The CAM Reconciliation: A Direct Line to NOI
Last Updated: April 2026
Read Time: 10-12 minutes
Author: Andrew Lofredo, CEO, CRE Vertical Advisors
Part 2 of an Ongoing Series on Approaching Leases Strategically
Owners and managers spend a lot of time focused on rent, occupancy, leasing, and capital projects, as they should.
But one of the quieter drivers of NOI is recovery income.
In a well-leased multi-tenant asset, recoveries can represent a meaningful portion of total revenue. Yet the CAM reconciliation is often treated as an annual accounting exercise - something that gets prepared, billed, filed away, and not thought about again until the following year.
If that is your approach, you could be leaving money and therefore value on the table.
The CAM reconciliation is where the lease meets the actual operating expenses. It is where gross-up provisions, caps, base years, exclusions, management fee limits, and tenant audit rights all get tested against real numbers - not budgets.
If the process is handled well, the owner collects what the lease allows, tenants receive a clear and supportable billing, and recovery income is protected. If it is handled poorly, not only can the leakage be significant, but tenant relations can suffer.
A missed gross-up here, an incorrectly applied cap there (or not knowing the difference between a cumulative cap vs a non-cumulative cap), a management fee billed beyond the lease limit, or a recoverable item written off because nobody checked the lease - none of these may look material in isolation. But across a 100,000 square foot asset, or across a portfolio, the impact can add up quickly.
This is Part 2 of our series on approaching leases strategically. Part 1 covered lease structures and the provisions that control how operating expenses are recovered. This article focuses on the annual CAM reconciliation - and why owners should view it as a direct line to NOI.
What the CAM Reconciliation Is Actually Doing
During the year, tenants typically pay estimated CAM charges in monthly installments. Those estimates are usually based on the prior year’s actual expenses or the current year’s budget.
After year-end, the landlord compares the tenant’s estimated payments to the tenant’s actual share of recoverable expenses.
The calculation depends on the lease and it is not as simple as it sounds. The lease determines what expenses can be included, what expenses are excluded, whether certain costs are capped, whether expenses need to be grossed up, how pro-rata shares are calculated, and whether the landlord has met the timing requirements for billing. Ideally, a landlord is using a standardized lease so the majority of tenant’s have the same exact structure, but it is not always possible to accomplish that – anchors have more negotiating power, nationals or franchises may have their standard provisions, etc.
The reconciliation is where all of those provisions get applied. It is also where the gap between what the lease allows the owner to recover and what the owner is actually recovering becomes visible - if someone is paying attention.
Where NOI Gets Lost
Every lease provision that governs expense recovery is also a potential source of NOI leakage if it is not handled correctly.
The most common issues usually fall into a few categories.
1. Expense Inclusion and Exclusion
The first question in any reconciliation is straightforward:
Is this expense actually recoverable under the lease?
That sounds basic, but it is one of the most common areas where mistakes happen.
Capital expenses are a good example. As a general rule, capital expenses are not simply billed through CAM like ordinary operating expenses. But many leases include exceptions for certain cost-saving improvements, compliance-related work, or replacements that are amortized over time.
If those provisions exist and nobody reviews them, legitimate recovery income may be missed.
The opposite problem is just as important. If capital items are billed as ordinary operating expenses without lease support, the owner may be creating audit exposure and future refund obligations (in other words – your cash flow may not be as strong as you think).
Management fees are another common issue. They are often recoverable in NNN and modified gross leases, but many leases limit them. For example, a lease may cap the recoverable management fee at 3% of gross revenues. If the property management agreement charges 4%, that does not automatically mean the full 4% is recoverable from the tenant. Alternatively, the lease may allow an administrative fee on operating expenses in lieu of the management fee.
The same analysis applies to payroll, administrative charges, professional fees, shared costs, and other gray-area items. Some leases allow them. Some do not. Some allow them only under specific conditions – such as limiting recover to roles under a certain seniority level.
2. The Gross-Up Calculation
If the property had vacancy during the year, the gross-up provision can be one of the most important parts of the reconciliation. This is common in office properties.
The purpose of a gross-up is to prevent existing tenants from receiving a windfall simply because the building was not fully occupied (it can also help protect the tenant if the base year is grossed up). For example, certain variable expenses, such as utilities, cleaning, and some maintenance costs, may be lower when a property is only 75% occupied. But if the leases require those expenses to be grossed up to 95% occupancy, the reconciliation should reflect that.
If the gross-up is missed, the landlord may be absorbing costs that the lease allows it to recover. In a larger portfolio, that is a lot more than an accounting footnote. Of course, gross-ups need to be applied carefully. Not every lease has a gross-up clause. Not every expense is subject to gross-up. Fixed expenses like taxes, insurance, and certain management fees are typically not treated the same way as variable expenses.
This requires judgment. It also requires lease-by-lease review. A blanket approach across all tenants may be efficient, but it is not always accurate.
3. Expense Caps
Expense caps are another area where owners can lose money without realizing it.
A cap limits how much of an expense increase can be passed through to the tenant. It does not limit what the owner actually spends.
If expenses increase by 7%, but the lease caps the tenant’s increase at 5%, the difference is an ownership cost. That gap needs to be understood before it shows up as a negative variance.
The key is knowing how the cap works.
Does it apply to all recoverable expenses?
Only controllable expenses?
Specific categories?
Year-over-year increases?
Cumulative increases?
Cumulative caps deserve special attention. If a lease allows unused cap capacity to carry forward, that should be tracked every year. Otherwise, the owner may miss the ability to recover more in a future year when expenses spike.
Controllable versus non-controllable caps are also a common source of mistakes. If taxes, insurance, snow removal, utilities, or other categories are excluded from the cap, those items need to be separated before the cap is applied.
Again, the lease governs. This should be built into your budgeting and the reconciliation process from the beginning.
4. Base Year Mechanics in Modified Gross Leases
Modified gross leases bring another layer of complexity.
In many modified gross leases, the tenant pays its share of operating expenses above a base year or base stop. That means the reconciliation needs to track each tenant’s specific base year, which may vary depending on when the lease commenced.
One common mistake is applying a gross-up to the current year without applying the same methodology to the base year, where the lease requires it. That can distort the calculation.
Sometimes it overstates what the tenant owes, creating audit exposure. Other times it understates the recovery and suppresses NOI.
Base stops also need to be confirmed. If the lease establishes a fixed expense stop, that figure needs to be applied correctly. If it is missed, the reconciliation will be wrong every year until someone catches it.
This is one of those issues that can compound quickly over time.
In addition to the key lease terms mentioned above, one should be aware that:
Billing Presentation Matters
A well-prepared reconciliation statement should make it easy for the tenant to understand what was spent, what was recoverable, what the tenant’s share is, what the tenant already paid, and what balance is due or credit is owed.
At a minimum, the statement should show:
Total recoverable expenses
Tenant pro-rata share
Gross-up methodology (if any))
Cap calculation (if any)
Estimated payments made
Balance due or credit
Support backup (if required)
The supporting detail does not always need to be sent with the initial bill, but it needs to be organized and ready. If a tenant has audit rights and asks for backup, scrambling to recreate the file months later is not a good look. It slows collection, creates suspicion, and turns what should be a straightforward process into a dispute.
Timing also matters. Many leases require reconciliation billings to be delivered within a specific period after year-end - often 90 to 180 days. Hopefully the lease is drafted where this doesn’t lead to a waiver, but at a minimum, it can lead to strained relations (especially when the tenant owes money).
Tenant Audit Rights Should Not Be Feared
Most sophisticated tenants have some right to review or audit CAM charges. Owners sometimes view that as an adversarial provision. It does not have to be.
If the reconciliation was done correctly, the expenses are supportable, the methodology is documented, and the lease was followed, then an audit should be a review process - not a crisis.
The better approach is to be organized before the question comes. That means keeping the expense detail, gross-up calculation, cap calculation, allocation methodology, and lease support in a clean file.
Tenants remember how they are treated. A tenant that receives accurate, professional, well-supported reconciliations year after year is less likely to approach every billing with suspicion.
The goal is not to over-share or invite unnecessary review. The goal is to be ready, accurate, and professional when questions arise. Having said all this, a good practice is to prohibit audits from companies that are paid on a contingency fee, because it can often lead to “why not” audits that unnecessarily waste the resources of owners and managers.
The Bottom Line
The CAM reconciliation is where lease strategy, accounting and asset performance meet.
Every provision negotiated, inherited, or assumed at acquisition gets tested against real expenses and real tenants.
When the process is handled well, the owner collects what the lease allows, tenants receive clear support, disputes are reduced, and recovery income is protected.
When it is handled poorly, NOI leaks quietly and relationships can suffer.
If recovery income is coming in below budget, the reconciliation should tell you why. If it does not, that is the first problem to solve.
CAM reconciliations are not particularly exciting, but because they are one of the places where lease language, operations, accounting, and asset management all come together they are a critical component to overall management and performance.
This article is Part 2 of an ongoing series on approaching leases strategically. Part 1 covered lease structures and key provisions, including caps, base years, base stops, and the NNN spectrum. Coming installments will address lease economics, tenant protections, renewal mechanics, and other lease provisions that affect asset performance. This article is for general informational and educational purposes. Every asset is different, and the lease provisions governing any specific investment require careful legal and financial review. CRE Vertical Advisors works with property owners, family offices, and their advisors to evaluate these issues and connect lease strategy to asset performance.