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  5. /Gross-Up vs Actual Expenses

Gross-Up vs Actual Expenses

Last updated: April 2026

By Angel Campa, Founder

Gross-ups adjust expenses for vacancy but are frequently miscalculated. Actual expenses are simpler but can unfairly burden tenants in low-occupancy buildings.

Gross-Up

A gross-up provision allows the landlord to adjust variable operating expenses to reflect what they would be if the building were fully occupied (typically 95% occupancy). This prevents existing tenants from subsidizing vacant space by spreading costs across a hypothetical full-occupancy base.

Advantages

  • ✓Protects tenants from paying disproportionate shares when occupancy is low
  • ✓Creates a more equitable distribution of variable expenses among occupied tenants
  • ✓Standard practice recognized by BOMA and most commercial lease professionals

Disadvantages

  • ✗Complex calculation that is frequently done incorrectly by landlords
  • ✗Only applies to variable expenses, but landlords sometimes gross up fixed costs too
  • ✗Tenants may not realize they are being double-charged if the gross-up is misapplied

Actual Expenses

Actual expense pass-throughs bill tenants for their proportionate share of real, incurred operating costs without any occupancy adjustment. The total expense pool equals exactly what the landlord spent, and each tenant's share is calculated from that actual total.

Advantages

  • ✓Simpler to calculate and verify
  • ✓No risk of gross-up math errors or improper application
  • ✓Transparent, dollar-for-dollar accounting of real costs

Disadvantages

  • ✗Tenants in low-occupancy buildings pay more per square foot than they should
  • ✗Subsidizes vacant space since costs do not scale linearly with occupancy
  • ✗Creates unfair burden shifts when major tenants move out

Side-by-Side Comparison

DimensionGross-UpActual Expenses
Expense basisAdjusted to hypothetical full occupancyBased on real costs incurred
Occupancy impactNormalizes for vacancyOccupied tenants absorb vacancy costs
Calculation complexityHigh, requires identifying variable vs. fixed expensesLow, straightforward proportionate share
Common errorsGrossing up fixed expenses, wrong occupancy figureNone specific to this method
Audit focusVerify which expenses were grossed up and the occupancy rate usedVerify total expense amounts and proportionate share

How This Affects Your CAM Charges

Gross-up provisions are one of the most error-prone areas in CAM reconciliations. Landlords frequently gross up expenses that should not be adjusted (like fixed insurance premiums or property taxes), use incorrect occupancy figures, or fail to apply the gross-up at all when occupancy is high. Each of these errors inflates the tenant's share beyond what the lease permits.

Which Exposes You to More Risk?

Gross-up calculations, when done incorrectly, create larger overcharges than actual expense pass-throughs. A landlord who grosses up fixed expenses to a 95% occupancy standard when the building is 70% occupied can inflate the expense pool by 25% or more. Actual expense pass-throughs are simpler but can still hurt tenants in buildings with high vacancy.

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Frequently asked questions

This page provides general educational information. It is not legal advice and may not reflect the most current law in your state. Consult a licensed attorney for advice specific to your situation.