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

"Subject to risk weights" must equal the sum of "SEC-IRBA", "SEC-SA", "SEC-ERBA", "Internal assessment approach" and "OTHER (RW=1250%)" (C13.01.01.01, Bank of England check v7326_m)

A warning on the credit risk: securitisations (CR SEC) template (C13.01.01.01), 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

In each of 65 rows (listed below) of Credit risk: securitisations (CR SEC) (C13.01.01.01): "Subject to risk weights" (column 0200) must equal the sum of "SEC-IRBA" (column 0210), "SEC-SA" (column 0280), "SEC-ERBA" (column 0350), "Internal assessment approach" (column 0640) and "OTHER (RW=1250%)" (column 0700).

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  3. 03If they differ, a part is missing, a value sits in the wrong cell, or the total is out of date.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 C13.01.01 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

Credit risk: securitisations (CR SEC) (C13.01.01.01)

Rows

  • R0010Total exposures
  • R0020SECURITISATIONS
  • R0030Qualifying for differentiated capital treatment
  • R0040Sts exposures
  • R0050Senior position in SMEs securitisations
  • R0060Not qualifying for differentiated capital treatment
  • R0070RE-SECURITISATIONS
  • R0080Originator: total exposures
  • R0090Securitisations: on-balance sheet items
  • R0100Qualifying for differentiated capital treatment
  • R0110Of which: senior exposures
  • R0120Not qualifying for differentiated capital treatment
  • R0130Of which: senior exposures
  • R0140Securitisations: off-balance sheet items and derivatives
  • R0150Qualifying for differentiated capital treatment
  • R0160Of which: senior exposures
  • R0170Not qualifying for differentiated capital treatment
  • R0180Of which: senior exposures
  • R0190RE-SECURITISATIONS
  • R0200Investor: total exposures
  • R0210Securitisations: on-balance sheet items
  • R0220Qualifying for differentiated capital treatment
  • R0230Of which: senior exposures
  • R0240Not qualifying for differentiated capital treatment
  • R0250Of which: senior exposures
  • R0260Securitisations: off-balance sheet items and derivatives
  • R0270Qualifying for differentiated capital treatment
  • R0280Of which: senior exposures
  • R0290Not qualifying for differentiated capital treatment
  • R0300Of which: senior exposures
  • R0310RE-SECURITISATIONS
  • R0320Sponsor: total exposures
  • R0330Securitisations: on-balance sheet items
  • R0340Qualifying for differentiated capital treatment
  • R0350Of which: senior exposures
  • R0360Not qualifying for differentiated capital treatment
  • R0370Of which: senior exposures
  • R0380Securitisations: off-balance sheet items and derivatives
  • R0390Qualifying for differentiated capital treatment
  • R0400Of which: senior exposures

And 25 more.

Columns

  • C0200Subject to risk weights
  • C0210SEC-IRBA
  • C0280SEC-SA
  • C0350SEC-ERBA
  • C0640Internal assessment approach
  • C0700OTHER (RW=1250%)

A worked example

With simple numbers.

Illustrative values
SEC-IRBA1,200
SEC-SA800
SEC-ERBA450
Internal assessment approach300
OTHER (RW=1250%)150
Together2,900
What the rule then expects

Subject to risk weights 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:

v7326_m: [C13.01.01.01 (All rows)] {c0200} = {c0210} + {c0280} + {c0350} + {c0640} + {c0700}
Show the formulaShow

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

{t: C13.01.01.01, c: 0200} = {t: C13.01.01.01, c: 0210} + {t: C13.01.01.01, c: 0280} + {t: C13.01.01.01, c: 0350} + {t: C13.01.01.01, c: 0640} + {t: C13.01.01.01, c: 0700}

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

scope({t: C13.01.01.01, r:0010;0020;0030;0040;0050;0060;0070;0080;0090;0100;0110;0120;0130;0140;0150;0160;0170;0180;0190;0200;0210;0220;0230;0240;0250;0260;0270;0280;0290;0300;0310;0320;0330;0340;0350;0360;0370;0380;0390;0400;0410;0420;0430;0450;0460;0470;0480;0500;0510;0520;0530;0540;0550;0560;0570;0580;0590;0600;0610;0620;0630;0640;0650;0660;0670, f: banking, fv: banking_reporting})

Every PRA banking rule on C13.01.01.01

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.