Line4

1 min readWarningEBA reporting framework 4.2Updated 10 November 2026

Corporate items [CI]: maximum single loss cannot be more than sum of the five largest losses (EBA rule v8724_m)

A warning in the own funds and capital requirements return (COREP own funds), on template C 17.01.a, operational risk: losses and recoveries by business lines and event types in the last year.

Check your file against this ruleWhat to do if it fails

The rule in plain words

For corporate items [CI]: maximum single loss cannot be more than sum of the five largest losses.

EBA checks it for eight columns: internal fraud, external fraud, employment practices and workplace safety, clients, products & business practices, damage to physical assets, business disruption and system failures, execution, delivery & process management, and total event types. That makes eight checks. A failure names the one that failed.

How the Line4 Check report words itShow

The first of its checks, word for word as the report shows it when it fails. The others read the same, with their own column, row or sheet.

EMPLOYMENT PRACTICES AND WORKPLACE SAFETY: Maximum single loss <= Sum of the five largest losses

What to do if your filing fails it

  1. 01Open the template below and find the cells the rule reads.
  2. 02Compare the values in your file. If the first is bigger than it may be, one of them is wrong: check both before you change either.
  3. 03EBA allows a small rounding difference, worked out from the decimals each value is reported with.
  4. 04It runs only when your filing indicators mark C 17.01 as reported.
  5. 05This is a warning. It does not stop the filing on its own, but your authority may ask you to explain it.

The cells it reads

Operational risk: losses and recoveries by business lines and event types in the last year (C 17.01.a)

Rows

  • 0850Maximum single loss
  • 0860Sum of the five largest losses

Columns

  • 0010INTERNAL FRAUD
  • 0020EXTERNAL FRAUD
  • 0030EMPLOYMENT PRACTICES AND WORKPLACE SAFETY
  • 0040CLIENTS, PRODUCTS & BUSINESS PRACTICES
  • 0050DAMAGE TO PHYSICAL ASSETS
  • 0060BUSINESS DISRUPTION AND SYSTEM FAILURES
  • 0070EXECUTION, DELIVERY & PROCESS MANAGEMENT
  • 0080TOTAL EVENT TYPES

A worked example

The first of its checks, with simple numbers.

Illustrative values
Maximum single loss1,200
What the rule then expects

Sum of the five largest losses must then be at least 1,200.

1,200Passes
1,100Fails

A file that reports 1,200 passes. One that reports 1,100 fails, by 100.

The numbers are illustrative, reported to the unit, so the rounding tolerance does not change the result.

Show the rule as writtenShow

EBA's formula, as written out for the first of its checks. Cells are written as {template, row, column, sheet}.

{C_17.01.a,r0850,c0030,} <= {C_17.01.a,r0860,c0030,}

The next five:

{C_17.01.a,r0850,c0040,} <= {C_17.01.a,r0860,c0040,}{C_17.01.a,r0850,c0020,} <= {C_17.01.a,r0860,c0020,}{C_17.01.a,r0850,c0060,} <= {C_17.01.a,r0860,c0060,}{C_17.01.a,r0850,c0070,} <= {C_17.01.a,r0860,c0070,}{C_17.01.a,r0850,c0080,} <= {C_17.01.a,r0860,c0080,}

And 2 more, the same formula for the other cells it covers.

Every COREP own funds rule, by template

Checks like this one, run at the point of submission, are the first step to real-time supervision.