A CAM reconciliation statement tells you far more about a property than a single line item on a rent roll. It shows whether the landlord bills tenants the correct amount, whether tenants push back or pay without a dispute, and whether the expense history holds steady or swings from year to year. For a buyer under contract in 2026, a close read of CAM reconciliation basics belongs on the due diligence checklist alongside title work and estoppel certificates.
Why CAM Reconciliation Review Matters Before You Buy NNN Properties in 2026
The idea behind CAM reconciliation is simple: tenants pay an estimate each month, and the landlord reconciles the total at year-end against actual cost. When CAM fees stay consistent year after year, it signals the property is well-run and the landlord tracks expenses with care. When the true-up reveals large swings, disputed charges, or unpaid balances, it can signal a property may carry hidden cost or hidden risk for the next owner.
Per industry data from BOMA International and IREM, CAM reconciliation problems and misclassified expenses rank among the top drivers of landlord-tenant disputes in commercial real estate. A buyer who skips this review risks inheriting a dispute already years in the making.
CAM Documents to Request From the Seller
As you weigh the purchase of your first NNN property, you need to do your due-diligence when it comes to the building’s historical CAM fees. Request and review the following from the building’s seller or selling agent:
- Reconciliation statements from the last three years give you a track record rather than a single snapshot. Look for consistent categories, stable totals, and prompt delivery to tenants each year.
- Audit rights language in the lease tells you whether a tenant can challenge a reconciliation and what the process looks like. A tenant with strong audit rights and a history of using them signals a property held to a high standard.
- Expense cap provisions on controllable costs, such as landscaping or janitorial service, matter most, since they protect a tenant from runaway increases and protect a buyer from inheriting an under-market recovery structure.
- Insurance and real estate tax escrow statements round out the request, since these two line items often move alongside CAM in a reconciliation and can carry their own history of shortfalls or surprise increases at renewal.
Red Flags in CAM Reconciliation History
As you review the property’s CAM documentation, these red flags could signal that your intended investment property might be more trouble than it’s worth:
A reconciliation that jumps by a large percentage in a single year, without a matching capital project or a clear one-time cost. (This could merit a direct question to the seller.)
A history of tenant disputes or under-collection points to a property where the landlord and tenant do not read the lease the same way, a gap the new owner inherits at closing.
Capital expenses billed through CAM instead of a separate reserve or account raise a compliance concern, since most leases exclude true capital items, like a full roof replacement or an HVAC system swap, from routine CAM recovery.
What a CAM Discrepancy Means for Your Offer
A CAM reconciliation issue or discrepancy does not leave the deal dead in the water, but it could open the terms to fresh negotiation. A pattern of under-collection can signal that in-place rents understate the property’s true income, since the landlord may need to raise base rent or tighten expense caps at the next renewal to close the gap. A pattern of tenant disputes can point to language in the lease that a new owner will want to clean up at the first renewal or amendment.
Bring any CAM discrepancy you find to your advisor before you finalize the price or move past your due diligence window. A seller credit, a price adjustment, or a holdback in escrow can offset a known gap in the numbers, and each option keeps the deal on track without leaving the buyer to absorb a cost the seller’s own records already point toward.
How Lease Type Changes Your CAM Exposure
CAM exposure changes with lease type. In a gross or modified gross lease, the landlord absorbs most CAM cost and passes along only a portion, which means the property’s true operating margin depends a great deal on accurate expense tracking. In a double net (NN) lease, the tenant covers most CAM but the landlord still holds responsibility for roof and structure, so improvement and CAM questions sit side by side.
In an absolute NNN lease, the tenant pays 100% of CAM along with taxes and insurance, and the landlord holds zero CAM responsibility. This structure is common with auto parts retailers like AutoZone and O’Reilly, where in many deals the tenant covers CAM, roof, and structure alike, leaving the landlord with a check and little else to track.
Where Absolute NNN Removes the CAM Question at the Root
For a buyer who wants to skip CAM due diligence altogether, an absolute NNN lease removes the question at its root. Properties like the ones profiled in our O’Reilly Auto Parts tenant spotlight place CAM, tax, insurance, and improvement duty on the tenant from lease signing forward.
That said, not every buyer wants a single-tenant, single-lease structure. An investor building toward a diversified NNN lease portfolio across sectors and tenants may accept a small amount of CAM exposure in exchange for a specific cap rate or location. Our guide on why now is a strong time to buy NNN properties covers how current cap rates and financing cost weigh against this trade-off. And our step-by-step guide to NNN investing walks through how to evaluate a NNN lease investment across tenant credit, lease term, and expense structure from the first call to closing.
Ready to review CAM reconciliation history on a property you have under consideration? Contact a Westwood Net Lease Advisor for a no-obligation conversation at 314-997-5227. We represent buyers from the property search through closing, at no cost to you.
