Reading a Multifamily Rent Roll: Loss-to-Lease, Concentration Risk, and the 5 Numbers Lenders Verify
Loss-to-lease, concentration risk, lease-rollover risk, and the 5 numbers lenders verify.
Loss-to-Lease: Upside, Not Income
Loss-to-lease is the gap between in-place rent and market rent. On a 24-unit property where in-place average is $1,400 and broker-quoted market is $1,650, loss-to-lease is $250/unit/month — $72K annually. That number is not income today, but every OM presents it next to in-place income as if it were, and unprepared buyers underwrite to it.
Lenders treat loss-to-lease as upside, not base case. They underwrite to current in-place rent or, in a heavily-discounted scenario, to in-place rent plus a portion of loss-to-lease that can be captured within 12 months at scheduled lease rollover. The rest is investor return, not lender-recognized income.
A defensible analysis verifies the market rent claim with at least three sources: comparable rent surveys, online listing data (CoStar, Apartments.com, Rent.com), and the operator's leasing data over the last 6 months. Operators who haven't actually leased a unit at "market" recently are quoting a rent that doesn't exist.
Concentration Risk: Tenant, Lease Rollover, and Floorplan
Three concentrations matter on multifamily rent rolls. First, lease rollover concentration: what percentage of leases roll within the next 90 days? Within 12 months? A property where 60% of leases roll in the next quarter is a tenancy-renewal bet. Lenders flag rollover above 35% in any 90-day window and price for the risk.
Second, top-tenant concentration on small properties (under 20 units) — does any single tenant represent more than 8–10% of revenue? On a 12-unit, three vacancies would be 25% of revenue. Lenders apply a concentration adjustment to the underwritten NOI on small properties to reflect the probability of vacancy clusters.
Third, floorplan concentration: a building with 80% of units in a single floorplan is exposed to demand shifts in that floorplan. The standard test is whether market rents for that plan are stable, increasing, or compressing. Compressing market rents on a single-plan-heavy building is a slow-motion problem that doesn't show up in trailing-12 numbers.
Non-Revenue Units and Concession History
Most rent rolls present occupancy as physical occupancy: occupied units divided by total units. Lenders use economic occupancy: revenue divided by maximum potential revenue. The two diverge whenever there are non-revenue units — model units, employee-occupied units, units down for renovation, and free-rent concession periods.
A rent roll that shows 95% physical occupancy can have 88% economic occupancy if 5% of units are employee-occupied (zero rent) and 2% are in free-rent concession. The lender uses the 88%; the operator presents the 95%. Concession history is the other reveal: an operator who has given the first month free on every new lease for the past six months has been signaling weak demand.
Pull the lease ledger and reconcile concessions against the rent roll, unit by unit. The pattern of concessions tells you whether the property is actually achieving the rents on the rent roll or just announcing them.
The Five Numbers Lenders Verify
Every multifamily lender independently verifies five numbers from the rent roll. First, in-place rent per unit type — they re-aggregate the rent roll and compare to the operator's summary. Second, occupancy stated as both physical and economic. Third, lease-rollover schedule by 90-day buckets out 12 months. Fourth, concession history over the trailing 6 months. Fifth, the total rent roll income reconciled to the trailing-12 P&L.
Discrepancies of more than 3% on any of these five typically trigger a re-underwrite. Discrepancies of more than 8% can re-trade the deal: if the operator was presenting numbers materially better than reality, the lender (and increasingly, the buyer) will discount accordingly.
Doing this verification yourself before submission — at LOI stage if possible, certainly before earnest money — gives you negotiating leverage and avoids surprises. The numbers are what they are; the only question is who finds them first.
Verify Your Rent Roll Like a Lender Will →
Upload the rent roll and we reconcile it against the trailing-12 P&L. Loss-to-lease, lease-rollover concentration, non-revenue units, concession history — every flag a lender catches, surfaced before submission.
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