A suburban office tenant saw ordinary line items for janitorial and repairs on the CAM statement. The GL showed $81,400 paid to an entity sharing the landlord's management company name, representing 34% of controllable operating spend. CAMAudit flagged the vendor concentration and related-party naming pattern for contract and invoice review.
← All detection rules
15
Rule 15 of 20 · Classification rule
Vendor Concentration / Related-Party Risk in CAM Charges
Concentrated or affiliated vendor spend is not automatically wrong, but it is one of the clearest signals that backup documentation is worth requesting.
If one affiliated vendor receives 38% of the operating budget, a tenant can pay inflated CAM charges without seeing the relationship on the summary statement. A $75,000 vendor concentration deserves backup before payment.
What it checks
A vendor concentration or related-party risk finding occurs when general ledger detail shows unusual dependence on a single vendor, repeated payments to entities that appear connected to the landlord, or vendor naming patterns that suggest internal allocations rather than arm's-length services. Concentration is not automatically an overcharge. A large security, janitorial, or landscaping contract may be legitimate. The risk is that concentrated spend can hide above-market pricing, duplicate services, management company affiliates, or charges that should be covered by the management fee rather than billed separately through CAM. Related-party arrangements are especially important because many leases require costs to be commercially reasonable, competitively bid, or limited to amounts that would be paid to unrelated vendors. This rule surfaces ledger-level patterns that a tenant should validate with invoices, contracts, bid history, and relationship disclosures.
The logic
Vendor Concentration / Related-Party Risk in 3 passes
- 1
CAMAudit groups GL entries by vendor name and measures each vendor's share of the operating pool, category-level spend, and repeated invoice pattern across the reconciliation period.
- 2
CAMAudit searches vendor names and descriptions for related-party signals such as landlord entity names, management company names, affiliates, internal allocations, corporate services, or common ownership language.
- 3
CAMAudit flags vendors whose spend concentration or naming pattern creates review risk, then reports the affected categories and dollar amounts so the tenant can request contracts, invoices, and competitive pricing support.
What a finding cites
Related glossary terms
FAQ
Questions about vendor concentration / related-party risk
Is high vendor concentration always an overcharge?
No. A large vendor may be legitimate if it provides a major building service at market pricing. Concentration is a review signal, not proof of overcharge by itself.
What is a related-party vendor in CAM?
A related-party vendor is connected to the landlord, owner, manager, or an affiliate. The relationship can matter if the lease requires market pricing, competitive bidding, or excludes internal overhead.
What backup should a firm request for related-party risk?
Ask for invoices, service contracts, bid comparisons, relationship disclosures, and the method used to allocate costs among tenants or properties.
Can a management company affiliate bill separate CAM charges?
Only if the lease permits the charge and the amount is reasonable under the lease standard. Some costs may already be covered by the management fee cap.
Run this check on a client's lease today.
CAMAudit runs all 20 detection rules on every audit and drafts the dispute letter under your brand.