A sublease is only as good as the master lease under it. Upload both and get the sublandlord and subtenant, the subleased premises and rent, the term, the consent and recapture rights, the profit-sharing split, and any non-disturbance protection pulled into structured fields, each citing the page it came from.
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A sublease sits on top of a master lease and inherits its risks. A subtenant reading only the sublease can miss the term that ends its occupancy the day the master lease terminates. Each row below names the provision, says what it controls, and states the consequence when it is not captured and reconciled against the master lease.
| Sublease provision | What it controls | What it costs when it is missed |
|---|---|---|
| Master lease dependence and term | That the sublease cannot outlast the master lease, and that a default or termination under the master lease can extinguish the sublease | A subtenant invests in build-out on a five year sublease, then loses the space when the sublandlord defaults on the master lease two years in |
| Landlord consent to the sublease | Whether the master lease requires the landlord's consent, on what standard, and whether that consent was actually obtained and documented | A sublease entered without required consent is a default under the master lease, putting both the sublandlord and the unwitting subtenant at risk |
| Recapture right | The landlord's right, triggered by a sublease request, to take back the space itself instead of allowing the sublease | A sublandlord counts on sublease income to offset dark space, then the landlord recaptures and the deal the subtenant negotiated evaporates |
| Profit-sharing split | Whether the master lease requires the sublandlord to share sublease profit, rent above the master rent, with the landlord, and at what percentage | A sublandlord models the full spread as its own, then owes the landlord half of it, turning a projected gain into a wash |
| Sublease versus assignment character | Whether the document is a true sublease, where the sublandlord keeps a reversion, or an assignment that transfers the whole interest despite its label | A document labeled a sublease that operates as an assignment triggers different consent standards and can strip the sublandlord's intended reversion |
| Non-disturbance and recognition | Whether the subtenant has any agreement from the landlord to recognize the sublease and not disturb it if the master lease ends | Without a recognition agreement the subtenant has no direct rights against the landlord, so a master lease termination ends the subtenant's occupancy with no recourse |
A sublease read in isolation misses the risks that live in the master lease above it. These are the terms that decide what the subtenant actually holds.
The sublandlord and subtenant, the subleased premises within the master premises, and whether the sublease covers all or part of the space, tied to the master lease it sits under.
The master lease the sublease depends on, its term and expiration, and the fact that the sublease cannot outlast it and can be extinguished by a master lease default or termination.
Whether the master lease requires landlord consent to the sublease, on what standard, whether it was obtained, and whether the landlord holds a recapture right triggered by the sublease request.
Whether the sublandlord must share sublease profit, rent collected above the master rent, with the landlord, and at what percentage, so the real economics of the sublease are captured.
Whether the document is a true sublease with a retained reversion or an assignment in substance, because the two carry different consent standards and different consequences.
Whether the subtenant has any recognition or non-disturbance agreement from the landlord, which is the only thing that protects the subtenant if the master lease ends.
From a sublease and the master lease under it to one reconciled record of what the subtenant holds and on what conditions.
A sublease abstracted without its master lease is incomplete, because the master lease sets the term the sublease cannot exceed, the consent standard, and the recapture and profit-sharing rights. Include any consent letter and recognition agreement. Scans are fine.
The model returns the parties, premises, rent, and term of the sublease, then reads the master lease for the consent standard, recapture right, profit-sharing split, and any assignment or subletting restriction, and reconciles the two.
Each field links to the page it came from. The output flags a sublease that outlasts its master lease, a missing consent, a recapture right that was never cleared, a profit share the sublandlord did not account for, and the absence of a recognition agreement.
Push the reconciled sublease data to Excel, CSV, JSON, or the API, so the sublease income and its conditions land on the rent roll and the consent and recapture posture is on the diligence record.
Last updated July 2026. What sublease abstraction is, how a sublease differs from an assignment, what recapture and profit-sharing do, and why a sublease can never be read apart from the master lease under it.
Sublease abstraction is the extraction and reconciliation of a sublease against the master lease it depends on. It pulls out the sublandlord and subtenant, the subleased premises and rent, the term, and the consent, recapture, profit-sharing, and non-disturbance terms, then checks them against the master lease that governs whether the sublease is even permitted. A sublease read on its own is only half the picture, because the risks that matter most to a subtenant live in the master lease above it.
The reason it needs its own treatment is dependence. A sublease cannot outlast its master lease and can be extinguished if the master lease is terminated, so the master lease term, default, and termination provisions are part of the sublease risk whether the subtenant read them or not. The related lifecycle explainer is the blog on commercial lease assignment versus subletting, and the full field list is on the commercial lease abstract template.
In a sublease, the original tenant, now the sublandlord, transfers part or all of the space to a subtenant but keeps a reversion and stays fully liable to the landlord under the master lease. In an assignment, the original tenant transfers its entire interest to the assignee and, depending on the release language, may step out entirely. A sublease creates a new layer; an assignment substitutes a party. The two trigger different consent standards, which is why a document labeled a sublease that actually operates as an assignment is a problem worth flagging.
A recapture clause gives the landlord the right, when a tenant asks to sublease or assign, to take the space back instead of allowing the transfer. The landlord recaptures the premises, the tenant is released from that space, and the proposed subtenant's deal disappears. Recapture matters to a sublandlord counting on sublease income to offset space it no longer needs, because the landlord can simply take the space and capture any upside itself.
Profit sharing is a master lease requirement that the tenant split any sublease profit, rent collected from the subtenant above the rent owed under the master lease, with the landlord, commonly at 50 percent after the tenant recovers its transaction costs. It means a sublandlord that subleases at a premium does not keep the full spread. Missing this term causes a sublandlord to model income it will actually owe away, which is why it belongs on the abstract.
Almost always. Most commercial master leases prohibit subleasing without the landlord's prior written consent, often on a not-to-be-unreasonably-withheld standard. A sublease entered without required consent is a default under the master lease that can put both the sublandlord and the subtenant at risk. The abstraction has to record whether consent was required and whether it was actually obtained and documented, not just assumed.
Ordinarily the sublease terminates with it. A sublease is carved out of the master lease, so if the master lease ends, whether by the sublandlord's default or otherwise, the subtenant's right to occupy generally ends too, with no direct claim against the landlord. The only reliable protection is a recognition or non-disturbance agreement in which the landlord agrees to recognize the subtenant and let it stay if the master lease falls away. Capturing whether that agreement exists is one of the most important outputs of the abstraction.
Because the sublease inherits the master lease's limits. The term, the consent standard, the recapture right, the profit-sharing split, and the use and alteration restrictions all flow down from the master lease, and a sublease that conflicts with any of them is exposed. For a landlord reviewing a sublease request, for a subtenant doing diligence, and for an asset manager tracking sublet income across a portfolio, the two documents have to be read together. The portfolio workflow is on bulk lease upload, and the general product overview is on lease abstraction software.
Yes, and the reconciliation against the master lease is exactly the step that gets skipped by hand. The model reads each sublease with its master lease, returns the parties, premises, rent, term, consent, recapture, and profit-sharing terms as structured fields, and flags the subleases that outlast their master lease, lack documented consent, or have no recognition agreement. Accuracy depends on scan quality, and every published accuracy figure in this category is self-reported, so test on your own worst-scanned sublease first. For the asset-level view, see lease abstraction for asset managers and the diligence workflow on lease abstraction for paralegals.
The extraction and reconciliation of a sublease against the master lease it depends on. It captures the parties, premises, rent, term, consent, recapture, profit-sharing, and non-disturbance terms, and checks them against the master lease that governs whether the sublease is even permitted.
In a sublease the original tenant keeps a reversion and stays liable to the landlord. In an assignment the tenant transfers its entire interest and may step out. A sublease adds a layer; an assignment substitutes a party. The two trigger different consent standards.
A landlord's right, triggered by a sublease or assignment request, to take the space back instead of allowing the transfer. The landlord recaptures the premises and the proposed subtenant's deal disappears, which matters to a sublandlord counting on sublease income.
A master lease requirement that the tenant split sublease profit, rent above the master rent, with the landlord, commonly around 50 percent after transaction costs. It means a sublandlord subleasing at a premium does not keep the full spread.
Almost always. Most commercial master leases prohibit subleasing without prior written consent, often on a not-to-be-unreasonably-withheld standard. A sublease without required consent is a default that can put both the sublandlord and the subtenant at risk.
Ordinarily the sublease terminates with it, and the subtenant loses occupancy with no direct claim against the landlord. The only reliable protection is a recognition or non-disturbance agreement in which the landlord agrees to let the subtenant stay.
Yes. The model reads each sublease with its master lease, returns the parties, rent, term, consent, recapture, and profit-sharing terms as structured fields, and flags subleases that outlast their master lease, lack documented consent, or have no recognition agreement. Test on your worst-scanned sublease first.
Diligence-grade sublease and consent review.
Learn moreTrack sublet income across the portfolio.
Learn moreThe full field list the sublease sits inside.
Learn moreAbstract every sublease in a portfolio at once.
Learn moreSublease and consent deadlines on the calendar.
Learn moreThe full overview of our AI lease abstraction tool.
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