Banking AI agent · Allowance & loan review
Allowance Governance & Loan-Review AI Agent
Assemble the support behind each allowance segment and qualitative factor, and keep the loan-review challenge record; management sets the estimate under the April 2023 policy statement, and the CEO and CFO certify it.
- Typical delivery
- 4–6 weeks
- Deployment
- Your stack
- Certification
- Officer-signed
- After launch
- Agent Care
What this agent does
Assembles the support, not the estimate
In
- 01
A quarter closes, and the loan tape is pulled from supported core, servicing and risk-rating systems.
- 02
A segment is reconciled to the general ledger, and any variance is named rather than carried as a plug.
Reason
- 03
A model input is traced back to the run, the period and the extract it was actually drawn from.
- 04
A qualitative factor is drafted with a directional rationale and a rationale for the amount moved.
- 05
An overlay is tested against a live basis document, and a basis that has lapsed is flagged.
Decide
- 06
A back-test compares prior estimates with realised write-offs, in aggregate and by portfolio.
- 07
A loan-review sample is stratified, and the file, covenant and rating tests are recorded per credit.
Out
- 08
A rating challenge is tracked to a response, and the lower rating stands until a concurrence is logged.
- 09
A write action runs only inside the approval boundaries agreed during implementation.
Product statement
The agent assembles the support; management sets the allowance, the CEO and CFO certify, and the Call Report adds officer and director attestations.
Example workflow
One quarter, tape to certification
- 1Quarter-end tape receivedCore, servicing, risk-rating and charge-off systems
- 2Support assembledSegmentation, model inputs, factor series, overlay basis and prior-period estimates
- 3Rationale draftedSegment memo, factor rationale, overlay basis and confidence
- 4Controls appliedLedger reconciliation, factor-source checks, overlay-expiry checks and confidence threshold
No human action required
Stages 1 to 4 run unaided, and no number is set at any of them — the agent is assembling support, and the credit lane opens at the confidence gate.
Goes to management to approve.
Adds a loan-review read first.
Management approval
The pack is held with its source series, its open challenges and the confidence.
Approve · Amend · Send to loan review
Approved — released to the board pack
- 6Allowance systems updatedOnly where write access and approval policy allow it
- 7Outcome evaluatedAmendment distance, challenge outcomes, examination findings and out-of-period corrections
Amendments
Every management amendment is counted in the evaluation.
What should not run autonomously
Human approval stays in control
Outside the boundary — human approval required
8 items
- Setting the allowance balance or the provision.
- Call Report attestations — officer, and directors by charter.
- Assigning the final risk rating or classification.
- Concurring with the line on a challenged rating.
Automation boundary
Agent acts unaided
- ✓Assemble the segment support and reconcile the tape to the ledger.
- ✓Trace each factor and model input to its source and period.
- ✓Carry the back-testing series forward, by portfolio.
- ✓Draft the rating challenge, and hold the pack for management.
Writes run only inside the boundaries agreed at implementation, and never ahead of approval.
- Approving or extending a management overlay.
- Independent validation of the loss-estimation process.
- Changing segmentation, forecast period or reversion.
- Changes to methodology, thresholds or approval rules.
Example output
One qualitative factor, annotated
Everything the agent assembles is attached to the series it was drawn from.
Allowance support output · single factor
Illustrative example- Segment
- CRE — non-owner occupied
- Factor
- Past-due and nonaccrual severity
- Movement
- +14 bps
- Source of record
- Delinquency series
- Confidence
- 89%
- Support status
- Directional and quantum rationale
As received
Taken from the delinquency series and the segment tape — nothing on this side is written by the agent.
Source facts used
- Delinquency series
- Nonaccrual roll-forward
- Segment charge-offs
Why this quantum
Both the direction and the amount trace to the series — neither is left as a residual.
What the score decides
Below the configured threshold the factor picks up a loan-review read first.
Action
ApproveAmendSend to loan reviewValue
Where AI adds value
The same four claims, placed at the point in the workflow where each one applies.
Where the value lands
Value 01 – 04
Every segment
From the quarter-end tape
Write the reasoning down
Examination findings named documentation first and factor support second — Federal Reserve, March 2025.
Support decides the estimate
Examiners generally should accept a supported, GAAP-compliant estimate — policy statement, April 2023.
Challenge, not authorship
The independent read on a booked credit, not the origination memo — the reviewer did not approve it and reports to the board (85 FR 33278).
Build an evidence trail
The factor, the evidence it rests on and the officer who certified stay on the allowance.
Integrations
Typical integrations
Five system groups connect to the same agent. Which of them are in scope is decided in discovery.
Core and servicing
- FIS
- Fiserv
- Jack Henry
- Finastra
- loan servicing
Allowance models
- Abrigo
- Moody's Analytics
- Wilary Winn
- in-house models
Credit and loan review
- nCino
- Baker Hill
- Credit Quest
- workpapers
Agent
Allowance support & loan review
- Reads the tape
- Assembles the support
- Holds for approval
Close and reporting
- Workiva
- close tooling
- Call Report
- disclosure
Observability & evaluation
- OpenTelemetry
- 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 allowance
The six nest tightly, outer to inner. What escapes them all is listed in the map below.
L6 · Outermost — last line of defence
Inward → L1 · closest to the model
- L1 – L2
- Test whether the support may stand
- L3
- Puts the release in management's hands
- L4 – L5
- Keep the factor and the evidence behind it
- L6
- Falls back to support assembly when signals degrade
How Nestack evaluates it
Evaluate the support workflow — not only the finished memo.
Coverage runs the whole depth of the workflow, and every layer is cut by slice.
Surface — the pack the board and the examiner see
- E1Final-output evaluationDid every asserted factor trace to the series behind it?
- E2Step-level evaluationDid the agent use the right tape, methodology and segmentation configuration?
- E3Tool evaluationDid it read and write the correct segment and the correct period?
- E4Confidence calibrationDo low-confidence factors actually attract more management amendments?
- E5Slice evaluationHow does performance change across specific portfolio segments?
- E6Business outcomeHow many factors were amended, or corrected out of period after certification?
Floor — the outcome the institution answers for
Failure modes
Where each failure originates in the agent
Seven failure modes, each placed at the stage where it originates.
Agent lifecycle
Direction of processing →
01 · Retrieval
1 mode
- EA-03
Missing basis document
Carried-forward overlay has no live basis on file.
Stage gathers
Loan tape, factor series, overlays and prior estimates
02 · Reasoning
2 modes
- EA-04
Unquantified factor move
Factor moves with its series but carries no quantum basis.
- EA-06
Assumption change buried
Reversion change sits inside the aggregate variance.
Stage proposes
Segment memo, factor rationale and confidence
03 · Tool / write
2 modes
- EA-02
Stale sample stratification
Review sample is drawn on last quarter's strata.
- EA-05
Concurrence unrecorded
Challenge closes with no reviewer concurrence logged.
Stage writes
Only where write access and approval policy allow it
04 · Output
1 mode
- EA-01
Unreconciled variance
Tape-to-ledger gap carried as a plug.
Stage returns
The support pack behind the estimate management set
05 · Change / Version
1 mode
- EA-07
Silent methodology drift
A model or rule change alters what the support asserts.
Stage tracks
Model, prompt, factor rules and segmentation config
- Sev-1 · support asserted outside the boundary
- Sev-2 · a wrong basis reaches the allowance
- Sev-3 · source degrades, factor goes to review
Affected slices
One weak segment can sit under a healthy total
A portfolio-level support score can read as adequate while a few segments absorb most of the amendments. Nestack reports the amendment rate by segment, not only in total.
Slice performance — reported separately, not only in aggregate
Illustrative example| Slice | Failure rate | Lift | Lift vs. threshold | Status |
|---|---|---|---|---|
| Acquired and purchased pools | 6.9% | 3.6× | Review | |
| Management overlays | 4.8% | 2.5× | Review | |
| CRE concentrations | 3.1% | 1.6× | Watch | |
| Seasoned retail segments | 1.8% | 0.9× | Normal |
Bar: amendment-rate lift vs. seasoned-retail baseline · scale 0–4.0× · tick marks the 2.0× review threshold
2 of 4 slices over threshold
Evidence-linked improvement
The loop closes on a test, not a note
A cycle ends when the unsupported factor is a case the next release has to catch. That suite is what the next estimate supported is measured against.
Improvement cycle · five stages
Switchback — the path turns at Improve and returns at Learn
- 01
Detect
Amendment rate rises in a portfolio segment.
- 02
Diagnose
The qualitative overlay nobody could point to a source for is read back until the cause narrows to one.
- 03
Improve
The correction is numbered and the factors behind it are pinned to it.
- 04
Verify
Every touched factor case runs again, and one fail stops the release.
- 05
Learn
It is held permanently, and the segmentation rules shift alongside it.
Learn → Detect
The return edge. The next quarter is detected against 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, support workflow, evaluation, integration, then production validation and handover.
Workstream
Week 1Week 2Week 3Week 4Week 5Week 6
- 01Allowance workflow discovery and boundary mapping.Week 1
- 02Core, model and review source assessment.Week 1, Week 2
- 03Methodology, factor and segmentation rule mapping.Week 1, Week 2
- 04Loan-tape ingestion and reconciliation.Week 2
- 05Support assembly and source binding.Week 2, Week 3
- 06Confidence scoring and challenge routing.Week 3
- 07Management approval workflow.Week 3, Week 4
- 08Core and loan-system integration.Week 5
- 09Factor and back-testing cases.Week 4, Week 5
- 10Guardrails and challenge controls.Week 4
- 11Portfolio-trail instrumentation.Week 5, Week 6
- 12Deployment, documentation and Agent Care handover.Week 6
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 portfolio, one quarter | ProductionProduction credit systems | AdvancedMultiple portfolios / entities |
|---|---|---|---|
| Introduced at Pilot | |||
| Support and challenge assembly | ✓ | ✓ | ✓ |
| Management approval | ✓ | ✓ | ✓ |
| Support-completeness baseline | ✓ | ✓ | ✓ |
| Introduced at Production | |||
| Reporting by segment | — | ✓ | ✓ |
| Challenge workflow in your systems | — | ✓ | ✓ |
| Approved write-back | — | ✓ | ✓ |
| Core and loan-system integration | — | ✓ | ✓ |
| Introduced at Advanced | |||
| Multi-charter reporting rules | — | — | ✓ |
| Multi-stage credit approvals | — | — | ✓ |
| High portfolio volume | — | — | ✓ |
| Multi-portfolio review controls | — | — | ✓ |
| Build price | From $5,000 | From $8,000 | Custom quote |
- Final build price
- Confirmed after discovery based on integrations, workflow complexity, portfolio volume, approval controls and deployment requirements.
- Separate from build
- Build 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 bring
We build with it
01Your methodology document and segmentation
→Methodology, factor and segmentation rule mapping
Week 102Representative prior-quarter allowance packs
→Loan-tape ingestion, reconciliation and the support baseline
Week 203Your documented qualitative-factor definitions
→Factor-definition mapping and automation-boundary definition
Week 104Access to relevant APIs, feeds or exports
→Core, model and loan-review assessment, then integration setup
Week 205Estimates you would not want examined
→Adjustment cases and the evaluation suite
Week 406What no qualitative factor may assert
→Confidence scoring, challenge routing, guardrails and approval controls
Week 307Named credit officers to review the pack
→Management approval workflow, then pilot and production validation
Weeks 5–6
Nothing else is required
Deployment, documentation and Agent Care handover are ours.
Delivery timeline
Four phases across six weeks
Bands are drawn from the quarterly calendar rather than the plan, so the fifth holds two phases.
Phase
W1
W2
W3
W4
W5
W6
- DiscoveryW1
- BuildW2 – W3
- EvaluateW4 – W5
- Pilot & LaunchW5 – W6
Week focus
W1Allowance workflow discovery, factor mapping and the automation boundary
W2Source integration and the support-assembly baseline
W3Support workflow, confidence logic and approval controls
W4Evaluation suite, factor-support checks and failure-mode testing
W5Loan-system integration, a pilot quarter and targeted corrections
W6One quarter closed under the chief credit officer, then Agent Care handover
- Reading the band
- Each bar covers only the weeks its work is named in. The week 5 overlap is real, not padding.
- At the end of W6
- The closing checks pass on a live quarter, and Agent Care takes monitoring on.
- Duration
- Six-week plan shown · typical delivery 4–6 weeks depending on scope confirmed in discovery.
Next step · Banking AI agent
Build an allowance-support agent around your credit governance.
Show us your methodology, your factor definitions and who signs the pack. We found no enforcement action centred on allowance manipulation — the pressure here is examination, not penalty.
- Typical delivery
- 4–6 weeks
- Deployment
- Your core and models
- Management approval
- Officer-signed
- After launch
- Agent Care available
Nestack Agents · Allowance governance & loan review
AGT-BK-16 · Agent Care available after launch