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

Data entries stated should be greater than or equal to zero (OF08.02.01.01, Bank of England check boe_b0316)

A blocking check on the credit and counterparty credit risks and free deliveries: IRB approach to capital requirements: breakdown by obligor grades or pools (CR IRB 2) template (OF08.02.01.01), 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

Data entries stated should be greater than or equal to zero

In Credit and counterparty credit risks and free deliveries: IRB approach to capital requirements: breakdown by obligor grades or pools (CR IRB 2) (OF08.02.01.01): 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 OF08.02.01 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: breakdown by obligor grades or pools (CR IRB 2) (OF08.02.01.01)

Columns

  • C0010Internal rating scale - PD assigned to the obligor grade or pool (%)
  • C0020Original exposure pre-conversion factors
  • C0030Of which: large financial sector entities and unregulated financial entities
  • C0080Total inflows (+)
  • C0090Exposure after CRM substitution effects pre-conversion factors
  • C0100Of which: off balance sheet items
  • C010110%
  • C010220%
  • C010340%
  • C010450%
  • C0105100%
  • C0106Own Estimate
  • C0110Exposure value
  • C0120Of which: off balance sheet items
  • C0125Of which: defaulted
  • C0130Of which: arising from counterparty credit risk
  • C0140Of which: large financial sector entities and unregulated financial sector entities
  • 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 (%)
  • C0240Exposure-weighted average LGD (%) for large financial sector entities and unregulated financial entities
  • 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
  • C0260Risk-weighted exposure amount after adjustments
  • C0265Of which: defaulted
  • C0270Of which: large financial sector entities and unregulated sector financial sector entities
  • C0280Expected loss amount pre post-model adjustments
  • C0281Adjustment to expected loss amount due to post-model adjustments
  • C0282Expected loss amount after post-model adjustments

And 2 more.

Sheets

  • S0001Total (AIRB approach)
  • S0002Total (FIRB approach and slotting approach)
  • S0006Institutions (FIRB approach)
  • S0009Corporates - Specialised Lending (AIRB approach)
  • S0010Corporates - Specialised Lending (FIRB approach or slotting approach)
  • S0011Corporates - Other general corporates - non-SME (AIRB approach)
  • S0012Corporates - Other general corporates - non-SME (FIRB approach)
  • S0015Retail - Qualifying revolving (AIRB approach)
  • S0016Retail - Other SME (AIRB approach)
  • S0017Retail - Other non-SME (AIRB approach)
  • S0018Retail - Secured by commercial immovable property SME (AIRB approach)
  • S0019Retail - Secured by commercial immovable property non-SME (AIRB approach)
  • S0020Retail - Secured by residential immovable property - SME (AIRB approach)
  • S0021Retail - Secured by residential immovable property non-SME (AIRB approach)
  • S0022Corporates - Financial corporates and large corporates (FIRB approach)
  • S0023Corporates - Other general corporates - SME (AIRB approach)
  • S0024Corporates - Other general corporates - SME (FIRB 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: OF08.02.01.01} >= 0

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

scope({t: OF08.02.01.01, c:0103;0010;0020;0030;0080;0090;0100;0101;0102;0104;0105;0106;0110;0120;0125;0130;0140;0150;0160;0170;0171;0172;0173;0180;0190;0200;0210;0230;0240;0250;0251;0252;0253;0254;0260;0265;0270;0280;0281;0282;0300;0310,z:0001;0002;0006;0009;0010;0011;0012;0015;0016;0017;0018;0019;0020;0021;0022;0023;0024, f: banking, fv: banking_reporting})

Every PRA banking rule on OF08.02.01.01

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.