Line4

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

Own funds requirements (CA2): a conditional check (OF02.00.01.01, OF02.01.01.03, Bank of England check boe_b0718)

A blocking check on the own funds requirements (CA2) (OF02.00.01.01) and output floor - Total RWA (OFL) (OF02.01.01.03) templates, 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

If the ASA requirement for all desks (applicable only to IMA firms) is populated, the firm is an IMA firm. The Market Risk SA requirement for output floor purposes would then be equal to that amount. If the ASA requirement for all desks (applicable only to IMA firms) is blank, the firm must be either an SSA firm or an ASA firm. The SA requirement for output floor purposes would be equal to the sum of the firm's SSA requirement and the ASA requirement for ASA desks only, with one of the two expected to be blank depending on the firm's approach

In Own funds requirements (CA2) (OF02.00.01.01): if "Risk exposure amount for position, foreign exchange and commodities risks under advanced standardised approaches (ASA) - for all desks [This is only applicable for IMA firms]" in column "Standardised approaches only (Output Floor)" (row 5860, column 0020) is reported, "Total risk exposure amount for position, foreign exchange and commodities risks" in column "Standardised approaches only (Output Floor)" (row 0520, column 0020) must equal "Risk exposure amount for position, foreign exchange and commodities risks under advanced standardised approaches (ASA) - for all desks [This is only applicable for IMA firms]" in column "Standardised approaches only (Output Floor)" (row 5860, column 0020); otherwise "Total risk exposure amount for position, foreign exchange and commodities risks" in column "Standardised approaches only (Output Floor)" (row 0520, column 0020) must equal the sum of "Risk exposure amount for position, foreign exchange and commodities risks under simplified standardised approaches (SSA)" in column "All approaches" (row 0530, column 0010) and "Risk exposure amount for position, foreign exchange and commodities risks under advanced standardised approaches (ASA) - for ASA desks only" in column "All approaches" (row 0571, column 0010).

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. 02The check applies only when its first part holds in your return. When it does, the second part must hold too: fix the second part, or correct the first.
  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 OF02.00.01 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

Own funds requirements (CA2) (OF02.00.01.01)

Rows

  • R0520Total risk exposure amount for position, foreign exchange and commodities risks
  • R0530Risk exposure amount for position, foreign exchange and commodities risks under simplified standardised approaches (SSA)
  • R0571Risk exposure amount for position, foreign exchange and commodities risks under advanced standardised approaches (ASA) - for ASA desks only
  • R5860Risk exposure amount for position, foreign exchange and commodities risks under advanced standardised approaches (ASA) - for all desks [This is only applicable for IMA firms]

Columns

  • C0010All approaches
  • C0020Standardised approaches only (Output Floor)

Output floor - Total RWA (OFL) (OF02.01.01.03)

Row

  • R0050Market risk

Column

  • C0040Standardised total RWA (S-TREA)

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}.

If Not(IsNull({t: OF02.00.01.01, r: 5860, c: 0020})) then {t: OF02.00.01.01, r: 0520, c: 0020} = {t: OF02.00.01.01, r: 5860, c: 0020} else ({t: OF02.00.01.01, r: 0520, c: 0020} = {t: OF02.00.01.01, r: 0530, c: 0010} + {t: OF02.00.01.01, r: 0571, c: 0010})

Every PRA banking rule on OF02.00.01.01

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.