Dates & deadlines
Important accounting dates and deadlines
From self-assessment to corporation tax return deadlines, here is a comprehensive list of important accounting dates and deadlines.
21 January 2021
EC sales list (online)
Online deadline to report the value of goods and services supplied to VAT-registered businesses in EU member states.
Due date for payment of supplementary declarations for December 2020.
22 January 2021
Employers’ monthly PAYE (online)
Monthly deadline for electronic payments of PAYE, Class 1 NICs and student loan deductions from December 2020.
Employers’ quarterly PAYE (online)
Quarterly deadline for electronic payments of PAYE, Class 1 NICs and student loan deductions from Q3 2020/21.
CIS return (online)
Monthly CIS deadline for online returns following the last month.
31 January 2021
Midnight deadline to pay any outstanding tax you owe from 2018/19.
First payment on account
Midnight deadline to pay half of any tax owed for 2019/20. Because of COVID-19, it’s possible to defer this until 31 January 2022.
Corporation tax return
Filing deadline for corporation tax return self-assessment form CT600 for period ended 31 January 2020.
Company accounts filing deadline
Deadline for filing your company tax return is 12 months after your accounting period for corporation tax ends.
Personal tax returns (online)
Midnight deadline to submit online tax returns for 2019/20 through self-assessment.
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