The SA103 form is the document you need to complete so you can pay tax on income from self-employment.
There are two kinds of SA103:
It’s not always as easy as it sounds:
Also, in case you’re wondering: “sole trader” is the same as “self employed”.
You can get the “shorter” SA103S form from this HMRC page:
If you file a Self Assessment tax return every year, then HMRC might also send it to you.
In any case, make sure you first read the “Self-employment (notes)” pdf for that tax year – it’s on the same HMRC page.
It will explain what each line item on the form means, and how to fill it.
If you want the full version, download the SA103F form here instead.
You need to send it together with your SA100 form – you can’t file the SA103 by itself.
No, you need to send it by post.
The good news is that you can simply choose to do your entire Self Assessment online. Plus you can get another 3 months to do it, since the deadline for sending the paper form is October 31st, but for online tax returns is 3 months later (end of January).
At TaxScouts we can file your tax return online for you instead – and for a flat £119, regardless of how many sources of income you have or what kind of self-employed you are.
Get your self assessment prepared for you online by certified accountants for £119
Our online tax-bot will go over your tax situation and will make sure you won’t overpay your taxes.
You can talk to one of our tax assistants at any time during the process when you have any questions.
We’ll tell you exactly what documents you need and sort them for you online. You just upload them or snap a picture with your phone.
Your certified accountant will go over your details & prepare your tax return for you to review. It will be filed on your behalf once you approve it.
We have a simple online service that guides you through the entire process. Regardless of your reasons for doing your tax return we'll help you get it done right.
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At TaxScouts we appreciate that tax returns are highly individual. Before you get assigned an accountant we make sure to understand your circumstances and help you build your optimal tax profile.