Self-storage economic occupancy and loan sizing

A self-storage property can have high physical occupancy and weaker revenue than its occupied-unit count suggests. Promotional rent, older tenants paying different rates, delinquency and unit-size mix can all change the dollars available for debt service. The underwriting task is to reconcile the operating measures, not select whichever percentage looks strongest.

Physical occupancy itself needs a denominator. Occupied units divided by available units treats a 25-square-foot locker like a 300-square-foot unit. Occupied rentable area divided by available rentable area answers a different question. Neither calculation proves how much cash was collected during the period.

Define the revenue measure before using it

Public Storage’s 2025 Form 10-K operating footnotes distinguish realized rent from contract rent: its realized measure reflects promotional discounts, while its contract measure excludes discounts and uncollectible write-offs. Its measures also specify treatment of late and administrative fees. Those are the issuer’s definitions, not an automatic standard for a privately owned facility.

For this worked example, economic occupancy means collected base rent divided by the modeled gross potential base rent for the same period. Other operators may use a different definition. Label the numerator, denominator and measurement period whenever you present the figure. An “economic occupancy” percentage without those components is not ready for lender comparison.

Worked exhibit: 90% occupied does not mean 90% collected

Assume a hypothetical facility with 1,000 equal-size rentable units. This simplifying assumption removes the unit-size issue so the revenue leakage is visible. The model uses a constant $100 monthly potential base rent per unit over a full year, producing $1.2 million of potential annual base rent.

Average occupied units are 900. Contract rent on those units equals $1.08 million before concessions and collection losses. Actual facilities require monthly rent-cohort detail rather than this constant-rate shortcut.

Physical unit occupancy is 90%. The defined economic occupancy is $999,000 ÷ $1.2 million, or 83.25%. The gap is not an additional vacancy deduction: concessions and bad debt have already reduced collected rent. Deducting the same 6.75 percentage points again would understate the cash flow.

The $30,000 ancillary amount is explicitly net of associated direct costs. If your statement supplies gross insurance-related revenue, merchandise sales or other fees, identify corresponding costs before adding the amount. Avoid treating a one-time administrative receipt as recurring rental performance.

Carry the reconciliation into loan sizing

Assume a $9 million value, 65% maximum LTV, 1.25× minimum DSCR, 7% interest, 25-year monthly amortization and a 10% minimum debt yield. These are illustration inputs, not current Jaken Finance Group or industry program terms. The standard monthly payment formula produces an annual debt constant of approximately 8.48135%.

Coverage binds at approximately $5.744 million. Someone who ignores concessions and losses would use $690,000 of cash flow. Their debt-yield ceiling would be $810,000 too high, although the value ceiling would limit the resulting maximum in this particular model. The OCC’s DSCR and debt-yield discussion explains the measures; the selected inputs and resulting decision here are original hypothetical analysis.

Build the evidence package at the right resolution

Ask for monthly occupancy by units and area, the rate charged to each cohort, move-ins and move-outs, promotional credits, delinquency aging, write-offs and actual collections. Reconcile the management software to the operating statement and bank deposits, noting timing and non-rental items rather than forcing a false match.

Separate same-facility performance from expansion. Newly available rentable area changes the denominator; leased expansion space may still be in a promotion period. A rise in occupied square feet is not necessarily an increase in rent per available square foot. Likewise, taking damaged units offline can improve a reported occupancy percentage while reducing total earning capacity.

When a seller proposes rent increases, request the actual notices, effective dates, affected units and observed move-out response where available. Model proposed increases separately from collected rent. A forecast may be reasonable and still require a different financing structure from a fully stabilized income stream.

Ask how the lender handles the remaining differences

The lender may use a different historical period, reserve treatment, management fee or stabilized rent judgment. Present a row-by-row adjustment schedule so disagreements remain visible. A lender accepting trailing collections and a lender accepting projected stabilization are not necessarily quoting against the same business plan.

Discuss what evidence must arrive before proceeds can increase: a period of collections, completed expansion, accepted valuation or another specified condition. A conditional future advance is different from cash funded at acquisition. Keep that distinction in the sources-and-uses schedule.

Before choosing the loan, test a softer move-in rate and slower occupancy recovery independently. The property may withstand either change alone and struggle when both occur. The useful question is how much documented collected income supports the requested debt, and how much sponsor cash remains if that income develops later than planned.