Line4

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

Referenced data entries should be greater than or equal to zero (OF08.01.01.01, Bank of England check boe_b0314_1_14)

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

Referenced data entries should be greater than or equal to zero

In Credit and counterparty credit risks and free deliveries: IRB approach to capital requirements (CR IRB 1) (OF08.01.01.01): every value in the cells it covers must be zero or more.

What to do if your return fails it

  1. 01Open the table below and find the cells the rule reads.
  2. 02Look for a value below zero in these cells, such as an amount entered as a negative number.
  3. 03It runs only when your filing indicators mark OF08.01.01 as reported.
  4. 04This 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

  • R000140%
  • R0010Total exposures
  • R0017Of which: Exposures to revolving loan commitments
  • R0020On-balance sheet items subject to credit risk
  • R0030Off-balance sheet items subject to credit risk
  • R003110%
  • R003220%
  • R003350%
  • R0034100%
  • R0035Own estimate
  • R0040Securities Financing Transactions netting sets
  • R0050Derivatives & Long Settlement Transactions netting sets
  • R0060From Contractual Cross Product netting sets
  • R0070Exposures assigned to obligor grades or pools: Total
  • R0175Purchased receivables
  • R0180Dilution risk: total purchased receivables
  • R0190Corporates: where a credit risk assessment by a nominated ECAI is not available
  • R0200of which: investment grade

Columns

  • C0010Internal rating scale - PD assigned to the obligor grade or pool (%)
  • C0150Guarantees
  • C0160Credit derivatives
  • C0170Other funded credit protection
  • C0171AIRB: Cash on deposit
  • C0172Life insurance policies
  • C0173AIRB: Instruments held by a third party
  • C0180Eligible financial collateral
  • C0190Real estate
  • C0200Other physical collateral
  • C0210Receivables
  • C0230Exposure weighted average lgd (%)
  • C0250Exposure-weighted average maturity value (days)
  • C0251Risk-weighted exposure amount pre-adjustments
  • C0252Adjustment to risk-weighted exposure amount due to post-model adjustments
  • C0253Adjustment to risk-weighted exposure amount due to mortgage risk weight floor
  • C0254Unrecognised exposure adjustments

Sheet

  • S0018Retail - Secured by commercial immovable property SME (AIRB 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} >= 0

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

scope({t: OF08.01.01.01, r:0001;0010;0017;0020;0030;0031;0032;0033;0034;0035;0040;0050;0060;0070;0175;0180;0190;0200,c:0010;0150;0160;0170;0171;0172;0173;0180;0190;0200;0210;0230;0250;0251;0252;0253;0254,z:0018, 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.