14th January – Deadline for submission of forms CT61 and payment of any associated income tax.
19th January – PAYE and NIC due for the month ended 5 January 2016. Deadline for postal payments remittance of PAYE, NICs and CIS.
22nd January – Deadline for electronic remittance of PAYE, NICs and CIS to HMRC.
31st January – Final submission date for self-assessment Tax Returns. First payment on account due in respect, tax and class 4 NIC self assessment.