BSI and MIR reporting — the ECB statistical returns every euro-area MFI has to file

BSI and MIR are the two ECB statistical returns that catch a euro-area e-money institution the moment it is classified as a monetary financial institution — and most firms discover the classification from the ECB’s published list rather than from a letter. BSI is balance sheet items, governed by Regulation (EU) 2021/379 (ECB/2021/2). MIR is interest rate statistics, governed by Regulation (EU) No 1072/2013 (ECB/2013/34). Neither is prudential reporting, and both are filed to the national central bank on a calendar the NCB derives backwards from its own deadline to Frankfurt. This walks through who is in scope, what each return contains, where the derogations sit, and what the Integrated Reporting Framework changes at the end of the decade.

1. Who is a monetary financial institution — and why an EMI often is

The reporting population is not defined by licence type. Under Article 2(1) of Regulation (EU) 2021/379, a monetary financial institution (MFI) is an entity in one of two sectors: central banks, or “other MFIs”, which comprise deposit-taking corporations except central banks, and money market funds.

The operative definition is Article 2(3). Deposit-taking corporations except central banks means (a) credit institutions carrying on the business in Article 4(1)(1)(a) of Regulation (EU) No 575/2013; (b) other financial institutions whose principal activity is financial intermediation and whose business is to receive deposits or close substitutes for deposits and to grant loans or invest in securities on their own account; and (c) — the limb that matters here — electronic money institutions that are principally engaged in financial intermediation in the form of issuing electronic money.

So an authorised EMI whose principal activity is issuing e-money is a monetary financial institution for ECB statistical purposes, with no further test. A payment institution that does not issue e-money is not. That single line decides whether BSI applies at all, and it is the fact most licensing projects fail to carry from the authorisation file into the reporting build. Article 3(1) then fixes the actual reporting population: MFIs and non-MFI credit institutions resident in the euro area member states. Outside the euro area the ECB regulations do not bite directly, and the national central bank runs its own framework instead.

2. BSI and MIR side by side

Both take their definitions of “reporting agent” and “resident” from Regulation (EC) No 2533/98 on the collection of statistical information by the ECB. Otherwise they are independent, with different populations and different selection logic.

3. What BSI actually asks for

Article 5(1) sets out six deliverables for MFIs, all cross-referenced to tables in Annex I: end-month outstanding amounts (Table 1, Part 2); monthly revaluation adjustments as a minimum requirement (Table 1A, Part 4), plus the others in that table where the NCB requires them; monthly net loan transfers (Table 5a, Part 5); end-month outstanding amounts and monthly revaluation adjustments of transferred loans (Table 5b, Part 5); end-quarter outstanding amounts (Tables 2, 3 and 4, Part 3); and quarterly revaluation adjustments (Table 2A, Part 4). The NCB may also collect the quarterly items monthly where that helps its production process, so read the national instruction rather than the regulation alone.

The revaluation adjustments are what surprises teams building from an accounting extract. BSI is a monetary-statistics dataset, not a balance sheet: the ECB has to separate genuine flows from price and exchange-rate effects, so the return carries both stocks and the adjustments that reconcile them. Article 8 then requires reporting agents to follow Council Directive 86/635/EEC, report all financial assets and liabilities gross, report end-month principal outstanding amounts of deposits and loans excluding write-offs and write-downs, and not net deposits against loans or any other item.

Facts: a euro-area EMI classified as an MFI builds its first BSI submission from the monthly management accounts, netting intragroup balances and reporting loans net of provisions.

What the rule says: Article 8(2)(c) forbids netting deposit liabilities and loans against other assets or liabilities, and Article 8(3) allows loans net of loan loss provisions only where the NCB had already permitted that for all reporting agents before this regulation was adopted, under the equivalent provision of the repealed Regulation (EU) No 1071/2013.

What the practitioner does: rebuilds the extract from the general ledger on a gross basis, and puts the netting question to the NCB in writing before the first live submission — the answer is national and inherited, not something the firm can elect.

4. How the deadline you are given is derived

Neither regulation gives reporting agents a date. Article 7(1) of the BSI Regulation says NCBs determine the frequency and timeliness with which they receive information from reporting agents in order to meet their own deadlines, and inform reporting agents accordingly. Those deadlines are Article 7(2) — monthly statistics to the ECB by close of business on the 15th working day following the month — and Article 7(3), quarterly statistics by the 28th working day following the quarter. On the MIR side, Article 3(4) requires the NCB to send aggregated national monthly statistics to the ECB by close of business on the 19th working day after the reference month.

Working backwards predicts a national calendar before it is published: the NCB needs time to validate, chase and aggregate, so a reporting-agent deadline around the fifth to tenth working day is arithmetic, not preference. It also explains why statistical deadlines are unforgiving in a way prudential ones sometimes are not — the NCB has a fixed onward obligation and no slack to lend you.

5. Derogations, and why they are collective

BSI Article 9(1) lets NCBs grant derogations to small MFIs from the Article 5(1) requirements, subject to a ceiling set at national level: the combined contribution of all small MFIs granted a derogation must not exceed 5% of the outstanding amounts of total assets of the national MFI balance sheet (with separate, higher thresholds for money market funds). Even then the NCB must collect, as a minimum, the outstanding amount of total assets annually and the Annex III information needed to calculate the reserve base of credit institutions under Article 5 of Regulation (EU) 2021/378 (ECB/2021/1).

MIR Article 4(1) mirrors the logic where agents are selected by census: small MFIs may get a frequency derogation — quarterly instead of monthly — where their combined contribution to the national MFI balance sheet does not exceed 5%. Article 4(2) requires the NCB to check annually and grant or withdraw with effect from the start of each year; Article 4(3) lets a tail institution decline the derogation and report in full.

6. Why many e-money institutions fall outside MIR

MIR is narrower than its name suggests. Article 1(5) defines MFI interest rate statistics as rates applied by resident MFIs, other than central banks and MMFs, to euro-denominated deposits and loans vis-à-vis households and non-financial corporations resident in the euro area member states, plus the corresponding new business volumes including renegotiated loans. Article 1(7) defines the reference reporting population by the same test.

An e-money institution issuing e-money against safeguarded funds, paying no interest and granting no euro loans to households or corporates, performs neither of those activities and so does not enter the reference population — regardless of being an MFI for BSI purposes. Even inside the reference population, Article 2(1) leaves the actual reporting population to the NCB, which selects by census or by sample; Article 2(3) sets the quality bar for random samples at a maximum national random error of on average no more than 10 basis points at a 90% confidence interval.

Facts: a euro-area EMI appears on the ECB’s MFI list, receives BSI instructions from its NCB, and asks whether MIR follows automatically.

What the rule says: it does not. BSI scope follows MFI status under Article 3 of Regulation (EU) 2021/379; MIR scope follows the deposit-taking-or-lending test in Article 1(7) of Regulation (EU) No 1072/2013 and then an NCB selection decision under Article 2(1).

What the practitioner does: confirms the position with the NCB in writing and re-tests at each product launch — an interest-bearing euro balance for consumers, or euro lending to small businesses, moves the firm into the reference population and the NCB can select it at the next annual review.

7. Where it is actually filed

Both regulations delegate the mechanics. MIR Article 3(2) requires NCBs to define and implement the reporting arrangements in accordance with national requirements, and Article 2(5) requires each NCB to inform its resident reporting agents following national procedures. In practice: a national submission channel, national file formats and a national validation ruleset on top of a harmonised dataset — which is why a group operating in several euro-area states cannot run one statistical pipeline without a per-country adapter layer. The Netherlands files through the DNB reporting portal, with the returns covered in our Dutch statistical reporting note; Germany routes statistical submissions through the Bundesbank ExtraNet, where registration and a successful test submission precede the agreed start date for regular reporting.

Under BSI Article 13 the NCBs exercise the right to verify or compulsorily collect the information, in particular where a reporting agent fails the minimum standards for transmission, accuracy, compliance with concepts and revisions in Annex IV. MIR Article 3(5) refers sanctions to the ECB’s decision on non-compliance with statistical reporting requirements. Data quality here is a legal standard with a named enforcement route, not a service level.

8. What the Integrated Reporting Framework changes

The ECB is consolidating these datasets. The Integrated Reporting Framework (IReF) covers banks’ balance sheet and interest rate statistics, securities holdings statistics and granular credit data — BSI, MIR, SHS and AnaCredit — in a single standardised euro-area framework.

On 8 June 2026 the ECB published the main milestones. A public consultation on the draft IReF Regulation is planned for the second half of 2027. A one-year pilot phase starts in the second quarter of 2030, during which reporting agents are invited to test their ability to meet the requirements. First official IReF reporting begins in the second quarter of 2031, with an initial one-year parallel reporting phase in which existing statistical reporting within IReF scope continues alongside it.

Two planning consequences. BSI and MIR as they stand are the regime for the rest of the decade, so there is no reason to defer building them properly. And the parallel-run year makes the migration additive before it is substitutive: the target-state build has to coexist with the legacy pipeline rather than replace it on a cutover date. Firms already reporting AnaCredit will recognise the pattern.

9. FAQ

10. What to do, today

• Before the licence goes live: settle MFI classification in writing with the national central bank, not the supervisor. In most member states the two sit in the same institution but answer different questions, and the statistics side owns the list.
• Reporting build: source BSI from the general ledger on a gross basis and design the revaluation-adjustment logic at the start. Retro-fitting flow-versus-revaluation splits onto a stocks-only extract is the most common rebuild here.
• Calendar: derive your internal cut-off from the NCB’s 15th- and 28th-working-day obligations and hold a buffer. There is no extension mechanism, because the NCB has none either.
• Product governance: add a MIR test to the product-launch checklist — euro interest paid to consumers, or euro lending to households or non-financial corporations, moves the firm into the reference population at the next annual NCB review.
• Roadmap: mark the second half of 2027 IReF consultation as the point to influence the target state, and plan a parallel run rather than a cutover in 2030–2031.

Related: DNB statistical reporting — BSI and MIR · Bundesbank reporting via ExtraNet · AnaCredit for payment firms