The gap between market rent and the rent actually in place, expressed as a line item on the operating statement. It is an estimate of upside, not a loss, and the size of the estimate depends entirely on who set the market rent.
The longer version
Gross potential rent is the rent a property would collect if every unit paid market. Loss to lease is the deduction that brings that number down to what in-place leases actually pay. It sits above vacancy and concessions on a multifamily operating statement, and it is the first number an underwriter reprices, because it is the one furthest from a contract.
The reason it exists is that leases are fixed and markets move. A unit leased eighteen months ago at the rent of the day sits below today's asking rent, and the difference only closes when the lease rolls. In a rising market loss to lease widens across the rent roll and represents genuine embedded upside. In a falling market it inverts, and the same line becomes gain to lease, which sponsors mention less often.
The judgment is in the market rent, and that is where underwriting disagreements live. The sponsor's market rent usually comes from a comparable set and from recent leases signed at the property. A lender tests it against the trailing leasing activity rather than the pro forma: what did the last twenty leases actually sign at, including concessions, and how long did units sit. A loss to lease built on asking rents nobody paid is an assumption wearing the clothes of an observation.
Timing is the second test. Upside that depends on leases rolling is only reachable at the pace they roll, so the lease expiration schedule matters as much as the gap. A twelve percent loss to lease on a rent roll where most leases expire in two months is a different proposition from the same gap on leases with nine months to run, and both are different again where rent regulation or a long-dated master lease caps what can be done.
In diligence the line is tested against the rent roll, the trailing twelve months of collections, the lease expiration schedule, and the concession history. Where the gap drives the credit decision, the underwriting usually haircuts it rather than taking it at face value.
Common questions
- What does loss to lease mean?
- The difference between market rent and the in-place rent actually being paid, shown as a deduction from gross potential rent. It measures how far below market the existing leases sit.
- Is loss to lease good or bad?
- Neither on its own. A large gap is embedded upside if market rents are real and leases roll soon enough to capture it. The same number is an aggressive assumption if the market rent came from asking prices rather than signed leases.
- How is loss to lease calculated?
- Market rent minus in-place rent, summed across the rent roll for the period. It is usually shown both in dollars and as a percentage of gross potential rent, and it sits above vacancy, concessions and bad debt on the operating statement.
- What is gain to lease?
- The same line with the sign reversed, when in-place rents sit above current market. It appears in softening markets and signals that renewals are likely to reprice downward.
- How do lenders test loss to lease?
- Against signed leases rather than asking rents. The usual checks are the trailing leasing activity net of concessions, the lease expiration schedule that determines when the gap can be captured, and any regulatory or structural limits on raising rents.