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2 min readBlockingBank of England banking taxonomy 4.1.1Updated 11 November 2026

Credit and counterparty credit risks and free deliveries: IRB approach to capital requirements (CR IRB 1): a value must not be more than another (OF08.01.01.01, Bank of England check boe_b0370)

A blocking check on the credit and counterparty credit risks and free deliveries: IRB approach to capital requirements (CR IRB 1) template (OF08.01.01.01), in the own funds (PRA001) return.

Line4 Check runs it on the own funds (PRA001) return, proven on test files, check by check: the same outcome on all three test files of that return.

Check your file for this ruleWhat to do if it fails

The rule in plain words

original exposure to large financial sector entities and unregulated financial sector entities shall be equal to or smaller than the total ORIGINAL EXPOSURE PRE-CONVERSION FACTORS

In each of "Total exposures" (row 0010), "Exposures assigned to obligor grades or pools: Total" (row 0070), "Corporates: where a credit risk assessment by a nominated ECAI is not available" (row 0190) and "of which: investment grade" (row 0200) of Credit and counterparty credit risks and free deliveries: IRB approach to capital requirements (CR IRB 1) (OF08.01.01.01): "Of which: large financial sector entities and unregulated financial sector entities" (column 0030) must not be more than "Original exposure pre-conversion factors" (column 0020).

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. 02Compare the values in your return. If the first is bigger than it may be, one of them is wrong: check both before you change either.
  3. 03The Bank of England allows a small rounding difference, worked out from the decimals each value is reported with.
  4. 04It runs only when your filing indicators mark OF08.01.01 as reported.
  5. 05This is a blocking check. A return that fails it is normally rejected, so fix it before you submit.

The cells it reads

Credit and counterparty credit risks and free deliveries: IRB approach to capital requirements (CR IRB 1) (OF08.01.01.01)

Rows

  • R0010Total exposures
  • R0070Exposures assigned to obligor grades or pools: Total
  • R0190Corporates: where a credit risk assessment by a nominated ECAI is not available
  • R0200of which: investment grade

Columns

  • C0020Original exposure pre-conversion factors
  • C0030Of which: large financial sector entities and unregulated financial sector entities

Sheets

  • S0001Total (AIRB approach)
  • S0002Total (FIRB approach and slotting approach)
  • S0006Institutions (FIRB approach)
  • S0009Corporates - Specialised Lending (AIRB approach)
  • S0010Corporates - Specialised Lending (FIRB approach or slotting approach)
  • S0011Corporates - Other general corporates - non-SME (AIRB approach)
  • S0012Corporates - Other general corporates - non-SME (FIRB approach)
  • S0015Retail - Qualifying revolving (AIRB approach)
  • S0016Retail - Other SME (AIRB approach)
  • S0017Retail - Other non-SME (AIRB approach)
  • S0018Retail - Secured by commercial immovable property SME (AIRB approach)
  • S0019Retail - Secured by commercial immovable property non-SME (AIRB approach)
  • S0020Retail - Secured by residential immovable property - SME (AIRB approach)
  • S0021Retail - Secured by residential immovable property non-SME (AIRB approach)
  • S0022Corporates - Financial corporates and large corporates (FIRB approach)
  • S0023Corporates - Other general corporates - SME (AIRB approach)
  • S0024Corporates - Other general corporates - SME (FIRB approach)

Which returns it applies to

Line4 Check runs it on the own funds (PRA001) return on Bank of England banking taxonomy 4.1.1. The Bank of England applies it to own funds (PRA001) returns, as a blocking check.

The Bank’s own words and formula

The first paragraph of the plain words above is the Bank of England’s own, word for word, from its list of validations. The second spells out its formula, with each cell named from its templates.

Show the formulaShow

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

{t: OF08.01.01.01, c: 0030} <= {t: OF08.01.01.01, c: 0020}

Where it applies, in the Bank's words (its scope):

scope({t: OF08.01.01.01, r:0010;0070;0190;0200,z:0001;0002;0006;0009;0010;0011;0012;0015;0016;0017;0018;0019;0020;0021;0022;0023;0024, f: banking, fv: banking_reporting})

Every PRA banking rule on OF08.01.01.01

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.