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1 min readWarningBank of England banking taxonomy 4.1.1Updated 11 November 2026

Total RWA should reflect the sum of RWA for modelled approaches and RWA on standardised approaches (OF02.01.01.01, OF02.00.01.01, OF02.01.01.02, Bank of England check boe_b0723_5)

A warning on the output floor - RWA for modelled approaches (OFL) (OF02.01.01.01), own funds requirements (CA2) (OF02.00.01.01) and output floor - RWA for Standardised approaches (OFL) (OF02.01.01.02) 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

Total RWA should reflect the sum of RWA for modelled approaches and RWA on standardised approaches

In Output floor - RWA for modelled approaches (OFL) (OF02.01.01.01): "Total" in column "Total RWA (U-TREA)" (row 0080, column 0030) in Output floor - Total RWA (OFL) (OF02.01.01.03) must equal the sum of "Total" in column "RWA for modelled approaches" (row 0080, column 0010) and "Total" in column "RWA for portfolios on standardised approaches" (row 0080, column 0020) in Output floor - RWA for Standardised approaches (OFL) (OF02.01.01.02).

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  3. 03If they differ, a part is missing, a value sits in the wrong cell, or the total is out of date.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 OF02.01.01 as reported.
  6. 06This is a warning. It does not stop the return on its own, but your supervisor may ask you to explain it.

The cells it reads

Own funds requirements (CA2) (OF02.00.01.01)

Row

  • R0010Total risk exposure amount

Column

  • C0010All approaches

Output floor - RWA for modelled approaches (OFL) (OF02.01.01.01)

Row

  • R0080Total

Column

  • C0010RWA for modelled approaches

Output floor - RWA for Standardised approaches (OFL) (OF02.01.01.02)

Row

  • R0080Total

Column

  • C0020RWA for portfolios on standardised approaches

A worked example

With simple numbers.

Illustrative values
Total, RWA for modelled approaches1,200
Total, RWA for portfolios on standardised approaches800
Together2,000
What the rule then expects

Total risk exposure amount, All approaches 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 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 warning.

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: OF02.01.01.03, r: 0080, c: 0030} = {t: OF02.01.01.01, r: 0080, c: 0010} + {t: OF02.01.01.02, r: 0080, c: 0020}

Every PRA banking rule on OF02.01.01.01

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.