Limited companies are required to file a confirmation statement (previously an annual return) with Companies House once a year. The company should receive an email alert or a reminder letter when the confirmation statement is due. The due date is usually a year after either:
the date the company was incorporated
the date the company filed its previous annual return of confirmation statement.
The company can file the confirmation statement up to 14 days after the due date, with no penalty.
Self-assessment tax returns
The deadlines for self-assessment for the year ended 5 April 2018 are as follows:
Registering under self-assessment 5 October 2018
Filing paper tax return 31 October 2018 (Wednesday)
Filing online tax return 31 January 2019 (Thursday)
Making first payment on account 31 January 2018
Making second payment on account 31 July 2018
Balance of tax payable 31 January 2019.
Payments on account as shown above will be due unless:
the last self-assessment tax bill was less than £1,000
already paid more than 80% of all the tax due (eg via salary and PAYE tax code).
Expenses and benefits for employees
The filing deadlines for benefits for employees for the 2017/18 tax year are as follows:
P11D forms to HMRC online 6 July 2018
Give employee copy of P11D form 6 July 2018
P11D(b) form to HMRC online 6 July 2018
Pay class 1A NI on benefits 19 July 2018 (by cheque)
Pay class 1A NI on benefits 22 July 2018 (other payment method)
Pay tax and class 1B NI on 19 October 2018 (by cheque) PAYE settlement agreement
Pay tax and class 1B NI on 22 October 2018 (other payment method) PAYE settlement agreement