Lease Arbitrage
Definition
Lease arbitrage is the coliving operating model where the operator rents a whole building long-term, operates it room by room, and keeps the spread between per-bed revenue and the head lease. It needs little capital to start but carries fixed lease obligations whether rooms fill or not.
The formula
Monthly spread = (Beds × Achieved rate × Occupancy) − Head rent − Operating costs
- Head rent
- what you pay the owner, payable whether or not the beds are let
- Operating costs
- utilities, wifi, cleaning, management, consumables, furniture amortisation
Worked example
A six-bed house on a head rent of £2,600 a month, re-let at £720 a room, operating costs £950.
- 01At 100% occupancy: (6 × £720) − £2,600 − £950 = £770 a month.
- 02At 83% occupancy — one empty room: (5 × £720) − £2,600 − £950 = £50 a month.
- 03At 67% occupancy — two empty rooms: (4 × £720) − £2,600 − £950 = −£670 a month.
One empty room removes 94% of the spread. Two empty rooms turn the house loss-making. This is the whole risk profile of the model in three lines.
Lease arbitrage — renting a whole property and re-letting it by the room — is the most common way operators enter coliving, because it needs no acquisition capital. What it does need is an honest view of the downside, because the fixed head rent transfers all the occupancy risk to the operator.
The regulatory position also moved. Part 5 of the English Devolution and Community Empowerment Act 2026 restricts upwards-only rent review provisions in business tenancies, with retrospective reach on certain arrangements — a change that directly affects the standard master lease risk operators carried. Any lease being negotiated now should be reviewed against those provisions.
Our own view, from operating both models: arbitrage is a good way to learn the operating business and a poor way to build a durable one. The spread is thin by construction, you own no asset at the end, and a single soft quarter can consume a year of margin. Where it works is as a route to proving demand in a market before committing capital to it.
The common mistake
Modelling the spread at full occupancy
The head rent is fixed and the room income is not, which means the entire volatility of the business lands on a thin margin. A model built at 100% occupancy is not optimistic, it is structurally wrong — the number that matters is the spread at your break-even occupancy and the number of empty rooms the house can absorb before it costs you money.
Frequently asked
Is coliving lease arbitrage profitable?+
It can be, and it is thin by construction. In the worked example above a single empty room removes almost the entire monthly spread. The model works where occupancy is reliably high and the head rent is genuinely below market for the whole property; it fails quickly where either assumption slips.
Do I need the owner's permission to sublet by the room?+
Yes, explicitly and in writing, and the lease needs to permit the use as well as the subletting. Operating a room-by-room let under a lease that does not permit it puts the whole business on a foundation the freeholder can remove.
Master lease negotiation for coliving
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Break-even occupancy calculator
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