Business in the UK for Expats: Tax Rules and HMRC Basics

Starting a business in the UK offers expats access to a stable economy, global market reach, and a business-friendly environment. However, navigating the tax rules and HMRC (HM Revenue and Customs) requirements can feel overwhelming for non-residents or those relocating. This comprehensive guide covers everything expats need to know about business in the UK for expats: tax rules and HMRC basics in 2026. Whether you’re setting up a limited company, operating as a sole trader, or managing a non-resident structure, understanding Corporation Tax, VAT, residency rules, and compliance is essential to avoid penalties and optimise your finances.

With the right knowledge, expats can turn the UK into a tax-efficient base for growth. This article breaks down the key steps, obligations, and tips tailored for international entrepreneurs.

Why Expats Are Choosing the UK for Business Opportunities

The UK remains a top destination for expat business owners thanks to its innovation hubs, access to talent, and straightforward (though detailed) regulatory framework. London, Manchester, and Edinburgh attract founders from Europe, Asia, the Middle East, and beyond. Post-Brexit adjustments and digital tools from HMRC have made remote compliance easier than ever.

Key benefits for expats include:

• Strong legal protections and intellectual property rights.
• Access to grants, R&D tax credits, and Enterprise Investment Schemes.
• English-language operations and common-law system familiar to many international investors.

Yet challenges exist. Expats must understand UK tax residency, permanent establishment (PE) risks, and HMRC filing deadlines. Non-compliance can lead to fines, while smart planning—using the Statutory Residence Test and double-taxation agreements—can minimise liabilities.

In 2026, recent changes like the Foreign Income and Gains (FIG) regime (replacing the old non-dom rules from April 2025) and phased Making Tax Digital (MTD) for Income Tax add new layers. Expats who stay informed gain a competitive edge.

Choosing the Right Business Structure for Expats

Selecting the correct structure is the foundation of compliant and tax-efficient operations. Expats typically choose between sole trader, limited company, or operating as a non-resident entity.

Sole Trader vs Limited Company: Which Fits Your Expat Business?

Sole trader (self-employed) is the simplest option. You trade under your own name or a trading name, with full personal liability. Ideal for freelancers, consultants, or low-risk startups. No registration with Companies House is needed—you simply register for Self Assessment with HMRC if your profits exceed £1,000 in a tax year (6 April to 5 April).

Limited company offers limited liability and looks more professional for scaling. You register with Companies House, and the company is a separate legal entity. Expats often form a UK Ltd company even if living abroad, provided they appoint a UK director or use formation agents. This structure suits e-commerce, tech, or service businesses aiming for investment.

Other options include partnerships or registering an overseas company if you maintain a UK place of business (via form OS IN01 within one month). Non-resident companies without a UK base may still need to register directly with HMRC for Corporation Tax if they have a permanent establishment.

Pro tip for expats: A UK limited company can create a PE, triggering UK Corporation Tax on attributable profits. Consult a tax advisor early to assess your setup.

Registering Your Business with HMRC: Step-by-Step Guide

HMRC registration is mandatory for tax compliance. Most expats handle this online via the Government Gateway.

How to Register as a Sole Trader or Self-Employed Expat

1. Check if you need to register (profits over £1,000).
2. Create a Government Gateway account.
3. Complete Self Assessment registration—HMRC issues a Unique Taxpayer Reference (UTR).
4. Keep records of income and expenses from day one.

You can start trading immediately; registration follows within the tax year.

Registering a Limited Company or Non-Resident Entity

• UK companies: Automatic Corporation Tax notification via Companies House.
• Non-resident companies: Register separately with HMRC if trading through a UK PE, dealing in UK land, or disposing of UK property. HMRC sends a UTR by post (15 working days processing + delivery time). Then activate online services and add Corporation Tax.

Expats living abroad should provide an overseas address—delays are common, so apply early. Voluntary registration for VAT is possible below thresholds to reclaim input VAT.

Key Tax Rules Every Expat Business Owner Must Know

UK businesses face several taxes. Understanding rates and triggers prevents surprises.

Corporation Tax: Rates and Payment Basics in 2026

Corporation Tax applies to limited companies and certain non-resident entities on profits.

• Small profits rate: 19% on profits up to £50,000.
• Main rate: 25% on profits over £250,000.
• Marginal relief: Applies in between for a blended rate.

Non-resident companies pay only on UK-source profits attributable to a PE. File returns and pay nine months after your accounting period ends. R&D relief and capital allowances can reduce the bill significantly.

VAT Rules for Expats and Non-UK Businesses

The standard VAT rate is 20%. Register if your taxable turnover exceeds £90,000 in any 12-month period (or expect to in the next 30 days). Non-UK established businesses must register from their first taxable supply to UK customers—no threshold applies for overseas sellers making B2C sales.

Voluntary registration allows reclaiming VAT on business purchases. File quarterly or annually via MTD-compliant software. Penalties apply for late registration.

Income Tax, National Insurance, and Personal Taxes for Sole Traders

Sole traders pay Income Tax on profits (after £12,570 personal allowance in 2025/26) at 20% basic rate, 40% higher, and 45% additional. Class 2 and Class 4 National Insurance Contributions (NIC) apply, with employer NIC at 15% from £5,000 (if hiring staff).

Expats who are UK tax resident pay on worldwide income; non-residents only on UK sources.

Capital Gains Tax and Other Considerations

CGT applies to asset disposals. Business Asset Disposal Relief offers reduced rates for qualifying gains, though rates are rising post-2025. Double-taxation treaties (over 100 countries) prevent double taxation—claim relief via Self Assessment.

Tax Residency and the Statutory Residence Test (SRT) for Business Owners

Residency determines whether you’re taxed on worldwide or UK-only income. The Statutory Residence Test uses automatic tests, day counts, and “ties” (family, work, accommodation).

• Automatic UK resident: 183+ days in the UK, or full-time UK work.
• Ties test: UK ties (home, family, work) combined with days spent (e.g., 91–120 days with 3+ ties = resident).

Expats returning or splitting time must track days carefully. The FIG regime offers qualifying new residents relief on foreign income and gains for their first four years (from April 2025).

Permanent establishment risk: Hiring UK staff or maintaining a UK office can create a PE, exposing overseas companies to UK Corporation Tax.

HMRC Compliance, Deadlines, and Avoiding Common Pitfalls

HMRC expects timely filing via online portals. Key deadlines:

• Self Assessment: 31 January following the tax year (online).
• Corporation Tax: 12 months after accounting period end for filing; payment nine months after.
• VAT: Monthly or quarterly returns.

Making Tax Digital phases in quarterly updates for many sole traders and landlords from April 2026. Late filing incurs penalties starting at £100, escalating with delays.

Common expat mistakes:

• Ignoring PE rules when scaling UK operations remotely.
• Failing to register for VAT as a non-UK seller.
• Poor record-keeping (HMRC requires six years of records).
• Missing double-tax relief claims.

Use HMRC’s online services, apps, and webinars. Many expats hire UK accountants familiar with cross-border rules.

Recent UK Tax Changes Affecting Expats (2025–2026)

• Abolition of remittance basis and introduction of FIG regime for new arrivals.
• Employer NIC increases and threshold changes.
• Business rates reforms and R&D relief adjustments.
• Continued push toward digital compliance.

These updates reward proactive planning. Expats using the four-year FIG relief or optimising corporate structures can achieve significant savings.

Professional Help and Next Steps for Expats

While this guide covers HMRC basics and tax rules, every situation is unique. Engage a UK-qualified accountant or tax advisor specialising in expat businesses. They can handle registrations, optimise structures, and represent you with HMRC.

Resources:

• GOV.UK business and tax sections.
• HMRC helplines and webinars.
• Double-taxation agreement lists.

Starting a business in the UK as an expat is rewarding when tax rules are mastered. Register early, maintain records, and stay compliant—your UK venture can thrive globally.