10xxx · Message header
CESOP error 10030
“The period is before 01/01/2024”
Caught before you file
What it means
The ReportingPeriod is earlier than the first CESOP quarter. Reporting begins with the quarter starting 1 January 2024, and earlier periods are rejected outright.
Why files get it
- A wrong Year in ReportingPeriod, often from a template or a test file.
- A date field mapped to the period by mistake.
How to fix it
- Set ReportingPeriod to the quarter the payments were made in — Q1 2024 or later.
Check a file for 10030 before you submit
The free validator runs the CESOP business rules against your file and names the error each finding would become — 10030 included — so the Validation Result is not where you first hear about it.
The file is parsed in your browser tab. No upload, no account.
Source: the error catalogue in the Payment Data XSD User Guide — CESOP, v4.40 (DG TAXUD), §2.2.3.18. The explanation is ours; it describes the file format and is not tax advice.