Self-Assessment Deadlines
Self-Assessment Tax Return Deadlines
The deadlines for sending in tax returns are:
- 31 January after the end of the tax year if you want to work out your own tax bill
- 30 September if you ask HMRC to work out the tax
- 30 December if you file the return over the internet (29 December if using the Electronic Lodgement Service) and you want an underpayment (not exceeding £2,000) to be collected via the PAYE system.
The penalties for late returns are:
- £100 (automatic) - return up to 6 months late
- £200 (automatic) - return more than 6 months late
- 100% of tax due (max) - return more than 12 months late
- £60 per day (maximum) for continuing delay - if approved by the Commissioners for HMRC.
There is also a fine for late payment of tax called ’surcharge’. Surcharge is payable on tax underpaid if overdue for more than 28 days, as follows:
- after 28 days - 5% of the tax unpaid
- after 6 months - a further 5% of the tax unpaid