Economic occupancy is the percentage of a property's gross potential rent that it actually collects, calculated as collected revenue divided by gross potential rent. It measures the rent that reaches the bank account, not the number of units filled. Economic occupancy is almost always lower than physical occupancy and is the figure underwriting relies on.
How Is Economic Occupancy Calculated?
Economic occupancy is calculated by dividing actual rental revenue collected by gross potential rent, then multiplying by 100. The formula is Economic Occupancy = (Collected Revenue / Gross Potential Rent) x 100. Gross potential rent assumes every unit is leased at market rent with zero vacancy, concessions, or collection loss, so it is the theoretical revenue ceiling.
The gap between the ceiling and the collection has named causes. Per MRI Software and Wall Street Prep, three items pull economic occupancy below physical occupancy: loss to lease, where in-place rents sit below market; concessions, such as free rent months where a unit is occupied but pays nothing; and bad debt, where a tenant occupies but does not pay.
Component | Effect on economic occupancy |
Vacancy | Empty units collect no rent |
Loss to lease | In-place rent below market rent |
Concessions | Free rent or discounts on occupied units |
Bad debt | Occupying tenants who do not pay |
Per MRI Software, bad debt typically runs 1% to 3% of gross potential rent in a healthy market and can exceed 5% in distressed situations. Each component is a leak between a full building and a full deposit.
Why Economic Occupancy Matters
Economic occupancy matters because it reflects the cash a property produces, and cash drives value. A building can show 95% physical occupancy while collecting only 88% of potential rent, and it is the 88% that services debt and sets net operating income. Lenders underwrite to economic occupancy because a full building that does not pay cannot cover a loan.
The leverage is direct. Economic occupancy sets effective gross income, effective gross income sets NOI, and under the income approach value equals NOI divided by a cap rate. A seven-point gap between physical and economic occupancy on a $1,000,000 gross potential rent is $70,000 of income that never arrives, and at a 6% cap rate that is more than $1,100,000 of value the physical number would falsely imply.
This is why a rent roll showing full occupancy is not enough. An operator confirms what the building collects, not what it houses. Physical occupancy tells you the units are leased. Economic occupancy tells you they pay.
Example
A 100-unit apartment building has gross potential rent of $1,800,000 per year at market rates. The property is 95% physically occupied, but concessions, below-market in-place rents, and bad debt reduce collections. The table walks the revenue leaks and the resulting economic occupancy.
Line | Calculation | Amount |
Gross potential rent | 100 units at market rent | $1,800,000 |
Less vacancy (5%) | 5% of $1,800,000 | ($90,000) |
Less loss to lease | Below-market in-place rents | ($54,000) |
Less concessions | Free rent on occupied units | ($36,000) |
Less bad debt (2%) | 2% of $1,800,000 | ($36,000) |
Collected revenue | 1,800,000 - 216,000 | $1,584,000 |
Economic occupancy is $1,584,000 / $1,800,000 = 88.0%. The building is 95% physically occupied but only 88% economically occupied. That seven-point gap, $216,000 in leaked revenue, is invisible on a headcount and decisive on a cash flow.
Variations and Edge Cases
Economic occupancy shifts with lease-up stage and market conditions. During lease-up or in a competitive submarket, heavy concessions can push economic occupancy several points below physical, per HelloData, so a stabilized figure and a lease-up figure describe very different assets.
Situation | Effect |
Stabilized property | Gap of roughly 3 to 7 points is common |
Lease-up with concessions | Concessions can widen the gap materially |
Distressed asset | Bad debt above 5% widens the gap |
Rent-controlled units | Persistent loss to lease depresses the figure |
Gross potential at asking vs market | Overstated GPR understates economic occupancy |
The recurring error is measuring economic occupancy against an inflated gross potential rent set at asking rather than achievable market rent. That understates the true collection efficiency and distorts every comparison.
Economic Occupancy vs Physical Occupancy
Economic occupancy is often confused with physical occupancy, but they measure different things. Physical occupancy is occupied units divided by total units, a headcount of leased space. Economic occupancy is collected revenue divided by gross potential rent, a measure of the cash the property actually earns.
The difference is bodies versus dollars. A unit occupied under a free-rent concession counts as full for physical occupancy but zero for economic occupancy. Economic occupancy is almost always the lower number and is the one that underwriting and lenders trust, because it reflects income, not merely tenancy.
Frequently Asked Questions
What is the formula for economic occupancy?Economic occupancy equals collected revenue divided by gross potential rent, multiplied by 100. It measures the share of theoretical maximum rent a property actually collects after vacancy, loss to lease, concessions, and bad debt.
Why is economic occupancy lower than physical occupancy?Economic occupancy is lower because a physically full building still loses rent to below-market leases, free-rent concessions, and non-paying tenants. Physical occupancy counts occupied units; economic occupancy counts only the rent that is actually collected.
What is a good economic occupancy rate?A stabilized economic occupancy in the low-to-mid 90s is generally healthy, with a gap of roughly 3 to 7 points below physical occupancy. A wider gap signals heavy concessions, deep loss to lease, or elevated bad debt.
Related Terms
Gross Potential Rent
Physical Occupancy
Loss to Lease
Net Operating Income
Effective Gross Income