Gross Potential Rent And The Deductions Beneath It

Every rental income projection starts from gross potential rent, the sum of market rent for every unit as though all were leased and paying. No property ever collects it, and the distance between that figure and real revenue is the substance of the analysis.

What the top line assumes

Gross potential rent assumes full occupancy, market pricing on every unit, and payment in full and on time. Each of those assumptions fails in ordinary operation, not only in bad conditions.

It is a useful number precisely because it is standardized. Two buildings with different lease dates can be compared at the top line before their individual histories complicate the picture.

The risk is treating it as a forecast. It is a reference point, and the deductions applied to it carry all of the judgment in the model.

Vacancy and credit loss are separate lines

Vacancy loss captures rent lost while a unit sits empty between tenancies or during a lease-up. It follows from turnover frequency and how long a unit takes to re-lease.

Credit loss is different. It is rent that was billed to an occupied unit and never collected, whether through nonpayment, an early departure or a balance written off after a tenancy ends.

Combining them into one figure hides which one is moving. A property can be nearly full and still lose meaningful revenue to uncollected balances.

Concessions and loss to lease sit above collections

A concession is rent given away to sign a lease, whether as free weeks or a reduced rate. It reduces revenue without reducing the stated rent on the lease.

Loss to lease is the gap between what in-place tenants pay and what the same units would command today. It appears when rents have moved and leases have not yet caught up.

Both are deductions from the top line rather than expenses, which matters because they change the revenue base every expense ratio is measured against.

Other income belongs after the deductions

Fees, parking, laundry and similar charges are added after rental revenue has been reduced, not blended into the rent line. They carry their own collection risk.

Some of this income is contractual and some is behavioral, depending on whether tenants choose to use the service. The two behave differently when occupancy falls.

Treating ancillary income as though it were rent also distorts valuation, because buyers and lenders often discount income streams that depend on tenant choices.

Where the number should come from

The deductions ought to be drawn from the property's own history and from comparable buildings, not from a habitual figure applied to everything an investor looks at.

An accountant or a property manager with local operating records will describe how these lines have actually behaved. Practices and lease terms also vary by state, so verify local rules rather than assuming.