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

Operational risk: part 4 - business indicator and subcomponents (OPR): a total must equal the sum of its parts (OF16.00.01.04, SC16.00.01.04, Bank of England check boe_b0898)

A warning on the operational risk: part 4 - business indicator and subcomponents (OPR) (OF16.00.01.04) and operational risk: part 4 - business indicator and subcomponents (OPR) (SC16.00.01.04) templates, in the own funds (PRA001) and own funds for SDDTs (PRA116) returns.

Line4 Check runs it on the own funds (PRA001) and own funds for SDDTs (PRA116) returns, proven on test files, check by check: the same outcome on all six test files of those returns.

The rule in plain words

The Financial Component value of the Business Indicator Component is the sum of the absolute value between the Average Amount of Net Profit (or Loss) on trading book and on the banking book

In Operational risk: part 4 - business indicator and subcomponents (OPR) (OF16.00.01.04): "Financial Component (FC)" in column "Component value" (row 0350, column 0050) must equal the size of "Net profit (loss) on trading book" in column "Average amount" (row 0360, column 0040) (ignoring its sign) plus the size of "Net profit (loss) on banking book" in column "Average amount" (row 0370, column 0040) (ignoring its sign).

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  3. 03If they differ, a part is missing, a value sits in the wrong cell, or the total is out of date.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 OF16.00.01.04 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

Operational risk: part 4 - business indicator and subcomponents (OPR) (OF16.00.01.04)

Rows

  • R0350Financial Component (FC)
  • R0360Net profit (loss) on trading book
  • R0370Net profit (loss) on banking book

Columns

  • C0040Average amount
  • C0050Component value

Operational risk: part 4 - business indicator and subcomponents (OPR) (SC16.00.01.04)

Rows

  • R0350Financial Component (FC)
  • R0360Net profit (loss) on trading book
  • R0370Net profit (loss) on banking book

Columns

  • C0040Average amount
  • C0050Component value

Which returns it applies to

Line4 Check runs it on the own funds (PRA001) and own funds for SDDTs (PRA116) returns on Bank of England banking taxonomy 4.1.1. The Bank of England applies it to own funds for SDDTs (PRA116) and 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: OF16.00.01.04, r: 0350, c: 0050} = abs({t: OF16.00.01.04, r: 0360, c: 0040}) + abs({t: OF16.00.01.04, r: 0370, c: 0040})

Every PRA banking rule on OF16.00.01.04

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.