A full service lease is a commercial real estate agreement in which the tenant pays one quoted rental rate that covers both occupancy and most of the building’s operating costs. The landlord takes that single payment and uses it to pay property taxes, building insurance, common area maintenance, utilities, and janitorial services. You get one bill, one number to budget around, and almost no administrative work tied to running the building. The structure is most common in multi-tenant office properties, especially Class A buildings. The catch, and it is a real one, is that the rate is only truly fixed for the first year; after that, a base year clause passes most cost increases through to you.
What the Rate Actually Covers
In a full service lease, the landlord folds operating expenses into the quoted rate rather than billing them separately. You see one number, write one check, and the landlord handles the vendors, tax bills, and maintenance schedules. A standard full service rate bundles the following:
- Property taxes on the building and land.
- The landlord’s building insurance covering the structure, common areas, and property liability.
- Common area maintenance for lobbies, hallways, elevators, restrooms, parking, and landscaping.
- Electricity, water, gas, and HVAC for the common areas and for your suite during standard business hours.
- Janitorial services for the common areas and typically nightly cleaning of your space.
- Property management fees for the staff or company running day-to-day operations.
The term “gross lease” is sometimes used interchangeably with full service, but the two are not always identical. Some gross leases carve out certain expenses or shift them back to the tenant. Ignore the label on the document and read the expense provisions line by line.
What a Full Service Lease Does Not Cover
The name creates an expectation that everything is included. It is not. Several categories almost always sit outside the landlord’s responsibility, and tenants who miss them end up with bills they did not plan for.
- After-hours HVAC. Heating and cooling during standard business hours (usually 8 a.m. to 6 p.m. weekdays) is included; running the system in the evening, on weekends, or on holidays is billed separately, and the charges can be substantial.
- Tenant improvements. Build-out, renovation, or customization of your space is your cost, though landlords often offer a tenant improvement allowance as part of lease negotiations.
- Your own insurance. The landlord’s policy covers the building, not your business. Landlords routinely require tenants to carry general liability coverage, often with minimums of $1,000,000 per occurrence and $2,000,000 in aggregate.
- Phone, internet, and data. Telecom infrastructure and service contracts belong to the tenant.
- Excessive utility consumption. If your equipment draws significantly more power than a typical office, the landlord may install a submeter and bill the overage.
- Signage and specialty services. A directory listing may be included; exterior signage, dedicated security, and private reception are not.
Capital expenditures deserve particular attention. Major structural repairs, roof replacement, and building-wide system upgrades are generally the landlord’s responsibility and should not appear in operating expense pass-throughs. Lease language varies, though, and some landlords amortize capital improvements over their useful life and include the annual amortization in operating expenses. Push for explicit exclusion of capital costs from any expense escalation calculation.
How the Base Year Turns a Fixed Rent Into a Variable One
This is where full service leases get more complicated than the “one simple payment” pitch suggests, and where most tenant mistakes happen.
Nearly every full service lease includes a base year, typically the first calendar year of the term. The landlord’s actual operating expenses during that year establish the benchmark the quoted rental rate was designed to cover. In every year after that, if total building operating expenses exceed the base year amount, you pay your proportionate share of the increase on top of the stated rent.
An example: say base year operating expenses run $12.00 per square foot. In year two, they rise to $13.00. A tenant leasing 3,000 rentable square feet owes an additional $3,000 that year ($1.00 × 3,000) beyond the quoted rent. Proportionate share is generally calculated by dividing your rentable square footage by the building’s total rentable square footage.
The base year caps the landlord’s exposure at year-one levels and sends every dollar above that through to tenants. It is not a flaw; it is the feature that makes landlords willing to quote an all-inclusive rate in the first place. But if you assume the rent will never move beyond scheduled escalations, you will be surprised.
Watch the Timing of Your Base Year
If a lease starts mid-year, say July 1, some landlords will treat that partial calendar year as the base year. A half-year baseline is artificially low, which means you start paying escalation charges almost immediately in the first full calendar year. Tenants signing in the second half of the year should push for the following full calendar year as the base year.
Gross-Up Provisions
A gross-up clause lets the landlord calculate variable operating expenses as though the building were at 95% to 100% occupancy, even when actual occupancy is lower. This matters most when you are moving into a newly constructed or partially leased building. Without gross-up language, base year expenses come in unusually low because few tenants are consuming utilities, generating trash, or riding elevators. As the building fills up, those costs jump and your escalation charges spike, even though the per-tenant cost has barely moved. A proper gross-up clause inflates the base year to reflect full-occupancy conditions so comparisons stay consistent. Confirm it applies to both the base year and subsequent years.
Rentable Versus Usable Square Footage
Before you evaluate any per-square-foot rate, know what the square footage figure actually represents. Commercial landlords price space using rentable square footage, not usable square footage.
Usable square footage is the area inside the walls of your suite, the space your business physically occupies. Rentable square footage adds your proportionate share of the building’s common areas: lobbies, hallways, elevator banks, restrooms, and mechanical rooms. The ratio between the two is the load factor, sometimes called the common area factor. In office buildings it typically runs between 1.10 and 1.20, meaning a 10% to 20% markup over usable space.
So a suite with 2,500 usable square feet in a building with a 1.15 load factor would be quoted at roughly 2,875 rentable square feet. At a $32 per square foot full service rate, you pay based on 2,875 ($92,000 annually), not the 2,500 you actually use. Tenants comparing quotes across buildings without normalizing for load factor can easily pick the worse deal. Ask for both figures and calculate the effective cost per usable square foot.
Full Service Compared to Other Lease Types
Commercial leases fall on a spectrum defined by who pays operating expenses. Knowing where full service sits helps you compare properties that may use different structures.
- Full service (gross) lease. One rate covers base rent and all standard operating expenses. The landlord manages everything. You may pay escalations above the base year, but the monthly bill is otherwise predictable.
- Modified gross lease. You pay base rent plus a negotiated subset of operating expenses. Splits vary; a common one has the tenant covering suite utilities and janitorial while the landlord handles taxes, insurance, and structural maintenance. An annual reconciliation compares estimated to actual expenses.
- Triple net (NNN) lease. You pay base rent plus your proportionate share of property taxes, building insurance, and common area maintenance, with utilities also on you. Standard in retail and industrial space; more transparent, less predictable.
Full service rates tend to be higher than NNN rates for the same building because the landlord is pricing operating expense risk into the rent. The real comparison is about who bears the risk of cost increases and how much administrative burden you want to carry.
What to Negotiate
Tenants have more room to negotiate full service leases than most realize, particularly in markets with elevated vacancy. A few provisions are worth pressing.
Cap Annual Escalations
An annual cap limits how much your share of operating expense increases can grow year over year, regardless of actual costs. A cap of 4% to 5% per year is a reasonable ask in most markets. Without one, a single year of sharp property tax reassessment or an insurance premium jump can blow up your budget.
Scrub the Base Year
Not every expense in the base year should count toward the benchmark. One-time items like casualty repairs, special assessments, or capital project amortization can distort the figure in either direction. Negotiate to exclude extraordinary items so the base year reflects normal, recurring operating costs.
Reset the Base Year at Renewal
When a lease comes up for renewal, the original base year may be five, seven, or ten years old. Operating costs have likely risen substantially, which means you are already paying significant escalation charges. A fresh base year tied to the renewal term resets the clock and can meaningfully reduce total occupancy costs.
Require Detailed Expense Statements
The lease should obligate the landlord to provide an itemized annual statement of actual operating expenses, broken down by category. Vague language promising a “summary” is not enough. Insist on line-item detail for taxes, insurance, utilities, janitorial, management fees, and repairs. Without it, you have no way to check whether escalation charges are accurate.
Exclude Capital Expenditures
The lease should state explicitly that roof replacement, structural repairs, building system overhauls, and construction defect corrections are excluded from operating expense calculations. Some landlords will agree to exclude capital items entirely; others will insist on passing through amortized costs for improvements “reasonably expected to reduce operating expenses,” such as energy-efficient equipment. Either way, get the treatment in writing.
Audit Rights and Expense Verification
Even a well-negotiated lease is only as protected as your ability to verify the landlord’s numbers. Audit rights give you or your accountant access to the landlord’s financial records for operating expenses, including vendor invoices, tax assessments, insurance policies, utility bills, and internal cost allocation reports.
A strong audit clause covers several points. You need enough time after receiving the annual expense statement to decide whether to audit, typically 30 to 90 days to give notice and 180 days or more to complete the review. Specify how far back the audit can reach, with two to three years being common. And if an audit reveals an overcharge above a negotiated threshold, often 3% to 5%, the landlord should reimburse your audit costs up to a cap.
When an audit uncovers overpayments, you should receive a credit against future rent or, if the lease has ended, a direct refund. Expect the landlord to want a way to dispute findings; arbitration is the common mechanism and avoids the cost and delay of litigation. Skipping the audit clause means trusting the landlord’s accounting on faith, and operating expense overcharges happen more often than most tenants expect.