PAYE50935 - Employer returns: employer starter and leaver forms: employer e-file in-year penalties: in-year penalty cycle
In-year penalties are issued 4 times a year, usually in the third week following the end of the tax quarter in which the employer has not filed starter and leaver forms online.
The tax quarters are
Q1 6 April - 5 July
Q2 6 July - 5 October
Q3 6 October - 5 January
Q4 6 January - 5 April