Co-tenancy: the clause that can switch fixed rent off
In short
A co-tenancy clause makes rent conditional on other tenants. If a named anchor closes, or occupancy falls below a stated level, the obligation changes — usually to alternative rent, sometimes to a termination right once a cure period expires. It cannot be stored as a number: the lease gives you a rule with states, a trigger test and a clock.
Key takeaways
- Opening and ongoing co-tenancy are different clauses with the same name and different remedies.
- Trigger tests come in 3 shapes: a named anchor, an occupancy threshold, and continuous operation.
- The remedy is a sequence with a clock, so the abstract needs states and dates, not a rent figure.
- Occupancy is measured on a stated basis — floor area or unit count — and the basis changes the answer.
A co-tenancy clause ties one tenant's rent to other tenants continuing to trade. It is a retail provision with straightforward logic: a unit in a shopping centre was priced on the footfall its anchors bring, so if the anchors go, rent that assumed them should not survive unchanged.
For anyone building a lease record it is the clause that breaks the model. Most abstracted fields are values. This one is a condition, a remedy and a clock, and any of the 3 stored without the others is wrong in a specific month.
Two clauses that share a name
- Opening co-tenancy. Tests the position at the start: the tenant need not open, or need not pay full rent, unless stated other tenants are trading on the day it would otherwise commence. It interacts with rent commencement, one more reason 3 start dates cannot be one field.
- Ongoing co-tenancy. Tests the position throughout the term on a stated cadence, and can be triggered in year 7 of a 10-year lease by an anchor closing.
- Both may appear in one lease with different thresholds and different remedies — exactly the case a single co-tenancy field cannot represent.
What has to fail before anything switches
- A named anchor requirement. One or more specific businesses must be open and trading. The strongest version names them; a weaker one accepts a replacement of comparable size and quality, which is a judgement rather than a test.
- An occupancy threshold. A stated percentage of the centre must be open, commonly measured by leasable floor area, sometimes by number of units. The 2 bases give different answers in the same centre on the same day.
- A continuous operation requirement. The named tenants must be trading, not merely holding a lease. A dark anchor that keeps paying rent fails a trading test while passing an occupancy test measured on leased area.
The measurement basis is the detail most often lost in abstraction: 70% of leasable area and 70% of units are different tests. Occupancy percentage also appears in operating-expense clauses for an entirely different purpose, and confusing the two is a real failure — see grossing up operating expenses.
The rent line as a small state machine
| State | Entered when | What is owed | Leaves when |
|---|---|---|---|
| Compliant | Anchor trading and occupancy at or above the threshold on a measurement date | Base rent as scheduled | The trigger test fails on a measurement date |
| Failure, in cure | The test fails and the landlord's cure period starts | Base rent, unless the lease abates from the failure date | Cure completed, or the cure period runs out |
| Alternative rent | The cure period expires with no qualifying replacement | Alternative rent as the lease defines it, commonly a percentage of sales in place of base rent | Co-tenancy is restored, or the termination window opens |
| Termination right open | Alternative rent has run for the stated period | Alternative rent, until the tenant elects | The tenant serves notice, or the election window lapses |
Three entries in that table are dates rather than conditions: the measurement date, the end of the cure period, and the end of the election window. Each is a deadline someone can miss, which puts them alongside every other date the portfolio watches, per what counts as a critical date.
The last row is the sharpest. A termination right exercisable only inside a stated window lapses if nobody serves notice, and the tenant then holds a lease it could have walked away from.
Every other rent field answers how much. This one answers under what conditions, and a record with room only for how much answers the wrong question.
What this asks of extraction and review
Extraction has to produce a rule, and a rule cannot be validated the way a date can. A reviewer checking a commencement date compares one value against one clause. A reviewer checking co-tenancy has to confirm a test, a remedy and 3 durations, any of which may sit elsewhere in the lease or be varied by an amendment.
That changes what a confidence number means here. Field-level confidence is designed for values, and a rule assembled from 4 passages has no single score — the limits in what a confidence score on an extracted field means. This clause belongs in the always-reviewed band whatever the model reports.
It also affects resourcing. Clauses producing rules rather than values are where an outsourced desk and an in-house pipeline diverge most, the substance of an outsourced abstraction desk or your own pipeline. And where alternative rent is a percentage of sales, the record needs the sales definitions behind natural and artificial breakpoints, or it cannot be calculated at all.
Modelling states, deadlines and the alerts hanging off them is ordinary operational software — the work described under internal tools and ops. Siblings sit in lease abstraction and document AI, inside our work with real estate teams.
Frequently asked questions
Short answers to the follow-ups this page tends to raise.
What is a co-tenancy clause in a retail lease?
It is a clause making a tenant's obligations conditional on other tenants trading in the same centre. If a named anchor closes or occupancy falls below a stated threshold, the tenant may pay a reduced or alternative rent, and in some leases may eventually terminate. It protects a tenant that agreed its rent on the assumption of a particular tenant mix.
What is the difference between opening and ongoing co-tenancy?
Opening co-tenancy tests the condition once, at the point the tenant would otherwise open and start paying; ongoing co-tenancy tests it repeatedly through the term. A lease can contain both, with different thresholds and different remedies, so an abstract that stores a single co-tenancy field will lose one of them.
What remedy does a tenant get when co-tenancy fails?
Whatever the lease specifies, and almost always as a sequence rather than one remedy. A cure period runs first, stated in days or months. Alternative rent follows — often a percentage of sales in place of base rent. If the failure persists for the stated period, a right to terminate arises, exercisable only inside a defined window.
- co-tenancy
- retail leases
- conditional rent
- lease abstraction
The work behind this page
Builds from our portfolio that this page draws on.
AI Lease Management
AI-powered commercial real estate lease management for multi-brand operators — automates lease data extraction, obligation tracking, and portfolio intelligence.
Real EstateRentIQ
An AI rent & revenue-management platform that recommends the optimal rent for every multifamily unit from demand, comps, seasonality and exposure — and guides each renewal offer.
Real EstateRead next
- Lease abstract: the summary someone acts on without opening the leaseAn abstract is not a shorter lease. It is the record an operations team runs a portfolio from, and the test it has to pass is whether the week's decisions can be made from it alone.definition
- Execution, delivery, rent commencement: 3 start dates, not one fieldExecution binds the parties, delivery usually starts the term, rent commencement starts the money. Collapse them into a single start date and at least one downstream clock is wrong.definition
- Natural and artificial breakpoints: when sales become rentThe breakpoint is the line between sales reporting as a chore and sales reporting as a rent input. The exclusion list behind it can change the rent owed several-fold on identical trading.definition
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