Effective Gross Income (EGI) is the total potential rental income from a property minus actual vacancy losses and bad debt (uncollected rent). Unlike Potential Gross Income, which assumes 100% occupancy, EGI reflects real-world conditions and provides a more accurate picture of what a property actually generates. This makes it the preferred metric for underwriting rental properties and making investment decisions.
How It Works
The calculation is straightforward: start with Potential Gross Income (all units fully rented at market rates), then subtract vacancy losses based on historical or market data, and subtract credit losses from tenants who don't pay. The result is EGI—the money actually available to pay operating expenses, debt service, and generate profit. Most lenders and institutional investors require EGI calculations before approving loans or commitments.
Vacancy rates vary by market and property type. Apartment buildings might assume 5-7% vacancy, while office or retail can be 10-15%. Conservative investors often use market-high vacancy rates to stress-test deals and ensure viability even in downturns.
Why It Matters for Investors
EGI directly impacts property valuation and your expected returns. A property's value is often calculated using the income approach: EGI minus operating expenses divided by a capitalization rate (cap rate). A more realistic EGI leads to more accurate valuations and better investment decisions. Overestimating EGI is a common mistake that leads to overpaying for underperforming assets.
When comparing two properties, always use EGI rather than potential income. A Class A property with 3% vacancy may have higher EGI than a Class B property with 10% vacancy, even if they have similar potential rents. This clarity helps you identify the truly profitable investment.
Example
Suppose you're evaluating a 10-unit apartment building with $2,000/month rent per unit. Potential Gross Income is $240,000 annually. However, market analysis shows 6% vacancy rate and 2% credit loss. You'd calculate: $240,000 - (6% × $240,000) - (2% × $240,000) = $240,000 - $14,400 - $4,800 = $220,800 EGI. This $19,200 reduction changes your cap rate calculation and may affect your investment decision.
Key Takeaways
- EGI accounts for realistic vacancy and credit losses, unlike theoretical potential gross income
- Always use EGI when underwriting deals—it's the only honest number for property valuation
- Conservative vacancy assumptions protect you; use market data or historical performance to set realistic rates
- EGI feeds directly into Net Operating Income (NOI) calculations, which determine property value and cap rate