1 min readBlockingEIOPA taxonomy 2.10.0Updated 11 November 2026

Activity by country- location of underwriting and activity by country - location of risk: values must agree (S.04.04, S.04.05, EIOPA rule BV1863)

A blocking check on the activity by country- location of underwriting (S.04.04) and activity by country - location of risk (S.04.05) templates, in the annual solo (ARS) return.

It applies to 2.8.2 returns too, the release for the 2026 returns, and Line4 Check runs it there as well.

The rule in plain words

Premiums written reported in S.04.04 (Activity by country - location of underwriting) needs to equal S.04.05 is (Activity by country - location of risk)

The headline gives only the template and the kind of check, because the rule is too long to say in a headline. The plain words above say all of it.

This is a blocking check. A return that fails it is normally rejected, so fix it before you submit. It runs only when your filing indicators mark S.04.04 and S.04.05 as reported.

The cells it reads

Activity by country- location of underwriting: by underwriting entity (S.04.04.01.01)

Row

  • R0020Premiums written (gross)

Columns

  • C0010Business underwritten in the country of establishment
  • C0020Business underwritten through FPS in country different from the country of establishment

Activity by country- location of underwriting: by underwriting entity and by EEA country (host country for FPS) (S.04.04.01.02)

Row

  • R0020Premiums written (gross)

Column

  • C0030Business underwritten in the considered country through FPS

Activity by country - location of risk: total underwriting entity activity (S.04.05.01.01)

Row

  • R0020Premiums written (gross)

Column

  • C0010Total of business written by the underwriting entity

Activity by country - location of risk (S.04.05.01.02)

Row

  • R0020Premiums written (gross)

Column

  • C0020Total by country

Which returns it applies to

Line4 Check runs it on annual solo (ARS) return on EIOPA taxonomy 2.10.0. EIOPA applies it to annual solo (ARS) and annual ECB solo (AES) returns, as a blocking check.

EIOPA’s own words and formula

The plain words above are EIOPA’s own, word for word, from its list of validations.

Show the formulaShow

EIOPA's formula. Cells are written as {t: table, r: row, c: column}.

{t: S.04.04.01.01, r: R0020, c: C0010, z: Z0001} + {t: S.04.04.01.01, r: R0020, c: C0020, z: Z0001} = {t: S.04.05.01.01, r: R0020, c: C0010, z: Z0001}

Every Solvency II rule on S.04.04

Checks like this one, run at the point of submission, are the first step to real-time supervision. Line4 builds SupTech software for financial regulators that runs checks like these as each return arrives.