Updated August 2026.
Three sets of initials decide most of what a commercial lease actually costs beyond base rent. This guide defines each one plainly, then goes deeper where the detail matters.
What does CAM stand for in commercial real estate?
CAM stands for Common Area Maintenance. It is additional rent, charged on top of base rent, covering the cost of operating and maintaining the areas of a property that all tenants share. Each tenant pays a pro rata share, normally calculated as its rentable square footage divided by the building total rentable square footage.
CAM typically covers parking lot maintenance and striping, exterior and common area lighting, landscaping, lobby and walkway cleaning, elevators, common restrooms, common area utilities, security, and a property management fee.
Tenants commonly negotiate to exclude capital expenditures, new construction elsewhere in the property, on-site employee salaries, leasing commissions and brokerage fees, and utility impact fees. The management fee, often a percentage of total CAM, is one of the most negotiated line items in the entire charge.
CAM charges are normally billed monthly as an estimate, then reconciled once a year against actual expenses. How much CAM can rise each year depends on the cap structure in your lease, and the difference between a cumulative and a non-cumulative cap is larger than most tenants expect.
What is TICAM?
TICAM stands for Taxes, Insurance, and Common Area Maintenance, the three cost buckets a tenant reimburses on top of base rent. Plain CAM refers only to the third of those; TICAM bundles all three.
Here is the part most explanations leave out: TICAM is regional terminology, not a national standard. Every locatable source defining the term originates in the Carolinas or the wider Southeast. One Charlotte-based advisory states plainly that TICAM is the term you will see most often in Charlotte and across the Southeast, while NNN or triple net is the terminology used nationally.
In Southern California you will rarely see TICAM in a lease. The same economics are expressed as NNN, as operating expenses, or as CAM plus taxes and insurance. If a Southern California tenant is handed a lease using TICAM language, it usually means the landlord is a Southeast-based owner or a national REIT working from Carolinas-originated forms, which is worth knowing, because the rest of the document is likely to follow conventions that differ from local AIR CRE practice.
We should be straight about sourcing here: there is no BOMA, IREM, ICSC, CCIM or ABA definition of TICAM. Every substantive published source is brokerage or law firm commentary. That is unusual, and it matters in a negotiation: there is no authority to appeal to, so the lease own definition controls entirely. Make sure the lease defines it.
What are TI and a tenant improvement allowance?
TI stands for Tenant Improvements, the physical build-out that adapts a space to a specific tenant use. TIA is the Tenant Improvement Allowance, the landlord contribution toward that work, quoted in dollars per rentable square foot.
The single most useful number for a Southern California tenant in 2026 is the gap between the two:
| Benchmark | Amount | Source |
|---|---|---|
| Average office TI allowance (national) | $87.51 /SF | CBRE, FY2024 data, published March 2025 |
| Office fit-out cost, Los Angeles | $188 /SF | Cushman & Wakefield, Office Fit Out Cost Guide: Americas 2026 |
That gap is the tenant out-of-pocket exposure, and it is why negotiating an allowance against a market benchmark rather than a costed construction plan is a mistake.
How allowances are structured
- Turnkey build-out. The landlord designs, manages and delivers the finished space to an agreed specification. Lower tenant risk, less tenant control, and building standard finishes vary enormously by landlord.
- Reimbursement. The tenant manages construction and draws against the allowance on completion, usually against lien releases. More control, more risk, and the tenant carries the cost until reimbursement.
- Amortized allowance. The landlord funds above-standard work and recovers it through rent over the term, effectively a loan at a negotiated rate. Check the implied interest rate, it is often higher than the tenant own cost of capital.
- Rent credit or carryover. Unused allowance offsets rent. Frequently requested, less frequently granted, and normally capped.
How do rent escalations work?
Escalations determine how rent rises over the term. Three structures dominate:
- Fixed escalation. A set amount or percentage on an agreed schedule. Commonly cited at 2% to 3% annually. Simple and predictable; does not track the market.
- Indexed escalation (CPI). Rent adjusts with the Consumer Price Index. Tenants generally resist this, and recent history shows why: CPI rose 1.4% year over year in January 2021 and 7.5% in January 2022. If you accept a CPI clause, negotiate a collar: a floor and a ceiling.
- Pass-through escalation. Triggered only when the landlord specified costs rise. Most common where the tenant already reimburses operating expenses.
Many leases combine a fixed or indexed escalation on base rent with a pass-through escalation on additional rent. We should be candid that the 3% for office, 3–4% for industrial figures brokers quote are market convention rather than published data: we could not locate a 2026 escalation survey broken out by property type from any major research house.
The California issue nobody outside California thinks about: Proposition 13
This is the most consequential thing on this page for a Southern California tenant, and it appears in almost no national lease guide.
Proposition 13 caps annual increases in a property assessed value at 2%, but triggers full reassessment to market value on a change of ownership. For a California property held for decades, the gap between assessed value and market value can be enormous. When that building sells mid-lease, property taxes can jump by a multiple overnight. And under a NNN or CAM structure with a tax pass-through, the tenant absorbs it.
Two things make this worse than it first appears:
- The triggers are broader than a sale. Reassessment can be caused by transfers of 50% or more of the ownership interests in the landlord entity, and by other structural changes. A tenant who negotiates protection only against sales has left the exposure wide open.
- The exposure is a capital risk, not an operating one. At a 6% cap rate, every $10,000 of annual income lost to an unrecoverable tax increase moves roughly $167,000 of asset value. Tenants and landlords are negotiating over principal, not over an expense line.
Common negotiated protections include excluding only the first reassessment event during the term, capping the tenant exposure by dollar amount or percentage, limiting reassessment pass-throughs to once in a defined period such as five years, and giving the landlord a buy-down right. Thomson Reuters Practical Law maintains both pro-tenant and pro-landlord California-specific Proposition 13 clause sets, which tells you how routinely and how hard this gets negotiated.
There is a drafting trap on the landlord side too: language intended to exclude only the reassessment-driven increase can, if carelessly written, freeze the tax pass-through entirely.
What is a gross-up clause?
Where a building is under-occupied, a gross-up clause recalculates variable operating expenses to what they would have been at an assumed occupancy, conventionally 95% to 100%, negotiated: before allocating them among tenants. Utilities, janitorial, trash removal and management fees are grossed up; property taxes and insurance are not.
Counterintuitively, this often protects the tenant. In a base-year lease, a tenant taking space in a half-empty building sets an artificially low base year and then absorbs a steep increase as the building fills: an increase reflecting occupancy, not inflation. Grossing up the base year prevents that. The absence of a gross-up clause is frequently worse for the tenant than its presence.
What is a TI/LC reserve?
A Tenant Improvement and Leasing Commission reserve is a lender-controlled escrow in a commercial mortgage loan agreement, funding future TI costs and leasing commissions as leases roll. The borrower funds it through monthly installments or lump sums, and disbursements are conditioned on lease compliance, cost reasonableness and lien-free completion. It exists to ensure capital is available to re-tenant space and preserve net operating income. Tenants encounter it indirectly: a landlord whose TI/LC reserve is depleted may have less flexibility on your allowance than the market would suggest.
Frequently asked questions
What does CAM stand for in commercial real estate?
CAM stands for Common Area Maintenance. It is additional rent covering the cost of operating and maintaining shared areas of a property, parking, landscaping, lighting, common area cleaning, elevators, security and property management. Each tenant pays a pro rata share based on its square footage relative to the building total.
What does CAM stand for in property management?
The same thing: Common Area Maintenance. In a property management context CAM refers to the operating expense pool that is billed out to tenants monthly as an estimate and reconciled annually against actual costs.
What is TICAM in real estate?
TICAM stands for Taxes, Insurance, and Common Area Maintenance: the three categories of cost a tenant reimburses beyond base rent. It describes the same economics as a triple net (NNN) lease; TICAM names the cost buckets while NNN names the lease structure. TICAM is regional terminology used predominantly in the Carolinas and the Southeast rather than a national standard, and it is rarely seen in Southern California leases.
What is the difference between CAM and TICAM?
CAM covers only common area maintenance. TICAM covers taxes and insurance as well. If your lease says CAM but separately passes through property taxes and insurance, your total obligation is the same as TICAM: the terminology differs, not the economics.
What is a CAM gross-up?
A gross-up clause recalculates variable operating expenses as if the building were 95% to 100% occupied before allocating them among tenants. Variable costs like utilities and janitorial are grossed up; fixed costs like taxes and insurance are not. In a base-year lease this generally protects the tenant, by preventing an artificially low base year in an under-occupied building from producing a steep apparent increase later.
What should a CAM letter to tenants include?
An annual CAM reconciliation should arrive within roughly 90 to 120 days of the lease year end and should show actual prior-year expenses broken down by category, your pro rata share calculation, a comparison of estimated versus actual with the true-up amount, the new monthly estimate for the coming year, and confirmation that supporting invoices are available on request. A single unexplained number is grounds to exercise your audit or information rights immediately.
Can a California landlord pass a property tax reassessment on to me?
Under a NNN or CAM lease with a tax pass-through, generally yes, and under Proposition 13 a change of ownership triggers full reassessment to market value, which can multiply the tax bill on a long-held property. Reassessment triggers include transfers of 50% or more of the ownership interests in the landlord entity, not just outright sales. California leases routinely negotiate Proposition 13 protection clauses, and both pro-tenant and pro-landlord standard forms exist.
How much is a typical tenant improvement allowance?
The most recent published national benchmark for office is $87.51 per square foot (CBRE, FY2024), down from a 2023 peak of $97.55 but still about 30% above pre-pandemic levels. Los Angeles office fit-out costs approximately $188 per square foot, so the allowance rarely covers a full build-out. No credible published benchmark exists for retail or industrial TI allowances, those have to be derived from comparable deals in the specific submarket.
What is a TI/LC reserve?
A Tenant Improvement and Leasing Commission reserve is a lender-controlled escrow in a commercial mortgage loan agreement that funds future tenant improvement costs and leasing commissions as leases roll. It protects the lender by ensuring capital exists to re-tenant space and maintain net operating income.
Talk to someone before you sign
CAM structure, escalation formula and Proposition 13 exposure are all negotiable, and all three are easier to fix before signature than after. Browse current listings or contact KEYZ Commercial for a lease review.
Sources
- Hunton Andrews Kurth LLP, Considerations When Negotiating Common Area Maintenance Costs in Retail Leases, 8 June 2018
- Marc E. Betesh & Nancy M. Davis, Negotiating Common Area Maintenance Costs, Probate & Property, American Bar Association, May/June 2009
- Fowler Property Advisors, What Is TICAM?, May 2026; Lee & Associates Greenville, TICAM Fees, 28 May 2024
- CBRE, Office Building Owners Offering Fewer Concessions to Tenants, 6 March 2025
- Cushman & Wakefield, Office Fit Out Cost Guide: Americas 2026, March 2026
- Ashley S. Wagner, Tucker Arensberg, State of Rent Escalation Clauses, Best Lawyers, 23 July 2025
- Lowndes, Grossing-Up Operating Expenses in Commercial Leases, 9 August 2023; Holland & Hart, Gross-Up Provisions in Commercial Leases
- Thomson Reuters Practical Law, Proposition 13 Real Property Tax Reassessment Protection Clauses (Commercial Lease), pro-tenant and pro-landlord CA sets
- Thomson Reuters Practical Law, Tenant Improvement and Leasing Commission Reserve