If occupancy is above 88 percent and your operating expense ratio is below 50 percent, the facility is performing. If either number is outside that range, you have a specific problem to fix.
What do you need before you start the profitability check?
Pull these before you sit down:
- Twelve months of rent roll data, unit by unit, showing occupied and vacant units each month.
- A complete expense ledger: payroll, utilities, insurance, property taxes, maintenance, marketing, and any management fees.
- Your gross potential revenue, which is the rent you would collect if every unit were full at current street rates.
- Your actual collected revenue for the same period.
- Your current debt service number, meaning your monthly principal and interest payment, kept separate from operating expenses.
Debt service does not go into the NOI calculation. NOI is gross revenue minus operating expenses only. Keeping debt service separate lets you compare your facility to others regardless of how each one is financed.
How do you run the profitability check, step by step?
- Calculate gross potential revenue. Multiply each unit type by its current street rate and add them up for a full month.
- Calculate economic occupancy. Divide actual collected revenue by gross potential revenue. A gap of more than five percentage points between physical and economic occupancy usually means delinquency, unpaid balances, or discounts that have not been reviewed.
- Calculate NOI. Subtract total operating expenses from gross revenue. Do not subtract debt service here.
What does the profitability checklist look like?
- Physical occupancy at or above 80 percent (break-even threshold per Self Storage Association SSA Public Library)
- Physical occupancy at or above 88 percent (stabilized performance target per Self Storage Association SSA Public Library)
- Economic occupancy within five percentage points of physical occupancy
- OER at or below 50 percent of gross revenue
- NOI margin between 40 and 60 percent
- Annual rent increases applied, targeting 3 to 5 percent per the Self Storage Association SSA Public Library
- Climate-controlled units priced at a 25 to 40 percent premium over standard drive-up units, per RecNation Storage
- Revenue per net rentable square foot tracked annually (standard units typically run $10 to $18, per RecNation Storage)
- Delinquency rate reviewed monthly and lien process started on schedule
- Trailing-12-month figures used for every calculation, not a single month
Hypothetical example: what does the math look like on a real-sized facility?
Hypothetical example.
Moving from 70 to 90 percent occupancy adds 25 to 30 percent to NOI with no capital expenditure, according to RecNation Storage, so the occupancy gap is the first place to attack.
What are the common mistakes that cost money?
The biggest mistake is confusing cash flow with profitability.
A second mistake is using a single month instead of trailing 12 months. One slow January or one busy August distorts every ratio. Always use the full year.
A third mistake is ignoring the gap between physical and economic occupancy. Check both numbers every month.
New facilities need patience. Most reach stabilized occupancy within 18 to 36 months of opening, according to the Self Storage Association SSA Public Library. Running a profitability check at month six and concluding the facility is failing is a mistake.
Finally, operators often skip the revenue-per-square-foot calculation. Standard units typically produce $10 to $18 per net rentable square foot annually, per RecNation Storage. If you are below $10, your street rates are likely behind the market. Climate-controlled units command a 25 to 40 percent premium over standard drive-up units and in most markets that premium outpaces the additional operating costs, per RecNation Storage, so under-pricing them is a direct margin leak.
What should you measure, and how do you collect it?
Physical occupancy: occupied units divided by total units. Pull from your rent roll at the same point each month, ideally the first of the month before any new move-ins.
Economic occupancy: collected revenue divided by gross potential revenue. Pull from your payment records and your rate sheet.
OER: total operating expenses divided by gross revenue. Pull from your expense ledger and bank deposits, trailing 12 months.
NOI margin: NOI divided by gross revenue. Calculated from the two numbers above.
Revenue per net rentable square foot: annual collected revenue divided by total net rentable square footage. Your rent roll has the unit sizes; add them up once and update the denominator only when you add or reconfigure units.
According to IRS Statistics of Income corporate return data for 2022, cited by VantaInsights, the self-storage net profit margin averages 36.2 percent across the sector, among the highest of any real estate-adjacent operating business. Individual facility performance varies based on location, occupancy, and operational model, so your own trailing-12-month numbers are always more useful than a sector average.
What should you do next?
- Pull your rent roll and expense ledger for the last 12 months.
- Calculate physical occupancy, economic occupancy, OER, NOI, and NOI margin using the formulas above.
- Compare each number to the benchmarks in the checklist.
- Identify the single largest gap, whether that is occupancy, a specific expense line, or a pricing gap on climate-controlled units.
- Repeat the full check every quarter using trailing-12-month figures.