Key filing deadlines you need to know

Missing a filing deadline can result in significant financial penalties and potential action against company directors. It is crucial to understand the distinct timelines for Companies House and HMRC.

Companies House Deadlines

For a private limited company, your first accounts must be filed 21 months after the date of incorporation. For subsequent years, accounts must be filed within 9 months of your company's financial year end.

Companies House Penalties

Penalties are strictly enforced. Being up to 1 month late costs £150. 1 to 3 months late is £375. 3 to 6 months is £750. More than 6 months late incurs a £1,500 penalty. If you file late two years in a row, these penalties are doubled.

HMRC Deadlines

Your CT600 Company Tax Return must be filed with HMRC within 12 months of the end of your accounting period. However, any Corporation Tax you owe must usually be paid within 9 months and 1 day of the end of the accounting period.

HMRC Penalties

HMRC issues a £100 penalty if you are even 1 day late. If you are 3 months late, another £100 is added. At 6 months late, HMRC estimates your tax bill and adds a penalty of 10% of the unpaid tax. At 12 months late, another 10% is added.