Sole Trader vs Limited Company 2026/27 — Tax & Pay

Choosing between being a sole trader and operating through a limited company is one of the biggest tax decisions a freelancer makes. For 2026/27 sole traders pay Income Tax plus Class 4 National Insurance on taxable profits, while a limited company pays Corporation Tax at 19–25% and the owner may pay employment or dividend tax when value is extracted. There is no universal profit level at which incorporation wins: salary, employer NI, Employment Allowance eligibility, pension contributions, extraction timing, accounting costs and IR35 can all change the result. Compare your own figures with the Salary vs Dividend Calculator→.

This guide compares the tax bills at different profit levels, the optimal director's salary, and the IR35 rules that can remove the advantage entirely.

The Two Tax Stacks

Corporation Tax is generally 19% for profits at or below the small-profits threshold and 25% at or above the main-rate threshold, with marginal relief between them. The thresholds can be divided where associated companies apply. A company structure can defer personal tax until money is extracted, but it also creates company filing, payroll, accounting and legal duties.

Worked Example — £60,000 Profit

Sole trader: the result depends on allowable expenses, other income, pension contributions and the tax rules that apply to the taxpayer. A simple rUK calculation with £60,000 of taxable profit, no other income and the standard Personal Allowance can illustrate the mechanics, but should not be presented as a universal bill.

Limited company: a £12,570 salary may use the Personal Allowance and avoid employee NI in some circumstances, but it is not automatically free of employer NI. For 2026/27, the standard employer Secondary Threshold is £5,000 and the employer rate is generally 15%, before considering Employment Allowance, director rules and other reliefs. The Corporation Tax and dividend calculation also depends on deductible costs, associated companies, accounting period, distributable profits, available allowances and the shareholder’s other income. This is why a company comparison must show assumptions rather than promise a saving.

The Director's Salary vs Dividends

There is no standard contractor salary that is optimal for every company. A director may compare salary, employer pension contributions and dividends, but the result depends on employer NI, Employment Allowance, the company’s distributable profits, the dividend allowance and the shareholder’s tax bands. Dividends do not attract National Insurance, but they cannot be paid unless the company has sufficient distributable profits and they are not a substitute for payroll or employment-law compliance.

Higher Profits and Retained Earnings

At £100,000 of profit the picture shifts. The sole trader’s Income Tax and Class 4 NI depend on the exact allowances and rates for the year. The company pays Corporation Tax, and extracting the rest as dividends can push the shareholder into the 35.75% higher dividend rate for 2026/27. Retaining profits may defer personal tax, but it does not make the company universally better: the result depends on whether the money is retained, later extracted, or used for genuine business purposes.

IR35 — The Off-Payroll Rules

If you work through a company but would be an employee without it, the off-payroll rules may apply. For a medium or large private-sector client, the client usually determines status and must account for PAYE where the rules apply; for a small private-sector client, the worker's intermediary generally determines status and operates the relevant rules. The calculation is not simply a universal “deemed salary”, and employer NI, allowable expenses and statutory deduction rules matter. Outside IR35, the company structure may offer more flexibility, but it does not guarantee a tax advantage.

Admin and Risk Differences

When to Incorporate — Practical Timelines

Incorporation is fast and cheap at the point of formation, but the ongoing obligations arrive immediately: confirmation statements, company accounts, payroll and a business bank account, none of which a sole trader faces in the same way. There is no reliable universal break-even. Retaining profits can defer personal tax, but the company still has filing, accounting, payroll and legal duties; extracting all profits can produce a different result from leaving money in the company. Compare the complete cash flow and obtain tailored advice before incorporating.

Switching later is common and generally painless if handled properly: incorporate and transfer the trade, close the sole-trader Self Assessment, and file company accounts from then on. The main cost is CGT on assets transferred to the company — goodwill, equipment or stock can be treated as a disposal at market value, which is why most people use an accountant for the transfer. Switching the other way, from company back to sole trader, involves extracting or closing the company with corporation tax on retained profits and potentially capital distributions taxed as dividends. The structure decision is not permanent, but every switch has a price, so it pays to model your likely profit path for the next few years rather than react annually.

Frequently Asked Questions

Evidence and decision checks

A reliable self employed vs limited company 2026 27 review starts by fixing the tax year and the date on which the relevant event happened. Record the person's or business's status, the income or transaction category, the amount before tax, tax already withheld, and any election or claim being relied on. Do not combine a headline figure with a final liability: the result can change when another income source, a payment date, an ownership interest or a qualifying condition is added.

Keep the source documents behind every important input. Depending on the subject, that may include payslips, invoices, bank statements, contracts, provider statements, travel records, HMRC notices, payroll submissions, valuations or correspondence. Where an amount is apportioned, write down the method and retain the underlying total. If a correction is made, preserve the original figure and explain the reason, date and evidence for the replacement.

Before relying on the result, check the current official guidance for the same tax year and jurisdiction. Distinguish enacted law from a consultation, draft measure, announcement or future proposal, and record the effective date. Reconcile the final estimate to the relevant return, payroll record or HMRC account. A calculator or explanatory guide can support a decision, but it cannot replace the eligibility test or the official filing and payment process.

Compare both structures on your own numbers with the Salary vs Dividend Calculator→, then read the IR35 Off-Payroll guide if you work through a company, and the Dividend Allowance guide for the extraction rules.

Official sources

• GOV.UK: Income Tax rates and allowances
• GOV.UK: Corporation Tax rates and allowances
• GOV.UK: tax on dividends
• GOV.UK: National Insurance rates and allowances
• GOV.UK: set up a private limited company
• GOV.UK: off-payroll working rules
• GOV.UK: Employment Allowance
• GOV.UK: pension scheme rates 2026 to 2027

These GOV.UK sources are the official references for Income Tax, Corporation Tax, dividends, National Insurance, incorporation, IR35, Employment Allowance and pension assumptions discussed here.