Understanding CAM Charges: What Baton Rouge Tenants Actually Pay For Beyond Base Rent
Our July piece on commercial lease types introduced CAM as one of the three nets in an NNN deal and told you to ask how it is calculated. Fair warning, that is not the same as understanding it. CAM is where the real dollars move on a triple net lease, and it is also where the most disputes start, because “common area maintenance” means something different on every landlord's rent roll. Here is what is actually in that number, how your share gets built, and what to ask before you sign.
What CAM Actually Covers
Common area maintenance is the cost of running the shared parts of the property, the parts every tenant uses but no single tenant controls. In a typical Baton Rouge retail center or office park, that means parking lot maintenance and re-striping, common area landscaping, exterior lighting, sidewalk and common area repairs, trash and dumpster service, common area pest control, and a property management fee, usually a percentage of gross rents or of the CAM total itself. Some leases fold in a reserve for the parking lot resurfacing or the sign monument nobody has touched since the Bush administration. That is normal. What is not normal is everything in the next section.
What Should Not Show Up on Your CAM Statement
Capital improvements to the building itself, a new roof, foundation work, structural repairs, generally do not belong in an annual CAM pass-through. We said it in our lease types breakdown and it is worth repeating here: roof and structure stay on the landlord's side of the ledger, in every lease structure, no exceptions worth negotiating away. If a landlord wants to pass through a capital item, the market-standard approach is to amortize it over its useful life at a reasonable rate and pass through only that year's slice, not the whole invoice. Leasing commissions, the landlord's legal fees for someone else's default, and debt service have no business in CAM either. Debt service is never a CAM item, no matter what the label on the line item says.
How Your Share Gets Calculated
Your CAM bill is your pro rata share, your leased square footage divided by the gross leasable area of the property, applied to the total CAM pool. Straightforward, until you hit a gross-up provision. If the center is not fully occupied, a well-drafted lease lets the landlord gross up the variable expenses, the ones that scale with occupancy, to what they would be at 95 to 100 percent full. That protects you. Without it, a half-empty center dumps its full CAM burden on the few tenants who showed up, and your pro rata share balloons for reasons that have nothing to do with your space. Ask whether the gross-up applies, and get the occupancy percentage it grosses up to in writing.
Controllable vs. Non-Controllable, and Why the Cap Matters
Property taxes and insurance are non-controllable. The landlord does not set the parish's assessment or the premium your insurer quotes, so you will not find a cap on those two anywhere in this market. Insurance has been one of the three I's, Inflation, Interest Rates and Insurance, working South Louisiana leases hard for several years now, and that line item is not softening. Controllable expenses, landscaping, management fees, repairs, are a different conversation. A cap on annual increases in controllable CAM, typically in the 3 to 5 percent range, is one of the most valuable and least requested concessions in a Baton Rouge lease. Ask for one. And ask whether it is cumulative, unused increase carries forward to
future years, or non-cumulative, use it or lose it. The two versions can move your five-year exposure by real money.
The Reconciliation Nobody Reads
You pay CAM monthly as an estimate. Once a year the landlord reconciles that estimate against actual expenses and sends you a true-up statement, either a bill or a credit. This is where tenants get surprised, not because the number moved, but because nobody looks at the backup until the check clears. Your lease should give you audit rights, the ability to request the supporting invoices and, if something looks off, to formally dispute the statement within a defined window, 60 to 90 days is standard. If your lease is silent on audit rights, that is a gap worth closing before you sign, not after your third reconciliation statement arrives with a number you cannot explain.
What to Ask Before You Sign
Get the trailing three years of CAM history from the landlord, not just this year's estimate. Ask what is excluded from the pool. Ask whether the cap, if there is one, is controllable-only. Ask how the property management fee is calculated and on what base. None of this is unusual to ask, and a landlord with clean books will not blink at the request. The one who does is telling you something.
The Bottom Line
CAM is not a rounding error. A deal quoted at $25.00 per square foot in base rent can easily carry another $5.00 to $7.00 per square foot once CAM, taxes, and insurance are layered on, and where you land in that range depends on how well the lease defines the number, not on luck. Get the definition right before you sign and you will not be arguing about it in year three. If you want someone reading that language for you before it becomes your problem, that is what tenant representation is for.
Talk CAM with Momentum: (225) 408-6595 | momentum-commercial.com
Charlie Colvin is a CCIM and Principal at Momentum Commercial Real Estate in Baton Rouge. Momentum specializes in commercial leasing, sales, and investment throughout the Greater Baton Rouge market. Market data sourced from the 2026 Baton Rouge TRENDS in Real Estate report.