Blog · Board and management reporting
Compare operating income, occupancy, and cost across a company's commercial property portfolio. A worked example shows the source rows, formulas, reconciliation, and effect of a higher maintenance bill.
Property asset management KPI examples should connect occupied space with the income it generates and the cost of operating it. Start with occupancy, net operating income, cost per rentable square foot, and net operating income margin. Together they show whether a company's commercial property portfolio is using its space and retaining enough income after operating expenses.
This example concerns business properties operated and leased by a US company. It measures property operations without making a valuation or investment recommendation.
Use a short set of measures with a clear denominator:
| KPI | Formula | What it answers |
|---|---|---|
| Physical occupancy | Occupied rentable square feet / Total rentable square feet | How much rentable space is occupied? |
| Net operating income, or NOI | Property operating income - Property operating expenses | What does the property retain before financing and capital items? |
| Operating cost per rentable square foot | Operating expenses / Total rentable square feet | What does the whole property cost to operate? |
| NOI margin | NOI / Property operating income | How much of the income remains after operating expenses? |
The OCC's commercial real estate lending handbook defines NOI as gross property income less operating expenses. Its definition excludes interest, principal, income taxes, depreciation, and capital items from operating expenses. Here, the same subtraction is applied to one month's actual operating records rather than an annual underwriting estimate.
Do not silently substitute gross building area for rentable area. The EIA's commercial building terminology includes hallways, lobbies, stairways, and other enclosed space in floorspace. Your lease-based rentable area schedule can have a different boundary. Document which area definition each KPI uses.
For machinery and equipment rather than buildings, use physical asset management KPIs. Accounting measures such as depreciation belong in the separate fixed asset management KPI view.
An illustrative US operating company manages three commercial properties. The workbook combines a September 30, 2026, occupied-area snapshot with recognized operating income and expenses for September. It does not assume that month-end occupancy represents every day of the month.
Use property IDs to join the approved rentable-area schedule, lease occupancy register, property ledger, and operating-cost export. Keep invoice dates, accounting periods, expense categories, and reimbursement flags available behind the property totals. Exclude intercompany duplicates when consolidating.
| Property | Rentable area (sq. ft.) | Occupied area (sq. ft.) | Base rent income (USD) | Other operating income (USD) | Operating expenses (USD) |
|---|---|---|---|---|---|
| West | 60,000 | 54,000 | 180,000 | 10,000 | 65,000 |
| Central | 40,000 | 32,000 | 96,000 | 4,000 | 45,000 |
| East | 100,000 | 95,000 | 237,500 | 12,500 | 90,000 |
| Portfolio | 200,000 | 181,000 | 513,500 | 26,500 | 200,000 |
Other operating income is property-related income recognized in the period. Expenses include the company's defined operating categories, such as routine maintenance, property insurance, property taxes, and utilities. Security deposits are excluded from income. Capital improvements are excluded from operating expenses.
Tenant reimbursements need symmetrical treatment. If a reimbursement is included in income, keep the corresponding reimbursed expense in operating expenses. Otherwise the margin changes simply because one property's ledger presents reimbursements differently.
The following table shows every calculation. Percentages are rounded to one decimal place; costs per square foot are rounded to two decimals. Calculations use unrounded values.
| Property | Operating income calculation (USD) | NOI calculation (USD) | Occupancy calculation | Operating cost per sq. ft. (USD) | NOI margin calculation |
|---|---|---|---|---|---|
| West | 180,000 + 10,000 = 190,000 | 190,000 - 65,000 = 125,000 | 54,000 / 60,000 = 90.0% | 65,000 / 60,000 = 1.08 | 125,000 / 190,000 = 65.8% |
| Central | 96,000 + 4,000 = 100,000 | 100,000 - 45,000 = 55,000 | 32,000 / 40,000 = 80.0% | 45,000 / 40,000 = 1.13 | 55,000 / 100,000 = 55.0% |
| East | 237,500 + 12,500 = 250,000 | 250,000 - 90,000 = 160,000 | 95,000 / 100,000 = 95.0% | 90,000 / 100,000 = 0.90 | 160,000 / 250,000 = 64.0% |
| Portfolio | 513,500 + 26,500 = 540,000 | 540,000 - 200,000 = 340,000 | 181,000 / 200,000 = 90.5% | 200,000 / 200,000 = 1.00 | 340,000 / 540,000 = 63.0% |
Central needs the first review. It has the lowest occupancy, the highest operating cost per rentable square foot, and the lowest NOI margin. Those are questions for the property manager, not evidence of a single cause. Review vacant suites, service obligations, lease concessions, and unusual expense invoices before choosing an action.
East contributes the most NOI in dollars, but West has the higher margin. The distinction matters when managers discuss profitability: dollar contribution and percentage retention answer different questions. The broader financial KPI guide explains where operating measures fit alongside company financial results.
The portfolio's $340,000 NOI must equal both the sum of property NOI and total operating income less total operating expenses:
NOI check: 125,000 + 55,000 + 160,000 = 340,000 = 540,000 - 200,000.
The occupied and vacant areas must reconcile to the approved rentable-area schedule. Here, vacant area is 200,000 - 181,000 = 19,000 square feet, and 181,000 + 19,000 = 200,000.
Reconcile the $540,000 income and $200,000 expense totals to the selected ledger accounts for the same month. Check that every occupancy row maps to one property and that no suite appears twice. A percentage can look reasonable even when duplicate suite records inflate both area columns.
Never average the property margins or occupancy percentages to obtain the portfolio result. Divide summed NOI by summed income, and summed occupied area by summed rentable area. This gives each property its appropriate denominator weight. The general KPI examples guide provides other measures with the same need for explicit denominators.
Suppose Central's routine maintenance expense increases by $10,000. Every other source input stays the same. This variation isolates the cost effect; it does not predict what a real maintenance project will do to occupancy or rent.
| Measure | Original calculation, amounts (USD) | Changed calculation, amounts (USD) |
|---|---|---|
| Central operating expenses (USD) | 45,000 | 45,000 + 10,000 = 55,000 |
| Central NOI (USD) | 100,000 - 45,000 = 55,000 | 100,000 - 55,000 = 45,000 |
| Portfolio operating expenses (USD) | 200,000 | 200,000 + 10,000 = 210,000 |
| Portfolio NOI (USD) | 540,000 - 200,000 = 340,000 | 540,000 - 210,000 = 330,000 |
| Portfolio NOI margin | 340,000 / 540,000 = 63.0% | 330,000 / 540,000 = 61.1% |
| Portfolio occupancy | 181,000 / 200,000 = 90.5% | 181,000 / 200,000 = 90.5% |
The margin falls by 10,000 / 540,000 = 1.9 percentage points, rounded. Occupancy does not change. The expense manager owns the cost explanation; the leasing manager still owns the vacant-space explanation.
Bring a sample of your own property ledger, occupied-area schedule, and operating-cost export. Covirage maps the columns, and its tools compute and check the income, cost, and occupancy figures; the external AI model explains the results with every figure traced to its rows. Create a free Covirage account, then set up your business and bring your file.
See customer profitability analysis for the supporting approach to comparing income and the costs associated with it.
Start with physical occupancy, operating income, operating expenses, and net operating income. Add cost per square foot and income margin to compare differently sized properties. These measures describe operating performance; they do not establish a property's market value or determine whether a property should be purchased.
Divide the portfolio's occupied rentable square feet by its total rentable square feet at the same date. Use the totals rather than averaging property percentages. For a monthly average, apply the same daily or other documented averaging method to both the occupied area and total rentable area.
Property net operating income excludes principal and interest payments, income taxes, depreciation, and capital improvements. It subtracts property operating expenses from property operating income. State the treatment of tenant reimbursements and replacement reserves so the measure is comparable across properties and reporting periods.
Yes. Occupied space can carry low rent, concessions, or high servicing costs. Read occupancy with recognized income and operating costs, then examine the leases and expense rows behind the difference. A full building does not by itself demonstrate strong cash collection or a strong operating margin.