When is Corporation Tax Due

There are two corporation tax due dates to be aware of. Your Corporation Tax Payment is due 9 months and 1 day after the end of an accounting period and your Corporation Tax Return is due for filing 12 months after an accounting period ends.

What is an Accounting Period

An accounting period is the time which HMRC use to calculate the amount of Corporation Tax due.  An accounting period for working out corporation tax due can never be more than 12 months and will generally match your financial year.

An Example of Working Out When Corporation Tax is Due

A company has a year end of 31 December 2017.  It’s accounting period for Corporation Tax purposes is 1 January 2017 to 31 December 2017 so:

Corporation Tax is due for payment on 1 October 2018

Corporation Tax return is due for filing 31 December 2018.

Corporation Tax Due Dates for Newly Formed Companies

When a company is newly formed the financial year and accounting period can be longer than 12 months in the first year.  Since an accounting period for Corporation Tax cannot be more than 12 months, you may need to file two corporation tax returns in the first year of business.

An Example of Corporation Tax Due Dates for Newly Formed Companies

Example Limited was formed on 3 March 2016 and its accounting period ends 31 March each year. Company B will have 2 accounting periods to report on for Corporation Tax in the first year – 3 March 2016 to 31 March 2016 and 1 April 2016 to 31 March 2017. The corporation tax due dates for the first year will be:

Corporation Tax is due for payment on 1 January 2018

Corporation Tax return is due for filing 31 March 2018.

How to Pay Corporation Tax Due

The easiest way to pay any corporation tax due is to do it online.  You can find payment details on your Corporation Tax Payslip but if you have misplaced this then use the following bank details for your payment:

Account name Sort code Account number
HMRC Cumbernauld 083210 12001039
HMRC Shipley 083210 12001020

Always use your 17-character Corporation Tax payslip reference for the accounting period you’re paying so HMRC know how to allocate your tax payment.

Anita is a Chartered Accountant, turned blogger and creator of the ever popular free Go Self Employed Email Mini Course, which has been completed by hundreds of attendees all over the UK. Using her 10 years experience in accounting, tax and operations for Small Businesses, Anita is on a mission to make finance simple for the self employed, so they can stop stressing about tax & finances and focus on building profitable businesses which will give them the lifestyle they dream of.