Operating Through a Limited Company as a Finance Contractor: A Practical Guide

Why Finance Contractors Use Limited Companies

For contractors working outside IR35, operating through a personal service company (PSC) — a limited company owned and run by the contractor — is typically the most tax-efficient structure. The key advantage: rather than taking all income as salary (subject to income tax and National Insurance at employee and employer rates), you can pay yourself a combination of a low salary (below the NI threshold) and dividends, which are taxed at lower rates and attract no National Insurance.

Setting Up Your Limited Company

Incorporation through Companies House costs £12 online and takes 24 hours. You will need a company name, a registered address (can be your accountant's address), and at least one director and one shareholder (typically the same person — you). Open a business bank account immediately — never mix business and personal finances. Register for VAT if your turnover will exceed £90,000 in a 12-month period (or consider voluntary registration earlier).

Tax-Efficient Pay Structure (Outside IR35)

The most tax-efficient approach for a contractor outside IR35 in 2025/26: pay yourself a salary at the National Insurance Secondary Threshold (£5,000/year from April 2025, reduced from £9,100 in the October 2024 Budget) — this minimises employer NI. Many contractors instead pay up to the Primary Threshold (£12,570) to maximise State Pension credit, accepting a small employer NI cost on the difference. Take remaining profits as dividends — taxed at 8.75% (basic rate), 33.75% (higher rate), or 39.35% (additional rate) on amounts above the £500 dividend allowance. Compare this to salary, which attracts income tax at 40% above £50,270 (or 20% below) plus employee NI at 8% on earnings between £12,570 and £50,270, then 2% above the Upper Earnings Limit.

IR35 Considerations

If your contract is determined to be inside IR35 by your client (as required for medium/large clients since April 2021), your net income from that contract is taxed as employment income regardless of your company structure. In this case, the limited company provides little tax advantage and many contractors use an umbrella company for inside-IR35 contracts instead. Working through multiple clients simultaneously reduces IR35 risk by demonstrating genuine business independence.

Accounts and Compliance

As a limited company director, you must file annual accounts with Companies House, submit a Corporation Tax return to HMRC, and file a personal Self Assessment return. Most contractors use a specialist contractor accountant (typically £80-£150/month) — the tax saving from proper structuring far exceeds the accountancy fee.

Further Reading

• Finance Contracting Guide
• Salary Negotiation Guide
• CPD for Finance Professionals

Study with Learnsignal: Keep your skills sharp and CPD up to date between contracts. Browse CPD courses.