Effective gross income estimates property revenue after vacancy, concessions, and collection loss; learn the formula, rent-roll inputs, and underwriting uses.
Effective gross income (EGI) is the operating revenue an income-producing property is expected to generate after deducting vacancy and expected credit or collection losses from its potential income. It is the revenue line normally used before property operating expenses are subtracted to calculate net operating income.
EGI is more realistic than assuming every unit or space is occupied and every billed amount is collected. It does not, however, prove that the income will be received in cash or that the property will be profitable.
A common formula is:
When potential rent and other property income are presented separately:
Terminology varies. Potential gross income, potential gross revenue, gross potential rent, and potential gross rental income may be used for similar starting points. Some reports include other operating income in potential gross income; others add it separately. The calculation should state which convention it uses.
EGI sits between a property’s maximum or scheduled revenue and its operating profit:
| Stage | What it represents | Typical calculation |
|---|---|---|
| Potential rental income | Rent if the defined units or spaces produced their scheduled or market rent for the full period | Units or area multiplied by accepted rent and time |
| Other operating income | Parking, storage, laundry, reimbursements, amenity, or service income attributable to the property | Supportable recurring income by source |
| Potential gross income | Total property operating income before vacancy and credit loss | Potential rent plus other operating income |
| Effective gross income | Income after vacancy, concessions, and expected credit loss | Potential gross income minus economic income loss |
| Net operating income | Property income after accepted operating expenses | EGI minus operating expenses |
| Property cash flow | Cash remaining after further defined deductions | NOI less reserves, capital costs, debt service, or other stated items |
The order prevents a common error: treating potential rent as if it were collected revenue or treating EGI as if it were profit.
Potential rental income is the amount the property could generate from rent under a stated assumption. That assumption might use:
Those approaches do not answer the same question. In-place scheduled rent is useful for reviewing current operations. Market rent may be relevant to stabilization or appraisal, but it is not yet contracted income. Above-market contract rent may be legally payable today but vulnerable at renewal. A reliable EGI calculation labels its rent basis and measurement date.
For leased property, reconcile potential rent to the rent roll and lease documents. Check:
A rent roll is a summary, not the controlling contract. Material terms should be verified against executed leases, amendments, side letters, and collection records.
Other operating income can include recurring amounts generated through property operations, such as:
An amount belongs in EGI because it is supportable property operating income, not because it appears in an account labeled “other income.” Financing proceeds, owner contributions, refundable deposits not yet earned, property-sale proceeds, and unrelated investment income are not recurring property operations.
Tenant reimbursements require matching treatment. If tax, insurance, utility, or common-area reimbursements are included in EGI, the related owner-paid expenses should also appear in the operating statement. Including the reimbursement while excluding the expense can overstate NOI.
The deduction from potential income should reflect more than visibly empty space.
Physical vacancy measures unoccupied units or space. A 100-unit building with five vacant comparable units has 95% physical occupancy at that date. A point-in-time count does not show how long units were vacant or whether move-outs and move-ins occurred during the period.
Economic vacancy measures lost income relative to the defined potential. It can include:
A property can be physically full but economically below full occupancy. For example, every unit may be leased while several tenants receive free-rent periods or fail to pay.
Property credit loss is the portion of billed or potential income not expected to be collected from tenants. It is not the same as an accounting allowance for credit losses on a lender’s loan portfolio. Evidence can include aging schedules, write-offs, payment histories, tenant financial condition, disputes, and current collections.
Concessions include free rent, reduced introductory rent, moving allowances, or other incentives that reduce the economic rent received. Reporting full contract rent as income and hiding concessions elsewhere can overstate EGI.
Assume a small apartment property has the following annual income capacity and losses:
| Income component | Amount |
|---|---|
| Potential apartment rent | $360,000 |
| Potential parking income | 24,000 |
| Potential laundry income | 6,000 |
| Potential gross income | 390,000 |
| Physical vacancy loss | (18,000) |
| Rent concessions | (6,000) |
| Expected credit loss | (9,000) |
| Effective gross income | 357,000 |
The calculation is:
The total economic income-loss rate is:
This percentage is not the same as the physical vacancy rate. Only $18,000 of the $33,000 loss comes from vacant units; concessions and nonpayment create the rest.
Suppose the same property has $210,000 of accepted annual operating expenses. Its NOI is:
Its operating expense ratio is:
At a purely illustrative 6.50% capitalization rate, direct capitalization would indicate about $2.26 million:
If annual debt service were $120,000, an NOI-based debt-service coverage ratio would be approximately 1.23x.
These results are linked. Overstating EGI by $10,000 also overstates NOI by $10,000 when expenses are unchanged. At a 6.50% cap rate, that error changes indicated value by about $153,846 and increases apparent coverage. The example does not establish a market cap rate, loan standard, or property value; it shows why the revenue bridge requires evidence.
Cash collected during a period can differ from recognized or expected property income because of timing:
For example, the property above might report $357,000 of accrual-basis EGI but collect $350,000 in cash because $7,000 remains in current receivables. Alternatively, cash collections could exceed EGI if tenants pay old balances. Analysts should reconcile billed rent, recognized revenue, collections, receivables, deposits, and write-offs rather than substituting one line for another.
| EGI version | Typical evidence | Appropriate use | Main limitation |
|---|---|---|---|
| Historical EGI | Completed-period operating statements and ledgers | Verifying reported performance | May reflect unusual vacancy, concessions, or collections. |
| Trailing-12-month EGI | Most recent 12 months | Reviewing a recent full-year run rate | Can combine different leases, rents, and occupancy conditions. |
| Budgeted EGI | Management’s future-period budget | Planning and variance analysis | Depends on management assumptions. |
| Run-rate EGI | A recent month or quarter annualized | Rapid current estimate | Can be distorted by seasonality and short-term collection timing. |
| Stabilized EGI | Market-supported normal occupancy, rent, and collection assumptions | Appraisal or analysis through lease-up and disruption | Relies on estimates that may not be achieved. |
| Underwritten EGI | Income accepted under a lender or program methodology | Credit analysis and loan sizing | Definitions and required adjustments differ. |
The OCC’s commercial real estate lending handbook explains that a stabilized underwriting analysis may apply a vacancy factor above or below current vacancy based on expected experience and comparable properties. That means stabilized EGI is not simply today’s annualized collections and not necessarily the owner’s forecast.
Fannie Mae’s multifamily DSCR job aid illustrates a program-specific calculation in which underwritten effective gross income is reduced by underwritten property expenses and required capital expenditures or replacement reserves to produce underwritten net cash flow. The EGI label therefore identifies only one stage of the credit calculation.
A defensible stabilized EGI calculation generally requires these steps:
Stabilization should represent a supportable normal condition, not automatic full occupancy. Some vacancy and collection loss usually remains even in a well-performing market because leases expire, units turn over, and collections are imperfect.
The EGI structure must reflect how the property earns revenue.
Review unit rent, concessions, bad debt, employee or model units, parking, laundry, pet income, utility reimbursements, turnover, and units offline for renovation.
Review base rent, percentage rent, expense reimbursements, free rent, lease expiration, tenant options, co-tenancy provisions, downtime, and tenant credit. A physically occupied building can suffer material economic vacancy through concessions or nonpayment.
Review contractual rent, reimbursements, tenant concentration, lease rollover, downtime, and specialized improvements that may affect reletting.
Room revenue depends on available rooms, occupancy, and average daily rate. Food, beverage, parking, and other departmental revenue may be relevant. A conventional annual rent-roll formula is not sufficient.
Review occupied units, street rates, in-place rates, promotions, delinquency, auction or late fees, insurance-related revenue, and churn. High physical occupancy can coexist with weak economic occupancy if discounts are large.
Lease labels such as net, double net, and triple net do not have fully uniform economic meaning. Read the lease to determine whether taxes, insurance, maintenance, capital repairs, administration, and other costs are paid directly by the tenant or reimbursed to the owner.
These sources illustrate U.S. bank-supervisory and agency-program uses. The controlling calculation for a particular appraisal or loan depends on its current scope, program rules, lender policy, contracts, and supporting records.
This article is for financial education. It does not provide an appraisal, lending decision, accounting or tax conclusion, or individualized real estate investment advice.