WorkflowFinancial Close & Account Reconciliation

Lease Abstraction

Lease abstraction where every number is tied to its clause and every judgement is signed by a person

Leases on the books with every number tied to its clause, and every judgement signed.

See one case, screen by screen ↓
demo46termsabstracted from a lease, its amendment and work letter — 79 pages — each cited to its page
demo120of 120payments confirmed by a second agent that re-read the lease on its own
demo6 min 12 sof agent time, then a 14-minute review — booked 18 days before the lease starts
target1dayto test each amendment as a modification and draft the remeasurement
In short

What is Lease Abstraction?

Lease abstraction is reading a lease and its amendments and pulling out the terms that matter — dates, rent and escalations, free rent, incentives, options and notice dates — into structured data, so the lease can be accounted for under ASC 842 or IFRS 16. Lease Abstraction does it with eight agents that cite every term to its page, build the payment schedule and accounting values, re-read every payment, and bring each judgement to the lease accountant to decide and sign.

How to choose AI solutions for back-office and enterprise work →

Updated

The problem

Why a signed lease takes hours to reach the books, and why errors reach the audit

A lease is 60–90 pages, plus amendments, a work letter and side letters. To account for it under ASC 842 or IFRS 16, someone has to find the commencement date, every rent step and free month, the incentives and the options, apply each amendment in order, build the monthly payment schedule, pick the discount rate and key it all into the lease subledger. A lease accountant does that by hand, lease after lease, on top of the close.

The judgements are the hard part, and the reasons behind them are often lost in a spreadsheet: is the renewal reasonably certain, will the termination right be used, does an amendment add a right of use at a market price? When something is missed, it surfaces as an audit finding: a lease missing from the population because it sat inside a 3PL or colocation contract, the wrong lease term, the wrong rate, or an amendment that was never remeasured.

typical2–6hoursof abstraction per lease by hand, and more for leases in another language
demo1,146leasesin the sample group's portfolio, each to keep right through every amendment, renewal and termination
demo≈ $9.8Mof liability in 4 supplier contracts that look like leases nobody sent, found among 2,318 contracts
Where one lease's hours goestimated
By hand5 days
With the solution0.4 days
  • Gathering the lease, amendments and work letter; checking pages and signatures0.5 → 0.0 d
  • Finding every term and applying each amendment in order1.5 → 0.1 d
  • Building the payment schedule and choosing the discount rate1 → 0.0 d
  • Checking the schedule against the lease0.8 → 0.0 d
  • Judgements on options, and writing down why0.8 → 0.2 d
  • Keying into the subledger and filing the evidence0.5 → 0.0 d

Estimated split for one office lease with an amendment, by hand and with the solution, in hours. The working solution's sample lease took 6 min 12 s of agent time and a 14-minute review.

How it works

How a lease moves

Eight agents read, cite, schedule and re-check every lease; the lease accountant decides every judgement and signs.

What comes in
Leases in4 sources · e-signature, mailbox, repository, upload
Agents at work
Intake agentlease + amendments
Then
Abstraction agent46 terms, cited
Then
Schedule agentpayments + values
Checker agentreads on its own
Then
Judgement agentboth treatments
A person decides
Lease accountantdecides, signs, exports
What comes out
Cited abstract
Schedule and values
Lease subledger
One case, step by step

One lease, from signature to the books

Kestrel & Vane Services has signed a 10-year lease for Floor 12 at 400 Market Street, Columbus — 24,000 rentable sq ft from Ashgrove Market Partners — and a First Amendment that moves its start. Here is what happens next, screen by screen, in the working solution.

  1. 01Morning

    The agents have already done the reading

    Grace Kim · Lease accountant

    Grace's day opens as messages from the agents, each with one next step: 3 decisions need her, 14 documents were read overnight, and the next notice date is in 62 days. At the top, the judgement agent says 400 Market Street needs one decision: 46 terms cited, 120 of 120 payments confirmed, and an open question on the renewal.

    “Everything else is checked: 46 terms cited, 120 of 120 payments confirmed. The open question is whether the 5-year renewal is reasonably certain.”

  2. 0206:12 – 06:16

    Three documents become one lease, as amended

    Intake agent and abstraction agent

    Three signed documents arrive from the e-signature system: the Office Lease (64 pages, signed Aug 18), the First Amendment (4 pages, Sep 22) and the Work Letter (11 pages). The intake agent groups them in date order and checks every page is present and signed. The abstraction agent reads 46 terms in 3 min 40 s; two come from the amendment — commencement moves from Oct 1 to Nov 1, 2026, and storage rent from $1,150 to $1,250 a month.

    Lowest confidence is 0.91, on the operating-expense base year — it doesn't change the schedule, because those costs are variable.

  3. 03One click

    Any number opens the page it came from

    Grace Kim · Lease accountant

    Every value carries a citation. Grace clicks the one on the new commencement date and the First Amendment opens at page 1, §1, with the passage highlighted: the Commencement Date is November 1, 2026, the landlord's work having been delayed by permit review. From there she can ask the agents about the passage or open the whole document.

  4. 0452 seconds

    The payment schedule builds itself

    Schedule agent

    120 monthly payments, Nov 2026 to Oct 2036: base rent free for six months (§4.3), then $96,000.00 a month (§4.1), rising 3% each Lease Year (§4.2), plus storage. Free rent, each step, the termination and renewal notices and expiry are marked in the margin, each linked to its clause. At the treasury's 10-year rate of 6.10%, the lease liability is $9,316,607 and the right-of-use asset $8,939,807, after the $376,800 allowance.

    Operating expenses and the $192,000 deposit are left out of the schedule: they are not lease payments.

  5. 051 min 52 s

    A second reading, without the first answers

    Checker agent

    The checker re-reads all three documents on its own: 120 of 120 payments agree, and so do 14 of 14 dates and options. One difference is settled from the documents themselves — the first draft took storage at $1,150 from the lease, but the First Amendment replaced it with $1,250 from commencement. Both readings stay on the record, and the terms screen marks each amended term with both citations.

    The checker never overwrites a value silently. A difference it cannot settle from the documents goes to a person.

  6. 0606:18

    One call needs Grace, with both treatments computed

    Judgement agent

    There is a 5-year renewal at 95% of market rent, notice due by Oct 31, 2035. The agent weighs the four kinds of factor in ASC 842-10-55-26, each cited: the rent is close to market; the landlord's allowance paid for most of the improvements; about 21% of Class A space is available; Real Estate has no plan to stay beyond 2036. It recommends leaving the renewal out, and shows both: 120 months at 6.10%, or 180 months at 6.45% with a right-of-use asset of $12,319,743.

    The judgement agent never decides a judgement. It always shows both treatments.

  7. 07She asks

    “What if the rate is 6.4%?”

    Grace Kim · Lease accountant

    Grace asks the agents in plain words. The schedule agent answers in the thread: at 6.40% the lease liability would be $9,179,832, $136,775 lower, and year-1 interest $593,675. It points out that 6.10% is the treasury's 10-year rate in table DR-2026-10, and offers to propose 6.40% as an edit.

    “Nothing has changed on the record.”

  8. 0809:47 · signed

    She decides, signs, and the lease is booked

    Grace Kim · Lease accountant

    Grace excludes the renewal with reason code J-02, “No significant economic incentive to renew”, and e-signs. Only then do the agents export: the lease is created in the lease subledger, the commencement journal is scheduled for Nov 1, the notice dates go to the real estate calendar with reminders to Marcus Delaney, and the evidence is sealed for the auditor — 46 citations, 120 checked payments, the decision and the signature.

    “On the books for Nov 1 — 18 days before the lease starts. Agent time 6 min 12 s, your review 14 minutes.”

  9. 09Amendment

    Riverside's Second Amendment: one part remeasured, one part a new lease

    Change watcher

    Signed Oct 6 for the Memphis distribution center, the amendment extends the lease 5 years and adds a 24,000 sq ft annex. The change watcher tests each part against ASC 842-10-25-8: the extension adds no right of use, so it is a modification — the liability goes from $2,431,590 to $6,755,232 at the revised 7-year rate of 6.25%. The annex is new space at $6.40 a sq ft against a broker survey of $6.35–6.55, so it is a separate lease, L-US-0287-A, with a liability of $959,416.

    Draft entry, Nov 1, 2026: Dr right-of-use asset $4,323,642 · Cr lease liability $4,323,642 — nothing posts until a second person signs.

  10. 10Second approval

    Over $2M, the controller signs too

    Helena Brandt · Corporate controller

    Grace approves the remeasurement with reason code M-01. Because the change is over $2M, it waits at the top of Helena's quarter close, with the separate-contract test behind it. The same screen shows her Q3 sign-off: every new lease, modification and termination decided, a roll-forward from $412.6M to $433.6M that ties to the subledger and the ERP, and drafted disclosures in which every number opens its source.

Who it’s for

Built for everyone who answers for the lease note.

The same quarter's leases, seen by the four people who carry them — what the work looked like, and what it looks like now.

GK
Grace KimLease accountant · Kestrel & Vane Group, Columbus · 1,146 leases
Lease accountant
Before
Abstracts 30–45 documents a month by hand on top of the close, and keeps the reasons for each judgement in a spreadsheet.
Now
Opens a lease already read, cited and checked twice; spends her time on the one judgement, asks the agents what-if questions, and signs.
MD
Marcus DelaneyReal estate manager, North America · 212 sites
Real estate manager
Before
Tracks renewal and break dates in one place while accounting tracks the same dates in another.
Now
Sees every notice date with days left, the clause, and what each choice — renew, let it lapse, negotiate — would do to the books before he decides.
HB
Helena BrandtCorporate controller · second approver over $2M · signs the quarter
Corporate controller
Before
Signs a lease note whose numbers have to trace to clauses and approvals she cannot see in one place.
Now
Gives the second approval on large remeasurements and signs the quarter from a roll-forward and disclosures where every number opens its source.
OF
Owen FairleyAudit senior, Ashby & Rowe LLP · read-only
External auditor
Before
Asks for the lease, the calculation and who approved it — lease by lease, file by file.
Now
Gets a packet per lease in his sample of 25: the signed documents, the cited abstract, the schedule, the judgements, the approvals and any changes, read-only.
Built on the engine

8 agents. Each with one job, and hard limits.

Eight agents read, cite, schedule and re-check every lease; the lease accountant decides every judgement and signs.

Intake agent

Collects leases, amendments and work letters from e-signature, the leases mailbox, the document repository and uploads, groups them into one lease in date order, and finds duplicates, missing pages, unsigned drafts and the language.

  • Never abstracts an unsigned document
  • Never deletes a file — anything incomplete is held, with the reason
Abstraction agent

Reads the lease and every amendment in order and abstracts 46 terms, each cited to its document, page and paragraph, with a confidence. Where an amendment replaces a clause, it keeps both citations and marks the term as amended.

  • Every value carries a citation
  • A term under 0.90 confidence goes to a person before the schedule is built
Schedule agent

Turns the terms into monthly cash flows, takes the rate from the treasury's discount-rate table for the term and currency, and computes the lease liability, right-of-use asset, straight-line cost, interest and maturities under ASC 842 and IFRS 16.

  • Never decides a judgement
  • Policy elections come from settings; variable payments and deposits stay out
Checker agent

Re-reads the lease without seeing the first answers, rebuilds the cash flows and confirms every payment, date and option row by row. It settles a difference only from the documents, such as a later amendment, and records both readings.

  • Never overwrites a value silently
  • An unresolved difference always goes to a person
Judgement agent

Finds every renewal, termination and purchase option, computes each treatment, weighs the contract, asset, entity and market factors with citations, and recommends one.

  • Never decides a judgement
  • Always shows both treatments
Change watcher

Reads every signed amendment, renewal and termination, tests each part against the separate-contract rule with citations, computes before and after values at the revised rate and drafts the entry.

  • Never posts an entry
  • Over $2M needs the controller as well
Notice-dates agent

Keeps the notice calendar from the abstracts, reminds the real estate manager at 180, 90, 30 and 10 days, shows what each choice does to the books and drafts the notice letter once a decision is recorded.

  • Never sends a notice to a landlord
  • Escalates to the controller at 10 days
Hidden-lease finder

Reads supplier contracts in force — 3PL, colocation, on-site supply — against the definition of a lease: an identified asset, no real right to substitute it, the economic benefits and the right to direct its use, each tested to the clause, with an estimated liability.

  • Never adds a lease without a person confirming it
  • A dismissal keeps its reason on record for the auditor
Lease accountant

Decides every judgement; controller signs the quarter. The agents propose; a named person decides.

Ask in plain words

Ask the agents, in plain words

Ask about any lease, payment, option or date — or tell the agents what to change. Every answer cites the clause, and nothing changes the record until a person approves it.

Which leases start this month?

Two leases start in the next 30 days, both on Nov 1, 2026: 400 Market Street, Floor 12 — liability $9,316,607, waiting for your decision on the renewal — and the forklift fleet, Schedule 7 — liability $1,488,655, ready to approve.

Why exclude the renewal?

In short, nothing pulls Kestrel & Vane into staying. The renewal is at 95% of market rent, the landlord paid for most of the build-out, there's comparable space around, and Real Estate plans to leave in 2036. That's why I recommend J-02. If Marcus's plan changes, I will ask you to reassess.

Which notice is due next?

The next notice is Monterrey Plant 2: renewal notice due Dec 15, 2026, in 62 days. Marcus Delaney decides; I've shown him what each choice does to the books.

Where do the agents disagree?

One lease has two readings open: São Paulo, rent index IPCA in the lease against IGP-M in the second amendment. This quarter I agreed with the first reading on 98.6% of terms.

Every screen

The working solution, as it ships.

13 screens from the working solution, on its sample data. Pick one to see it large.

TodayMessages from the agents, each with one next step: the decision a lease needs, an amendment that changes the books, two readings to settle.
The lease, in conversation with the agentsEach agent posts what it did with its citations; the payment schedule and the accounting values sit beside the thread, with the clause behind every mark.
Every citation opens its pageThe First Amendment at page 1, §1, with the new commencement date highlighted.
Terms and sourcesAll 46 terms with their confidence and citation, filters for low confidence and amended terms, and the clause each amendment replaced.
The judgementThe four kinds of factor, each cited, and both treatments side by side — term, rate, right-of-use asset and liability — with a reason code.
Ask what ifA different rate, answered in the thread with the change in liability, asset and interest, without touching the record.
Signed and exportedThe decision with its reason code and e-signature, then each export step: subledger, commencement journal, notice dates and sealed evidence.
Add leasesDocuments grouped into leases with the reasons, and the ones that need a look: a missing page, an unsigned amendment, a duplicate.
AmendmentsEach part of an amendment tested against the separate-contract rule, the remeasurement before and after, and the draft entry.
Notice datesThe next six months of notice dates, who decides, and what each choice would do to the books.
Found leasesSupplier contracts tested against the definition of a lease, clause by clause, with an estimated liability for a person to confirm or dismiss.
The quarter closeA second approval waiting for the controller, the liability roll-forward tied to the books and the drafted disclosures.
Evidence for auditorsThe auditor's request, a packet per lease in the sample of 25, and a read-only view of what the auditor sees.
Governance

Built for the audit: cited, read twice, signed.

Every value cites its pageEach of the 46 terms opens the passage it came from, with the document, page and paragraph. An amended term shows the original clause and the amendment that replaced it.
Every lease is read twiceA checker agent re-reads every lease without the first answers before a person sees it. That setting is locked, and a difference it cannot settle from the documents goes to a person with both readings.
A person decides every judgementRenewal and termination options, edits, remeasurements and found leases are decided by a named person with a reason code. Approvals carry an e-signature, and nothing is exported until the lease accountant signs.
Two keys over $2MA remeasurement or new lease that changes the liability by more than $2M needs the controller's signature as well, and so does any change to policy elections or discount rates.
Agents never act on the outside worldNo journal entry posts until a person approves it. The agents never send a notice to a landlord, never add a lease nobody confirmed and never overwrite a value silently.
An audit trail the auditor can readEvery action by an agent or a person is recorded with its evidence, and entries cannot be edited or deleted. The external auditor gets a read-only view and a packet per lease in the sample.
Configuration

Your accounting policy, not ours

The elections and thresholds the agents apply are settings. Every change is logged with the old and new value, and policy and rate changes need the controller.

SettingDefaultChoose from
Short-term exemptionOnOn · Off — leases of 12 months or less with no purchase option reasonably certain stay off the balance sheet
Combine lease and non-lease parts — propertyOff: fixed service charges are split outOn · Off
Combine lease and non-lease parts — equipmentOn: maintenance in a fleet lease stays in the paymentOn · Off
Capitalisation threshold, equipment$25,000Any amount; leases below it are expensed
Confidence below which a person reads the term0.90Any level; terms under it go to the lease accountant before the schedule is built
Second approval above$2,000,000Any change in liability; above it the controller signs too
Notice-date reminders180, 90, 30 and 10 daysOn · Off; escalates to the controller at 10 days
A second agent reads every leaseOnLocked: no lease reaches a person before the checker has re-read it
Connections

Works with the systems your leases already live in

E-signature and the leases mailboxsigned leases, amendments and side letters, checked every 15 minutes
Document repositoryexisting lease documents, re-read and cited — 4,872 in the sample group
Treasury discount-rate tablesincremental borrowing rates by entity, currency and term
Lease subledger and ERP general ledgerleases created on approval; journals post on approval
Real estate systemsites, square footage and the notice calendar
Supplier contractscontracts in force, scanned for leases hidden inside services
What it changes

The difference, in numbers.

Every figure is labelled: a target the solution is built to, an estimate, a typical published result, or a proven one.

target
100%
of payments re-read by a second agent before a person sees the lease
120 of 120
400 Market Street, Floor 12
target
1day
to test each amendment as a modification and draft the remeasurement
Oftenfound at audit
With agents≤ 1 day
target
Minutes
per lease, against 2–6 hours by hand
By hand2–6 h
With agents≈ 6 min + review

“demo” = seen in the working solution, on its sample lease data · “target” = the design goal, measured in the live solution · “estimated” = our estimate · “typical” = published figures (RSM, Top 5 considerations when implementing an ASC 842 technology solution — two to six hours of abstraction per lease, more for foreign-language leases) · Standards named as context: ASC 842-10-15-3, 842-10-25-8 and 842-10-55-26; IFRS 16. Kestrel & Vane Group, Ashgrove Market Partners LLC, Ashby & Rowe LLP and the people named on this page are fictional — characters and sample data in the working solution.

Questions

What controllers and lease accountants ask us.

What is lease abstraction?

Lease abstraction is reading a lease and its amendments and pulling out the terms that matter — dates, rent and escalations, free rent, incentives, options and notice dates — into structured data, so the lease can be accounted for under ASC 842 or IFRS 16. Lease Abstraction does it with eight agents that cite every term to its page, build the payment schedule and accounting values, re-read every payment, and bring each judgement to the lease accountant to decide and sign.

How does AI lease abstraction handle amendments?

The abstraction agent reads the lease and every amendment in date order. Where an amendment replaces a clause, it keeps both citations and marks the term as amended, so the abstract shows the lease as amended. The change watcher tests each signed amendment against the separate-contract rule (ASC 842-10-25-8) and drafts the remeasurement or the new lease.

Does the AI decide whether a renewal is reasonably certain?

No. The judgement agent weighs the contract, asset, entity and market factors with citations, computes both treatments and recommends one. The lease accountant decides with a reason code and an e-signature, and nothing is exported until she does.

How do we know the payment schedule is right?

A checker agent re-reads every lease without seeing the first answers, rebuilds the cash flows and compares them row by row with every date and option. It settles a difference only from the documents and keeps both readings; anything else goes to a person. On the sample lease, 120 of 120 payments and 14 of 14 dates and options agreed.

Does it produce both ASC 842 and IFRS 16 values?

Yes. From one abstract the schedule agent computes the lease liability, right-of-use asset, straight-line cost, interest and maturities under ASC 842 and IFRS 16, for entities that keep both books. Index-linked rent, such as a CPI review, is remeasured under IFRS 16 and treated as a variable cost under ASC 842.

Can it find leases hidden in service contracts?

Yes. The hidden-lease finder reads supplier contracts in force — 3PL, colocation, on-site supply — and tests each for an identified asset, substitution rights, the economic benefits and the right to direct use, citing the clause for each. A person confirms or dismisses every candidate, and a dismissal keeps its reason for the auditor.

Do people stay in control?

Yes. The agents read, compute and propose; people decide. Judgements, edits and remeasurements need a reason code, approvals need an e-signature, the controller co-signs anything over $2M, nothing posts until a person approves it, and the agents never send notices to landlords.

How long does it take to go live?

The Agentic Solution Engine builds and deploys it from your requirements and documents — your accounting policy, discount-rate tables and a sample of your signed leases — and it goes live once every quality gate has passed. We will walk you through it on your own leases first.

See it on
your leases.

We'll run Lease Abstraction on a sample of your own signed leases and amendments.