UK Self Assessment & Sole Trader Tax Guide 2025/2026: Dividends, Business Expenses & Ltd Taxes
Running a business in the UK—whether as a freelance sole trader, an e-commerce Amazon seller, or an incorporated Limited Company director—demands absolute clarity on tax deadlines, allowable expenses, dividend tax rates, and **HMRC Self Assessment** procedures.
1. Self Assessment Deadlines & Payments on Account
Register for Self Assessment by 5 October following your first business year.
- 31 January: Online tax return submission, final tax bill payment, and 1st Payment on Account (50%).
- 31 July: 2nd Payment on Account (50%).
2. Sole Trader Taxes & Class 4 National Insurance
Sole traders receive the £1,000 Trading Allowance. Profits above £12,570 attract 20% Income Tax and 6% Class 4 National Insurance.
3. Limited Company Corporation Tax & Dividend Tax Rates
Small companies pay 19% Corporation Tax up to £50k profit. Directors taking dividends benefit from a £500 Dividend Allowance, with remaining dividends taxed at 8.75% (Basic), 33.75% (Higher), or 39.35% (Additional).
4. Allowable Expenses & Pension Relief Strategies
Deduct qualifying business costs (software, equipment, travel, office space) and executive pension contributions to legally minimize taxable profits.