Solvency II taxonomy 2027: what changes on 30 January

Which taxonomy, for which return

Two Solvency II taxonomy releases matter in 2027. Taxonomy 2.8.2, published on 15 October 2024, applies from the Q4 2024 returns up to and including the Q4 and annual 2026 returns. Taxonomy 2.10.0, published on 3 July 2026, applies from the Q1 2027 reference date (EIOPA).

So the returns for the last quarter of 2026 and for the 2026 year end are filed in 2027 but still use 2.8.2 (EIOPA Q&A 3504). The first return on 2.10.0 is the one for the first quarter of 2027.

The cut, in numbers

EIOPA measured the change against what insurers filed for 2023: 13,043 submissions holding 164,236 templates and an estimated 974 million data points, at solo level (final report, 30 March 2026).

Its proposals remove about 22% of those data points, net of the new templates they add; before the new natural catastrophe templates the cut is 23%. The 22% is data points, not templates. Quarterly templates fall by 26% and annual ones by 30%, and for small and non-complex undertakings by 36% and 44%.

The threshold for financial stability reporting rises from EUR 12 billion to EUR 20 billion, so fewer groups and undertakings file those returns.

What goes from the annual return

Taxonomy 2.10.0 removes 11 solo annual templates and 2 group annual ones (EIOPA release notes). Groups stop reporting the annual movements on own funds (S.23.03) and risk concentration by asset class and rating (S.37.03). For solo undertakings, the templates that go are:

What is new, and what changes how often

Two natural catastrophe templates join the annual solo return: catastrophe loss data (S.27.02) and catastrophe exposure and premium data (S.27.03). Small and non-complex undertakings and life insurers do not file them, and reinsurers file only the loss data. A template on the volatility adjustment, by country and currency (S.22.07), replaces S.22.06, with a version for public disclosure.

Some templates change frequency. The minimum capital requirement (S.28.01 and S.28.02) becomes annual only, and the look-through of investment funds (S.06.03) is reported in the second and fourth quarters only. In the first and third quarters, small and non-complex undertakings report only the content of the submission, basic information and own funds (S.01.01, S.01.02 and S.23.01).

The validation rules change too

Taxonomy 2.10.0 removes more than 400 of EIOPA’s validation rules (XBRL assertions) and adds more than 1,000. About three quarters of the new ones check that the probabilities reported in the solvency capital requirement templates (S.26) fit together (EIOPA release notes).

The format does not change. EIOPA says there are no significant changes in the structure of the XBRL taxonomy, and its filing rules still ask for one XBRL-XML instance with the .xbrl extension. What changes is which templates and rules apply, and you can tell from the file itself which release it was built for.

Test your returns before the deadline does

The quickest way to see what the change means for you is to run a real return through the 2.10.0 rules before the first quarter of 2027 closes, and to keep checking the 2026 returns against 2.8.2 while you do.

Line4 Check for Solvency II checks a return against the rules of the release its schemaRef names, 2.8.2 or 2.10.0, in your browser, without uploading it.

Who it applies to

Insurers and reinsurers across the EU file their QRTs with their national supervisor, which passes the data on to EIOPA. The amending directive, Directive (EU) 2025/2, applies from 30 January 2027 (EIOPA). In Iceland, Liechtenstein and Norway it was taken into the EEA Agreement in October 2026, but that decision is not yet in force (EEA-Lex).

UK insurers are not affected. They report under Solvency UK, on the Bank of England’s own insurance taxonomy, and the Bank has told firms not to implement EIOPA’s taxonomy 2.7 or any later release.

What is still to be confirmed

EIOPA sent its revised reporting standards to the European Commission on 30 March 2026, and taxonomy 2.10.0 follows that text; the Commission decides on their adoption. EIOPA’s report also describes a transitional provision so that the templates being deleted need not be filed in the annual 2026 return. Check with your supervisor before you rely on it, and for any national templates of its own.