Of the 10,328 U.K. organisations that reported gender pay gap data for the 2017-2018 year, some 1,500 failed to meet the reporting deadline. 

Technically speaking, there were two deadlines. The first, on 30 March, was for public organisations, while the second, on 4 April, was for businesses and charities. Enforcement action will start when the Equality and Human Rights Commission (EHRC) writes to all employers that have not complied with the law. The EHRC indicated that letters will be sent on 9 April and employers will be given 28 days to comply before an investigation takes place. If they do not comply, an “unlawful act notice is issued.” Failure to comply “will ultimately lead to an unlimited fine decided by the courts,” according to the EHRC.