Self Assessment Tax Return (SA100)
Filing a Self Assessment tax return (SA100) can be challenging, especially for freelancers, contractors, and sole traders who manage their finances independently. At Accouny, we simplify the entire process by helping you prepare and submit your tax return accurately and on time.

Keeping organised records of your income and expenses makes the filing process much easier. Our accountants guide you through every step, ensuring your return is completed correctly and submitted to HM Revenue & Customs before the deadline.
UK Self Assessment Tax Return Filing
Our experienced tax specialists provide professional support for individuals who need help managing their personal tax affairs. From reviewing income details to preparing and submitting the final return, we ensure that your Self Assessment is handled efficiently and in compliance with HMRC requirements.
When Do You Need to File a Self Assessment Tax Return?
Self Assessment tax returns must be submitted online by 31 January following the end of the relevant tax year. Filing early is always recommended as it gives you enough time to review your finances and plan your tax payments. If you are unsure whether you need to file a return, our team can provide guidance and help you understand your tax obligations.
Penalties for Late Filing
Missing the Self Assessment deadline can lead to penalties and additional interest charges from HM Revenue & Customs. Even if no tax is due, late submissions may still result in fines. Our accountants help ensure your tax return is prepared and submitted before the deadline to avoid unnecessary penalties.
SA302 Tax Calculation
We also provide SA302 tax calculations, which are often required when applying for mortgages or loans. This document provides a summary of your declared income and tax payments for a particular tax year and is commonly requested by lenders as proof of income.
What Information Do We Need?
To prepare your Self Assessment tax return, we typically require basic information about your income, expenses, and other relevant financial details. Even if your records are not fully organised, our team can help review your information and ensure everything is properly documented.
Personalised Tax Advice
At Accouny, our experienced accountants not only prepare and submit your Self Assessment tax return but also provide guidance on tax planning and financial management. Our goal is to help you stay compliant, reduce tax stress, and manage your personal tax obligations with confidence.