When do I have to pay corporation tax?

The deadline for paying corporation tax falls before the deadline for filing a Company Tax Return, so make sure you don’t confuse the two dates. HMRC will let you know when your tax is due and when you should file your tax return. Corporation tax must be paid electronically within 9 months and 1 day of the end of the company’s corporation tax ‘accounting period’. This will usually be the end of your company’s financial year.