Burden of proof: why your documentation is your defence (Article 18)

This is the reason maintained documentation is not merely good practice but your concrete defence. The Directive shifts the burden of proof in equal pay cases - and in some situations it shifts before the worker has even shown a difference. The distinction between the three rules in Article 18 is worth keeping crystal clear.

Three rules - do not mix them up

• Article 18(1) - the general shift. When a worker establishes facts from which it may be presumed that there has been direct or indirect discrimination, it is for the employer to prove that there has been no discrimination in relation to pay.
• Article 18(2) - the shift where transparency is lacking. Where the employer has not met the transparency obligations in Articles 5, 6, 7, 9 and 10, it is for the employer to prove that there has been no discrimination - without the worker first having to establish anything. The exception is that the employer can prove that the breach was manifestly unintentional and minor.
• Article 18(5) - the exclusion for criminal proceedings. The rules do not apply to criminal proceedings, unless national law provides otherwise.

The most common mistake is to swap Article 18(2) and Article 18(5). It is Article 18(2) that concerns the lack of transparency, and Article 18(5) that excludes criminal proceedings - not the other way around.

What it means in practice

The important point lies in Article 18(2): the burden of proof can shift onto you solely because a transparency obligation has not been met - for example if a request for information was not answered within the deadline, or a report was not submitted. So it does not require the worker first to have established a pay difference. That is why complying with the transparency obligations is not only a duty in itself - it is also what determines who has to prove what if a case arises.

The Danish draft

The Danish draft bill implements Article 18(2) in proposed § 6(3)-(4): a failure to meet the listed transparency obligations establishes the prima facie case and thereby shifts the burden of proof to the employer. The exception follows the Directive - the rule does not apply if the breach was “manifestly unintentional and minor”. The existing § 6(2) of the Equal Pay Act, which already implements Article 18(1), is proposed to remain unchanged. All of this is draft, not law in force - see The Danish implementation.

This is why documentation is your defence

When the burden of proof can rest with the employer, it is you who must be able to show that pay rests on objective, gender-neutral criteria. An employer with a documented, current basis - the criteria, the assessment, the audit trail - stands strong; an employer who has to reconstruct it all retrospectively during a case stands weak. That defence is built on the same building blocks as the rest: a gender-neutral assessment of the value of work, timely reporting and timely responses to requests for information.