What Is Included in CAM Charges? A Commercial Lease Guide

What are CAM charges in a commercial lease?

CAM stands for common area maintenance. In a multi-tenant property, some spaces belong to no single tenant: parking lots, sidewalks, lobbies, hallways, restrooms, landscaping and loading areas. Someone has to clean, light, repair, insure and manage them. In most retail and many office and industrial leases, the landlord does the work and bills each tenant a share of the cost on top of base rent.

You usually pay CAM monthly as an estimate, one twelfth of the landlord's projected annual cost for your share. After the year ends, the landlord compares the estimates with actual spending and sends a reconciliation: a bill if costs ran higher, a credit if they ran lower. That structure means your CAM is never fixed. It follows the landlord's real spending, and the lease definition decides which spending counts.

What is included in CAM charges?

A typical, reasonable CAM definition covers the actual cost of operating and maintaining the shared parts of the property. Items you should expect to see:

• Parking lot sweeping, restriping, lighting, sealing and pothole repair.
• Landscaping, irrigation, tree trimming and snow and ice removal.
• Janitorial service and trash removal for common areas, lobbies and shared restrooms.
• Electricity, water and gas used by common areas, such as exterior lighting and lobby heating and cooling.
• Security patrols, cameras and alarm monitoring for the common areas.
• Routine repairs and maintenance of common area elements, such as sidewalks, fences, signage pylons and elevators.
• Property management, either as actual costs or as a fee calculated as a percentage of operating costs or rent.
• Sometimes, an administrative fee, often a percentage added on top of the other CAM costs.

Do CAM charges include property taxes?

Often not, at least by name. In a triple net lease, property taxes, the landlord's building insurance and CAM are usually three separate categories, each billed as its own line. That is where the "three nets" come from. So the strict answer to whether CAM charges include property taxes is usually no.

In practice, though, many leases roll everything into one broader defined term, such as "Operating Expenses" or "Additional Rent," and that term often does include real estate taxes. Some landlords also quote a single "CAM" or "NNN" figure per square foot that bundles taxes and insurance together. The label on the invoice tells you very little. What matters is the definition in the lease and the breakdown in the annual reconciliation.

Two practical checks help. First, ask for the current tax bill and the parcel's assessment history, so you can see whether a reassessment is coming. Second, ask whether a sale of the property can raise the tax line. In some states, a change in ownership can trigger reassessment. If so, consider asking that tax increases caused by a sale during your first several years be excluded from your share.

Which costs are usually in CAM, and which are billed separately?

Lease language varies, so treat this table as a starting point for reading your own definition, not a rule.

How is your share of CAM calculated?

Your share is normally your pro rata share: the rentable square footage of your space divided by the rentable square footage of the property. A 2,000 square foot shop in a 40,000 square foot center has a 5 percent share. If the center's annual CAM is $160,000, your share is $8,000, or $4 per square foot.

The denominator is where shares quietly grow. If the lease divides costs only among leased space, or excludes large anchor tenants who maintain their own areas, the remaining tenants absorb more. Ask that the denominator be the total rentable area of the property, whether leased or vacant, and that any carve-outs be named in the lease.

Watch for a gross-up clause too. It lets the landlord calculate costs that vary with occupancy, such as janitorial and common utilities, as if the building were mostly full. Applied correctly, it stops early tenants from paying for empty units. Applied to fixed costs, or allowing recovery above actual spending, it becomes a profit line.

What should never be included in CAM charges?

The most valuable part of a CAM definition is its list of exclusions. Without one, the landlord can argue that almost any cost of owning the property is a common area cost. The exclusions tenants most often secure:

• Capital improvements and replacements, or at most their cost spread over useful life, and only when they save operating costs or are required by a law passed after you sign.
• Repairs needed because of construction defects, or covered by warranties or insurance proceeds.
• The landlord's mortgage payments, ground rent, depreciation and income taxes.
• Leasing commissions, advertising for vacant space and the cost of building out other tenants' spaces.
• Legal fees for disputes with other tenants or the landlord's lender.
• Fines or penalties caused by the landlord's own violations.
• Any administrative fee charged on top of a management fee for the same work.

How do CAM reconciliations and audits work?

The annual reconciliation is your chance to test the landlord's numbers. A good statement lists each cost category, the total for the property, the denominator used and your resulting share. If yours arrives as one figure with no breakdown, ask for the detail in writing.

Your lease should give you a CAM audit right: the ability to review the landlord's books for a set period after each statement. Common tenant requests include a window of at least 90 days to object, the right to use an accountant who is not paid on contingency if the landlord insists, and a rule that the landlord pays the audit cost if the overcharge exceeds an agreed threshold. Ask too for a deadline on the landlord's side, so costs it fails to bill within a set period after year end cannot be added years later.

A CAM cap limits how much controllable costs can rise each year, often by a fixed percentage. Uncontrollable items such as taxes, insurance and utilities are usually left outside the cap. A non-cumulative cap, where each year stands on its own, protects you more than a cumulative one that lets unused increases carry forward.

Why do CAM charges go up every year?

Even with no change in the property, CAM tends to rise. Labor for landscaping, cleaning and security gets more expensive, utility rates change, and older parking lots and roofs need more frequent repair. Those are legitimate increases, and a cap on controllable costs is the usual way to keep them predictable.

Other increases come from the definition rather than the property. A management fee calculated as a percentage of gross revenue rises automatically when rents rise. A new owner may bring in a different management company with higher fees, or start charging items the previous owner absorbed, such as a marketing fund or reserves for future repairs. A building that loses tenants may also shift more of the cost onto those who remain if the denominator excludes vacant space. When a reconciliation shows a jump of more than a few percent, ask which line items moved and why before you pay it. A landlord that cannot explain an increase in writing is a landlord whose numbers deserve a closer look.

Are CAM charges taxable?

In most states, no sales tax applies to commercial rent at all, but a few states have taxed it, and where they do, CAM can be part of the taxable amount. Florida was the main example. Section 212.031 of the Florida Statutes taxed commercial rent, including pass-through charges such as CAM, until it was repealed by HB 7031 (2025) for rental periods beginning on or after October 1, 2025. Rent for earlier periods stayed taxable even if paid later, so Florida tenants should check that 2025 reconciliations do not add tax to post-repeal months. Rules change, so confirm how your state treats commercial rent as of 2026 with a tax advisor.

How to check CAM charges before you sign

The Commercial Lease analyzer reports how your agreement defines CAM, whether there is a cap and what type, the admin fee, the exclusions and whether you have an audit right, quoting each clause. You can see the cost structure before you commit to it and use the landlord's own figures to estimate the rest. Our free commercial lease agreement template shows one balanced way to draft these terms. This guide is general information, not legal or tax advice.

• Ask for the last two or three years of actual reconciliations, not only the current estimate.
• Read the operating expense definition and its exclusions before you negotiate the rent, because the two together are your real cost.
• Ask for a non-cumulative cap on controllable CAM, a cap on management or administrative fees and a clear audit right.
• Confirm the pro rata share calculation and any carve-outs for anchor tenants.
• Model a bad year: what happens to your monthly cost if CAM rises 15 percent and the property is reassessed?