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In forceInsurers: national Solvency II extensions (national)Last checked 11 November 2026

Interest rate risk reporting (IRI_IND)

A regulatory return listed by the National Bank of Belgium (NBB), Belgium.

A national extension to the Solvency II reporting so the NBB can follow insurers' interest rate risk: guaranteed rates of the life portfolio (excluding health and class 23), modified durations of assets and liabilities, and undiscounted cash flow projections of the assets covering technical provisions (yearly up to 40 years, then 41-50 and beyond). Source

Official title: Interest Rate Risk (IRI_IND); Reporting risque de taux

The facts

Who files
Insurance and reinsurance undertakings under Belgian law, except Article 275, 276 and 294 undertakings; the guaranteed-rate part applies only to life insurers. Source
How often
Annual, on figures at 31 December of the previous year. Source
Deadline
30 April (30 April 2026 for the reference date 31/12/2025, Annex 3 to NBB_2026_01). Source
Format
XBRL-XML, CSV, Web form. XBRL in OneGate domain INS with the NBB IRI taxonomy; undertakings with technical provisions under EUR 50 million may still use CSV or manual entry. Source
How it is filed
Filing routes recorded for the NBB: OneGate; NBB Supervision. See how firms file with the NBB.
Status
In force
Legal basis
Group
Insurers: national Solvency II extensions (national)

Templates (13)

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

  • Technical provisions by guaranteed interest rate and remaining term (T.01.00.a)
  • Weighted average guaranteed interest rate by remaining term (T.01.00.b)
  • Weighted remaining term by interest rate (T.01.00.c)
  • Durations, total portfolio (T.02.00)
  • Durations by segment (T.02.01)
  • Description of characteristics (T.02.02)
  • Total for the year (projection of undiscounted expected cash flows) - gross and reinsurance (T.03.00.a)
  • Total for the year (projection of undiscounted expected cash flows) - assets (T.03.00.b)
  • Total by segment (projection of undiscounted expected cash flows) - gross and reinsurance (T.03.01.a)
  • Total by segment (projection of undiscounted expected cash flows) (T.03.01.b)
  • Average yearly return of the total portfolio (T.04.00)
  • Average yearly return by segment (T.04.01)
  • Description of assumptions (T.04.02)

Tables of the NBB IRI taxonomy 1.0.1 (val package), names translated from the French labels. Source

Validation rules

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

How they are written: XBRL Formula 1.0 value assertions in the NBB IRI taxonomy package (VAL).

The INS page also links publication_iri_rules.xlsx, which could not be read (robots.txt).

The rules, on nbb.be

How they were counted

XBRL value assertions in the val folder of www-nbb-be_iri_101-val.zip (IRI 1.0.1); the rules were integrated in the taxonomy from reference period 31/12/2018 (INS page news of 31/03/2019).

Counts are in the NBB'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 NBB was found on the pages checked. Source

Official documents (9)

The NBB'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.

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 NBB's reuse terms. This describes what regulators publish. It is not legal or regulatory advice: always rely on the regulator's own text.

Source: National Bank of Belgium (https://www.nbb.be). Documents copied here are unchanged and are available free of charge on the NBB's website. The plain-English summaries are Line4's own; the NBB does not endorse this library.

Last checked 11 November 2026.