Work · Practical guide

Starting a business in the UK: a practical first-steps guide.

Last verified: 1 November 2026· Based on GOV.UK, HMRC and Companies House· Next review 1 February 2027

The problem

You have an idea — selling food, cleaning, hair, tutoring, an online shop — but you are not sure whether you are allowed to, what it costs, or what to register with HMRC and Companies House. This guide takes you from idea to legally trading.

Applies to: UK-wide for tax and company registration. Licences, local rules and free support services differ between England, Scotland, Wales and Northern Ireland.

Read GOV.UK: Set up a business

The official starting point comparing sole traders and limited companies. Opens in a new tab.

What you need to know

  • Check your immigration permission first. Some visas do not allow self-employment — for example, GOV.UK says Student visa holders cannot be self-employed. Other visas have their own conditions.
  • Most businesses start as a sole trader or a limited company. You can change later; GOV.UK says it is usually easier to move from sole trader to limited company.
  • As a sole trader you can start trading straight away, but you must register for Self Assessment if you earn more than £1,000 in a tax year (6 April to 5 April).
  • A limited company is registered with Companies House. Registering online costs £100 and is usually done within 24 hours; directors may need to verify their identity first.
  • You must register for VAT if your taxable turnover goes over £90,000 in 12 months, or you expect it to in the next 30 days.
  • Some businesses need licences (for example selling food, alcohol, street trading or playing music), and you must have employers' liability insurance as soon as you employ someone.

Step by step

  1. 1

    Check you are allowed to run a business

    Look at the 'what you can and cannot do' section for your visa on GOV.UK and the conditions on your eVisa. If self-employment is not allowed, do not start trading — it can affect your future applications. If in doubt, get advice from a regulated immigration adviser.

  2. 2

    Test your idea before spending money

    Talk to at least 10 potential customers. Ask what they use now, what they pay, and what annoys them. Check local competitors and their prices. If you can, take a few real orders or bookings before buying stock or equipment.

  3. 3

    Work out your costs and prices

    List one-off costs (equipment, registration, website, first stock) and monthly costs (rent, phone, insurance, transport, software, materials). Set a price that covers costs and pays you. Keep separate personal emergency savings.

  4. 4

    Choose your business structure

    Sole trader: simplest, you keep the profits after tax but you are personally responsible for all business debts. Limited company: legally separate from you, liability limited to your investment, but more rules for accounts and taking money out. Partnership: you share responsibility and profits with partners.

  5. 5

    Choose a name and check it

    Sole traders can use their own name or a trading name. For a limited company, GOV.UK sets rules on names; search the Companies House register to check a name is not already used.

  6. 6

    Register with HMRC or Companies House

    Sole trader: register for Self Assessment once you earn more than £1,000 in a tax year — GOV.UK sets a 5 October deadline after the end of the tax year, and late registration can mean a penalty. Limited company: register with Companies House (£100 online), and you will usually be set up for Corporation Tax at the same time.

  7. 7

    Check licences, insurance and data rules

    Use the GOV.UK licence finder for your type of business and area. Get employers' liability insurance before anyone works for you. Consider public liability or other cover if clients or venues ask for it. If you handle customers' personal data, check the data protection rules, including whether you need to pay the ICO data protection fee.

  8. 8

    Set up records and a business bank account

    Keep every receipt and invoice from day one. A separate business bank account keeps your records clear and makes your tax return much easier. A limited company's money belongs to the company, not to you.

  9. 9

    Get free support

    In England, the Business Support Service gives free advice on 0800 998 1098 (Monday to Friday, 9am to 6pm). Scotland, Wales and Northern Ireland have their own services. A government-backed Start Up Loan of £500 to £25,000 is available if you meet the criteria — it is a personal loan you must repay.

Checks before you start trading

  • Immigration: your visa or status allows self-employment or running a business. (Student visa holders cannot be self-employed; the Innovator Founder visa is a separate route for people setting up an innovative business, with its own requirements.)
  • Tax: you know when to register for Self Assessment (sole trader) or Corporation Tax (limited company), and the £90,000 VAT threshold.
  • Licences: you have checked whether your activity needs a licence or permit from your council or another body.
  • Insurance: employers' liability insurance is in place before you employ anyone (at least £5 million cover from an authorised insurer).
  • Data: if you collect customers' personal information, you know how you will keep it safe and whether you must pay the ICO fee.
  • Start Up Loans: to apply you must live in the UK, be 18 or over, and have (or plan) a UK business that has been fully trading for less than 5 years.

Rules can change and depend on your situation. Confirm on the official page before acting.

Common mistakes and warnings

Trading when your visa does not allow it

Breaking your conditions can put your immigration status at risk. Always check first.

Buying stock or equipment before testing demand

Real conversations and a few early orders cost little and save you from expensive mistakes.

Missing the Self Assessment registration deadline

GOV.UK warns that registering after the 5 October deadline can lead to a penalty.

Mixing personal and business money

It makes records harder and can lead to errors on your tax return. For a limited company, the money belongs to the company.

Forgetting licences or insurance

Some activities are illegal without a licence, and employers can be fined £2,500 for every day they are not properly insured.

Paying for 'business registration' websites

Registering for Self Assessment with HMRC is free, and Companies House registration is £100 online direct from GOV.UK.

Frequently asked questions

Can I run a business while employed?

GOV.UK says you can be employed and self-employed at the same time. Check your employment contract and your visa conditions first.

I only earn a little from my side business. Do I need to register?

If your gross trading income is £1,000 or less in a tax year, the trading allowance means you may not need to tell HMRC. Above that, you must register for Self Assessment.

Sole trader or limited company — which is better?

Sole trader is simpler and how most people start. A limited company limits your personal liability but has more rules and costs. GOV.UK has a comparison table; an accountant can advise on your situation.

How much does it cost to register?

Registering for Self Assessment as a sole trader is free. Registering a limited company online with Companies House costs £100 (£124 by post). Licences, insurance and equipment costs vary by business.

Can I get a grant to start?

Grants are limited and vary by area. Ask the free business support service for your nation. Government-backed Start Up Loans are loans, not grants, at a fixed 7.5% interest rate.

Do I need an accountant?

It is not a legal requirement for most small businesses, but many people find one helpful, especially for a limited company.

Official resources

Verified official services. Each opens in a new tab — you choose when to go.

Next step

Ready to act on this?

Read GOV.UK: Set up a business

The official starting point comparing sole traders and limited companies. Opens in a new tab.

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Sources and last verified

Last verified 1 November 2026; next review 1 February 2027. This guide summarises:

MyAgumba explains official guidance in plain English. It is not legal, immigration, tax or financial advice, and MyAgumba is not part of, or endorsed by, the government. Always confirm the detail on the official page before acting.

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