Company accounts filing deadline

Check your company’s financial year-end. The deadline for both filing your annual accounts and paying your corporation tax bill is usually 9 months after the end of your company’s financial year, while your corporation tax return is due 12 months after the end of the accounting period it covers.

Corporation tax return

Filing deadline for corporation tax return self-assessment form CT600 for period ended 31 January 2023 to be submitted to HMRC.

Balancing payment

Midnight deadline to pay any outstanding tax you owe from 2021/22.