Gross Potential Rent Calculator

Gross potential rent is the first line of any multifamily NOI stack — every unit at market rent, fully occupied. Compute it from the unit mix and market rents per bedroom type. This calculator also shows unit-type contribution to total revenue, which flags unit mix risk concentration.

1BR units

1BR market rent / month

2BR units

2BR market rent / month

3BR units

3BR market rent / month

Annual gross potential rent

$873,600

Monthly GPR

$72,800

Weighted average rent / unit

$1,820

1BR contribution to GPR

44.0%

2BR contribution to GPR

42.9%

3BR contribution to GPR

13.2%

How the math works

Gross potential rent is the sum of every unit at market rent, 100% occupied. It is the theoretical revenue ceiling. Underwriters subtract loss to lease, vacancy, concessions, and credit loss from GPR to arrive at effective gross income.

GPR calculation requires a rent roll that reflects market rent on every unit type — not in-place rent. Pull comps to validate that 'market rent' is actually achievable in current conditions.

How to Use

Enter number of 1BR, 2BR, and 3BR units.
Enter market rent for each unit type (not in-place).
Read annual GPR, weighted average rent, and per-unit-type contribution.

Frequently Asked Questions

Why use market rent?

GPR is a theoretical ceiling — it doesn't reflect what leases actually pay. Using in-place rent understates the property's upside and confuses loss-to-lease math. Always use market rent pulled from competitive comps.

Should studios/4BRs be included?

Yes — if the property has them. This calculator handles 1-3BR units for simplicity; for complex mixes, sum each type separately and add. Studios, 4BRs, townhomes all contribute to GPR.

What about model units?

Model, employee, and maintenance-occupied units still contribute to GPR (at market rent). They become vacancy/employee expense line items separately — don't zero them out of GPR.