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Real Estate AI agent · Expense recovery

Operating-Expense Reconciliation AI Agent

Build the expense pool from the ledger, cite the clause behind the line, hold the pack for the asset manager who issues a statement a tenant audits, not a price for a buyer.

4–6 weeksTypical delivery
Your stackDeployment
Pre-issuanceManager issues
Agent CareAfter launch

What this agent does

Builds the pack, not the decision to charge

In
01

A cost is coded in the ledger, and the pool is drawn from the trial balance an auditor will later be shown.

02

A line is tested against that lease clause, because the same account is recoverable next door and excluded here.

Reason
03

A line no clause covers stays unclassified and is raised for a person, never defaulted into the recoverable pool.

04

A gross-up runs on the variable components the clause names, and on the base year too where the lease has one.

05

A cap is run on its own convention — compounded or not, rolling or base-year — and never on a house convention.

Decide
06

A share is computed on the denominator the clause names; ANSI/BOMA Z65.1-2024 measures area, never the pool.

07

A statement falls due on that lease's own date, and the objection, inspection and billing-bar clocks run apart.

Out
08

A statement is not a tenant letter: this proves what may be charged, and a commercial lease has no approved form.

09

Execute write actions only inside the approval boundaries agreed during implementation.

Product statement

The agent assembles the pool, the allocation and the pack; a named asset manager issues the statement, and the tenant tests it against the clause.

Example workflow

One tenant, ledger to statement pack

AgentHuman
1Reconciliation year closesGeneral ledger, lease abstracts, estimate billings and the prior-year statement
2Pool assembledInclusions, exclusions, amortisations and gross-ups, each with its lease citation
3Pack draftedShare, estimate-to-actual bridge, unclassified lines and confidence
4Controls appliedClause-citation checks, cap and gross-up arithmetic, clock checks and confidence threshold
No human action required

Stages 1 to 4 run unaided, and nothing is issued or billed at any of them — the agent is assembling, and the asset manager's lane opens at the confidence gate.

5DecisionBranches at the confidence threshold
High confidence

Goes to the asset manager to approve.

Low confidence

Adds a lease-counsel read first.

Manager approval

The pack is held with its clause citations, its unclassified lines and the confidence.

Approve · Correct · Send to counsel review
Approved — released for issue
6Billing systems updatedOnly where write access and approval policy allow it
7Outcome evaluatedCitation coverage, corrections, on-time delivery and audit outcomes
Corrections

Every manager correction is counted in the evaluation.

What should not run autonomously

Human approval stays in control

Outside the boundary — human approval required8 items
Issuing or certifying the reconciliation statement.
Deciding that a cost is recoverable under a clause.
Resolving or settling a tenant audit claim.
Signing the California attestation under § 1950.9.
Automation boundaryAgent acts unaided
Build the expense pool from the ledger, one coded line at a time.
Carry the lease clause with the line it puts there.
Compute the share, the cap and the bridge on the clause.
Run the lease clocks and assemble the file behind an audit request.
Any write happens inside the boundaries agreed at implementation, never ahead of the manager.
Re-billing a year already invoiced or closed.
Changing the allocation method for a tenant.
Granting an audit right the clause does not give.
Changes to clause, cap or gross-up rules.

Example output

One pool line, annotated

Everything the agent assembles is attached to the invoice and the clause behind it.

Reconciliation output · single tenantIllustrative example
Tenant
Pool line
Amount in pool
Clause of record
Confidence
Who issues
Neighbourhood retail
Management fee billed on the property, not the common area
$41,860.00
Lease § 4.4.1
84%
Named asset manager
As receivedTaken from the vendor invoice and the lease exclusion clause — nothing on this side is assumed by the agent.
Sources used Vendor invoice on file Lease exclusion clause Prior-year statement
Why it is raisedClear Lake Center (18 July 2013) held a fee like this limited to the common area.
ActionApproveCorrectSend to counsel review
What the score decidesBelow the configured threshold the pack picks up a counsel read before the manager sees it.

Value

Where AI adds value

The same four claims, placed at the point in the workflow where each one applies.

Where the value landsValue 01 – 04
Every tenantFrom the ledger and the lease
03Assembly

Work from the clause

Draw on the clause as written — reported case law on late billing and gross-ups is thinner than assumed.

01Approved path

The clause decides, not custom

Routine pools, shares and packs arrive already assembled.

02Human review

Send review to the contested lines

Uncited lines and unusual gross-ups are marked, so the counsel read starts where the exposure concentrates.

04Build an evidence trail

The cost, the clause it was tested against and the manager who issued stay on the statement.

Integrations

Typical integrations

Five system groups connect to the same agent. Which of them are in scope is decided in discovery.

General ledgerSage Intacct · NetSuite
Oracle · SAP exports
Property accountingYardi Voyager · MRI
RealPage · Entrata
Lease dataLease abstract libraries
Clause and exclusion records

Agent

Reconciliation assembly

Reads the ledger
Cites the clause
Holds for issue

Tenant billingYardi CAM · MRI recovery
Billing and AR exports
Observability & evaluationOpenTelemetry · Langfuse
Supported monitoring/evaluation sources

Integration availability depends on the client's existing systems and API access.

Agent controls

Six layers between the model and the statement

Six bands, each inside the last. Anything that survives them is drawn in the map below.

L6 · Outermost — last line of defenceInward → L1 · closest to the model
L6Rollback / safe modePull assembly back to pool-only when evaluation or production signals degrade.Roll back
L5Version monitoringTrack model, prompt, clause-rule and property-configuration changes.Track
L4TraceabilityRecord the invoice, the clause, the allocation, the corrections and the approval time.Record
L3Manager approvalHold the pack for the named asset manager; it governs release, not whether a line is recoverable.Gate
L2Policy guardrailsTest each line against the clause set abstracted from that lease; a failure returns the pack.Restrict
L1Confidence thresholdsRoute low-confidence packs to a counsel read before the manager sees them.Require review
Model corePack produced — pool, exclusions, share, bridge, unclassified lines and confidence
L1 – L2Test whether a line may stand
L3Puts the release in the manager's hands
L4 – L5Keep the cost and the clause behind it
L6Narrows to pool assembly when signals degrade

How Nestack evaluates it

Evaluate the assembled pack — not only the total at the bottom.

Coverage runs the whole depth of the workflow, and every layer is cut by slice.

Surface — the statement the tenant receives
Depth of coverage ▼
E1Final-output evaluationDid each pool line match the invoice and the clause it came from?
E2Step-level evaluationDid the agent use the right lease, cap convention and gross-up rule?
E3Tool evaluationDid it read the correct tenant and the correct reconciliation year?
E4Confidence calibrationDo low-confidence packs actually attract more manager corrections?
E5Slice evaluationHow does performance change across specific lease and tenant types?
E6Business outcomeHow many lines were corrected or contested after the statement went out?
Floor — the money the landlord gives back

Failure modes

Where each failure originates in the agent

Seven failure modes, set at the point the statement pack first breaks.

Agent lifecycleDirection of processing →
01 · Retrieval1 mode
FS-03

Stale trial balance

A post-close reclassification lands after the pool was drawn.

Stage gathersLedger lines, lease clauses, estimates and areas
02 · Reasoning2 modes
FS-04

Fee billed on the property

A management fee is charged on the whole property, not the common area.

FS-06

Cap run on house convention

A non-compounded cap is run as compounding and widens each year.

Stage proposesPool, exclusions, share, bridge and confidence
03 · Tool / write2 modes
FS-02

Unclassified line defaulted

A line no clause covers is placed in the pool rather than raised.

FS-05

Base year not grossed up

Gross-up runs on the comparison year alone and compounds.

Stage writesOnly where write access and approval policy allow it
04 · Output1 mode
FS-01

Statement lands late

The pack goes out on the house calendar, not the lease date.

Stage returnsThe statement the manager issues and the tenant tests
05 · Change / Version1 mode
FS-07

Silent clause drift

A rule change widens what the agent treats as recoverable.

Stage tracksModel, prompt, clause rules and property config
Sev-1 · a charge leaves the boundary Sev-2 · a wrong line reaches the manager Sev-3 · source degrades, pack to review

Affected slices

A property figure can hide one tenant

A property-level clause-citation figure can look sound while a few tenants absorb nearly all of the lines no clause covers. Nestack reports the uncited-line rate by slice, not only in total.

Slice performance — reported separately, not only in aggregateIllustrative example
SliceFailure rateLift Lift vs. thresholdStatus
Base-year office leases6.8%3.7× Review
Capped controllable expenses4.6%2.5× Review
Ground-floor retail tenants2.9%1.6× Watch
Single-tenant net leases1.7%0.9× Normal
Bar: uncited-line-rate lift vs. single-tenant net lease baseline · scale 0–4.0× · tick marks the 2.0× review threshold 2 of 4 slices over threshold

Evidence-linked improvement

The season closes into the regression suite

The loop shuts when the disputed charge is a regression case. That suite is what the next statement issued is measured against.

Improvement cycle · five stagesSwitchback — the path turns at Improve and returns at Learn
01Detect

Uncited lines rise in one lease type.

02Diagnose

The management fee that was billed on the property, not the common area, is read back until the cause narrows to one.

03Improve

Any change ships numbered, with the statements that caused it attached.

04Verify

One statement case still failing is enough to hold the release.

05Learn

One case joins the suite, one line joins the recovery record.

Learn → DetectThe return edge. Next season's detection meets a suite one case longer.

Typical build scope

Twelve workstreams across six weeks

The build scope read against the delivery timeline. Week structure follows the six-week plan — discovery, sources, reconciliation workflow, evaluation, integration, then production validation and handover.

Workstream Week 1Week 2Week 3Week 4Week 5Week 6
01Recovery workflow discovery and boundary setting.
02Ledger and lease source assessment.
03Lease clause, exclusion and gross-up rule mapping.
04Ledger extraction and pool assembly.
05Allocation, gross-up and cap arithmetic.
06Confidence scoring and exception routing.
07Manager approval workflow.
08Ledger and billing integration.
09Exclusion and gross-up cases.
10Guardrails and issuance controls.
11Statement-trail instrumentation.
12Deployment, documentation and Agent Care handover.
12 workstreams · 6 weeks · bar shows the weeks a workstream is active — several run in parallel Final scope and sequence confirmed in discovery

Engagement tiers

What each tier includes

Rows are the capabilities named in each tier's scope. Higher tiers include everything below them.

Capability✓ in scope · — not at this tier PilotOne property, one season ProductionProduction billing systems AdvancedMultiple properties / states
Introduced at Pilot
Assembly to your clause set
Manager approval
Clause-citation baseline
Introduced at Production
Reporting by tenant
Approval workflow in your systems
Approved write-back
Ledger-and-lease integration
Introduced at Advanced
Multi-clause and multi-state rules
Multi-stage landlord approvals
Large tenant rosters
Multi-property recovery controls
Build price From $5,000 From $8,000 Custom quote
Final build priceConfirmed after discovery based on integrations, workflow complexity, transaction volume, approval controls and deployment requirements.
Separate from buildBuild pricing is separate from recurring Agent Care, which covers managed monitoring, evaluations, incidents and verified improvements after launch.

What we need from you

What you bring, and what we build with it

Each input maps to a piece of build scope and a week in the delivery timeline.

You bringWe build with it
01Your lease abstracts and the clauses they carry Ledger and lease ingestion and clause bindingWeek 1
02The statement issued last year for each tenant Pool-assembly baseline and the uncited-line registerWeek 2
03Your cap, gross-up and amortisation conventions Lease clause, exclusion and gross-up rule mappingWeek 1
04Access to relevant APIs, feeds or exports Ledger, lease and billing assessment, then integration setupWeek 2
05Statements you would not want audited Audit cases and the evaluation suiteWeek 4
06What no statement may bury Confidence scoring, exception routing, guardrails and approval controlsWeek 3
07Named asset managers to review packs Manager approval workflow, then pilot and production validationWeeks 5–6
Nothing else is required Deployment, documentation and Agent Care handover are ours.

Delivery timeline

Four phases across six weeks

The plan is measured in worked weeks and not in slide space, and so week five carries two bands.

Phase W1W2W3W4W5W6
Discovery W1
Build W2 – W3
Evaluate W4 – W5
Pilot & Launch W5 – W6
Week focus W1Recovery workflow discovery, clause mapping and the automation boundary W2Ledger and lease integration and the pool-assembly baseline W3Reconciliation workflow, confidence logic and approval controls W4Evaluation suite, clause-citation checks and failure-mode testing W5Billing integration, pilot tenants and targeted corrections W6One reconciliation season run under the asset manager, then Agent Care handover
Reading the bandA bar covers the weeks its work is named in, and nothing else. The week 5 overlap is real, not padding.
At the end of W6Once the season clears, Agent Care takes over the running agent.
DurationSix-week plan shown · typical delivery 4–6 weeks depending on scope confirmed in discovery.

Next step · Real Estate AI agent

Build a reconciliation agent around the clauses your own leases set.

Show us the leases, the ledger and the clocks each clause sets. Your asset manager is the person who signs the statement and then defends it to a tenant auditor holding the invoices. Underwriting reads an operating statement to price a building; this builds one a tenant can audit — and we found no error statistic for this workflow with a published sample, method or date, so the case is the contract, line by line.

Nestack Agents · Expense recoveryAGT-RE-20 · Agent Care available after launch