
ICAEW Chartered Accountants
With a team of fully qualified experts, we deliver high-level tax advice and solutions tailored to your business needs.
See certificationWho needs to File a Self-Assessment Tax Return?
At Griffith Accountants, we offer comprehensive Self Assessment Services to individuals, sole traders, and landlords. Our team ensures that your tax returns are filed accurately and on time, minimising the risk of penalties while optimising your tax position. Whether you’re filing for the first time or need ongoing support, we’re here to help you navigate the complexities of Self Assessment.
- Self-Employed Individuals: Sole traders and freelancers must declare their income and claim allowable expenses.
- Company Directors: Directors with untaxed income, dividends, or capital gains need to file returns.
- Landlords: Rental income and associated expenses must be reported to HMRC.
- High Earners & Investors: Individuals with income exceeding £50,000, particularly those receiving child benefits or dividends.
- Individuals with Foreign Income: UK residents earning income from abroad are also required to file a return.
What’s Included

Tax Return Preparation
Preparation and submission of your Self Assessment tax return, ensuring accuracy and compliance with HMRC.

Income & Expense Management
Help with organising and categorising your income, business expenses, and allowable deductions.

Tax Planning & Optimisation
Identifying opportunities for tax savings, including available reliefs and allowances.

Late Filing & Penalty Resolution
Support for late tax return filings and mitigating penalties or interest charges.

Guidance on Tax code & Payments
Clarifying your tax code and providing advice on payments due.
Explore more benefits
You can benefit from us doing your Self-Assessment too!
We specialise in taking the stress out of self-assessment tax returns for individuals, self-employed professionals, and business owners.
Get Started See Common Mistakes
As a growing business, we needed more strategic financial guidance, and Griffith Accountants delivered exactly what we were looking for.
Their CFO services have helped us streamline our financial planning, improve cash flow management, and make more informed decisions.
Their team became an extension of our own, providing senior-level insights that have supported our growth. We now feel confident in our financial strategy, and their support has been invaluable as we scale.
Alex Yardley, Founder & CEO of Fly Fairly
Common Mistakes to Avoid
Many individuals face challenges when filing their self-assessment returns, leading to errors that could result in penalties. These include:
- Missing deadlines (31st of January for online submissions);
- Failing to report all income sources;
- Misunderstanding capital gains or allowable expenses;
Need company in the UK?
At Griffith Accounting, we understand that preparing company accounts can be complex and time-consuming, especially for small and medium-sized businesses.

Why Griffith Accountants
Expert Knowledge
Up-to-date insights on UK tax legisaltion.
Tailored Support
Personalised tax strategies for your business.
Compliance & Efficiency
Ensuring compliance while optimising tax savings.
Self Assessment FAQs
Self Assessment is a system used by HMRC to collect income tax. If you’re self-employed, a contractor, or have other untaxed income, you need to file a tax return each year.
The deadline for filing your online tax return is 31 January following the end of the tax year, with payments due by the same date.
You’ll need details of your income, expenses, and any applicable deductions, such as pension contributions or charitable donations.
Yes, if you have additional income such as rental income, freelance work, or investments, you may need to file a Self Assessment return, even if you’re employed.
We assist with the preparation, submission, and tax planning of your Self Assessment return, ensuring accuracy and minimising any tax liabilities.
While we aim to cover all questions in our FAQ, obviously it’s impossible therefore for ease of knowledge, we would advise you to book a meeting with us.
Book a meeting
Accounting Done For You
Everything you need to know regarding your company accounts will be covered in our preliminary discussion with your or your team.
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