The sole trader vs limited company UK decision is shifting in 2026. Making Tax Digital for Income Tax Self Assessment (MTD ITSA) will roll out, and it changes the calculation for thousands of self-employed women.

Many women start as sole traders because the barriers to entry are lower. The admin feels lighter, the registration is simpler, and you can focus on finding clients rather than filing forms. But MTD narrows that administrative advantage. Quarterly digital reporting will become a reality for many sole traders. Meanwhile, limited company directors face their own reporting obligations through Corporation Tax. The question is no longer just about tax rates. It is about which structure genuinely suits your business once the digital reporting rules land.

What MTD ITSA means for the sole trader vs limited company UK decision

HMRC will begin phased MTD ITSA rollout from 6 April 2026 (source: gov.uk). The thresholds work in stages. Sole traders with qualifying income above £50,000 will enter MTD first, in April 2026. Those with income between £30,000 and £50,000 follow from April 2027. Sole traders with income below £30,000 should enter MTD from April 2028. HMRC has confirmed it is reviewing the treatment of the smallest businesses.

Under MTD ITSA, sole traders must keep digital records using compatible software. They must also send quarterly updates to HMRC and submit a final declaration. This replaces the traditional single annual Self Assessment for those in scope. MTD-compatible software adds another ongoing cost to factor in, typically from £10 to £30 per month depending on features. Limited company directors, by contrast, do not fall under MTD ITSA for their salary and dividend income. They continue to report personal income through Self Assessment, while the company files Corporation Tax returns separately. The government has said MTD for Corporation Tax will not start before April 2026. Details of any phased rollout are yet to be confirmed (source: gov.uk).

This matters for your structure choice. If you are a sole trader with turnover above £50,000, quarterly digital reporting on your business income starts from April 2026. A limited company director drawing a salary and dividends does not report through MTD ITSA for that personal income. However, the company has its own Corporation Tax obligations.

Tax rates and thresholds for 2026/27

The tax comparison between structures depends on current rates. Here are the figures that apply from 6 April 2026 to 5 April 2027, based on rates and thresholds confirmed by the government as of 2024.

Sole trader tax

Sole traders pay Income Tax on profits after the personal allowance. The personal allowance for 2026/27 is £12,570, frozen at this level until April 2028 (source: gov.uk). Income above this is taxed at 20% up to £50,270 (the basic rate threshold for England, Wales, and Northern Ireland). Higher rate tax of 40% applies to income between £50,271 and £125,140. Additional rate tax of 45% applies above £125,140.

Sole traders also pay Class 4 National Insurance contributions. For 2026/27, Class 4 NICs are 6% on profits between £12,570 and £50,270. They are 2% on profits above £50,270 (source: gov.uk). Class 2 NICs were abolished from April 2024. However, self-employed people with profits above £12,570 still qualify for contributory benefits, including the state pension. Those with profits below £6,725 can pay Class 2 voluntarily to protect their state pension entitlement.

Limited company tax

A limited company pays Corporation Tax on its profits. The main rate for 2026/27 is 25%, applying to companies with profits above £250,000. Companies with profits up to £50,000 pay the small profits rate of 19%. Between £50,000 and £250,000, marginal relief tapers the effective rate (source: gov.uk).

Directors typically extract money through a combination of salary and dividends. Many directors take a salary up to the National Insurance primary threshold of £12,570 for 2026/27. This avoids employee NICs while counting towards state pension. Employer NICs may apply on earnings above the secondary threshold. However, the Employment Allowance can offset this for eligible companies.

The dividend allowance for 2026/27 is £500. Dividends above this face tax at 8.75% (basic rate), 33.75% (higher rate), or 39.35% (additional rate). These rates apply on top of the Income Tax bands already used by salary.

Comparing the numbers: sole trader vs limited company UK example

Consider a woman running a consulting business with £75,000 of profit before tax in 2026/27. Here is how the two structures compare.

As a sole trader, she receives the £12,570 personal allowance tax-free. Income between £12,571 and £50,270 is taxed at 20%. The remaining £24,730 is taxed at 40%. She also pays Class 4 NICs at 6% on profits between £12,570 and £50,270, and 2% above that. Her total tax and NICs bill comes to approximately £20,200, leaving her with around £54,800.

As a limited company, she draws a £12,570 salary. The company can deduct this from its profits before Corporation Tax. This reduces the taxable profit to £62,430. Corporation Tax on this amount, with marginal relief applied, comes to approximately £12,794. This leaves approximately £49,636 in post-tax profit available for dividends. After the £500 dividend allowance, her dividends face tax at 8.75% within the basic rate band. The portion above £50,270 total income is taxed at 33.75%. Her total personal tax on dividends is approximately £7,283. Combined with the Corporation Tax, her total bill is around £20,077, leaving her with approximately £54,923 in hand.

The figures are close. The limited company route offers slightly more flexibility, since she can leave surplus profits in the company and defer personal tax. However, accountancy fees for a limited company typically run £1,000 to £2,000 per year. For a sole trader, they usually range from £300 to £800. At this income level, those costs erode the tax advantage almost entirely. The decision needs to be about more than the tax bill alone.

Liability, credibility and administrative burden

Tax is only part of the picture. The sole trader vs limited company UK decision also hinges on legal protection and how you want to present your business.

A sole trader has unlimited personal liability. If the business owes money or faces a legal claim, your personal assets, including your home, face risk. A limited company is a separate legal entity. Your liability stays limited to the amount you have invested in shares. This protects personal assets in most circumstances.

For women bidding for contracts with larger organisations or public sector bodies, limited company status can carry credibility. Some procurement frameworks require suppliers to be limited companies. If you are targeting corporate clients or government contracts, incorporating may open doors that sole trader status cannot.

The administrative burden differs sharply. Sole traders register with HMRC and file one Self Assessment return each year, plus quarterly MTD updates if in scope. Limited companies face more requirements. They must register with Companies House, file a confirmation statement annually, and maintain statutory registers. They also file annual accounts and submit a Corporation Tax return. Directors also have legal duties under the Companies Act 2006, including keeping proper accounting records and acting in the company’s best interests.

From 2025, new company directors must complete identity verification with Companies House. They can do this either directly or through an authorised agent, under the Economic Crime and Corporate Transparency Act 2023. Existing directors must verify by the end of the transition period. Companies House has indicated this will run into 2027.

When each structure makes sense in 2026

Staying as a sole trader makes sense if your profits are below £50,000, your personal liability risk is low, and you value simplicity. Your clients may not require limited company status. If you are comfortable with MTD quarterly reporting, lower accountancy costs and simpler admin may outweigh the tax savings of incorporation.

Incorporating makes sense if your profits exceed £50,000 and you want to protect personal assets. It also helps if you are bidding for contracts that require limited company status, or if you plan to bring in investors or co-directors. The ability to leave profits in the company can help with tax planning. You can control when you draw them as dividends, which is particularly useful if your income fluctuates year to year or if you are balancing business growth with family commitments. The flexibility to adjust your salary and dividend mix means you can manage your tax position around your life, not the other way round. The structure also supports bringing a spouse or partner in as a shareholder if they contribute to the business.

Practical steps to switch structures

If you decide to move from sole trader to limited company, the process is straightforward but requires care. First, check your chosen company name on the Companies House register. You can register your limited company online for £50 (source: gov.uk). Next, notify HMRC that you have ceased self-employment. You must also register the new company for Corporation Tax within three months of starting to trade.

You will need to transfer business assets and close your sole trader VAT registration if applicable. You must also open a new business bank account in the company name. Your accountant can advise on the most tax-efficient way to transfer assets. Some transfers may trigger Capital Gains Tax or Corporation Tax implications. If your turnover is above the VAT threshold of £90,000, you must register the new company for VAT.

Do not forget to update your clients with your new invoicing details. You should also register for PAYE if you plan to draw a salary. If you have any ongoing sole trader reporting obligations for the transition period, set up your MTD-compatible software.

The sole trader vs limited company UK choice is not permanent. Many women in business start as sole traders and incorporate when their profits and ambitions grow. What MTD in 2026 changes is the cost of staying put. Quarterly digital reporting adds time and software costs to sole trader admin, narrowing the gap with limited company obligations. If your profits are above £50,000 and rising, the tax advantage of incorporation is real but thin. Accountancy fees will eat into it. What should tip your decision is liability, credibility with clients, and where you want your business to go next. Run the numbers for your specific situation and talk to an accountant. Choose the structure that fits where your business is heading, not just where it has been.