The deadline for submitting your corporation tax return is 12 months after the end of the accounting period it covers.
Your corporation tax is payable 9 months and 1 day following the end of the accounting period it relates to.
|Time after your deadline||Penalty|
|3 months||Another £100|
|6 months||HM Revenue and Customs (HMRC) will estimate your Corporation Tax bill and add a penalty of 10% the unpaid tax|
|12 months||Another 10% of any unpaid tax|
If your return is late 3 times in a row the penalties increase to £500 each.