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1 min readWarningEIOPA taxonomy 2.10.0Updated 11 November 2026

Internal model - credit risk details for financial instruments: a total must equal the sum of its parts (S.26.11, EIOPA rule BV1848)

A warning on the internal model - credit risk details for financial instruments template (S.26.11), in the annual solo (ARS), annual group (ARG) and annual branch (ARB) returns.

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

Check your file for this ruleWhat to do if it fails

The rule in plain words

The "mVaR 99.50%" value of "Diversified risk: credit risk" reported in S.26.11.01.04 Credit event risk for financial instruments - mVaR 99.50% should be equal to the sum of "Total undiversified credit risk" and "Diversification: credit 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.

What to do if your return fails it

  1. 01Open the table below and find the cells the rule reads.
  2. 02Add up the parts in your return and compare the result with the total.
  3. 03If they differ, a part is missing, a value sits in the wrong cell, or the total is out of date.
  4. 04EIOPA allows a small rounding difference, worked out from the decimals each value is reported with.
  5. 05It runs only when your filing indicators mark S.26.11 as reported.
  6. 06This is a warning. It does not stop the return on its own, but your supervisor may ask you to explain it.

The cells it reads

Internal model - credit risk details for financial instruments: credit event risk for financial instruments - mVaR 99.50% (S.26.11.01.04)

Rows

  • R0190Total undiversified credit risk
  • R0200Diversification: credit risk
  • R0210Diversified risk: credit risk

Column

  • C0110mVaR 99.50%

A worked example

With simple numbers.

Illustrative values
Total undiversified credit risk1,200
Diversification: credit risk800
Together2,000
What the rule then expects

Diversified risk: credit risk must then be 2,000.

2,000Passes
2,100Fails

A file that reports 2,000 passes. One that reports 2,100 fails, by 100.

The numbers are illustrative, reported to the unit, so the rounding tolerance does not change the result.

Which returns it applies to

Line4 Check runs it on annual solo (ARS), annual group (ARG) and annual branch (ARB) returns on EIOPA taxonomy 2.10.0. EIOPA applies it to annual ECB solo (AES), annual group (ARG), annual ECB branch (AEB), annual solo (ARS) and annual branch (ARB) returns, as a warning.

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.26.11.01.04, r: R0210, c: C0110, z: Z0001} = {t: S.26.11.01.04, r: R0190, c: C0110, z: Z0001} + {t: S.26.11.01.04, r: R0200, c: C0110, z: Z0001}

Every Solvency II rule on S.26.11

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.