Stress-Test Data in Supervisory Reporting: The EBA Simplification ITS (Module 4) — Impacts & Challenges
The entire stress test — 3-year projections, adverse CET1 trajectories, Pillar 2 Guidance — rests on a single number: the starting point. The EBA stress-test methodological note sets how that number is built, and the EBA reporting-simplification ITS (Module 4) now moves the stress-test data collection into regular supervisory reporting, which reshapes how banks must evidence it. Get either wrong and every downstream projection is compromised.
Why the Starting Point Is the Most Under-Rated Variable in Any Stress Test
The adverse scenario gets the headlines. The starting point decides the outcome. Every basis point of mis-anchoring propagates through the 3-year projection horizon and lands directly in the final CET1 depletion.
Reference Balance Sheet
Complete asset, liability and off-balance sheet perimeter at T-0 — frozen for the duration of the exercise under the static balance sheet assumption.
COREP C01→C08 + FINREP F01→F18NPE & IFRS 9 Stage Allocation
Starting stage 1 / 2 / 3 distribution sets the baseline for provision trajectory. Mis-allocation at T-0 compounds into €100m+ coverage gaps by year 3.
Must reconcile to FINREP F18.00P&L & CET1 Waterfall
Pre-stress net income, dividend assumptions, AT1 coupons, DTA and prudential filters all shape the CET1 start. Each element is in scope of the methodological note and of the stress-test templates that the ITS folds into regular reporting.
COREP CA1 lines 1–73What a clean starting-point looked like on a live material-CET1 case
Anonymised European G-SIB. The reconciliation grid, the NPE stage-allocation call, and the RWA-engine parameters that survived the supervisory challenge. Mandate-specific figures withheld; public-data calibration on request. One-pager written for CFOs, not modellers.
CFO Capital-Impact Case · coming soon Publishing autumn 2026.3 Structural Shifts the Reporting ITS Introduces
Prior exercises collected stress-test data through ad hoc EBA templates outside the reporting framework. The ITS moves that collection into regular supervisory reporting: the same definitions, data-point model and data-quality rules as COREP and FINREP. The starting-point rules themselves stay in the EBA methodological note.
Codified Scope & Granularity
The ITS templates define line by line what is reported for the starting balance sheet, on the common reporting data-point model. In practice this closes historical grey zones on trading-book repo, off-balance commitments, held-for-sale portfolios and participations in non-consolidated subsidiaries.
Reconciliation to Regular Reporting
With stress-test data inside the ITS framework, the starting point must tie to (i) audited IFRS financial statements, (ii) COREP and FINREP returns on the same reference date and (iii) internal management accounts. EBA data-quality checks apply across templates; every discrepancy must be explained and signed off.
Static Balance Sheet, Evidenced in Reporting
The static balance sheet remains an assumption of the methodological note, not an ITS provision. Departures are limited to the categories the methodological note allows, such as committed non-performing run-off and regulatory-driven disposals, and are assessed by the competent authority. The integrated templates make any departure visible against the regular returns.
Starting Point Reconciliation Grid
This is the first diagnostic every CRO should demand from their stress-test PMO. Each line of the starting balance sheet must tie to three independent sources. Tolerances are explicit.
| Starting Balance Sheet Item | COREP Reference | FINREP Reference | Tolerance | Severity if Broken |
|---|---|---|---|---|
| Total Risk-Weighted Exposure Amount | C02.00 r010 | — | 0 bps | CRITICAL |
| CET1 Capital (post filters & deductions) | C01.00 r020 | F01.03 r350 (bridge) | < 5 bps of RWA | CRITICAL |
| Loans & Advances at Amortised Cost | C07 / C08 by ptf | F04.03 r080 | < 0.1% of total assets | HIGH |
| Non-Performing Exposures (NPE) | C08.02 NPL r by ptf | F18.00 r070 | 0 tolerance | CRITICAL |
| IFRS 9 Stage 2 Allocation | — | F04.04 + F12.01 | < 2% of stage 2 volume | HIGH |
| Off-Balance Sheet Commitments | C07.00 / C08 OBS | F09.02 | < 1% by product | MEDIUM |
| Deferred Tax Assets (DTA) | C01.00 r340/r370 | F10.00 / F11.00 | 0 tolerance | HIGH |
| Expected Loss / Provisions (IRB deduction) | C01.00 r390 | F12.01 | < 2% of provisions | HIGH |
| AT1 & T2 Instruments | C01.00 r530/r700 | F01.03 capital bridge | 0 tolerance | MEDIUM |
CET1 reconciliation to FINREP is where 80% of starting-point findings are raised by the JSTs. A clean bridge between the accounting balance sheet and the regulatory CET1 — line by line, reviewer-ready — is now table stakes, not optional supplementary documentation.
NPE & Stage Allocation: The Starting-Point Battleground
The single largest source of starting-point challenge by JSTs is the allocation of the performing portfolio across IFRS 9 stages and the reconciliation of the NPE perimeter. Under stress, misallocation at T-0 manifests as a 20–40 bps CET1 drift by year 3.
- NPE perimeter at T-0: The methodological note fixes the NPE perimeter at the reference date. No reclassification out of NPE during the exercise except under the cure rules of the methodological note, aligned with the NPE Guidelines.
- Stage 2 documentation: Banks must disclose the quantitative SICR triggers in force at T-0. Ex-post adjustments to SICR thresholds during the exercise are not permitted under the methodological note.
- Forborne exposures: Forbearance status must be traceable at T-0, with coverage consistent with supervisory expectations on curing periods.
- Model overlays: Pre-existing management overlays on ECL must be itemised at T-0. Overlays cannot be re-optimised during the projection horizon.
If the ECB asked you today to bridge your FINREP F18.00 NPE stock to your COREP C08.02 NPL perimeter exposure by exposure, with the stage allocation and ECL coverage as of T-0 — how many days would it take you to produce a signed-off reconciliation? Anything above 5 business days indicates a structural data gap that will surface under JST scrutiny.
The ANCHOR™ Framework: 7 Pillars of Starting-Point Integrity
Developed across three EBA stress tests and multiple SSM thematic reviews, the Ezelman ANCHOR™ framework is the practitioner's operating model for defending the starting point against supervisory challenge. It is designed to be reusable, auditable and boardroom-defensible.
Assemble
Compile the complete reference balance sheet: loans, trading book, OBS, participations, DTAs, prudential filters — at legal-entity and consolidated level.
Normalise
Harmonise segmentation between accounting, regulatory and management accounts. Eliminate definitional drift on exposure class, geography, and counterparty type.
Classify
Freeze the IFRS 9 stage allocation and NPE perimeter at T-0. Document the SICR thresholds, overlays, and curing rules in force on the reference date.
Harmonise
Reconcile the three views (IFRS × COREP × MI) line by line. Produce and sign off the tri-reconciliation bridge with explicit tolerance thresholds.
Own
Assign single accountability by line item (1.5LoD). One named owner per starting-point domain, one named challenger in Risk, one signatory at CFO/CRO level.
Review
Independent validation by 2LoD (Risk) and 3LoD (Internal Audit) before submission. Pre-emptive peer review vs. prior exercise starting points.
Defend
Build the supervisory defence pack before the JST asks. One-pagers per contentious item, challenger-ready, traceable to source systems.
Banks that anchor their starting point using ANCHOR™ materially reduce JST clarification requests on T-0, compress their data remediation cycles, and enter the stress test with an uncontested baseline — so every bps of depletion is attributable to the scenario, not to data quality issues. †
† Illustrative · based on the qualitative experience of ECB on-site and horizontal JST reviews observed across our mandate history. Not a measured dataset.
The Static Balance Sheet Assumption: Harder Than It Sounds
“Keep the balance sheet constant” is the most misunderstood instruction in the EBA exercise. The EBA methodological note is explicit about what constant means, what departures are allowed, and how run-off of matured exposures must be handled.
Maturity Replacement
Maturing exposures are replaced with new exposures of identical risk profile (same exposure class, PD band, LGD band, maturity bucket) — unless the bank has a formal run-off strategy.
No Net New Business
Total asset size is held constant. Banks cannot project growth-driven P&L, even where strategic plans include organic growth.
NPE Run-Off — Limited Scope
Departures from the static assumption are allowed only for NPE run-off and disposals committed and publicly disclosed before T-0 (e.g. binding sale agreements).
Regulatory-Driven Migrations
CRR3 standardised approach migrations (IRB → SA, permanent partial use) are recognised in the starting point and maintained through projection — not re-optimised under stress.
Dividend & AT1 Assumptions
Dividend distributions are set to zero in the adverse scenario. AT1 coupon behaviour follows contractual MDA & ADI rules, strictly applied on projected figures.
The most frequent supervisory finding we see is implicit business-plan bleed-through: banks unconsciously apply their internal MTP growth assumptions to margin or cost projections even as they “freeze” the balance sheet. The methodological note prohibits this, and with the templates inside regular reporting the JST can test static-assumption discipline directly in the projection engine outputs.
Starting-Point Sensitivity: CET1 Impact Matrix
A mis-anchored starting point is not cosmetic — it materially shifts the 3-year adverse CET1 depletion. Based on our observations across three EBA exercises, the following sensitivities are typical.
| Starting-Point Driver | Typical Error | CET1 Impact by Year 3 | RWA Impact | Severity |
|---|---|---|---|---|
| NPE stock mis-classification | ± 5% of NPE volume | ± 15–30 bps | Up to +€1bn | CRITICAL |
| Stage 2 under-allocation | 1–3 pp of performing book | −10 to −25 bps | Indirect via ECL | HIGH |
| DTA recognition gap | ± 10% of DTA balance | ± 5–15 bps | Direct CET1 deduction | HIGH |
| OBS commitment scope gap | 3–7% of OBS | − 5–10 bps | + RWA via CCF | MEDIUM |
| Expected Loss − Provisions mismatch | €50–200m | ± 5–15 bps | Direct CET1 deduction | HIGH |
| Prudential filter mis-application | Instrument-level | 5–20 bps | Direct CET1 deduction | MEDIUM |
In aggregate, a poorly controlled starting point costs banks 30–80 bps of avoidable CET1 depletion by year 3 — directly eroding headroom to MDA and potentially triggering Pillar 2 Guidance uplift. Discipline at T-0 is one of the highest-ROI interventions available to any stress-test programme.
90-Day Starting-Point Readiness Plan
Based on our delivery experience across three EBA stress tests, this is the minimum viable programme to arrive at the reference date with a defensible starting point.
Diagnostic & Gap Analysis
Run the ANCHOR™ diagnostic against the latest COREP/FINREP cycle. Identify tri-reconciliation gaps, NPE classification issues, stage 2 documentation weaknesses, and DTA recognition ambiguities.
Data Quality Remediation
Close the top-10 reconciliation gaps. Harmonise exposure segmentation between finance, risk, and MI. Establish a T-0 freeze protocol for ECL overlays and SICR thresholds.
Governance & Ownership
Appoint line-item owners. Set up the tri-reconciliation committee with CFO, CRO and Head of Finance Reporting. Define sign-off protocol and escalation thresholds.
Independent Validation
2LoD and 3LoD challenge of the starting point. Peer benchmarking against prior exercise T-0 and against public disclosures of peer G-SIBs.
Supervisory Defence Pack
One-pager per contentious item. Pre-empt likely JST clarification requests. CFO/CRO/Head of Risk signed dossier ready for submission.
5 Pitfalls That Will Produce a JST Finding
- Implicit business plan bleed-through: internal MTP assumptions contaminating the projection under a static-balance-sheet label.
- Stale ECL overlays: pre-T-0 management overlays never refreshed — the methodological note requires them to be itemised and documented on the reference date.
- Unexplained FINREP vs. COREP bridges: legacy reconciliation drift that finance has “lived with” for years is now fully visible once stress-test data sits inside the ITS reporting framework.
- DTA treatment inconsistency: different DTA recognition between accounting, tax and prudential — often discovered only during JST challenge.
- Missing NPE/Forbearance lineage: no traceable link between the NPE status, curing period, and ECL coverage at T-0.
The consultation closed on 10 July 2026. Industry responses pushed for (i) clearer tolerance thresholds on low-risk bridges, (ii) recognition of banks with active Guideline-compliant NPE run-off plans, and (iii) a harmonised definition of “material” overlay to avoid inconsistent supervisory interpretation across Joint Supervisory Teams. Watch the final ITS, expected after the consultation (Ezelman expects the final text around end-2026), for which of these the EBA concedes.
New Reporting Templates: The Hidden Test of Your Starting Point
Module 4 of the EBA reporting-simplification consultation (EBA/CP/2026/07) brings the stress-test templates into regular supervisory reporting. Most banks treat the starting-point work and the reporting work as separate files. They are not. The new templates demand exposure-level granularity, tri-reconciliation lineage, and dynamic management-action logic — and every one of those demands traces back to the starting-point data you build at T−0. The reporting consultation is the operational test of whether your starting-point architecture can hold supervisory weight.
| Reporting Area | Old Template | New Template | Starting-Point Impact | Severity |
|---|---|---|---|---|
| Credit Risk — Losses | Portfolio-level aggregation, 15 segments | Exposure-level granularity, 45+ segments | T−0 reference balance sheet must be reconstructable at counterparty level | CRITICAL |
| NII Projections | Top-down NII with 5 repricing buckets | Bottom-up NII with 12 repricing buckets + behavioural modelling | Starting-point loan-level cash flows become mandatory — aggregate balances no longer sufficient | CRITICAL |
| Sovereign Exposures | Country-level aggregation | Instrument-level with maturity + accounting classification | HTCS/HTC split at T−0 must reconcile to FINREP — accounting classification drives CET1 path | HIGH |
| Capital Ratios | Point-in-time CET1/T1/TC | Dynamic capital with management action constraints | Static-balance-sheet assumption must be evidenced from the reference date forward | HIGH |
| Liquidity & Funding | LCR/NSFR snapshot | LCR/NSFR + cash flow survival analysis under stress | Starting-point cash flow ladders now in scope — new data required at T−0 | HIGH |
Exposure-level granularity across credit risk and NII is the single largest infrastructure challenge produced by the methodological note read together with the reporting ITS. Most banks’ stress testing platforms were built on portfolio-aggregate starting-point data. Retrofitting exposure-level T−0 data pipelines is a 12–18-month undertaking that must be completed concurrently with the starting-point reconciliation work described above — you cannot sequence them.
What the Methodology and the Reporting ITS Together Actually Demand
Four structural challenges emerge when the EBA methodological note and the reporting ITS are read together. Banks that treat them as two separate workstreams will fail the first supervisory dry run.
Exposure-Level Starting-Point Architecture
Counterparty- and instrument-level T−0 balances become the new minimum. This requires a single source of truth between FINREP, COREP, and the stress-test submission layer — all three anchored to the reference date with documented lineage. Portfolio-aggregate starting points will no longer survive JST challenge.
Dynamic Capital + Static Balance Sheet Reconciliation
The reporting templates require dynamic capital paths under standardised management actions, while the methodological note binds the balance sheet to static-replacement logic. Banks must document exactly where the two meet and where management action is permitted — and the boundary must be defensible at the board level.
Tri-Reconciliation Under a 40% Shorter Submission Window
Tri-reconciliation (FINREP ↔ COREP ↔ stress-test) becomes testable by the supervisor once the three sit in one reporting framework, not an internal QA step. At the same time, the reporting consultation compresses the submission window by ~40%. Banks that compress the tri-reconciliation into the last two weeks will produce visibly weak submissions that attract top-down adjustments.
Three-Tier QA With Supervisory Benchmark Comparison
The reporting consultation introduces Tier 3 supervisory benchmark comparison as a new QA step. Banks must be able to explain any deviation from EBA/ECB benchmark model outputs — and those explanations trace back to the starting-point choices (NPE staging, overlay refresh, FVOCI classification). Weak starting-point governance is visible directly in the Tier 3 output.
Can your bank deliver exposure-level starting-point pipelines, recalibrate projection engines, implement three-tier QA, and run a dry run — all within 18 months, while the reporting ITS is finalised in parallel? For most banks the answer is no without starting infrastructure work now, ahead of final text.
Timeline: Consultation Response to Operational Go-Live
The merged programme — methodological-note starting point + reporting ITS — has one integrated timeline. Missing any milestone on either track delays the other.
Module 4 of the EBA reporting-simplification package; IFRS 18 FINREP component closed 10 May 2026.
Full programme delivery (starting-point reconciliation + new reporting templates) requires 15–25 FTE across risk methodology, data engineering, IT and programme management over 18 months. Total investment for a G‑SIB: €5–12m including technology, external support, and internal resource costs. Under-investment creates execution risk that materialises as supervisory top-down adjustments.
Primary documents cited in this analysis
- [1]
- [2]
- [3]
- [4]ECBECB SREP methodology — Pillar 2 Guidance and Pillar 2 Requirement formation (most recent edition) → source
- [5]EBAEBA consultation on the simplification of supervisory reporting, EBA/CP/2026/07 (10 April 2026; responses by 10 July 2026; Module 4: integration of stress-test data collections; proposed application from September 2027 reference dates) → source
Dates, paragraph numbers and document versions verified at publication. Where consultations are still open, we flag draft status in text. Corrections: research@ezelman.com.
This analysis underpins our stress-test calibration and ICAAP mandates.
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