The question of whether to trade as a sole trader or set up a limited company comes up constantly — from freelancers just starting out to contractors who have been operating the same way for a decade and are wondering if they are leaving money on the table. Weighing up the benefits of a limited company vs sole trader is genuinely worthwhile at the right point in a business’s life. But doing it too early, or for the wrong reasons, can cost you more in admin and accountancy fees than it saves in tax.

According to ONS data published in 2025, companies now account for 76.7% of UK businesses, and company registrations grew by 1.8% in the year to March 2025 — while the number of sole proprietors fell by 4.1% over the same period. More people are incorporating, but that trend alone is not a reason to follow suit.

Below, we work through the main differences in plain terms — tax rates, liability, admin overhead, and a few things that have changed for 2026/27 that are worth factoring in before you make a decision.

This is usually what drives the conversation. As a sole trader, all your profits are subject to Income Tax and Class 4 National Insurance. Once you are earning above the basic rate band, you are paying 40% Income Tax on everything over the threshold — and that adds up quickly.

A limited company pays Corporation Tax on its profits instead. For profits of £50,000 or less, the small profits rate is 19%. For profits over £250,000, the main rate is 25%. Between the two, Marginal Relief applies — so it is not a cliff edge, but the effective rate does rise through that band.

As a director-shareholder, you can then draw a combination of salary and dividends. A modest salary (typically set around the National Insurance secondary threshold) keeps your NI bill low, and dividends are taxed at lower rates than equivalent salary income. That combination — Corporation Tax on profits, then dividends at dividend rates — is usually where the tax saving comes from.

It is worth noting that dividend tax rates have moved from April 2026. The ordinary dividend rate has risen to 10.75% (up from 8.75%), and the upper rate to 35.75% (up from 33.75%). The additional rate stays at 39.35%. The saving versus salary income is still meaningful, but the gap has narrowed a little, which is worth factoring into any comparison.

Simplicity is real and it has a monetary value. As a sole trader, your accounting obligations are straightforward: keep records, file a Self Assessment tax return each year, and — if you are VAT-registered — submit quarterly VAT returns. That is it. There is no Companies House filing, no annual confirmation statement, no requirement to produce statutory accounts in a prescribed format.

Lower accounting fees follow from that simplicity. A sole trader with modest turnover will typically pay noticeably less for year-end compliance than a limited company director, because the work involved is genuinely less.

There is also the matter of Making Tax Digital for Income Tax (MTD for IT), which becomes mandatory for sole traders with qualifying income above £50,000 from April 2026, and above £30,000 from April 2027. That does add some administrative discipline to sole trader recordkeeping — but cloud software like Xero handles the quarterly submissions without much friction once set up properly.

If your profits are modest — broadly, below around £30,000 to £35,000 — the tax saving from incorporating often does not cover the extra compliance cost. The maths simply do not work yet. That is not a reason never to incorporate; it is a reason not to do it before your turnover justifies it.

A sole trader and their business are legally the same entity. If the business owes money — a supplier dispute, a client claim, a tax bill that has got out of hand — you owe that money personally. Your personal assets are in scope.

A limited company is a separate legal person. Its debts are its own. As a director and shareholder, your personal exposure is generally limited to the value of your shares — assuming you have not given a personal guarantee, which lenders and landlords often require for small companies.

For some types of work, this distinction matters a great deal. A consultant whose contract could expose them to a large claim, a tradesperson whose work might attract liability for defects, or anyone operating in a sector where things can go wrong in a financially significant way — these are situations where the corporate veil provides genuine protection.

For a freelance copywriter billing £2,000 a month with no employees and no significant client-facing risk, the liability argument carries less weight. But it is worth thinking through honestly for your own situation, not just assuming it does not apply.

One thing that catches people out when they incorporate is the ongoing compliance cost, both in time and fees. A limited company must:

• File annual accounts with Companies House (publicly visible)
• Submit a Corporation Tax return to HMRC
• File a confirmation statement each year
• Run payroll for any salary drawn, including RTI submissions
• File a personal Self Assessment return as a director
• Maintain statutory books and records

Each of those tasks is manageable, but together they add up — in accountancy fees and in the time you spend gathering information and signing things off. A well-run limited company with a good accountant keeps this friction low, but it never disappears entirely.

The practical implication: the tax saving from incorporation needs to meaningfully exceed the additional compliance cost before the numbers work. We tend to suggest clients run a rough comparison with their accountant before making the move — not because incorporation is the wrong choice, but because doing it a year too early costs money without benefit.

The direction of travel on dividend taxation is worth acknowledging. Each time the dividend allowance has been cut or the rates increased — and both have happened in recent years — the tax efficiency of the salary-plus-dividend model erodes a little. The April 2026 rate increases are a continuation of that trend, not an anomaly.

This does not make limited companies a worse option. The Corporation Tax small profits rate of 19% still represents a meaningful difference from the 40% or 45% Income Tax rates faced by higher-earning sole traders. But it does mean the breakeven point — the profit level at which incorporating starts to save you money net of fees — is slightly higher than it was a few years ago.

If you are a contractor considering IR35, that adds another layer. Your trading structure interacts with your IR35 status, and getting that wrong carries its own costs. That is a separate conversation, but it belongs in the same decision-making process as structure.

Our view: incorporation still makes clear financial sense above a certain profit level, and the liability protection case is independent of tax. But it is a decision worth modelling properly rather than following a trend.