Lease accountant: integrate CAM audit into ASC 842 right-of-use asset review
Lease accountants who do ASC 842 work already hold what a CAM audit needs. ASC 842 is the lease accounting rule. CAM means common area maintenance, the shared costs a landlord bills back. You keep the signed leases, the amendments, the lease abstracts, and the payment schedules. A lease abstract is the short summary of key lease terms. These files already hold the CAM terms an audit checks. That means the management fee cap, the pro rata share formula, the gross-up rule, and the controllable expense cap. Pro rata share is the tenant's slice of total costs. A gross-up adjusts costs as if the building were full. I built CAMAudit because the data to catch CAM overcharges was already sitting in your files. The audit step just was not part of the yearly cycle. This article shows how to add a CAM audit to your ASC 842 review. It covers how to book the findings. It also covers the white-label model for firms that serve tenant clients.
Variable lease cost (ASC 842): Under ASC 842 (FASB Accounting Standards Codification Topic 842), variable lease costs are payments made by a lessee to a lessor that are not included in the lease liability measurement because they depend on future events rather than being fixed. CAM charges are a primary component of variable lease cost for commercial real estate clients on NNN leases, expensed as incurred in the period they are recognized.
You already have the files
ASC 842 made you pull together and summarize every lease. So once that work is done, you have these for each NNN lease. NNN is a net lease where the tenant pays the shared costs.
- The signed lease and every amendment, sorted and easy to find
- A lease abstract with start date, rent schedule, renewal options, and variable payment terms
- The ROU asset and lease liability schedule. The ROU asset is the right to use the space.
- A variable lease cost schedule, updated as the landlord sends statements
These four items hold every input the CAM audit needs. The management fee cap, the pro rata share method, the gross-up rule, and the excluded cost list all sit in your ASC 842 summaries. Those same items are what the audit checks. So the audit is not new data work. It is a check on data you already keep.
How to book the findings
You need to know how to record a recovery before you advise a client. Here is the basic treatment by case.
Current-year overcharge. The audit finds an overcharge in this year's CAM reconciliation. A reconciliation is the landlord's year-end true-up of actual costs. The landlord gives a credit or fixes the next statement. The credit cuts variable lease cost in that period. You do not need a prior-period fix.
Prior-year overcharge. A CAM audit may cover past years. The lease sets the review period. Past costs need a check under ASC 250. That rule covers accounting errors. Ask the client accountant how to book any credit.
Abstract correction. The audit may show a lease term you summarized wrong. Fix the term in your lease system. Some fixes need a lease modification check under ASC 842-20-55. That check tells you if the ROU asset and liability must be remeasured.
| Finding type | Accounting treatment |
|---|---|
| Current-year overcharge, credit received | Reduce variable lease cost in credit period |
| Prior-year overcharge, immaterial | Record as reduction in current-period lease expense |
| Prior-year overcharge, material | Evaluate ASC 250 prior-period adjustment |
| Abstract error corrected | Update lease management system; evaluate remeasurement under ASC 842 |
The rules that matter most to lease accounting
CAMAudit runs a set of CAM detection rules. These rules touch your variable lease cost the most.
CAM cap violation. The lease sets a cap on how much CAM can rise each year. CAMAudit works out the allowed rise from the base year. The base year is the cost level the lease uses as a starting point. Then it checks the real billed CAM. A cap break means the tenant paid above the lease limit.
Manager fee overcharge. The lease may cap this fee. CAMAudit uses the lease base and rate. Then it checks the fee the landlord billed.
Gross-up error. An office lease may have a gross-up rule. This rule adjusts some costs when space is empty. The landlord may use the wrong inputs or method.
Base year error. Some leases use a base year stop to set the tenant's CAM. A wrong base year amount inflates cost for the whole lease term. That happens from a bad figure or from costs that should have been left out.
Pro rata share error. The pro rata share sets the percent of building CAM the tenant pays. A wrong denominator grows worse every year. It also hits every CAM line in the schedule.
"Lease accountants doing ASC 842 work are the most prepared people to run CAM audits. They already have the lease, the abstract, and the variable payment history. " - Angel Campa, Founder, CAMAudit
Where it fits in your yearly cycle
The audit fits best in your variable lease cost true-up. Here is the order we suggest.
- Q4 prior year or Q1 this year. The landlord sends the annual CAM reconciliation.
- Q1 this year. Send the reconciliation and lease files through CAMAudit. The audit runs for each location.
- Q1 this year. Review the findings. Check each gap against your lease abstract.
- Q1 this year. If there are findings, draft a fix or talk to the landlord. Book a receivable if recovery looks likely.
- Q2 or Q3 this year. The credit arrives. Record the cut to variable lease cost.
- Year-end. Update the variable lease cost accrual with the fixed numbers.
Which locations to audit first
Do you manage many locations under ASC 842x Here is how to rank them.
Start with old CAM bills that are still open.
Next, check leases with caps or gross-up rules.
Then check large sites and shared office buildings.
Review open items before a lease ends or renews.
Start with the top tier and work down. This finds the most recovery in year one. A strong first year builds client trust. Then you can add the lower tiers in later years.
White-label delivery for firms
You serve tenant clients. You can add a CAM audit to work you already do. Here is the white-label model. White-label means the work carries your brand, not ours.
- You add the client's lease files and CAM reconciliations to CAMAudit
- The audit runs across the CAM detection rules
- A findings report comes back with dollar gaps and lease citations
- You deliver the report under your own firm name
Client pricing may start with a fee per site. Adjust it for lease detail and review years. A success fee may fit some work. Check your terms, insurance, and firm rules first.
Model your steady-state economics from four inputs.
| Input | How to model it |
|---|---|
| Client fee | Flat fee, scoped fee, or allowed success-based component |
| CAMAudit audit-pack cost | Use the current audit pack that covers expected annual audit volume |
| Staff review time | Document intake, findings review, client call, and follow-up review |
| Included follow-up | Backup requests, abstract updates, counsel coordination, or annual monitoring |
Use the White-Label Margin Calculator to model your volume, audit-pack cost, staff time, and rate.
Frequently Asked Questions
How do CAM charges appear in an ASC 842 lease accounting model?
Under ASC 842, variable lease payments that depend on an index or rate are included in the lease liability measurement. CAM charges are classified as variable lease costs and are expensed as incurred (not included in the right-of-use asset calculation when they are truly variable and non-index-linked). They appear in the P&L as variable lease cost, separate from amortization of the ROU asset. Auditing CAM ensures the variable lease cost recognized matches actual contractual obligations.
What is the accounting impact of a CAM overcharge discovery on an ASC 842 lease schedule?
If a CAM overcharge is identified and a credit is negotiated, the credit reduces future variable lease cost in the period it is applied. If the overcharge spans multiple prior accounting periods, the company should evaluate whether the amounts are material enough to require a prior-period adjustment under ASC 250. For most CAM overcharges, the amounts are recorded as a reduction in current-period lease expense rather than a restatement, unless the cumulative amount is material to the financial statements.
Which lease documents does a lease accountant already have that enable CAM audit?
Lease accountants working under ASC 842 maintain complete executed leases, lease abstracts, amendment logs, and commencement date schedules as required for ROU asset calculation. These same documents contain all the CAM provisions required for audit: management fee cap percentage, pro-rata share formula, gross-up thresholds, controllable expense cap, and excluded categories. No additional document collection is required beyond what is already in the lease accounting file.
How does CAM cap violation affect ASC 842 variable lease cost projections?
When a landlord violates the CAM cap by billing annual increases above the lease-permitted rate, the tenant has been overpaying variable lease cost. The overcharge does not affect the ROU asset or lease liability (since the cap violation is a contractual dispute, not a modification of the lease), but it does affect the accuracy of variable lease cost in the P&L. Documenting the cap violation supports a credit request that reduces future variable lease cost.
How does CAMAudit handle the gross-up provision in office leases?
CAMAudit extracts the gross-up occupancy threshold (commonly 90% or 95% of building occupancy), the expense categories subject to gross-up, and the methodology (actual vs. estimated). It then checks whether the landlord applied gross-up at the correct threshold and to the correct expense pool. If the gross-up was applied at 95% occupancy when the building was 85% occupied, or if it was applied to non-eligible expenses, the system flags the variance with a dollar calculation and lease citation.
What is the white-label delivery model for a lease accounting firm adding CAM audit?
A lease accounting firm uploads client lease documents and CAM reconciliation statements to the CAMAudit portal. Detection runs automatically and generates a findings report with quantified variances and lease citations. The firm delivers the findings under its own branding as part of the ASC 842 engagement or as a standalone occupancy cost review. The firm sets client pricing and models practice economics from current audit-pack cost, staff review time, and client fee.
Can CAM audit findings be used to adjust a lease abstract in the ASC 842 system?
Yes. If a CAM audit reveals a lease provision that was abstracted incorrectly (for example, the controllable expense cap rate was entered at 5% when the lease specifies 3%), the findings provide the basis for correcting the abstract in the lease management system. Corrected abstracts improve the accuracy of future variable lease cost accruals and reduce the risk of continuing to accrue at the wrong rate.