Self Assessment tax returns for individuals, sole traders and practices
Opening soon. Farside Accounting Ltd's registration with HMRC for anti-money-laundering supervision is in progress. We are happy to talk now, and will take on client work once that registration is confirmed.
Self Assessment returns prepared from your records, checked by a named reviewer and ready well before 31 January. For sole traders, landlords and directors, and for practices that need extra capacity in January.
Figures checked against GOV.UK on 14 October 2026. General information, not advice.
Your Self Assessment tax return
- What we do
- Prepare the return from your income records, including self-employment, property, dividends and savings. Sole trader accounts are prepared alongside so the two tie out.
- What you get back
- The return and the tax due, including payments on account, for you to approve before it's submitted.
- Who it suits
- Sole traders, landlords, company directors and anyone HMRC has asked to file.
Outsourced Self Assessment for accounting firms
- How it works
- Send us the client records and we prepare the returns to a checklist, with a query list for anything missing.
- January capacity
- The peak runs from autumn to 31 January, and that's when extra hands count. Agree volumes with us early.
- Filing
- Prepared ready to file under your credentials, after your review.
Who does what is set out in full on our services page.
Self Assessment dates and penalties
- Register
- By 5 October after the end of the tax year in which you first need to file.
- File
- 31 October for paper returns, 31 January for online returns.
- Pay
- Balancing payment and first payment on account by 31 January. Second payment on account by 31 July.
- Late filing
- £100 straight away. After 3 months, £10 a day up to £900. At 6 and 12 months, a further 5% of the tax due or £300, whichever is greater.
- Coming next
- Making Tax Digital for Income Tax: sole traders and landlords with qualifying income over £30,000 join from 6 April 2027. See our MTD guide.
Common questions
When is the Self Assessment deadline?
31 January for online returns, and 31 October for paper returns, after the end of the tax year.
What happens if I file my tax return late?
An automatic £100 penalty, then £10 a day after 3 months, then further penalties at 6 and 12 months.
Can my practice outsource Self Assessment returns to you?
Yes. We prepare to a checklist, raise queries through you, and you file under your credentials.
Talk to us
Start with the one line that takes the most of your time. We scope it in a short call. Start a conversation.
Related services
Bookkeeping services · Payroll services · Corporation tax returns · All services