Year-End CAM Reconciliation: An Owner and Tenant Checklist

Updated September 2026.

A year-end common area maintenance (CAM) reconciliation compares a commercial tenant's allocated expenses for the period with the estimated payments already credited to that account. The statement should let an owner or tenant trace the result to the lease, expense records, allocation, and payment history.

Start with the lease. An expense appearing in the property's books does not, by itself, establish that a tenant should be charged for it.

Build the lease worksheet first

The Office of the Comptroller of the Currency's Commercial Real Estate Lending handbook notes that net-lease labels don't have universally agreed definitions. The actual lease needs to be examined to determine expense responsibility.

For each tenant, identify the signed lease and amendments that apply to the reconciliation period. Record the expense definitions, exclusions, allocation formula, and any limits or adjustments. Check the treatment of management fees, taxes, insurance, and capital work individually. Don't assume that every lease uses the same expense pool or percentage.

Record any statement-delivery, payment, objection, or audit provisions and their deadlines. This guide supplies no universal due date. If a provision is unclear, flag it for the person responsible for lease interpretation before finalizing the statement.

Tie the expense pool to the records

Match the reconciliation period and accounting treatment to the lease requirements. Review the general ledger against invoices, service contracts, and supporting schedules. Explain adjustments so another reviewer can follow the calculation.

• Separate charges for a single tenant's space from costs proposed for a shared pool.
• Check for duplicate invoices, reversals, refunds, and vendor credits.
• Identify costs belonging to another property or reporting period.
• Review each excluded or adjusted item against the applicable lease provision.
• Keep the source document and reason for each adjustment with the working schedule.

A comparison with the prior year can help identify items needing explanation. A large change isn't proof of an error. Trace it to the bill, work performed, allocation, or other supporting record.

Show the tenant calculation

Use the allocation method in the tenant's lease. Where the lease uses area, confirm the applicable area measurements and denominator. Where it contains a cap, base-year method, or other adjustment, show that step separately.

Here is a simplified hypothetical example. Assume the lease allocates 10% of a $100,000 eligible annual expense pool to the tenant, with no other adjustments. The tenant's allocated amount is $10,000. If $9,000 in estimated payments has been credited to that period, the reconciliation difference is $1,000.

If the credited estimated payments were $11,000 instead, the difference would be a $1,000 credit. The lease and account records determine how an actual balance or credit is handled. These figures illustrate the arithmetic only.

Reconcile estimated amounts billed with amounts actually paid and credited. Show any unpaid estimated charges separately so the same amount isn't collected twice through the year-end calculation.

Prepare a statement someone else can check

Include the property, tenant, lease period, expense categories, eligible pool, allocation, adjustments, and credited estimated payments. State the resulting balance or credit and identify the supporting schedules. Use the lease's applicable delivery and response instructions.

Before release, have the assigned reviewer compare the statement with the lease worksheet and accounting records. Keep unresolved items visible in the working file. Record the version sent so later questions can be answered against the same calculation.

Owners can also use Coastline's commercial property management guide to review the broader reporting and lease-administration work behind a property report.

For tenants reviewing a CAM statement

Compare the period and allocation with your lease, then check the estimated payments against your own records. Ask about a specific category or calculation when something doesn't match. Include the relevant lease section, statement line, invoice reference if available, and amount in your question.

Send questions through the contact and process specified for your property. Check the lease's response and audit provisions promptly. Keep the statement, your supporting records, and any correction together.