Certified Accountant & Tax consultants in UK | Smooth Feathers

Self-Assessment is not as simple as it seems. Plus, you could do other essential stuff instead spending your time into it. Join our service to get complete self-assessment tax return advice. Make sure you book for the service well before the deadline so we could help you. Our new clients must contact us no later than November for help with their January returns.

Follow these simple tips to complete your self-assessment tax returns: –

Key Dates : -

The tax year begins on the 6th April and ends on the 5th April every year. Mostly you pay your tax between November and January for the last year. For instance, you will pay tax in January 2020 for the income earned in between April 2018 and April 2019.

Have a look at some other deadlines for self-assessment in cases of specific instances only.


  • Registering for Self-Assessment – 5th October
  • Paper Tax Returns – 31st October
  • Online Tax Returns – 31st January
  • Payment for All Tax – 31st January
  • Optional mid-year payment On Account – 31st July

Do I need to Complete a Self-Assessment Tax Return?

You will need to complete a self-assessment tax return if you have any income that’s not PAYE (i.e.: paid via employment with a company).

PAYE pay deducts the tax from your salary before it is paid into your account – you can see this on your pay slip. If you have other taxable source of income then you will need to register for self-assessment and complete your annual return to pay the tax amount you owe.

Register for self-Assessment if…

  • You are self employed
  • You are a director of a limited Company
  • You are a minister of religion
  • You are a landlord or rent a room online, e.g., Airbnb
  • You gather income from savings or investment
  • You have a secondary overseas income

What happens if I miss the deadline?

Missing out on your self-assessment deadline will result in an automatic penalty. You will be charged for each day that your tax return is late, up to a fixed amount. There are various other penalties for non-compliance, so it is best to ensure that your tax return is done before the deadline and you are able to pay the tax you owe.


Things to consider…

    • Late submission – £100
    • Late submission continued – £10 per day up to a maximum of £900
    • Late submission 6+ months – additional penalty of 3% or £300 (whichever is greater)
    • Late submission 12 months – another £300 on top of the above listed penalties

    About us

    Smooth Feathers Accountants is a premier firm of Accountants and Tax Consultants in the United Kingdom. Our team provides a broad range of expert solutions for small and medium scale companies, individuals, start-ups and non-profit organizations.

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