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2 min readBlockingBank of England taxonomy 2.2.0Updated 11 November 2026

Own funds and detailed information by tiers on own funds: a total must equal the sum of its parts (IR.23.01, IR.23.02, Bank of England rule IR_bv0552_02)

A blocking check on the own funds (IR.23.01) and detailed information by tiers on own funds (IR.23.02) templates, in the annual group (ARG) return.

Check your file for this ruleWhat to do if it fails

The rule in plain words

The "Total" value of "Initial fund members' contributions or the equivalent basic own fund item for mutual and mutual type undertakings" reported in Detailed information by tiers on own funds (IR.23.02.04.01) should be equal to the sum of "Initial fund members' contributions or the equivalent basic own fund item for mutual and mutual type undertakings/Paid in" and "Initial fund members' contributions or the equivalent basic own fund item for mutual and mutual type undertakings/Called up but not yet paid in"

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 tables 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  3. 03If they differ, a part is missing, a value sits in the wrong cell, or the total is out of date.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.23.02 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

Own funds (IR.23.01.04.01)

Row

  • R0040Initial funds, members' contributions or the equivalent basic own - fund item for mutual and mutual-type undertakings

Column

  • C0010Total

Detailed information by tiers on own funds: basic own funds (IR.23.02.04.01)

Rows

  • R0110Paid in
  • R0120Called up but not yet paid in

Column

  • C0010Total

A worked example

With simple numbers.

Illustrative values
Paid in, Total1,200
Called up but not yet paid in, Total800
Together2,000
What the rule then expects

Initial funds, members' contributions or the equivalent basic own - fund item for mutual and mutual-type undertakings, Total 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 group (ARG) return on Bank of England taxonomy 2.2.0. The Bank of England applies it to annual group (ARG) returns, as a blocking check.

The Bank’s own words and formula

In the Bank of England’s list of validations, word for word:

The "Total" value of "Initial fund members' contributions or the equivalent basic own fund item for mutual and mutual type undertakings" reported in IR.23.02.04.01 - Detailed information by tiers on own funds should be equal to the sum of "Initial fund members' contributions or the equivalent basic own fund item for mutual and mutual type undertakings/Paid in" and "Initial fund members' contributions or the equivalent basic own fund item for mutual and mutual type undertakings/Called up but not yet paid in".
Show the formulaShow

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

{t: IR.23.02.04.01, r: R0200, c: C0010, z: Z0001} = {t: IR.23.02.04.01, r: R0110, c: C0010, z: Z0001} + {t: IR.23.02.04.01, r: R0120, c: C0010, z: Z0001}

Every Solvency UK rule on IR.23.01

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.