Real Estate
Self-Storage Unit Profitability Calculator
Estimate effective gross income, net operating income, cash flow after financing and capital reserve, annualized cap rate, and cash break-even occupancy for a self-storage property.
Physical occupancy-
Gross scheduled rent at current occupancy-
Collected rent after delinquency-
Ancillary income-
Effective gross income-
Management fee-
Occupied-unit variable cost-
Monthly net operating income-
Monthly cash flow after debt and reserve-
Annualized capitalization rate-
Cash break-even occupancy-
Decision view
Unit occupancy map and NOI-to-cash-flow waterfall
Unit occupancy map and NOI-to-cash-flow waterfallOccupied, delinquency-exposed, and vacant units are shown beside the exact operating and financing deductions.
Exact scenario comparisonOccupied units changes while all other entered assumptions remain constant.
| Occupied units | Physical occupancy | Gross scheduled rent at current occupancy | Collected rent after delinquency | Ancillary income | Effective gross income | Management fee | Occupied-unit variable cost | Monthly net operating income | Monthly cash flow after debt and reserve | Annualized capitalization rate | Cash break-even occupancy |
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How to use Self-Storage Unit Profitability Calculator
- Enter total and occupied units using the same month-end or average-period basis.
- Enter achieved rent, ancillary income, delinquency, management, variable cost, and property operating expenses.
- Add debt service and capital reserve for cash flow, and enter property value only for the cap-rate view.
Calculator guide
Understanding Self-Storage Unit Profitability Calculator
Self-storage profitability has three different occupancy views: units physically rented, rent actually collected, and the occupancy needed to cover operating costs, debt, and reserves. This calculator keeps those layers separate.
Detailed calculation process
Detailed storage occupancy, NOI, and cash-flow calculation
The default property has 120 rentable units, 104 occupied units, and $138 average monthly rent.
General formula: O=U_o/UR_c=U_o r(1-d)EGI=R_c+U_o aNOI=EGI(1-m)-U_o v-FCF=NOI-D-CO_BE=(F+D+C)/{U[(r(1-d)+a)(1-m)-v]} Collected rent and ancillary income create effective gross income. Management, occupied-unit cost, and fixed property expense produce NOI; debt and reserve then produce investor cash flow.
What each symbol means
Worked substitution with the default inputs
The default property is 14.28 occupancy points above its modeled 72.39% cash break-even level.
Worked situations
Practical examples
- The default 104 occupied units out of 120 equal 86.67% physical occupancy.
- Collected rent and ancillary income produce $14,929.20 of effective gross income and $7,309.45 of monthly NOI.
Better inputs
Useful tips
- Use achieved rent after discounts rather than asking rent.
- Keep debt service out of NOI so the property can be compared independent of financing.
- Track economic occupancy separately when concessions or delinquency are material.
Before relying on the result
Limitations and common mistakes
- One blended rent and ancillary-income amount is used across unit sizes.
- Taxes, insurance, payroll, utilities, marketing, repairs, and software must all be included in the property-expense input.
- Cap rate is annualized from one modeled month and does not replace trailing-twelve-month analysis.
Reference
Key terms
- Physical occupancy
- Occupied units divided by rentable units.
- Effective gross income
- Collected rent plus ancillary income after modeled rent loss.
- NOI
- Property income after operating expenses but before debt service and capital expenditure reserve.
Important note
Use consistent monthly averages and reconcile the result to the rent roll, delinquency report, and property general ledger.
Frequently asked questions
Should vacant-unit utilities be included?
Include property-level utilities in monthly property expenses; use unit-variable cost only for costs caused by an occupied unit.
Why can cap rate be positive while cash flow is weak?
Cap rate uses NOI before debt, while cash flow includes debt service and the reserve.
Can occupied units exceed total units?
No. Keep occupied units at or below rentable units; subdivided or combined spaces should be normalized first.