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In forceInvestment firms: supervisory metrics and conduct returns (national)Last checked 11 November 2026

Monthly metrics return (MMR)

A regulatory return listed by the Central Bank of Ireland (CBI), Ireland.

A monthly snapshot of an investment firm: assets under management, financial data, liquidity, investment business services and clients, staff numbers, material issues and the ICAAP. UCITS management companies and AIFMs file it only for their individual portfolio management activity. Source

Official title: Monthly Metrics Return XBRL

The facts

Who files
All MiFID investment firms and IIA non-retail investment business firms (not retail intermediaries), and UCITS management companies and AIFMs approved to perform individual portfolio management, whether delegated or not. Source
How often
Monthly. Source
Deadline
Twenty working days from the previous month end. Source
Format
XBRL-XML. An XBRL file for entry point mmr of the Central Bank of Ireland Taxonomy (introduced as XBRL in taxonomy 2.1), uploaded on the Portal. Source
How it is filed
Filing routes recorded for the CBI: Central Bank of Ireland Portal (formerly the Online Reporting System, ONR); MiFIR transaction reporting Machine to Machine channel; Online Reporting System (ONR), now linked as 'Credit Union Auditor Reporting'; Email to the Central Bank. See how firms file with the CBI.
Status
In force
Group
Investment firms: supervisory metrics and conduct returns (national)

Templates (7)

The tables and forms inside the return. Plain name first, the CBI's code in brackets.

  • Assets under management at the reporting period end (MMR_01.00)
  • Financial data (MMR_02.00)
  • Liquidity (MMR_03.00)
  • Investment business services (MMR_04.00)
  • Number of staff at the reporting period end (MMR_05.00)
  • Material issues (MMR_06.00)
  • ICAAP (MMR_07.00)

Tables of entry point mmr (module version 2025-03-31) in Central Bank of Ireland Taxonomy 2.4. Source

Validation rules

2 rules, as counted from the CBI's published material. Software can run them exactly as published. Source

How they are written: XBRL Formula assertions in the Central Bank of Ireland Taxonomy package (val folder of each framework), plus an Excel list of every rule with its expression, severity and modules.

The rules, on centralbank.ie

How they were counted

Rule codes in sheet 'mmr' of 'CBI 2.4 Business rules.xlsx' with Include in XBRL = yes and Deactivated = no (2 of 2).

Counts are in the CBI's own unit, so they are not comparable with other regulators' counts.

Public data

No published data from this return was found. No data from this return published by the Central Bank was found on the pages checked. Source

Official documents (14)

The CBI's own files, with the size and SHA-256 fingerprint of each as downloaded on 11 November 2026, so anyone can tell whether a copy is the same version.

  • MiFID Requirements

    Guidance · HTML

    MiFID firm requirements, the link to the list of returns, IFR reporting, reporting guidance, and MiFIR transaction reporting arrangements. The Returns Guidance link .../mifid-firms/reporting-requirements redirects here.

  • Reporting Requirements for MiFID Investment Firms

    List of returns · XLSX · 32.5 KB

    Every return for MiFID firms: name, guidance, frequency and deadline, and whether it applies to Class 1 (transitional), Class 1 minus, Class 2 and Class 3 firms.

    SHA-256 474f650917fcshow in full474f650917fc94cf87a956d006abeea96fa5384303d2f86aca577ad2c4798653
  • Reporting Requirements for IIA Non Retail Firms

    List of returns · HTML

  • Reporting Requirements for IIA Non-Retail Investment Business Firms

    List of returns · XLSX · 23.9 KB

    SHA-256 7f2a70d5ccc4show in full7f2a70d5ccc48196333efe1bc3972e088ad7194874bb35d3cffdc149b5ed3267
  • Monthly Metrics Report - Guidance Note - August 2024

    Instructions · PDF · 729.1 KB · August 2024

    SHA-256 4292376337c4show in full4292376337c40eba83fcb086cbca080cd7bd032e033c761b0c0dc4b983f5c9d0
  • UCITS Management Companies Reporting Requirements

    List of returns · PDF · 142.4 KB

    SHA-256 efe35fb10d6cshow in fullefe35fb10d6c04b91e8e4c21db776b4a8ccceebce5366da014ce106063643493
  • AIFM Reporting Requirements

    List of returns · PDF · 151.6 KB

    SHA-256 acc49ccbd4c7show in fullacc49ccbd4c741b4c22e5fe97bafff9bd43b9eed84073656550de76cd8bb6935
  • C333002_20211130_MMR

    Sample · XBRL · 20.5 KB

    SHA-256 9ae881fc318cshow in full9ae881fc318c0600fa5fc57039d2ef5f9fd7bbea91cf9d4652f19b2ccbdc9772
  • Fund Service Providers Overview (Central Bank of Ireland Taxonomy releases)

    Taxonomy · HTML

    Publishes each version of the Central Bank of Ireland XBRL Taxonomy (2.0 to 2.4) with business rules and sample files, and says which returns each version added.

  • Central Bank of Ireland Taxonomy 2.4

    Taxonomy · ZIP · 14.5 MB

    Full package: entry points for FINREP+ (finrep_plus_ind, finrep_plus_con), PIMD, MMR, AUMD, ICAAP, capital requirements (cas, mcr, mcr_d, mcr_mgr, ofr, dao), asset disclosures (acd, qad), the annual outsourcing return (aor), related party lending (rplr), and payment and e-money institution returns (pia, eia), with annotated templates and a data dictionary.

    SHA-256 d681f2a9f461show in fulld681f2a9f461bfbfa35440b40876d235f8d3871e0824535857d6c306dbe7fdf0
  • CBI 2.4 Business rules

    Validation rules · XLSX · 169.7 KB

    One sheet per framework; each rule has its expression, Include in XBRL and Deactivated flags, and the modules it applies to.

    SHA-256 b68dafe2798fshow in fullb68dafe2798f23e8ed1a80fc5c928267753e6dbb62cd90f7d83a1a718e63993d
  • Deactivated Validation Rules 2.4

    Known issues · XLSX · 13.7 KB

    27 rule numbers currently deactivated, by framework.

    SHA-256 4b3d18cc9833show in full4b3d18cc983336ecb968fb6ee2f1645a0a193762db09330a9de6dc86b5464339
  • Sample Files 2.4

    Sample · ZIP · 15.3 KB

    SHA-256 9e08cd227e58show in full9e08cd227e58d4be4383a42b4f1f1812f623e706d1377783276e146e8d6952ab
  • Central Bank Taxonomy Xbrl File Upload Guidance

    Filing rules · PDF · 2.2 MB

    FINREP+ and PIMD tables, file naming (for example C123456_20210331_FINREP_P_AAA.xbrl), filing indicators, validation and the variance analysis on FP 01.01 to FP 02.00 (explanation needed for variances of 20% or more).

    SHA-256 3e89ed242180show in full3e89ed242180c53c94df8c12cb4ce43f93340abde33c3d7cc65eeaa3f0c39397

Sources

Every page and document this return's facts were read from.

Knowing exactly what is collected, in what format and under which rules is the first step to real-time supervision. Line4 builds SupTech software for financial regulators that runs checks like these as each return arrives.

Line4's text and records here are free to reuse under CC BY 4.0. Please credit: “Source: Line4 regulatory submissions library (CC BY 4.0), https://www.line4.ai”. The regulators' documents, forms, taxonomies, rules and data belong to them: see CBI's reuse terms. This describes what regulators publish. It is not legal or regulatory advice: always rely on the regulator's own text.

Contains Irish Public Sector Information from the Central Bank of Ireland (https://www.centralbank.ie), copyright Central Bank of Ireland, re-used under the Bank's licence for re-use of public sector information (https://www.centralbank.ie/fns/re-use-of-public-sector-information). This library summarises it in plain English and links the originals; the Central Bank of Ireland does not endorse this library.

Last checked 11 November 2026.