Founders think working out the cost to start a business in the UK is the hard part. It isn't. The real problem comes after: missed tax filings, funding that dries up faster than expected, compliance deadlines nobody warned you about, and hidden monthly costs that stack up silently.
This guide walks through every expense you'll actually face in year one from incorporation to insurance to the first-year budget that keeps you alive until revenue kicks in so you can build a realistic plan before you incorporate.
The £50 Myth vs the Real Number
The cost to start a business in the UK is far more than incorporation alone. Yes, you can register a limited company for £100 with Companies House (it was £50 until 1 February 2026, but fees doubled). But registration is only one piece of the puzzle. Startup costs UK also include accounting, software, insurance, banking, compliance, and the monthly expenses required to keep the business running after incorporation.
The real cost to start a business in the UK breaks into three categories: one-off setup costs (£1,000–£3,000 for most founders), recurring monthly expenses (£300–£1,000+ depending on your team and sector), and compliance obligations that continue long after incorporation. For most founders, these expenses extend far beyond registration fees and become a mix of setup costs, operating costs, and regulatory requirements that need budgeting from day one.
Here's what founders actually spend: A lean solo founder launching a digital product might bootstrap for under £2,000. A small team startup with basic infrastructure budgets £8,000–£15,000 for year one. The difference isn't the idea, it's the burn rate and how long you need to reach revenue.
One-Off Setup Costs: The Immediate Bills
The cost to start a business in the UK begins the day you incorporate. These initial costs break down into four categories: company formation, banking, accounting setup, and essential tools before you take your first pound of revenue.
Company Incorporation: £100 digital registration via Companies House (as of February 2026). Same-day costs £156 if you need it immediately. This covers your Certificate of Incorporation legally, you're now a limited company. Formation agents can handle this for an additional £10–£100 if you want hands-off setup, though most founders handle it directly.
Business Bank Account: Free to set up. Traditional banks like Lloyds, Barclays, and Bank of Scotland offer no setup fees, though some charge £8.50/month after the first year. Digital banks like Monzo Business offer completely free accounts with no monthly fees. You need one; it's a legal requirement for limited companies and essential for separating business and personal finances for tax purposes.
Accounting & Tax Setup: First-year accounting costs range from £600–£2,500 depending on complexity. A sole trader managing their own books might spend £150–£350 on annual Self Assessment. A small limited company using accountant support budgets £300–£400/month or a flat £600–£1,200/year. If you're bootstrapping, free tools like Wave or Zoho Books (free tier) help you DIY initial bookkeeping.
Domain & Website: Domain registration costs £5–£50/year (most .co.uk domains are £5–£15). Basic web hosting runs £2.43–£13.99/month. Many providers bundle email hosting free. For a simple single-page site or landing page, you're looking at £50–£200 setup plus £30–£150/year recurring.
Workspace & Equipment: Home-based founders may spend nothing initially, while those buying equipment should budget £500–£2,000.
Total one-off startup costs UK: £1,000–£3,500 for most founders.
Recurring Monthly Costs: The Burn Rate
How much to start a limited company is only half the story. What separates founders who survive year one from those who don't is understanding the recurring costs that drain your runway whether or not you're making revenue yet.
Accounting & Bookkeeping: £50–£150/month for DIY with software, or £300–£400/month for accountant support. If you're hiring an accountant, expect additional fees for VAT compliance (£400–£1,200/year once you're VAT-registered) and payroll (£30–£80 per employee per month).
Business Banking: £0–£10/month depending on your bank. Most free accounts remain free, though transaction costs apply (cash deposits at digital banks often cost £1+ per £100 deposited).
Software & Tools: Accounting software (£10–£39/month), email/productivity tools (often bundled free with hosting), project management, CRM, and analytics. A typical SaaS founder budgets £100–£300/month for a basic stack.
Insurance: Annual cost split across months. Public liability runs £50–£500/year (budget £100/year as a baseline). If you're hiring, employers' liability is mandatory at £90+/employee/year. Professional indemnity (if relevant) costs £50–£1,000+/year depending on sector.
Workspace: If you're paying for a desk or office, this becomes your largest recurring cost (£200–£1,000+/month depending on location and setup).
Marketing & Customer Acquisition: Most early-stage founders spend £0–£500/month until they find product-market fit.
Total monthly for a solo founder: £500–£1,000.
Total monthly for a small team: £3,000–£10,000 (heavily driven by salaries).
When founders ask how much to start a limited company, these recurring costs are often the missing piece.
Compliance & Legal Costs: The Hidden Obligations
Sector-specific regulations add significant layers to how much to start a limited company in the UK.
General Compliance: All limited companies must file a Confirmation Statement annually (£50 from February 2026). First accounts are due 21 months after incorporation, then 9 months after your year-end annually. Failure to file costs penalties and potential strike-off.
Making Tax Digital (MTD) kicks in 6 April 2026 for sole traders and landlords earning over £50,000 quarterly digital reporting is mandatory. Software to support MTD adds £20–£50/month if your current accountant or tool doesn't already support it.
Fintech Startups: If you're handling payments or e-money, FCA compliance runs £20,000–£40,000 upfront just for regulatory reporting setup. GDPR compliance (mandatory regardless of sector, but more complex in fintech) adds £15,000–£25,000. Banking API integration costs £8,000–£70,000 depending on complexity. Ongoing compliance costs run 5–10% of revenue, a structural cost that doesn't go away.
Healthcare/Medtech: CQC registration costs £1,522 in application fees alone. Total care sector startup compliance runs £6,350–£16,650. You'll need a Clinical Safety Officer (hire or contract) and multi-regulator oversight (CQC, MHRA, ICO for GDPR).
AI Startups: No standalone AI legislation exists yet, but existing laws apply hard. GDPR compliance is mandatory. If you're handling automated decision-making, ICO guidance requires detailed documentation and fairness testing costs vary but budget £5,000–£15,000 for initial compliance build.
A Sample 12-Month Budget for a Lean Startup
Here's what typical startup costs UK look like for a solo founder or two-person team over twelve months:
If you're paying yourself a modest salary (£20,000/year) or a co-founder (£30,000), add that on top. A two-person team earning £25,000 each would add £50,000/year.
Reality check: Most bootstrapped founders spend £5,000–£15,000 in year one before salaries, then burn £2,000–£5,000/month operating costs. Venture-backed startups spend far more (£300,000–£500,000+ in year one once salaries are included).
Sector Add-Ons: Where Costs Explode
Fintech — Add £35,000–£80,000 for FCA compliance, legal setup, banking integrations, and regulatory consultation.
AI — Add £10,000–£20,000 for data governance, model documentation, fairness testing, and GDPR audit.
Healthcare — Add £10,000–£30,000 for CQC registration, clinical governance, and regulatory consultation.
FAQs
1. Is £50 really all it costs to start a UK company?
No. The £50 Companies House fee (now £100 as of February 2026) covers digital registration only. You still need accounting software, a business bank account, insurance, domain registration, and compliance infrastructure. Most founders spend £2,000–£5,000 minimum in year one before revenue.
2. What are the hidden costs of starting a startup in the UK?
The biggest hidden cost: compliance deadlines you miss. Confirmation Statement filing, VAT registration thresholds, payroll PAYE registration, Making Tax Digital reporting, and annual accounts filings all have hard deadlines with penalties for lateness. Factor in accountant fees that jump once you hit turnover thresholds, sector-specific licensing, and cash flow gaps between paying suppliers and getting paid by customers.
3. How much should a startup budget for its first year?
Budget 6 months of operating costs as a minimum runway (3 months if you're capital-efficient and planning to hit revenue fast). For a solo founder, that's £10,000–£20,000. For a small team of 3–5 people, budget £50,000–£150,000. Founders who underestimate startup costs UK usually don't run out of ideas, they run out of cash before reaching sustainable revenue. Add another 20% contingency for unexpected costs like professional fees, tax adjustments, or regulatory changes.
Conclusion
The real cost to start a business in the UK depends on your model, team, and sector. But one pattern is universal: founders underestimate burn and miss compliance deadlines. Budget for twelve months before you incorporate, calendar your filings on day one, and you'll survive.
Sources: Based on current Companies House fee schedules (February 2026), HMRC Making Tax Digital guidance, FCA regulatory requirements, CQC registration procedures, and verified UK accounting, banking, and insurance provider pricing as of June 2026.
