Starting a small business in the UK is more achievable than most people think. The legal and administrative steps are straightforward the harder part is making the right decisions early on. This guide walks you through everything you need to do, in the right order.
Step 1: Choose Your Business Structure
Your first decision is how to structure your business legally. In the UK, the main options are:
Sole trader the simplest option. You register with HMRC, file a self-assessment tax return each year, and keep all profits after tax. You're personally liable for any business debts.
Limited company more admin upfront, but you become a separate legal entity from your business. Directors take a salary and dividends, which can be more tax-efficient above ~£30,000 profit. Liability is limited to what you've invested.
Partnership suitable if you're going into business with someone else. Both partners share profits and liabilities. A limited liability partnership (LLP) is an alternative with reduced personal risk.
For most people starting out, sole trader is the right call. It's fast, free, and low-maintenance. You can always convert to a limited company later.
Step 2: Register Your Business
As a sole trader: Register with HMRC for self-assessment. You must do this by 5 October in the second year of trading. Registration is free and takes around 10 minutes at gov.uk.
As a limited company: Incorporate at Companies House. This costs £12 online and can be done same-day. You'll also need to register for Corporation Tax within 3 months of starting to trade.
VAT registration: Mandatory once your turnover exceeds £90,000 in any rolling 12-month period. You can register voluntarily before this threshold, which can be beneficial if your clients are VAT-registered businesses.
Step 3: Open a Business Bank Account
Keep personal and business finances separate from day one. It makes accounting cleaner, looks more professional to clients, and is required if you're a limited company.
Many UK banks offer free business accounts for the first 12–24 months. Options include Starling, Monzo Business, Tide, and Revolut Business all of which have strong app-based tools for managing cash flow and invoicing.
Step 4: Sort Your Insurance
Most client-facing businesses need insurance before they start trading. Key types include:
- Public liability insurance covers injury or property damage to a third party. Essential for tradespeople, event businesses, and anyone working on-site at clients' premises.
- Professional indemnity insurance covers claims of negligence or errors in advice/work. Required for consultants, designers, accountants, and similar.
- Employers' liability insurance legally required if you employ anyone, even part-time.
Step 5: Set Up Your Financial Admin
Get ahead of your accounting from day one. Key requirements:
- Self-assessment sole traders file annually by 31 January. You'll need to track income and allowable expenses throughout the year.
- Making Tax Digital (MTD) from April 2026, all self-employed people earning over £50,000 must use MTD-compatible software to submit quarterly updates to HMRC. Tools like FreeAgent, QuickBooks, and Xero all support this.
- Record keeping HMRC requires you to keep business records for at least 5 years (sole trader) or 6 years (limited company).
Step 6: Build a Web Presence
A professional website is no longer optional for a UK small business. Most customers search online before contacting a business if you're not findable, you're losing work to competitors who are.
At minimum, you need:
- A website with your services, location, and contact details clearly stated
- A Google Business Profile free, and critical for local search visibility
- Social media presence on whichever platform your target customers use most
If you're starting from home, make sure your website copy is clear about where you serve and who you serve this helps with local SEO.
Step 7: Price Your Services Correctly
One of the most common mistakes new business owners make is undercharging. Research market rates, factor in your overhead (even if minimal), account for unpaid admin time, and make sure your prices leave room for tax.
A rough guide: if you're a sole trader targeting £30,000 net income and billing 20 chargeable hours per week, you need to charge at least £38/hour and that assumes 100% utilisation, which is unrealistic. Most experienced freelancers build in a 30–40% buffer.
Step 8: Get Your First Clients
For most service businesses, your first clients come from:
- Your existing network former colleagues, employers, family contacts
- Local business networking events, groups like BNI, Chamber of Commerce
- Google and local SEO if you invest early in your website and Google Business Profile
- Referrals the most reliable long-term source, built by doing good work
Resist the urge to spend on paid advertising before you've validated your offer and pricing with organic channels.
Running a Small Business in the UK: Ongoing Responsibilities
Once trading, your ongoing obligations include:
- Filing your annual self-assessment or company accounts
- Paying income tax and National Insurance contributions
- Renewing insurance annually
- Keeping financial records up to date
- Staying compliant with any sector-specific regulations
Can You Start a Small Business from Home in the UK?
Yes and many of the UK's most successful businesses started this way. You may need to check your mortgage or tenancy agreement, and inform your insurer. Some councils require planning permission if your home use changes significantly, though most home-based businesses are exempt.
Final Thought
The hardest part of starting a small business isn't the admin it's finding your first paying customers and building enough confidence in your offer to charge appropriately. The legal and structural steps are straightforward once you take them one at a time.
If you need a professional website to launch your business, Elendil Studio builds fast, conversion-focused websites for UK small businesses. Get a free quote.