Sole Trader or Limited Company, Which Is Right for Your Business?
Overview
There is no single profit level at which becoming a limited company automatically saves tax. The right structure depends on how much you earn, how much you need to take out of the business, your other income, future plans and the additional cost of running a company.
This guide explains the main differences and the checks to make before incorporating. Tax figures relate to 2026/27, reviewed on 13th October 2026. Examples are illustrative and are not a substitute for a personalised comparison.
How sole traders are taxed
A sole trader generally pays Income Tax and Class 4 National Insurance on taxable business profits, whether the money is withdrawn or left in the business.
For 2026/27, the standard Personal Allowance is £12,570. In England, Wales and Northern Ireland, the main Income Tax rates on business profits are 20%, 40% and 45%. With the full allowance, the higher-rate band starts above £50,270 total income. Scottish Income Tax rates and bands differ.
The Personal Allowance reduces by £1 for every £2 of adjusted net income above £100,000, reaching zero at £125,140.
Class 4 National Insurance is normally:
6% on profits above £12,570 up to £50,270.
2% on profits above £50,270.
Other income, reliefs, age and personal circumstances can change the calculation.
How limited companies and directors are taxed
A limited company is a separate legal entity. It normally pays Corporation Tax on taxable profits, while its directors and shareholders may pay personal tax on salaries, dividends and benefits.
The usual Corporation Tax rates are:
19% for qualifying profits of £50,000 or less.
25% for profits above £250,000.
The main rate reduced by Marginal Relief between those limits, where eligible.
The limits are reduced for short accounting periods and associated companies. Not every company qualifies for the small profits rate or marginal relief.
Dividends are paid from available distributable profits after Corporation Tax. They do not reduce the company's taxable profits. In 2026/27, dividend tax rates are 10.75%, 35.75% and 39.35%, depending on the shareholder's tax band, with a £500 dividend allowance.
Salary may be deductible for the company, but PAYE and National Insurance must also be considered. Standard employer National Insurance is 15% above the £5,000 annual secondary threshold. Employment Allowance can help eligible employers, but a company with one director who is its only employee liable for employer National Insurance cannot claim it.
The company bank account is not the director's personal wallet. Money must be withdrawn and recorded appropriately.
Is there a profit threshold for incorporation?
Rules of thumb such as “incorporate at £50,000” are not reliable on their own. A company may suit a business with lower profits for commercial reasons, while a profitable sole trader who needs to withdraw everything may find incorporation produces little or no tax saving.
The main questions are:
How much cash do you need personally each year?
Can you leave profits in the company for investment or future use?
Are employer pension contributions suitable and affordable?
What other income do you have?
What additional accounting, payroll, software and filing costs will arise?
Are there commercial, contractual or liability reasons for using a company?
Retaining profits can defer personal extraction tax, but company cash is not personal take-home pay. Tax may arise when those profits are withdrawn later.
A realistic tax comparison
The following illustration uses 2026/27 rules for an owner in England, Wales or Northern Ireland who withdraws all available profit.
It assumes one shareholder/director, no other income, a full Personal Allowance, a £12,570 director salary, no Employment Allowance, no pension contributions or other special reliefs, and no associated companies. Profits are after ordinary business expenses but before the owner's salary and employer NI. Additional company administration costs are excluded. The salary is an example, not a universal recommendation.
£50,000 - Approximately £40,268- Approximately £38,862-
£80,000- Approximately £57,711- Approximately £55,765
In these examples, the company leaves approximately £1,406 less personal cash at £50,000 profit and £1,947 less at £80,000, before any extra company costs.
Different salaries, eligible Employment Allowance, retained profits, pensions or personal circumstances can change the result. This is why incorporation should be based on a tailored calculation, not promised savings.
What additional costs and responsibilities arise?
Company directors must maintain records, prepare and file company accounts and tax returns, and submit confirmation statements. Payroll and VAT obligations apply where relevant. Appointing an accountant does not remove the director's legal responsibilities.
Current Companies House fees include:
£100 for online incorporation.
£50 for the first online or software confirmation statement in each 12-month payment period.
Paper filing fees differ. Obtain a written quote for accountancy, tax preparation, payroll and software so the comparison includes the actual additional costs.
Non-tax reasons to incorporate
A company can provide a clear ownership structure, support investment through shares and meet some customers' contracting requirements. It may also offer useful pension and succession-planning options, subject to advice.
Limited liability generally separates company debts from its owners, but it is not absolute. Personal guarantees, misconduct and certain tax or insolvency rules can expose directors or shareholders to personal liability. Incorporation also does not guarantee better credibility or make every business easier to sell.
Making Tax Digital for Income Tax
Making Tax Digital for Income Tax started on 6th April 2026 for eligible sole traders and landlords whose qualifying income exceeded £50,000 in 2024/25, subject to exemptions.
The threshold concerns combined gross self-employment and property income before expenses, not net profit. Later starting points are 6th April 2027 for qualifying income over £30,000 in 2025/26, and 6th April 2028 for qualifying income over £20,000 in 2026/27.
A company's profits are outside Income Tax MTD, but incorporating does not automatically remove personal obligations for other qualifying income or the final sole-trader period. Avoid choosing a company solely to avoid digital reporting without comparing its own compliance burden.
How to switch from sole trader to limited company
Compare the options. Forecast profits, personal drawings, taxes, pensions and costs. You do not need to exceed £50,000 before considering incorporation.
Plan the transfer. Review assets, stock, contracts, debts, employees, insurance, licences and VAT. Agree a transfer date and obtain advice on Capital Gains Tax, Incorporation Relief and other potential transfer taxes. Relief is not automatic for every transaction.
Register the company. Decide its name, registered office, directors, shareholders, share structure and people with significant control. Complete the applicable Companies House identity-verification requirements and incorporation documents.
Set up company finances and tax services. Open a separate company bank account and confirm Corporation Tax registration. HMRC must normally be told within three months of the company becoming active within the charge to Corporation Tax, not simply three months after formation. Arrange PAYE, VAT and pension obligations where required.
Complete the sole-trader closure correctly. When the sole trade actually stops, notify HMRC and complete the final return and any remaining reporting obligations. Personal Self Assessment may continue for dividends, other income or other reasons.
Keep the company compliant. Maintain bookkeeping, evidence transfers and dividends, reserve funds for tax, and monitor separate accounts, return and payment deadlines.
Frequently asked questions
At what profit level should I become a limited company?
There is no universal threshold. Compare your expected profits, personal cash needs, taxes, commercial objectives and additional costs. Higher profits do not automatically mean a company is better.
Is a limited company always more tax-efficient?
No. Corporation Tax and tax on withdrawn profits must both be considered. A company can be useful where profits are retained or appropriate pension contributions are made, but full withdrawal may leave less personal cash than sole-trader trading.
Are my personal assets completely protected?
No. Limited liability provides important separation, but personal guarantees and specific legal liabilities can still put personal assets at risk.
Can I simply move my existing business into a company?
The transfer needs planning. Assets, contracts, VAT, employees and liabilities do not all move automatically, and tax consequences can arise. Take advice before transferring assets or committing to a structure.
How can 360 Accounts help?
360 Accounts & Bookkeeping can compare the structures using your actual circumstances, explain the costs and obligations, and support incorporation, accounts, tax and payroll where appropriate. Contact us for a tailored review before making the change.