Operating through a limited company remains one of the most effective ways for contractors, consultants, and self-employed professionals to manage their tax position in the UK. The difference in total tax between operating as a sole trader and operating efficiently through a limited company can amount to tens of thousands of pounds per year for high earners. This guide explains the mechanics, the legitimate planning strategies, and the important constraints — including IR35.

The Basic Tax Comparison

Sole Trader

A sole trader paying themselves all profits as personal income faces:

Income tax at 20% on income above the personal allowance (£12,570), 40% above £50,270, and 45% above £125,140
Class 4 National Insurance at 6% on profits from £12,570–£50,270, and 2% above £50,270
Class 2 NI is no longer payable: from 6 April 2024 self-employed people with profits above the small-profits threshold are treated as having paid Class 2 (so they retain entitlement to contributory benefits) without an actual charge

On £150,000 of profit, the effective tax and NI rate as a sole trader is approximately 47–48%. There is limited scope to reduce this through structuring.

Limited Company

A limited company pays:

Corporation tax at 25% on profits above £250,000; 19% on profits below £50,000; marginal relief between £50,000 and £250,000
The director-shareholder then extracts profit via salary and dividends rather than taking all income at personal rates

The overall tax saving from operating through a limited company — for higher-rate taxpayers — typically ranges from 8–15% of gross income, depending on the exact level of income and the structure used.

Salary Strategy: The Optimal Director's Salary

The most efficient salary for a director-shareholder is not zero — nor is it equivalent to the personal allowance. The optimal point balances:

National Insurance qualifying year: paying yourself at least at the lower earnings limit (£6,708 in 2026/27) preserves your entitlement to a qualifying year for state pension purposes
Primary NI threshold (£12,570): paying a salary at this level avoids employee NI (which starts above the primary threshold) while still qualifying for NI credits
Employer NI: employer's NI starts at £5,000 (the secondary threshold in 2026/27, reduced from £9,100 and frozen to 2030/31). Salary at the primary threshold of £12,570 attracts employer NI on the excess above £5,000 — at 15% (raised from 13.8% on 6 April 2025)

For most one-person companies without the employment allowance (which small companies with a sole director may not be entitled to claim in full), the optimal salary is often at or near £12,570 to:

Fully utilise the personal allowance against salary (avoiding corporation tax deduction but shifting tax liability to the company at 19%/25%)
Minimise employer NI
Qualify for a state pension year

The "right" salary depends on your specific circumstances: whether you have other income, whether you are in a salary sacrifice pension arrangement, whether you employ other staff (who would enable the employment allowance to offset some employer NI). Take professional advice on your specific optimum.

Dividends: Rates and Strategy

After taking the optimal salary, remaining profits can be distributed as dividends. Dividend tax rates in 2026/27:

Dividend allowance: £500 (reduced from £2,000 in 2022/23; the reduction has been significant for higher earners)
Basic rate: 8.75% on dividends within the basic rate band
Higher rate: 33.75% on dividends within the higher rate band
Additional rate: 39.35% on dividends above £125,140

Dividends are paid from post-corporation-tax profits. So for a company paying 25% corporation tax, the total effective tax on income distributed as dividends to an additional-rate taxpayer is approximately 25% corporation tax + 39.35% on the net dividend = approximately 55% combined (though this is still lower than the 47–48% sole trader rate on equivalent income, and the comparison becomes more favourable at lower dividend tax rates for basic-rate recipients).

The key advantage of dividends over salary is the absence of National Insurance. There is no employee or employer NI on dividend distributions.

For a basic-rate taxpayer extracting £50,000 in dividends above the personal allowance:

Corporation tax: 19% on profit
Dividend tax: 8.75% on gross dividend received
Combined rate: significantly lower than equivalent personal income tax + NI

Company Cars

A company car provided to a director is a benefit in kind (BIK), taxable on the director at their marginal income tax rate. The taxable benefit is calculated as a percentage of the car's list price:

Electric cars: 4% BIK rate in 2026/27 (rising 1 percentage point a year — 5% in 2027/28, then 7% in 2028/29 and 9% in 2029/30 under announced increases)
Hybrid cars: 3–14% depending on electric range
Petrol/diesel cars: 25–37% depending on CO2 emissions

For a £50,000 electric car, the BIK is £2,000 (4% × £50,000), creating an income tax liability of £400 for a basic-rate taxpayer or £800 for a higher-rate taxpayer. This compares extremely favourably with an equivalent car allowance (fully taxed as income and subject to NI) or purchasing the car personally.

The company also benefits from first-year capital allowances on electric vehicles (currently 100%) and zero NI on the BIK. For contractors using electric vehicles, the company car route merits careful modelling.

Pension Contributions: The Major Tax Lever

Employer pension contributions from a limited company to the director-shareholder's pension are:

Deductible against corporation tax (reducing the company's tax bill at 19–25%)
Not subject to employee NI (employer NI also does not apply)
Not subject to income tax for the recipient (contributions are not treated as a personal benefit in kind)

This makes employer pension contributions through a limited company one of the most tax-efficient ways to extract money from a company.

Example: a company with £50,000 of retained profit makes an employer contribution to a SIPP. The contribution costs the company £50,000 but reduces corporation tax by £12,500 (at 25%), meaning the net cost to the company is £37,500. The director receives £50,000 in their pension.

By contrast, extracting the same £50,000 as salary would create income tax and NI liabilities, resulting in substantially less reaching the pension after tax.

Annual allowance limits apply: £60,000 per year (or 100% of relevant UK earnings if lower), with carry-forward of unused allowances from the previous three tax years. The "relevant UK earnings" restriction is crucial for companies with low salary extraction — the pension contribution must not exceed the director's salary from the company. Directors taking only dividends (with zero salary) have zero relevant UK earnings and cannot contribute to a personal pension from those earnings; however, employer contributions are not limited in the same way. Taking professional advice on the optimal pension funding approach for your company structure is strongly advisable.

IR35: The Critical Constraint

IR35 (the off-payroll working rules) is the legislation that prevents disguised employment — where a contractor works through a limited company but is, economically, an employee of the end client.

If you are caught by IR35, the tax advantages of operating through a limited company are substantially eliminated. Your income from the engagement is treated as if received directly as employment income — subject to full income tax and NI.

How IR35 Is Determined

HMRC uses three main tests to assess employment status for IR35 purposes:

Substitution: can you send a substitute to do the work, and would the client accept a genuine substitute? Real substitution right = indicative of self-employment
Control: does the client control how, when, and where you work? High control = indicative of employment
Mutuality of obligation: is there an expectation of continued work and an obligation to accept it? Significant mutuality = indicative of employment

Other factors include financial risk, the provision of equipment, and integration into the client's business.

Who Determines Status?

For contracts with medium and large businesses (the "off-payroll working" rules): the end client is responsible for determining IR35 status and, if inside IR35, deducting income tax and NI at source. The contractor receives income net of taxes.

For contracts with small businesses (meeting the statutory definition): the individual contractor's company remains responsible for determining its own IR35 status.

If IR35 applies, the limited company still exists but the tax advantage disappears. Operating through a company adds administrative cost without tax benefit in this scenario.

Relevant Life Plan

A Relevant Life Plan is a form of death-in-service life assurance provided by a company for an employee (including a director). Key features:

Premiums are corporation tax deductible — the company pays the premium, which is a business expense
Not a P11D benefit — the premiums are not treated as a taxable benefit in kind for the director
Replaces personal life assurance — provides equivalent protection (typically 5–10× salary) but at a lower net cost because the premium is paid from pre-tax company money
Proceeds paid in trust: the trust pays out to the director's chosen beneficiaries on death without forming part of the estate

For a higher-rate taxpayer with personal life assurance, the equivalent cover through a Relevant Life Plan costs considerably less in after-tax terms. The saving is equivalent to the corporation tax on the premium plus the income tax saved by not extracting the equivalent sum as salary.

Other Company Expenses

Legitimate company expenses that can be claimed through the company include:

Home office costs: if you work from home, HMRC allows a proportion of running costs attributable to the business room to be claimed; precise calculation requires care
Professional subscriptions and training: fully deductible if relevant to the business
Business travel: costs of travelling to clients and business meetings; commuting to a permanent workplace is not deductible
Accountancy and legal fees: fully deductible
Equipment and technology: capital allowances or annual investment allowance

Claiming personal expenses through a limited company — or expenses that are not wholly and exclusively for business purposes — creates both a tax risk (disallowance and penalties) and a legal risk (breach of director's duties to the company).

How Global Investments Can Help

Operating through a limited company involves more than just salary and dividend strategy. As a contractor or consultant, you may also need to plan for retirement (optimising pension contributions given your annual allowance history), protect yourself and your family (Relevant Life Plan, income protection insurance), and consider how your company structure interacts with your longer-term wealth and estate planning.

Global Investments works with contractors and independent professionals across different sectors and jurisdictions to build coordinated financial plans that extend beyond the company tax structure to your full financial picture.

Tax rules are subject to change, and the information in this article reflects the position as at June 2026. This article is provided for general information only and does not constitute tax or financial advice. Always take qualified professional advice specific to your circumstances.

To discuss your situation, please contact our team.

This article is for general information only and does not constitute financial, legal or tax advice. Rules, prices and regulations change; verify current requirements with a qualified adviser before acting.

Tax Planning Through a Limited Company for Contractors and Consultants