Home › Services › Sole traders

Self Assessment · fixed fee

Self Assessment for Sole Traders in London

Accurate sole trader tax returns, filed online for a fixed fee. We claim every legitimate expense so you keep more of what you earn.

★★★★★ Rated Excellent by clients on Google

Standard

£199 + VAT

One-off fixed fee. No hidden extras.

SA100 return prepared and filed online
Employment, self-employed, rental, dividend and investment income
Tax liability calculated, refund claimed if due
Allowances and reliefs checked
Filing confirmation sent to you

Trusted by 270+ businesses

Sole traders, landlords and directors

Qualified accountants

ICAEW, ACCA and AAT qualified team

Fixed fee, no surprises

Agreed up front, paid securely online

Part of Accotax

A trading style of Accotax, accotax.co.uk

Overview

Sole trader tax returns without the stress

As a sole trader you and your business are one and the same for tax, so your profits are taxed through your personal Self Assessment return. You must report your income and allowable expenses on the SA103 self-employment pages and pay Income Tax and Class 4 National Insurance on your profit.

We prepare your return from your bookkeeping, bank statements or spreadsheets, apply the correct expenses or the £1,000 trading allowance, and tell you exactly what you owe. If you are just starting out, we can also register you for Self Assessment and get your UTR.

This service is for you if…

You run a business as a sole trader or self-employed individual
You started trading in the 2025/26 tax year and need to file for the first time
You are unsure whether to claim expenses or the trading allowance
You have a second job or side income as well as your business
You want help with payments on account and next year budget
You are behind with your bookkeeping and need records sorted

What we do for you

What is included in our sole traders service

SA103 self-employment pages

We calculate your profit from your income and allowable expenses, or apply the £1,000 trading allowance when it saves you more.

Expense review

Home office, vehicle, phone, insurance, equipment and more: we check what is allowable and what is not.

Tax calculation

You see your Income Tax, National Insurance and any payments on account before we file.

Online filing with HMRC

We file securely online and send you the filing confirmation and your SA302 tax calculation.

Deadlines and payments

We tell you exactly what to pay, how much, and when, including payments on account.

Accountant support

Ask us questions by phone, email or WhatsApp throughout, from a qualified accountant.

Know the rules

Key Self Assessment rules for sole traders

The trading allowance lets you earn up to £1,000 of self-employed income tax-free instead of claiming expenses. You cannot claim both.
You pay Class 4 National Insurance at 6% on profits between £12,570 and £50,270 and 2% above that. Class 2 is no longer compulsory, but you may choose to pay it voluntarily to protect your State Pension record.
Your tax bill may include payments on account: two advance payments towards next year on 31 January and 31 July, each usually half of this year’s bill.
From 6 April 2026, Making Tax Digital for Income Tax applies to sole traders and landlords with qualifying income over £50,000, with lower thresholds following in 2027 and 2028. We can advise whether it affects you.
Keep your records for at least 5 years after the 31 January filing deadline.

How it works

Your tax return done in four simple steps

Order online

Choose your package and pay securely online. Your fixed fee is confirmed before we start.

Send your details

Complete our short questionnaire and upload your documents. We tell you exactly what we need.

We prepare your return

A qualified accountant prepares your SA100, checks reliefs and sends you the figures to approve.

We file with HMRC

Once you approve, we file online and send your filing confirmation and tax calculation.

Client reviews

Rated by our clients on Google

      EXCELLENT  
   Based on 300 reviews 
    
 
 
 
   
 
 
       Posted on Google  
   
   Jamie Fletcher 
 
 
 
 Trustindex verifies that the original source of the review is Google. It was a pleasure working with Anum on our accounts. The whole process was swift and effortless, and it was one less thing to worry about. I'd highly recommend them.
  
 
      Posted on Google  
   
   Mansur Liman 
 
 
 
 Trustindex verifies that the original source of the review is Google. Accotax have been our accountants for many years now. We maintained them, because of their professionalism. In the last coiple of years, i have working with Imran, who has been very professional and helpful in guiding us through the whole process explaining and clarifying every aspect of it. Very prompt in responding to questions and patient with us even when we seem to be slow. I really enjoy working with him. Thank you
  
 
      Posted on Google  
   
   Muna Mohamoud 
 
 
 
 Trustindex verifies that the original source of the review is Google. I highly recommend Imran to anyone looking for a reliable and knowledgeable accountant. He helped me sort out a very complicated backlog of accounts and prepared my overdue tax returns with professionalism and attention to detail.

Throughout the process, he was incredibly patient, took the time to answer all of my questions, and explained everything clearly. He guided me through each step and helped rectify issues that had built up over time, making what felt like an overwhelming situation much more manageable.

I'm very pleased with the service I've received and truly appreciate his support. If you need help with your accounts or taxes, I would highly recommend Imran.
  
 
      Posted on Google  
   
   Sergey M 
 
 
 
 Trustindex verifies that the original source of the review is Google. I had a positive experience with Accotax. The work was completed promptly, my tax return was successfully filed, and I received a refund of overpaid tax. I found the cooperation efficient and helpful. Special thanks to Muhammad Saifullah for his assistance.
  
 
      Posted on Google  
   
   Ebba Qureshi 
 
 
 
 Trustindex verifies that the original source of the review is Google. Fabulous team at ACCOTAX - very efficient and good response time . Honest and professional with their work. I would highly recommend them even if you’re a young start up - or a large business they have it covered .
  
 
      Posted on Google  
   
   Mael Leboucher 
 
 
 
 Trustindex verifies that the original source of the review is Google. We worked with a few different accountants before finally settling with Accotax, and we’re really glad we did.

Their team is great. Abdul is responsive and easy to reach whenever I have a question, which makes a big difference. They take the time to understand how our business works and what our needs are. They are very knowledgeable, and when they don’t have the answer straight away, they take the time to look into it and get back to us quickly.

Anum, who looks after our account on a day-to-day basis, including reconciling invoices and preparing the annual accounts, is amazing. She is professional, efficient, and follows the processes we have put in place together. She's also very quickin getting back to us whenever needed. We’re very happy to work with her and hope to continue doing so for as long as possible.

Overall, Accotax has made our accounting experience much smoother and easier. We see them as a long-term partner as our business continues to grow.

I would 100% recommend them.
  
 
      Posted on Google  
   
   3rd Hub 
 
 
 
 Trustindex verifies that the original source of the review is Google. Imran provides a very dependable and straightforward accounting service. He is always responsive and professional when managing our accounts. Excellent support.
  
 
      Posted on Google  
   
   Martin Tyrrell 
 
 
 
 Trustindex verifies that the original source of the review is Google. I have really impressed to date with all dealings with Accotax highly enough. From day one, they've made what can often be a complicated and stressful part of running a business feel straightforward and hassle-free.

A special mention has to go to Anum, who has been friendly, incredibly responsive, and genuinely cares about providing the best possible service. No question is ever too much trouble, and she consistently goes above and beyond to make sure everything is dealt with efficiently.

I wouldn't hesitate to recommend you to anyone looking for an accountant they can genuinely trust.
  
 
      Posted on Google  
   
   Matthew Lyon 
 
 
 
 Trustindex verifies that the original source of the review is Google. Great speedy service and very personable. Anum dealt with my income certificate and did everything quickly and helped me out massively. Very happy with the service provided.
  
 
  
  
 
 
    Verified by Trustindex  Trustindex verified badge is the Universal Symbol of Trust. Only the greatest companies can get the verified badge who has a review score above 4.5, based on customer reviews over the past 12 months. Read more

FAQs

Sole traders Self Assessment: your questions answered

How much does a sole trader tax return cost?

Our fixed fee for a standard sole trader return is £199 + VAT. If you also have rental income or complex investments, we will quote the fixed fee for that package before you pay.

What expenses can a sole trader claim?

You can claim costs that are wholly and exclusively for your business, such as stock, software, insurance, professional fees, travel, a share of home costs and equipment. We review your records and make sure each claim is allowable.

Do I need to register as self-employed first?

Yes. You must register with HMRC by 5 October after the end of the tax year in which you started trading. We can handle the registration and help you get your UTR.

When is my sole trader tax return due?

Online returns for 2025/26 are due by 31 January 2027, and any tax owed is due on the same day. Paper returns were due by 31 October 2026.

Can you help if I have not kept good records?

Yes. Send us what you have, such as bank statements and invoices, and we will reconstruct your income and expenses in a form HMRC accepts.

Get your tax return filed, on time and stress-free

Fixed fee from £199 + VAT. Pay online, send your details and let our qualified accountants do the rest.