Self-Assessment Tax Returns Made Simple
Self-Assessment isn’t as straightforward as it seems, and your time is valuable. Let Simplified Global Accounting Solutions take care of your self-assessment tax return, ensuring you stay compliant and avoid penalties.
New clients: Please contact us no later than November to get support with your January returns.
Key Dates for Self-Assessment
The UK tax year runs from 6th April to 5th April each year. Typically, you pay your tax between November and January for the previous year’s income.
| Task | Deadline |
|---|---|
| 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 (Payment on Account) | 31st July |
Who Needs to Complete a Self-Assessment?
You need to complete a self-assessment if you have income not taxed under PAYE (Pay As You Earn).
PAYE automatically deducts tax from salaries before payment. However, if you earn income from other sources, you must register for self-assessment and submit an annual tax return.
You must register if you are:
Self-employed
A director of a limited company
A minister of religion
A landlord or rent out a room (e.g., Airbnb)
Earning income from savings or investments
Receiving secondary overseas income
Consequences of Missing the Deadline
Failing to submit your tax return on time triggers automatic penalties, which increase with delay.
Penalties Overview:
Late submission: £100
Continued late submission (daily): £10 per day, up to £900
6+ months late: Additional penalty of 3% of tax due or £300 (whichever is higher)
12 months late: Another £300 on top of previous penalties
Avoid penalties and unnecessary stress by ensuring your tax return is completed before the deadline.
Simplified Global Accounting Solutions provides end-to-end self-assessment support:
Preparing and filing your tax return online or via paper forms
Calculating amounts owed
Advising on tax reliefs and exemptions
Book a free consultation today to secure your self-assessment tax return and focus on what you do best—running your business and growing your wealth.