Definition
Gross Potential Rent (GPR) is the maximum rental income a property could generate if every unit were occupied for the full period (typically a month or a year) at market rent or contract rent. GPR is a “top-of-the-funnel†figure—before subtracting vacancy, concessions, nonpayment, or other income adjustments.
How It’s Calculated
GPR is usually computed as the sum of each unit’s rent for the period. In underwriting, it’s common to use market rents for stabilized projections and current (in-place) rents for trailing performance snapshots.
Common formulas
- Monthly GPR = Σ (Unit monthly rent for all units)
- Annual GPR = Monthly GPR × 12
- Gross Potential Rent (simplified) = Number of units × Average market rent × 12 (use only if unit mix is fairly uniform)
GPR vs. EGI
GPR is not the same as what the property actually collects. Investors typically move from GPR to more realistic income metrics by applying standard “leakage†items.
Typical underwriting bridge
- GPR (100% occupied at stated rents)
- Less: Vacancy and credit loss (nonpayment / bad debt)
- Less: Concessions (free rent, discounts, move-in specials)
- Plus: Other income (fees, laundry, parking, RUBS, etc.)
- = Effective Gross Income (EGI)
Why It Matters
GPR is the baseline for assessing revenue potential. It helps investors quantify rent upside, estimate the impact of vacancy assumptions, and compare performance across assets with different unit counts and rent levels.
Investor Uses
- Rent gap analysis: compare in-place rents to market rents to estimate upside.
- Value-add planning: model renovations and the step-up in rents at stabilization.
- Sensitivity testing: stress vacancy, concessions, and rent growth against GPR.
- Market comparisons: normalize a property’s revenue capacity by unit mix and rent bands.
Example
A 20-unit property has an average market rent of $1,600/month. A simplified annual GPR is:
- Annual GPR = 20 × 1,600 × 12 = $384,000
If underwriting uses a 6% vacancy/credit loss assumption and 1% concessions, the “leakage†against GPR would be roughly 7% (before other income), reducing rent collection expectations by about $26,880 annually (384,000 × 0.07).
Common Pitfalls
- Ignoring unit mix: averaging rents can hide that studios and 2-beds behave differently.
- Using asking rents blindly: market rent should reflect achieved rents and concessions.
- Double-counting income: don’t include other income items inside “rent†and again as fees.
- Not adjusting for loss-to-lease timing: leases roll over time; upside is not instant.
- Overstating occupancy: GPR assumes 100% occupancy—always apply realistic vacancy/credit loss.