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

"Total" must equal the sum of "Interest rate risk", "Foreign exchange risk", "Credit risk", "Equity risk" and "Commodity risk" (C34.04.01.01, Bank of England check v09827_m)

A warning on the counterparty credit risk: CCR exposures treated with the original exposure method (OEM) (CCR 4) template (C34.04.01.01), 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

In each of 5 columns (listed below) of Counterparty credit risk: CCR exposures treated with the original exposure method (OEM) (CCR 4) (C34.04.01.01): "Total" (row 0010) must equal the sum of "Interest rate risk" (row 0020), "Foreign exchange risk" (row 0030), "Credit risk" (row 0040), "Equity risk" (row 0050) and "Commodity risk" (row 0060).

What to do if your return fails it

  1. 01Open the table 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  3. 03If they differ, a part is missing, a value sits in the wrong cell, or the total is out of date.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 C34.04.01 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

Counterparty credit risk: CCR exposures treated with the original exposure method (OEM) (CCR 4) (C34.04.01.01)

Rows

  • R0010Total
  • R0020Interest rate risk
  • R0030Foreign exchange risk
  • R0040Credit risk
  • R0050Equity risk
  • R0060Commodity risk

Columns

  • C0010Number of transactions
  • C0020Notional amounts
  • C0030Current market value (CMV), positive
  • C0040Current market value (CMV), negative
  • C0050Potential future exposure (PFE)

A worked example

With simple numbers.

Illustrative values
Interest rate risk1,200
Foreign exchange risk800
Credit risk450
Equity risk300
Commodity risk150
Together2,900
What the rule then expects

Total must then be 2,900.

2,900Passes
3,000Fails

A file that reports 2,900 passes. One that reports 3,000 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 plain words above spell out the Bank’s formula, with each cell named from its templates. In the Bank of England’s list of validations, word for word:

v09827_m: [C34.04.01.01 (All columns)] {r0010} = {r0020} + {r0030} + {r0040} + {r0050} + {r0060}
Show the formulaShow

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

{t: C34.04.01.01, r: 0010} = {t: C34.04.01.01, r: 0020} + {t: C34.04.01.01, r: 0030} + {t: C34.04.01.01, r: 0040} + {t: C34.04.01.01, r: 0050} + {t: C34.04.01.01, r: 0060}

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

scope({t: C34.04.01.01, c:0010;0020;0030;0040;0050, f: banking, fv: banking_reporting})

Every PRA banking rule on C34.04.01.01

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.