the billing error.
This is how a service line grows. The first clients give you revenue and case studies. Case studies bring in new clients with similar profiles. The line feeds itself.
See CAM audit white-label program for accounting firms and RCM consultant and advisor service line addition for more setup help.
Disclaimer: This article provides general educational information about CAM reconciliation review, the AICPA standards framework for advisory services, and the CAMAudit partner program for CPA firms. It is not legal, tax, or accounting advice. The engagement examples are illustrative estimates based on list pricing and partner program economics; actual results depend on client volume and purchasing behavior. AICPA independence analysis for specific client relationships should be conducted by qualified legal and professional standards counsel. Consult qualified commercial real estate counsel before initiating formal disputes with commercial landlords.
Add CAM audit to your advisory practice. See the white-label and referral program at /partners/white-label.
Does CAM audit require CPA licensure or trigger independence requirements?
No. CAM audit is a non-attest advisory service, specifically a forensic review of landlord billing against lease provisions. It is not an audit or review of financial statements and does not require CPA licensure to perform. Under AICPA Code of Professional Conduct, non-attest advisory services do not impair independence for the attest function. However, the engagement should be documented in a separate advisory engagement letter that clearly defines the scope as non-attest. Consult your professional liability carrier for coverage specifics.
How does CAM audit fit within the AICPA management advisory services (MAS) framework?
AICPA has long recognized management advisory services as a distinct service category within the CPA profession. CAM audit is a cost-recovery advisory service: the CPA firm reviews landlord billing, identifies billing errors, and advises the client on recovery options. This fits the MAS framework as an operational consulting engagement. It is not a financial statement attest function and does not require independence.
How does the CPA firm leverage its existing client data for CAM audit?
CPA firms that prepare tax returns and financial statements for commercial tenant clients already have access to the occupancy cost data. The rent schedule on the tax return identifies the client as a commercial tenant. ASC 842 lease accounting work may have already produced a lease abstract with the key provisions. The CAM reconciliation may be in the tax file if it was used to document occupancy expenses. The CPA has the documents; the question is whether they have a process to act on them.
What is the engagement economics for CPA firms adding CAM audit?
CPA firms should model CAM audit economics by client count, locations per client, CAMAudit plan cost, staff review time, and advisory fee. White-label delivery gives the firm more control over pricing and client experience. Referral delivery has lower revenue potential but avoids delivery overhead.
Can a CPA firm add CAM audit without disrupting its existing tax and attest work?
Yes. CAM audit is a standalone non-attest advisory engagement. It is documented in a separate engagement letter from the attest or tax engagement, scoped independently, and billed separately. Clients with whom the CPA firm has an independence requirement for attest purposes can still receive non-attest advisory services, including CAM audit, provided that the independence requirements and management responsibilities rules are observed. Review AICPA ET Section 1.295 for the relevant standards.
Which CPA firm clients are the best candidates for a CAM audit conversation?
Business clients with NNN or modified gross commercial leases are candidates. The lease structure is typically visible in the tax file: Schedule E for pass-through entities, Form 8825, or occupancy deductions on Schedule C or the corporate return. Clients paying more than $20,000 per year in CAM charges and occupying space in multi-tenant buildings are highest priority. Multi-location clients (restaurant groups, medical practices, franchise operators, professional services firms with distributed offices) generate the most audit volume.
How does the CPA integrate CAM audit with FASB ASC 842 lease accounting engagements?
ASC 842 implementation requires extracting key lease provisions: operating expense definitions, pro-rata share methodology, base year provisions, expense caps, and variable payment structure. These are the same provisions required for a CAM audit. CPA firms that completed ASC 842 implementations for clients have the lease data already organized in their work product. The transition to CAM audit advisory requires adding a billing verification step on top of the lease abstraction work that was already done.
Add CAM audit to your client services. White-label CAMAudit under your firm brand.
Add CAM audit to your service line