CSSF Reporting Calendar Q4 2026: Seven Filing Dates From 15 October
Wednesday 11 November 2026 is the main quarterly remittance date of the fourth quarter. On that day, by close of business, Luxembourg banks remit their COREP, FINREP, large exposures, leverage, NSFR, asset encumbrance and IRRBB modules for the 30 September 2026 reference date, and Class 2 investment firms remit their quarterly IFR templates. Around it, the CSSF reporting calendar for Q4 2026 adds three monthly liquidity dates for banks and a run of 20th-of-the-month national deadlines for investment firms, payment institutions and electronic money institutions.
The stakes are written into the CSSF’s own texts. Circular CSSF 14/593, as amended, states that the CSSF must receive reporting tables without validation errors, technical errors or other quality defects at the deadline dates, and it places responsibility for timeliness, accuracy and completeness on the institution’s management.
The CSSF’s document “Reporting requirements for credit institutions” (version 8.3, 17 November 2025) provides summary tables of reporting templates, frequencies and remittance dates by bank category. These tables are not exhaustive and predate Implementing Regulation (EU) 2025/2475 of 8 December 2025, which amended the operational-risk reporting provisions of Implementing Regulation (EU) 2024/3117. The applicable consolidated ITS therefore governs the September 2026 template obligations. One deadline also moves: 15 November 2026 falls on a Sunday, so October’s monthly liquidity returns fall due on Monday 16 November.
The scope here is prudential reporting to the CSSF by credit institutions, investment firms under the Investment Firm Regulation, payment institutions (PIs) and electronic money institutions (EMIs). Fund managers’ AIFMD and UCI reporting, statistical returns to the Banque centrale du Luxembourg and resolution reporting (which the CSSF covers in a separate resolution reporting handbook) run on their own calendars and are left out.
Related reading: CSSF Reporting Calendar Q3 2026
CSSF reporting calendar Q4 2026: the seven filing dates
Every date below comes from a primary text: Commission Implementing Regulation (EU) 2024/3117 and the CSSF credit institution document for banks, Commission Implementing Regulation (EU) 2021/2284 and the CSSF Reporting Handbook for Investment Firms for investment firms, and Circulars CSSF 11/511 and 11/522 for PIs and EMIs. Weekdays are calendar facts for 2026. In the calendar, monthly ALMM entries apply only to institutions required to report the relevant ALMM templates monthly. Small and non-complex institutions report C 66.01, C 67.00 and C 71.00 quarterly instead, with their Q3 2026 submission due on 11 November. Monthly LCR reporting continues separately.
| Date (2026) | Who files | What is due |
|---|---|---|
| Thursday 15 October | Credit institutions | Monthly LCR (C 72.00 to C 76.00) and monthly ALMM for 30 September |
| Tuesday 20 October | PIs and EMIs | Monthly balance sheet and third-party funds tables for September; quarterly capital adequacy and profit and loss tables for Q3, plus the EMI statement of authorised reinvestments (W 1.3) |
| Tuesday 20 October | Investment firms under IFR | National Table I for September; quarterly national tables for Q3 |
| Wednesday 11 November | Credit institutions; Class 2 investment firms | Quarterly EBA ITS modules (banks) and quarterly IFR templates (Class 2 firms) for 30 September |
| Monday 16 November | Credit institutions | Monthly LCR and ALMM for 31 October (15 November is a Sunday) |
| Friday 20 November | Investment firms; PIs and EMIs | Monthly national tables for October |
| Tuesday 15 December | Credit institutions | Monthly LCR and ALMM for 30 November |
| Sunday 20 December | Investment firms; PIs and EMIs | Monthly national tables for November (weekend point below) |
The last row needs a caveat. Article 3(2) of Implementing Regulation 2024/3117 moves an ITS remittance date that lands on a Saturday, Sunday or Luxembourg public holiday to the following working day, and that is the rule behind 16 November. The deadline tables in the investment firm handbook and in Circulars CSSF 11/511 and 11/522 state “20th” and print no equivalent weekend rule, so those documents do not settle whether 20 December rolls to Monday 21 December. A prudent working assumption is to plan for Friday 18 December and to treat any later date as something to confirm with the CSSF contact, since Circular CSSF 11/511 already asks PIs to inform the CSSF beforehand of any delay.
11 November: the quarterly ITS package for banks
The legal anchor is Article 3(1)(b) of Implementing Regulation 2024/3117, which sets quarterly remittance dates of 12 May, 11 August, 11 November and 11 February, with submission “by close of business”. The reporting duties themselves sit in Article 430 of Regulation (EU) No 575/2013 (the CRR), and Section 6 of the CSSF document reminds institutions that harmonised modules are due on the dates in Article 3 of the ITS. 11 November 2026 falls on a Wednesday and does not appear on Luxembourg’s statutory holiday list fixed by the law of 25 April 2019, so the date holds as printed.
For a bank reporting on an individual basis, the CSSF tables put the following modules on the 11 November date for the 30 September reference date. Banks supervised on a consolidated basis also file the consolidated modules in accounting version C, under a separate CSSF table.
| Module (CSSF domain) | Quarterly templates | Scope notes in the CSSF table |
|---|---|---|
| Own funds (SSOLV) | C 01.00 to C 05.00 and the other applicable quarterly COREP templates, including the amended operational-risk template C 16.01 (the additional C 16.02 and C 16.03 templates first apply from the 30 June 2026 reference date; their frequency is set in Annex I as amended by Implementing Regulation (EU) 2025/2475); C 16.04 is a consolidated-basis template under Article 7(c) of Implementing Regulation (EU) 2024/3117, so it stays out of the individual file: EU parent institutions report it quarterly, on a consolidated basis, for subsidiaries subject to the derogation under Article 314(3) CRR | C 14.00, C 17.00 and C 33.00 are semi-annual |
| Large exposures (SLAREX) | C 26.00 to C 29.00 | C 30.00 and C 31.00 removed from Q2 2021 |
| Leverage ratio (SLEVDA) | C 40.00, C 43.00, C 44.00, C 47.00 | C 48.00 for large banks only |
| Stable funding (SNSFR) | C 80.00, C 81.00 and C 84.00 for institutions using the standard NSFR methodology; C 82.00, C 83.00 and C 84.00 for small and non-complex institutions authorised by their competent authority to use the simplified NSFR methodology | Applies from the 30 June 2021 reference date |
| Asset encumbrance (SAE) | F 32.01 to F 32.04; F 35.00 only for institutions issuing the covered bonds specified in Article 52(4), first subparagraph, of Directive 2009/65/EC, in accordance with Article 19(2)(d) of Implementing Regulation (EU) 2024/3117 | F 33.00 quarterly for large institutions and, subject to the entry and exit criteria in Article 4, for institutions that are neither large nor small and non-complex where the asset-encumbrance level is equal to or above 15%, as specified in Article 19(2)(c) |
| Market risk (SFRTB) | C 90.00 (size of the business subject to market risk and of the trading book); C 91.00 (alternative standardised approach results) only for institutions that meet neither the Article 94(1) nor the Article 325a(1) CRR conditions | Implementing Regulation (EU) 2021/453, Articles 2 and 3; Article 430b(1) CRR, which Article 520a CRR keeps applying in its 8 July 2024 version until 1 January 2027 |
| IRRBB | J 01.00 plus a size-dependent set | Large: J 02.00, J 05.00, J 08.00; regular: J 03.00, J 06.00, J 09.00; SNCI: J 04.00, J 07.00, J 09.00 |
| FINREP individual (SFINRP) | F 01.00 to F 26.00 | Circular CSSF 14/593; FINREP version depends on the bank’s category |
Two further rows reach 11 November only conditionally. ALMM templates C 66.01, C 67.00 and C 71.00 move from monthly to quarterly when the conditions referenced in Article 18 of the ITS are met, in which case the Q3 data is due on this date. The G-SII module carries the CSSF’s own label “not applicable in Luxembourg”.
The narrow trap in a September submission is over-inclusion. The CSSF’s important notice quotes Article 23(1)(a) of the ITS: institutions “shall not include information in the data submission that is not required or not applicable”, and its first examples are exactly the ones that bite at this reference date. Information applicable only semi-annually or annually stays out of the March and September submissions, which on the CSSF tables means that, among others, C 14.00, C 17.00, C 33.00, FINREP F 30.00 to F 31.00 and asset encumbrance F 36.01 to F 36.02 are left for the December cycle. Information applicable only on a consolidated basis stays out of an individual file, and a bank on the standardised approach does not populate IRB templates. The same logic runs through Chapter 5 of the CSSF document, which asks banks to avoid generating zero values for data points they have no data for, subject to the ECB data quality checks that require an explicit zero in named cells.
Branches are lighter. For a Luxembourg branch of a bank headquartered in another EU Member State, the CSSF table lists only individual FINREP, the annual C 15.00 property-loss template and the national tables B 2.5 B, B 2.5 E and B 4.6, so its 11 November file is FINREP alone. A branch of a non-EU bank follows a table close to that of a Luxembourg-incorporated bank, in accounting version L, with differences that include IRRBB, where it files only an annual J 01.00, and asset encumbrance, where the CSSF table requires F 33.00, F 35.00 and F 36.01 to F 36.02 from third-country branches above the Article 19(2)(c) threshold and makes them voluntary below it.
Monthly LCR and ALMM: the 15th, and the Sunday that moves it
Article 3(1)(a) of Implementing Regulation 2024/3117 sets monthly remittance at the 15th calendar day after the reporting reference date, and Chapter 3 of the CSSF document fixes the monthly reference date as the last day of each month. The CSSF table applies that to the liquidity coverage templates C 72.00 to C 76.00 (domain SLCRDA) and to the additional liquidity monitoring metrics: C 66.01, C 67.00 and C 71.00 monthly unless the quarterly route applies, C 68.00 and C 69.00 monthly for all banks except small and non-complex institutions, and C 70.00 monthly for large institutions only.
That gives four dates across the quarter and its edge:
- 30 September data: Thursday 15 October 2026.
- 31 October data: Monday 16 November 2026, because 15 November is a Sunday and Article 3(2) moves the remittance to the following working day.
- 30 November data: Tuesday 15 December 2026.
- 31 December data: Friday 15 January 2027.
The CSSF table still prints a 30th-calendar-day remittance in the LCR row. That line is a derogation for the months September 2016 to February 2017 and has no bearing on 2026 data, so a calendar that still carries a 30-day monthly cycle for LCR, or applies one to ALMM, is working from a derogation that expired in early 2017.
Consolidated liquidity reporting changed in 2025. From the Q1 2025 reference date the CSSF stopped asking subsidiaries of EU groups for systematic sub-consolidated ALMM, LCR and NSFR reporting, with an exception for liquidity sub-groups under Article 8 CRR. The CSSF keeps the option, based on Article 11(6) CRR, to request the data on a discretionary and temporary basis where the group’s risk profile or structure justifies it, and says it would contact the banks concerned bilaterally.
For the detail behind each liquidity template, see our LCR, NSFR and ALMM liquidity reporting guide.
Investment firms: IFR templates on 11 November, national tables on the 20th
The CSSF Reporting Handbook for Investment Firms (version of 31 March 2026) states the point that shapes this quarter in one line: remittance dates for the IFR reporting differ from those for the national reporting. Investment firms under the IFR, meaning Class 2 and Class 3 firms incorporated in Luxembourg, their branches and the Luxembourg branches of third-country investment firms, run two calendars at once.
The European calendar comes from Implementing Regulation 2021/2284. Article 2 sets quarterly remittance dates of 12 May, 11 August, 11 November and 11 February and an annual date of 11 February. For a Class 2 firm the handbook lists the quarterly IFR set as own funds (I 01.00 to I 04.00), level of activity thresholds (I 05.00), K-factors (I 06.01 to I 06.13, supplemented where applicable by C 18.00 to C 24.00 for firms calculating K-NPR under Article 21(1) IFR, C 34.02 for firms using the derogation in Article 25(4) IFR (excluding output-floor information), and C 25.01 for firms using the derogation in Article 25(5), second subparagraph, IFR), concentration risk (I 07.00 to I 08.06) and liquidity (I 09.00), with Q3 data due on 11 November. A Class 3 firm reports its IFR templates annually, so nothing European falls due for it in this quarter; its next IFR date is 11 February 2027.
IFR reporting may be submitted through the CSSF’s “Investment firms reporting” module on eDesk or by structured-file submission using the S3 protocol. Both authorised routes are described in section 5.2.1 of the CSSF Reporting Handbook for Investment Firms, version 31 March 2026.
For Luxembourg-incorporated Class 2 and Class 3 investment firms and the relevant Luxembourg branches of third-country investment firms, the national reporting calendar comes from Circular CSSF 05/187 and, for staff numbers, Circular IML 96/124. It includes monthly Table I (financial situation) and quarterly tables II.1 to II.22, III.1 (off-balance sheet commitments), III.2 (profit and loss) and S 2.9 (staff numbers), generally due on the 20th calendar day after the reporting reference date. For firms subject to these requirements, September’s Table I and the Q3 quarterly tables fell due on Tuesday 20 October 2026, three weeks before the IFR templates for the same reference date.
Luxembourg branches of investment firms headquartered in another EU Member State follow different national reporting requirements under Circular CSSF 07/325, as amended: according to sections 3.1.2.4 and 3.1.3.4 of the Reporting Handbook, Tables I, III.1 and III.2 are semi-annual and due on the 30th calendar day after the reference date, while S 2.9 remains quarterly and due on the 20th. The national filing dates must therefore be applied according to the firm’s category. A firm that sets one internal cut-off for 11 November and runs both sets against it misses the national tables. Frequencies differ for some categories in the handbook, so the table for the firm’s own category governs.
Two scope points sit at the edges. Luxembourg branches of investment firms headquartered in another EU Member State are outside the IFR reporting but remain subject to some of the national reporting areas. For firms that apply the CRR under Article 1(2) or 1(5) IFR, the handbook carries no instructions yet, because the CSSF had not identified any such firm; Class 1 firms treated as credit institutions follow the credit institution document. Framework 4.2 applies to Class 2 and Class 3 firms from the March 2026 reference date, according to the handbook’s version table.
Payment and e-money institutions: the 20th, through the current channel until March 2027
PI and EMI prudential reporting rests on two circulars from 2011, both still listed on the CSSF’s legal reporting page for PIs and EMIs. Circular CSSF 11/511 requires payment institutions to file the balance sheet (Z 1.1) and the identification of third-party funds held (Z 1.2) monthly by the 20th of the following month, and capital adequacy (Z 1.4) and the profit and loss account (Z 2.1) quarterly by the 20th of the month after the end of the quarter. Circular CSSF 11/522 sets the same rhythm for EMIs across W 1.1, W 1.2 (monthly), W 1.3 authorised reinvestments, W 1.4 and W 2.1 (quarterly), and adds W 4.5, the analysis of shareholdings, due yearly by the 20th of the month after the calendar year ends. Both circulars require a copy of the relevant tables to go to the Banque centrale du Luxembourg.
For Q4 2026 that means 20 October for September’s monthly tables and the Q3 quarterly tables, 20 November for October, and 20 December for November, the Sunday discussed above. Institutions with branches abroad file most tables in versions L, S and N, with capital adequacy in version N only; those without branches file version L.
The channel stays as it is for every one of these filings. The CSSF announced on 10 September 2026 that PI, EMI and MiCAR-authorised CASP reporting will move from Excel templates to an eDesk module. The module opens for testing from 1 January to 31 March 2027, and submissions made in that window count as test submissions only. Reports falling due on or before 31 March 2027 go through the current channel, and eDesk becomes the sole official channel for any report with a deadline on or after 1 April 2027, even where the reporting period ended earlier.
The CSSF describes the new regime as quarterly financial and human-resources reporting, monthly reporting kept only for funds segregation, and an annual section on shareholders, branches, agents and distributors, and it says a new circular will replace Circulars 11/511 and 11/522. The 2011 circulars remain the published texts until the replacement appears. The migration is covered in detail in CSSF prudential reporting for PIs, EMIs and CASPs through eDesk.
Which EBA framework the 30 September data uses
Chapter 5 of the CSSF credit institution document sets a simple rule: each report uses the taxonomy version that applies to its reporting reference date, and the same rule binds a later resubmission. The EBA’s reporting frameworks page lists framework 4.2 (released in Q4 2025) as module-specific from 12/2025 reference dates, covering changes to resolution planning and MREL decisions, additional reporting on the operational risk own funds requirement, market risk benchmarking, instant payments reporting, FINREP data points and a DPM 2.0 and glossary update for all modules except DORA, according to the EBA’s 25 November 2025 release on the final 4.2 package. The CSSF’s own overview lists version 4.2 as an XBRL-CSV release for all modules.
The next two releases start no earlier than December 2026 reference dates. Framework 4.3, released in Q3 2026, includes the technical implementation of third-country branch reporting under the CRD, with a first reference date of 31 March 2027. Its AMLA risk-assessment components are preparatory: the EBA expressly states that they are intended to support preparation for the 2027 exercise and must not be used for submissions to national competent authorities or to the EBA/AMLA.
Framework 4.4 phase 1, whose final technical package the EBA published on 12 October 2026, has different first reference dates by module. Resolution and MREL technical corrections, AMLA eligibility reporting for entities in scope and certain Pillar 3 changes have December 2026 reference dates, with separate later dates for some disclosures.
The IFRS 18-aligned FINREP module has an expected first reference date of March 2027 for early use. The EBA’s Opinion of 8 July 2026 advises competent authorities to allow institutions to use IFRS 18-aligned FINREP templates voluntarily during the transition, while mandatory application under the amended FINREP ITS is currently expected from the end of September 2027, subject to adoption. Phase 2 includes further changes expected from September 2027. For the 30 September 2026 reference date, then, the operative version is 4.2, and the 4.3 and 4.4 work belongs to year-end preparation. The EBA reporting framework 4.4 final technical package article sets out the phase 1 content.
Validation rules move faster than frameworks. The EBA publishes small validation rules packages every quarter, and the CSSF applies them on its own dates, published in its file of deactivated validation rules and EBA small validation packages. Institutions should check the package applicable to their reporting instance and the CSSF’s effective date before the 11 November submission, and our guide to the CSSF COFREP validation rules file explains how to read it.
Warnings, EGDQ checks and the day after the deadline
An on-time file can still draw a reminder. Section 6 of the CSSF document sets the historic process for modules not yet collected through the eDesk procedure or the S3 API: on the day after the deadline, a first reminder letter goes by email to the institution’s reporting contacts if the module is missing, in error or still contains warnings, and a second letter goes to management at least two days later if nothing has been sent or corrected. Modules already collected through eDesk follow the reminder notifications described in the eDesk user guide for XBRL reports.
Warnings carry weight on their own. Section 5 of the same document treats validation rules with severity “Warning” as equally binding with “Error” rules: reporters are expected to analyse triggered warnings, revise data where needed and explain the rest, through eDesk for migrated modules. CSSF plausibility checks (the v_cssf rules) generate automatic rejection messages, and the BCL/CSSF liquidity quality checks (QC_AMML and QC_LCRDA) apply to credit institutions and Class 1 investment firms alike.
The ECB’s Expert Group on Data Quality checks split the population. For significant institutions, an EGDQ check failing with error severity always requires a resubmission, and a failing warning requires either a resubmission once the bank acknowledges the mistake or an explanation where resubmission is impossible. For less significant institutions, the CSSF may request a resubmission where it deems an error material. Whatever triggers it, a resubmission is a full report: the CSSF accepts no partial files, and each new instance replaces all earlier sendings of the same report.
The consequences are stated in Circular CSSF 14/593 itself: management must ensure compliance with transmission deadlines and with the accuracy, quality and completeness of the data, and the circular places any offence in this respect within the administrative penalties regime of Article 67(1)(e) of Directive 2013/36/EU.
What the 31 December 2026 reference date sets in motion
The quarter closes on the reference date that drives the heaviest filing window of the year. The dates below fall in the first quarter of 2027, but the data, the framework changes and the year-end audit work behind them all start in December.
| Date (2027) | Filing | Who |
|---|---|---|
| Friday 15 January | Monthly LCR and ALMM for 31 December | Credit institutions |
| Wednesday 20 January | B 4.6 persons responsible (CSSF instructions: by 20 January); B 4.5 shareholdings (20th calendar day after the reference date) | Credit institutions |
| Wednesday 20 January | W 4.5 analysis of shareholdings | EMIs |
| Thursday 11 February | Q4 quarterly, H2 semi-annual and annual ITS modules (including C 15.00); B 2.4 (annual, eDesk or API); B 2.5 B and B 2.5 E | Credit institutions |
| Thursday 11 February | Q4 IFR templates (Class 2); annual IFR templates (Class 3) | Investment firms |
| Monday 15 February | J 01.00 IRRBB, annual | Branches of non-EU banks |
| Monday 15 March | Funding plans under EBA/GL/2019/05 | Banks notified by CSSF letter only |
The B 4.5 date is a calculation: the CSSF table sets the 20th calendar day after the reporting reference date, and Chapter 3 of the CSSF document fixes annual reference dates at 31 December. B 4.5 and B 4.6 go through eDesk as a webform or JSON file, B 2.4 moved to eDesk or API from 1 February 2026 starting with the Q4 2025 reference date, and B 2.5 still travels through the external channels in XBRL. FINREP also needs a final version: the audited year-end figures in version D, submitted with the year-end publication documents and at the latest two weeks before the annual general meeting. For branches of EU banks that final version is optional unless the figures changed materially from the preliminary version.
Frequently Asked Questions
Our head office is in another Member State, and one of these dates is a public holiday there. Does the Luxembourg deadline move?
Article 3(2) of Implementing Regulation 2024/3117 refers to a public holiday “in the Member State of the competent authority to which the report is to be provided”. For reports to the CSSF that is Luxembourg’s statutory list, so a holiday at the parent’s seat leaves the CSSF date unchanged. Filings the group makes to its home supervisor follow that supervisor’s calendar.
We are a small and non-complex institution reporting ALMM quarterly. Which date covers C 66.01, C 67.00 and C 71.00 for Q3?
Where the quarterly route applies, the CSSF table points these templates to the quarterly dates, so Q3 data goes on 11 November with the rest of the ITS package. C 68.00 and C 69.00 are not required from small and non-complex institutions, and C 70.00 is for large institutions only, so no ALMM template falls on the monthly dates for such a bank. Its LCR templates C 72.00 to C 76.00 stay monthly.
Does a test file sent before 11 November count as filed?
Only a production file counts. Circular CSSF 14/593 makes the test environment optional and states that, on the closing date, the institution must have sent at least one production file (code N or D) of each reporting table. Files flagged as test versions, T or X under the CSSF naming convention for external channels, or files sent to the eDesk pre-production environment, do not meet that requirement.
We correct our 30 June 2026 COREP in January 2027, after December data has moved to new modules. Which taxonomy do we use?
The one that applied to 30 June 2026. The CSSF document applies the reference-date rule expressly to resubmissions, with the example of a December 2015 report resubmitted in November 2016 that still had to use the December 2015 taxonomy.
Our bank’s financial year ends on 31 March. When are B 2.5 B and B 2.5 E due?
The figures follow the accounting year-end, reported as period yyyy-03 for a March close, but the submission window is fixed: from 1 January at the earliest to 11 February at the latest of the following year, irrespective of the closing date. The CSSF asks for final code N, since the figures may be general-ledger based and need not be audited; version D is obsolete for these templates.
Our investment firm closes its books on 31 March. Does 11 November still apply to the IFR templates?
Implementing Regulation 2021/2284 allows firms with a non-December accounting close to adjust reference dates and keep the same remittance period from the adjusted date. The CSSF handbook routes that adjustment through a formal request to the firm’s regular CSSF contact, with ifd@cssf.lu in copy. A Class 3 firm that obtains an adjusted date still files all IFR templates in preliminary version as at 31 December, in addition to the preliminary and final versions at its actual closing date.
Related Articles
- CSSF Reporting Calendar Q3 2026: the July to September 2026 dates, including the 15 August Saturday that moved July’s liquidity returns.
- COREP Reporting Explained: an overview of the COREP templates that make up most of the 11 November package.
- Liquidity Reporting: LCR, NSFR and ALMM: what each liquidity template measures and how the monthly and quarterly cycles fit together.
- EBA Reporting Framework 4.4 Final Technical Package: the phase 1 modules, with first reference dates from December 2026 (March 2027 for the IFRS 18-aligned FINREP module).
- CSSF Prudential Reporting for PIs, EMIs and CASPs via eDesk: the 2027 move from Excel templates to the eDesk module.
- CSSF Table B 4.6: Persons Responsible for Certain Functions: what the annual B 4.6 table captures ahead of its 20 January deadline.
Key Takeaways
- Freeze 30 September COREP, FINREP, LE, LR, NSFR, AE, FRTB and IRRBB data early enough to clear EBA, CSSF and EGDQ checks before close of business on 11 November.
- Move October’s LCR and ALMM run to Monday 16 November in the internal calendar.
- Run the Circular CSSF 05/187 national tables on their own 20th-day cut-off, separate from the 11 November IFR run: 20 October has passed and the next dates are 20 November and 20 December; branches of EU investment firms follow the semi-annual Circular CSSF 07/325 dates instead.
- Strip semi-annual and annual templates out of the September instance.
- Tag 30 September data to framework 4.2 and start the 4.3 and 4.4 mapping for 31 December.
- Ask the CSSF before relying on Monday 21 December for national tables due on Sunday 20 December.
- Keep PI and EMI Q4 filings in the existing Excel template format and submit them through the currently authorised CSSF transmission arrangements; plan eDesk testing from January to March 2027.
Sources and References
- CSSF, Reporting requirements for credit institutions, final version 8.3, 17 November 2025: CSSF (PDF)
- Commission Implementing Regulation (EU) 2024/3117 of 29 November 2024 on supervisory reporting of institutions (Articles 3, 4, 7, 17, 18, 19 and 23): EUR-Lex
- Commission Implementing Regulation (EU) 2025/2475 of 8 December 2025 amending Implementing Regulation (EU) 2024/3117 as regards operational risk supervisory reporting of institutions: EUR-Lex
- EBA, guidance to banks on enhanced reporting requirements for operational risk ahead of the new June 2026 reference date, 17 December 2025: EBA
- Commission Implementing Regulation (EU) 2025/2159 of 27 October 2025 amending Implementing Regulation (EU) 2021/2284 on supervisory reporting and disclosures of investment firms: EUR-Lex
- Regulation (EU) 2019/2033 (Investment Firms Regulation), including Articles 1, 21 and 25: EUR-Lex
- Directive 2009/65/EC (UCITS Directive), Article 52(4): EUR-Lex
- Circulars CSSF 05/187 and CSSF 07/325 and Circular IML 96/124, national reporting tables as listed in sections 2.3, 3.1.2.4 and 3.1.3.4 of the CSSF Reporting Handbook for Investment Firms, version 31 March 2026 (linked below)
- EBA, Reporting framework 4.3: EBA
- EBA, Reporting framework 4.4: EBA
- EBA, Opinion on the implementation of IFRS 18 in supervisory financial reporting, 8 July 2026: EBA
- Regulation (EU) No 575/2013 (Capital Requirements Regulation), including Articles 8, 11(6), 94, 325a, 415, 430, 430b and 520a: EUR-Lex
- Commission Implementing Regulation (EU) 2021/453 of 15 March 2021 on the specific reporting requirements for market risk (Articles 1 to 3): EUR-Lex
- EBA, final technical package for the 4.2 reporting framework, 25 November 2025: EBA
- Commission Implementing Regulation (EU) 2021/2284 of 10 December 2021 on supervisory reporting and disclosures of investment firms (Articles 1 and 2): EUR-Lex
- CSSF, Reporting Handbook for Investment Firms, version 31 March 2026: CSSF (PDF)
- Circular CSSF 14/593 as amended, supervisory reporting requirements applicable to credit institutions: CSSF (PDF)
- Circular CSSF 11/511, periodic reporting scheme for payment institutions, 23 May 2011: CSSF (PDF)
- Circular CSSF 11/522, periodic reporting scheme for electronic money institutions, 24 October 2011: CSSF (PDF)
- CSSF, Legal reporting for PIs/EMIs: CSSF
- CSSF, Evolution of prudential reporting for payment institutions, electronic money institutions and crypto-asset service providers, 10 September 2026: CSSF
- CSSF, Tableau B 4.6 instructions, version December 2025: CSSF (PDF)
- CSSF, Deactivated validation rules and EBA small validation packages (COFREP): CSSF (XLSX)
- EBA, Reporting frameworks overview: EBA
- EBA, final technical package for the 4.3 reporting framework, 9 July 2026: EBA
- EBA, final technical package for release 4.4 of the reporting and Pillar 3 disclosure framework, 12 October 2026: EBA
- Government of Luxembourg, Public holidays in Luxembourg (law of 25 April 2019): luxembourg.public.lu
Before 11 November: what to lock down
Of the seven dates, 11 November carries the most templates and the most points of failure, from a semi-annual template left in a September file to a validation package applied on the wrong date. The two October dates set the pattern for the rest of the quarter, with bank liquidity on the 15th and the national tables of investment firms, PIs and EMIs on the 20th. What remains is the quarterly package, validated against the current CSSF small-package file and submitted in production by close of business on Wednesday 11 November, followed by October liquidity data on Monday 16 November.
Disclaimer: The information on RegReportingDesk.com is for educational and informational purposes only. It does not constitute legal, regulatory, tax, or compliance advice. Always consult your compliance officer, legal counsel, or the relevant supervisory authority for guidance specific to your institution.
