What We Do

Self Assessment Tax Returns

Filing your self assessment tax return doesn’t have to be a headache. With over 40 years of experience, Mollan & Co can help simplify your personal taxes.

Changing Accountant York

Whether you’re a freelancer, small business owner or landlord, our Yorkshire-based team will guide you through each step of your self assessment tax return – from declaring multiple income streams to claiming any deductions you may be entitled to.

With our personalised approach, you can trust that your tax return will be filed accurately, on time, and in compliance with all HMRC regulations.

Contact us today to book your free, no-obligation consultation.


What is a Self Assessment Tax Return?

Self assessment tax returns are typically filed annually by self-employed people who have income outside of the PAYE system – such as sole traders, landlords, partners in partnerships, company directors, and high earners.

These personal tax returns will include information on all types of income earned in the last tax year (from April 6th to April 5th). This may include income from:

  • Employment
  • Self-employment
  • Rental properties
  • Investments
  • …and more

The self assessment will include details of any capital gains or losses incurred during the tax year, and taxpayers can also claim deductions, allowances, and any relevant tax credits or benefits – which can help significantly reduce their final tax bill.

For more information on what information you’ll typically need to complete a personal tax return, see our checklist.

When is the deadline for self assessment?

The deadline for submitting a self assessment tax return in the UK is October 31st for paper submissions and January 31st for online submissions. Tax payments are also due by this date.

If you miss the deadline or make a mistake in the information provided, you may receive a fine or even trigger a more in-depth tax investigation. The best way to avoid this is to work with a professional accountant who can ensure your taxes are filed both accurately and on time.


Do I need to submit a Self Assessment Tax Return?

Whether you need to submit a self assessment tax return depends on your individual circumstances and sources of income.

In the UK, you must send a personal tax return if any of the following applied to you during the last tax year:

  • You were self-employed as a sole trader and earned over £1,000 after tax relief
  • You were a partner in a business partnership
  • Your total taxable income was over £100,000
  • You had to pay Capital Gains Tax when you sold something that increased in value
  • You were subject to the High Income Child Benefit Charge

You may also need to send a tax return if you have any untaxed income from other sources, including but not limited to:

    • COVID-19 grant or support payments
    • Income from renting out a property
    • Tips or commission
    • Income from savings, investments or dividends
    • Foreign income.Top of Form

If you’re unsure whether this applies to you, HMRC provide a free tool to check whether you need to submit a Self Assessment Tax Return.


How a self assessment accountant can help

  • Save Time

Filling in your tax return can be confusing and time-consuming, especially if you have several income sources or investments. Our personal accountants will take this task off your plate, so you can focus on your business.

  • Expert Knowledge

As professional accountants with more than 40 years of tax experience, we can help identify potential deductions, allowances and tax credits that you may be eligible for – saving you money on your tax bill.

  • Avoid Errors and Penalties

Mistakes on your personal tax returns can lead to penalties, interest charges or even tax investigations by HMRC. Mollan & Co has the expert knowledge to accurately complete your tax return, reducing the risk of errors and ensuring compliance with UK tax law.

  • Peace of Mind

Hiring a qualified professional means you can trust your taxes will be filed correctly and on time, reducing stress and helping you sleep easily.

Get in touch today to book your free, no-obligation consultation

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  • Fantastic support in guiding me through a complex situation! Rob was brilliant in detailing each section of the process and took our concern and resolved it professionally. The advice was really clear and I can highly recommend Rob and the team.

    - Mark Groves

Xero Gold Partner

Xero Accountants Gold Partner