Key Structure Options in the UK
| Structure | Who uses it | Basic tax treatment | Liability & complexity | IR35 relevance |
|---|---|---|---|---|
| Sole Trader | Freelancers, consultants, small traders | Self Assessment; taxed on profits after expenses; NI Classes 2 & 4; no separate corporate tax | Unlimited liability; simpler accounting | Generally IR35 doesn’t apply, unless working via another entity |
| Partnership | Multiple individuals sharing profits | Profits allocated per partner; taxed via SELF Assessment with separate guidance; partners pay NI and tax | Joint liability; must file partnership returns; more complex bookkeeping | Again, less IR35 issues unless using intermediaries |
| Limited Company | Contractors, scale operations | Company profits taxed at Corporation Tax; salary + dividends for owners; possibly higher overall efficiency | Limited liability; higher setup and admin costs; incorporation filings, payroll, etc. | Crucial: if contracts are via the company, IR35/off-payroll rules can apply to contract terms and working practices |
Tax & Cost Implications
- Corporation Tax is lower than top rates of income tax + NI for dividend plus salary combos: using a company might reduce tax on marginal profits.
- Dividends are taxed separately, often with lower rates but no NICs for the dividend portion.
- Running costs (accounting, payroll, compliance) are higher for Limited Companies.
IR35, Off-Payroll, and Reporting Requirements
If you provide services via a personal service company to a larger client through an intermediary, IR35 rules may deem you an employee for tax and NICs, unless contract & behaviour pass the tests. Penalties for mis-classification can be serious.
Key compliance areas:
- Ensure contract terms and working practices align with “outside IR35” if you intend to be outside.
- Be aware of client assessment responsibilities if client is a medium or large business.
An Example Comparison
Emma is a web developer with £80,000 gross revenue:
- As a sole trader, she pays Income Tax at 20/40/45 % brackets, plus Class 2/4 NICs—profits taxed in full and with no distinction between salary and dividends.
- As a limited company, she can pay herself a small salary, take dividends for the rest; likely reducing NICs and saving tax. But she also has corporation tax, dividend taxes, must keep statutory filings and payroll.
- If she provides services via her company to a large client, the client needs to assess IR35 risk—if deemed “inside”, her company must pay worker-like taxes.
What’s New That Affects Entity Choices
- From Budget 2025, reforms mean that business property relief, agricultural property relief, and similar reliefs are being revised from 6 April 2026. These affect estate planning and asset-holding strategies used by entities. (assets.publishing.service.gov.uk)
- Consultation on tax treatment of reverse hybrids (such as US LLCs) and overseas entities may affect entities conducting international business. (gov.uk)
Checklist to Choose Wisely
- Estimate profits, cash needs, and personal income goals.
- Assess IR35 exposure based on clients & contracts.
- Consider future growth and whether you want to raise investment or scale up.
- Factor in non-tax costs like time, accounting, compliance.
- Review legal and estate implications—especially if intending to pass on or sell the business.
By selecting the right entity upfront—and keeping an eye on upcoming reforms—you can structure your operations in a tax-efficient, compliant way, avoiding surprises as your income, clients, or activities change.