Gross-up provision: why a half-empty building bills like a full one

A gross-up provision restates the variable part of a building's operating expenses as if it were occupied to a stated level — commonly 95% or 100%, negotiated rather than standard — before each tenant's share is applied. The clause exists because most leases compute a share against total rentable area, so without it recovery drops simply because the landlord has empty floors.

Read the other way, it is a provision that increases what a tenant pays in a poorly let building. That is the intended effect and it is defensible on its own terms. What is not defensible is applying it to costs that would have been identical with the building full, which is where nearly all gross-up disputes live.

One building, two occupancy levels, one recovery

Two things fall out of the last rows. The grossed-up bill is stable at 58,000 whatever the occupancy, which is the design intent and also the diagnostic: if a grossed-up pool swings between a 60% year and a 90% year, either the variable-fixed split is wrong or the factor touched the wrong lines. Without the provision the same bill moves by 12,000.

Which costs move with occupancy, and which never notice

The middle row is the honest complication. Utilities usually contain a base building load that runs regardless and a marginal load that follows occupied floors, so a defensible gross-up splits the line rather than treating it as wholly variable or wholly fixed. A statement that treats every utility as fully variable is over-recovering, quietly.

The tax bill is the overreach to look for first

Property taxes and building insurance are assessed on the property, not on how much of it is let. A half-empty building attracts the same assessment. Applying a gross-up factor to those lines therefore invents expenditure that never existed and never would have — and because taxes and insurance are frequently the largest fixed items in a pool, the overreach is worth more than most of the arguments that get more attention.

How the factor reaches through an expense cap

Gross-up and caps interact in a way that surprises tenants who negotiated one and not the other. The cap constrains the increase; gross-up sets the figure the cap is measured against. Above, a cap computed on 580,000 permits a higher ceiling than one computed on the 440,000 actually spent — and a cumulative cap carries that higher base forward for the rest of the term. Which structure applies is the distinction in cumulative or non-cumulative expense caps, and it decides whether one grossed-up year is a one-off or a permanent lift.

Three numbers per year, and where they go missing

• Actual occupancy, on the basis the lease uses — area let, area occupied and rent-paying area are 3 different numbers.
• The gross-up target, stored per lease rather than per building: tenants in one building routinely have different targets.
• A variable flag and proportion per expense line — the field almost nobody keeps, and the reason gross-up cannot be recomputed later.
• The date the reconciliation arrived, with a named owner for the review window — the argument in who owns the date, not just who gets the email.

If the cost would have been the same with the building full, grossing it up bills a tenant for expenditure that never happened.

One practical consequence: an operating expense figure quoted to a prospect means nothing without the gross-up assumption behind it, which matters when the enquiry arrives outside office hours and something has to answer — the question in answering inquiries that arrive at eleven at night. The same holds for a stub period after expiry, where the share continues alongside whatever holdover rent the lease sets. Modelling this outside a spreadsheet that loses the variable flag is scope we take under internal tools and ops for property teams, with the rest of the lease administration topic.

• lease administration
• operating expenses
• gross-up
• commercial leases