The deadline for submitting P11D forms for the 2025/26 tax year is 6 July 2026. Employers must also submit form P11D(b) by this date to report the total Class 1A National Insurance due on taxable benefits and expenses provided to employees and directors.

The deadline for submitting P11D and P11D(b) forms is 6th July 2025 - just two weeks away. As the deadline falls on a Sunday, it's worth planning ahead to avoid any last-minute stress.