Freelancers › United Kingdom
Freelancing in United Kingdom: forms and documents you need
Official starting points in United Kingdom for registering, paying tax and issuing invoices — and fillable freelancer templates that work in any country.
Official sources in United Kingdom
FormSphere does not resell official forms. These links go to the authority's own site, where the current version is published. Checked 2026-10-17.
- Set up as a sole trader (GOV.UK)Register as self-employed with HMRC
- Register for Self AssessmentReport your freelance income and pay tax
- Register for VATCheck when VAT registration applies
- Invoicing and taking paymentWhat to put on an invoice
- Set up a limited companyCompanies House registration
Good to know in United Kingdom
- Sole traders file a Self Assessment return for each tax year (6 April to 5 April).
- VAT registration is compulsory above a turnover threshold (GBP 90,000 at the time of writing); check the current figure on GOV.UK.
- If you work through your own company, check whether your contract falls inside the IR35 (off-payroll working) rules.
Six-step starter checklist
- 1. Choose how you will workDecide whether you work as a sole trader / self-employed person or through a company in United Kingdom. The official links above explain the options and what each requires.
- 2. Register your activityRegister with the business or trade register and the tax authority in United Kingdom if required. Do this before you send your first invoice.
- 3. Check tax and VAT / sales taxFind out when you must register for VAT or sales tax, how often you report income, and which social contributions apply to freelancers in United Kingdom.
- 4. Agree the work in writingUse a services agreement and, where the client shares sensitive material, an NDA. Fill in the governing law that applies to your deal.
- 5. Invoice correctlyCheck the mandatory content of an invoice in United Kingdom (numbering, tax IDs, VAT wording) and keep copies for the legally required period.
- 6. Track income, expenses and timeA simple timesheet and monthly income and expense tracker make tax time and client disputes much easier.
Freelancer Kit documents to start with
Original, country-neutral templates. Set the governing law to United Kingdom (or the client's country) and add your tax details.
Questions
Do I need a written contract as a freelancer in United Kingdom?
A written agreement is widely used because it records scope, price, deadlines and who owns the work. Whether specific clauses are required depends on the law in United Kingdom and on your client, so check the rules that apply to you.
Are the FormSphere templates legal advice?
No. They are general-purpose, country-neutral templates. You choose the governing law, currency and tax wording. For anything important, ask a qualified adviser in your country.
Does FormSphere sell official government forms?
No. For official registration and tax forms in United Kingdom this guide links to the authority's own site, where the current version is published.
Can I fill the documents in without printing?
Yes. The Freelancer Kit documents are fillable AcroForm PDFs that work in a normal PDF reader.
Other country guides
This guide is a starting point, not legal or tax advice. Rules change; check the authority's current page before acting.