1 min readBlockingBank of England taxonomy 2.2.0Updated 11 November 2026

Solvency capital requirement: non-life underwriting risk = sum of parts (IR.25.04, Bank of England rule IR_bv2043_01)

A blocking check on the solvency capital requirement template (IR.25.04), in the annual solo (ARS) return.

The rule in plain words

Non-life underwriting risk = sum of parts

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  3. 03If they differ, a part is missing, a value sits in the wrong cell, or the total is out of date.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. 04The Bank of England allows a small rounding difference, worked out from the decimals each value is reported with.
  5. 05It runs only when your filing indicators mark IR.25.04 as reported.
  6. 06This is a blocking check. A return that fails it is normally rejected, so fix it before you submit.

The cells it reads

Solvency capital requirement (IR.25.04.01.01)

Rows

  • R0330Non-life premium and reserve risk (ex catastrophe risk)
  • R0340Non-life catastrophe risk
  • R0350Lapse risk
  • R0355Other non-life underwriting risk
  • R0360Diversification within non-life underwriting risk
  • R0370Non-life underwriting risk

Column

  • C0010c

Which returns it applies to

Line4 Check runs it on annual solo (ARS) return on Bank of England taxonomy 2.2.0. The Bank of England applies it to annual solo (ARS) returns, as a blocking check.

The Bank’s own words and formula

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

Show the formulaShow

The Bank of England's formula. Cells are written as {t: table, r: row, c: column}.

{t: IR.25.04.01.01, r: R0370, c: C0010} = sum({t: IR.25.04.01.01, r: R0330; R0340; R0350; R0355; R0360, c: C0010})

Every Solvency UK rule on IR.25.04

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.