| March 2019 | |
| 31st | Last minute planning for tax year 2018/19 |
| April 2019 | |
| 19th | Automatic interest is charged where PAYE tax, Student loan deductions, Class 1 NI or CIS deductions for 2018/19 are not paid by today |
| 19th | PAYE quarterly payments are due for small employers for the pay periods 6th January 2018 to 5th April 2019 |
| 19th | PAYE, Student loan and CIS deductions are due for the month to 5th April 2019 |
| May 2019 | |
| 3rd | Deadline for submitting P46(car) for employees whose car/fuel benefits changed during the quarter to 5 April 2019 (other than replacing one car with another) |
| 19th | Deadline for employers’ year end PAYE returns (P35, etc) to be submitted online for 2018/19 |
| 19th | PAYE, Student loan and CIS deductions are due for the month to 5th May 2019 |
| 31st | Deadline for forms P60 for 2018/19 to be issued to employees |
| June 2019 | |
| 19th | PAYE, Student loan and CIS deductions are due for the month to 5th June 2019 |
| July 2019 | |
| 5th | Deadline for reaching a PAYE Settlement Agreement for 2018/19 |
| 6th | Deadline for forms P11D, P9D and P11D(b) for 2018/19 to be submitted to HMRC and copies to be issued to employees concerned |
| 6th | Deadline for employers to report share incentives (Form 42) for 2018/19 |
| 19th | Class 1A NIC due for 2018/19 |
| 19th | PAYE Student loan and CIS deductions due for the month to 5th July 2019 |
| 19th | PAYE quarterly payments are due for small employers for the pay periods 6th April 2019 to 5th July 2019 Penalties may apply if payment is made late |
| 31st | Second £100 penalty if 2017/18 tax return due on 31st January 2019 is still outstanding |
| 31st | Second payment on account 2019/20 due. Second 5% surcharge on any 2018/19 outstanding tax due on 31st January 2019 still remaining unpaid |
| August 2019 | |
| 2nd | Deadline for submitting P46 (car) for employees whose car/fuel benefits changed during the quarter to 5th July 2019 (other than replacing one car with another) |
| 19th | PAYE, Student loan and CIS deductions are due for the month to 5th August 2019 |
| 19th | PAYE, Student loan and CIS deductions are due for month to 5th September 2019 |
| October 2019 | |
| 5th | Deadline for notifying HMRC of new sources of taxable income or gains for 2018/19 if no tax return has been issued |
| 19th | Tax and NI due under a 2018/19 PAYE Settlement Agreement |
| 19th | PAYE, Student loan and CIS deductions are due for the month to 5th October 2019 |
| 19th | PAYE quarterly payments are due for small employers for the pay periods 6th July 2019 to 5th October 2019 |
| 31st | Deadline for submitting ‘paper’ 2018/19 self-assessment returns |
| November 2019 | |
| 2nd | Deadline for submitting P46(car) for employees whose car/fuel benefits changed during the quarter to 5th October 2019 (other than replacing one car with another) |
| 19th | PAYE, Student loan and CIS deductions are due for the month to 5th November 2019 |
| December 2019 | |
| 19th | PAYE, Student loan and CIS deductions are due for the month to 5th December 2019 |
| 30th | Online filing deadline for submitting 2018/19 self-assessment return if you require HMRC to collect any underpaid tax by making an adjustment to your 2020/21 tax code |
| January 2020 | |
| 19th | PAYE, Student loan and CIS deductions are due for the month to 5th January 2020 |
| 19th | PAYE quarterly payments are due for small employers for the pay periods 6th October 2019 to 5th January 2020 |
| 31st | Deadline for submitting 2018/19 self-assessment return (up to £100 penalty if your return is late).Balance of 2018-19 tax due, plus first payment on account for 2019/20 |
| February 2020 | |
| 2nd | Deadline for submitting P46(car) for employees whose car/fuel benefits changed during the quarter to 5th January 2020 (other than replacing one car with another) |
| 19th | PAYE, Student loan and CIS deductions are due for the month to 5th February 2020 |
| 28th | 5% penalty surcharge on any 2018/19 outstanding tax due on 31st January 2018 still remaining unpaid |
| March 2020 | |
| 19th | PAYE, Student loan and CIS deductions are due for the month to 5th March 2020 |
| 31st | Last minute planning for tax year 2019/20 |
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