Contractor Limited Companies: The Complete Tax Planning Guide for 2026

A contractor limited company is a company through which a self-employed professional supplies services to clients, often described by HMRC as a personal service company (PSC) when one individual owns and works through it. Operating through a limited company can be tax-efficient, but contractor limited company tax in the UK in 2026/27 is shaped above all by the IR35 off-payroll working rules, which decide whether you are taxed like a business or like an employee. This guide, written by Blue Tick Accountants, a Guildford-based UK tax advisory and accountancy practice, explains how IR35 works, how to structure your pay between salary and dividends, which expenses you can legitimately claim, and how to plan with confidence in an uncertain off-payroll environment. Get the structure right and a contractor company remains one of the most flexible and rewarding ways to trade.

Key Takeaways

• A contractor limited company, often called a personal service company (PSC), is a company through which one professional supplies their services to clients.
• IR35 determines whether a contract is "inside" (taxed like employment) or "outside" (taxed as a genuine business), and the deemed payment under inside-IR35 rules removes most of the company's tax advantage.
• For most public sector and medium or large private sector clients, the client (not the contractor) is responsible for assessing IR35 status from April 2021 onwards.
• The tax-efficient pay structure for an outside-IR35 contractor is a modest salary plus dividends, with dividend tax rates of 10.75%, 35.75% and 39.35% in 2026/27 and a £500 dividend allowance.
• Allowable expenses for a contractor company include salary, employer pension contributions, business travel, professional indemnity insurance, accountancy fees and equipment used for the business.
• In the worked example, an outside-IR35 contractor billing £90,000 retains materially more after tax than the same contractor caught inside IR35.

What Is a Contractor Limited Company and a Personal Service Company?

A contractor limited company is a private limited company set up by an individual to provide their professional services to end clients, usually with that individual as the sole director and shareholder. HMRC commonly refers to such a company as a personal service company, or PSC, because the company's income depends almost entirely on the personal work of one person.

Contractors across IT, engineering, consultancy, healthcare and the creative sector use this structure because it offers limited liability, a professional trading identity, and, where the work falls outside IR35, genuine tax efficiency. The company invoices clients or agencies, receives the income, pays its running costs and taxes, and the contractor extracts profit as a mix of salary and dividends.

The trade-off is administrative responsibility. A PSC must file annual accounts and a corporation tax return, run payroll and maintain accurate records. Making Tax Digital for Income Tax does not apply to limited companies, and no start date has been announced for Making Tax Digital for Corporation Tax. The central tax question for any personal service company recognised by HMRC, however, is not the paperwork but its IR35 status, because that single factor changes how almost all of the company's income is taxed.

How Do the IR35 Rules Affect Contractors in 2026/27?

IR35, also called the off-payroll working rules, exists to identify contractors who work like employees but trade through a company to reduce tax, and to tax them broadly as employees. A contract that is "inside IR35" is taxed as employment; a contract that is "outside IR35" is taxed as a genuine business-to-business arrangement.

Status is judged on the working reality, not the wording of the contract. The key tests are personal service and the right of substitution (can you send a substitute?), control (who decides how, when and where you work?), and mutuality of obligation (must the client offer work and must you accept it?). Other factors include financial risk, whether you are integrated into the client's organisation, and whether you provide your own equipment.

Since April 2021, responsibility for deciding status shifted to the client for all public sector engagements and for medium and large private sector clients. Where the client is "small" under the Companies Act definition, the contractor's own company remains responsible for assessing status and accounting for any tax due. When a contract is inside IR35, a "deemed payment" is calculated and subjected to income tax and National Insurance as though it were salary, which removes most of the benefit of using a company. Determining status correctly, and keeping evidence to support it, is therefore the single most valuable piece of contractor tax planning.

What Is the Most Tax-Efficient Pay Structure for a Contractor?

The most tax-efficient pay structure for an outside-IR35 contractor in 2026/27 is a modest director's salary combined with dividends drawn from post-tax company profit. This minimises National Insurance while making use of the personal allowance and the lower effective tax cost of dividends.

There are two sensible salary levels to consider. The first is £12,570, which uses the full personal allowance and maximises the salary deduction against corporation tax. The second is the Lower Earnings Limit of £6,708 for 2026/27, which is the minimum salary needed to secure a qualifying year towards the UK state pension while keeping the salary below the point where employee National Insurance begins. A salary at £12,570 generally produces a slightly better overall result where the company can claim the Employment Allowance against employer National Insurance, but a lower salary can suit a director with other earnings; both options are worth modelling for your circumstances.

Above the salary, profit is extracted as dividends, taxed at 10.75% in the basic-rate band, 35.75% in the higher-rate band and 39.35% in the additional-rate band for 2026/27, after a £500 dividend allowance. Dividends are paid from profit after corporation tax, so the company-level tax must be factored into any comparison. Leaving surplus profit in the company, or paying it into a pension, can defer or reduce personal tax where you do not need all the income immediately.

Worked example: outside IR35 versus inside IR35

Consider a contractor whose company bills £90,000 in a year, with £5,000 of genuine business expenses. Outside IR35, the company has roughly £85,000 of profit before the director's pay. Taking a £12,570 salary leaves taxable profit subject to corporation tax, and the remaining post-tax profit is drawn as dividends taxed at the 2026/27 rates, leaving the contractor with a substantially higher net position. Inside IR35, almost the entire £90,000 is treated as a deemed employment payment, taxed through income tax and National Insurance with little scope for the dividend route, leaving the contractor several thousand pounds worse off on the same billings. The gap shows why status assessment, not pay tinkering, drives a contractor's tax outcome.

What Expenses Can a Contractor Limited Company Claim?

A contractor limited company can deduct expenses incurred wholly and exclusively for the purposes of the business, reducing the profit chargeable to corporation tax. Claiming everything you are entitled to, and nothing you are not, is a core part of running an efficient PSC.

Allowable costs typically include the director's salary and employer pension contributions, business travel and subsistence (subject to the workplace rules, including the 24-month rule for temporary workplaces), professional indemnity and other business insurance, accountancy and legal fees, computer equipment and software, business telephone and broadband, and relevant training that maintains existing skills. Employer pension contributions are especially valuable, as they are deductible for the company and not taxed as the contractor's income, making a company pension one of the strongest tools for a higher-earning contractor.

Caution is needed where a contract is inside IR35, because the deemed payment calculation restricts the expenses that can be offset. Personal expenditure, ordinary commuting, and the cost of clothing that is not protective or a uniform are not allowable. Keeping clear digital records and retaining receipts ensures every claim can be evidenced if HMRC asks, which matters because contractor companies sit in a sector HMRC watches closely.

How Should Contractors Plan in an Uncertain IR35 Environment?

Contractors should plan on the assumption that IR35 status can be challenged, by securing robust status assessments, keeping evidence of genuine business behaviour, and structuring affairs so the company remains resilient whether inside or outside the rules. Certainty is impossible, but preparedness is achievable.

Practical steps include obtaining an independent IR35 status review for each significant engagement, ensuring contracts reflect the true working practices, and retaining evidence of substitution rights, control, and financial risk. Holding a reasonable cash reserve in the company, maintaining professional indemnity cover, and working for multiple clients all reinforce a genuine business profile. Tax investigation insurance can cover the professional cost of defending an HMRC enquiry, which is a sensible safeguard given the scrutiny contractors face.

For longer-term planning, contractors should review pay levels annually against the latest thresholds, consider pension contributions to extract profit tax-efficiently, and reassess whether a company remains the right vehicle if most work falls inside IR35. Where contracts are consistently inside IR35, an umbrella arrangement or even employment may leave a contractor in a similar net position with far less administration. The right answer depends on your client base, income level and plans, which is exactly where tailored advice pays for itself.

Frequently Asked Questions

What is a personal service company?

A personal service company (PSC) is a limited company through which an individual provides their professional services to clients, with that person usually the sole director and shareholder. HMRC uses the term for companies whose income depends mainly on the personal work of one individual. Contractors in IT, consultancy, engineering and similar fields commonly trade this way.

Who decides my IR35 status in 2026/27?

For public sector clients and medium or large private sector clients, the end client decides your IR35 status and issues a Status Determination Statement. Where the client qualifies as "small" under the Companies Act definition, your own contractor limited company remains responsible for assessing status and accounting for any tax due under the off-payroll rules.

How much salary should a contractor director take in 2026/27?

A contractor director typically takes either £12,570, using the full personal allowance and maximising the corporation tax deduction, or £6,708, the Lower Earnings Limit that secures a qualifying year for the state pension. The best choice depends on other income and whether the company can claim the Employment Allowance, so both should be modelled.

What dividend tax will I pay as a contractor in 2026/27?

In 2026/27, dividends are taxed at 10.75% within the basic-rate band, 35.75% within the higher-rate band and 39.35% within the additional-rate band, after a £500 tax-free dividend allowance. Dividends are paid from company profit after corporation tax, so the corporation tax cost must also be counted when comparing take-home pay.

Can a contractor claim travel expenses?

A contractor limited company can claim business travel that is not ordinary commuting, provided the workplace is temporary under the 24-month rule and the contract is outside IR35. Once you have worked, or expect to work, at one location for more than 24 months it is treated as a permanent workplace and travel there is no longer allowable.

Is it still worth using a limited company if I am inside IR35?

If most of your contracts are inside IR35, the tax advantage of a limited company is largely removed because income is taxed as deemed employment. Some contractors still keep a company for outside-IR35 work or non-contract income, but where everything is inside IR35 an umbrella company or employment may give a similar net result with far less administration.

How Blue Tick Can Help

Blue Tick Accountants advises contractors and personal service companies on IR35 status, pay structuring, allowable expenses and pension planning, helping you keep more of what you earn while staying firmly on the right side of HMRC. Whether you are setting up a contractor company, reviewing a borderline contract, or deciding whether a company still suits you, Blue Tick can model your options and put a clear plan in place. Head to our website and book a meeting now.

Conclusion

A contractor limited company can be highly tax-efficient, but the prize depends almost entirely on IR35 status, with an outside-IR35 contractor taxed as a business and an inside-IR35 contractor taxed much like an employee. Secure robust status assessments, take a sensible salary topped up with dividends, claim every legitimate expense, and use pension contributions to extract profit efficiently. The most important action is to confirm your IR35 position for each engagement and keep the evidence to support it, because that single factor decides how much of your income you keep.

About the Author

This guide was written by Leon, founder of Blue Tick Accountants, a Guildford-based UK tax advisory and accountancy practice that helps contractors, limited company owners and the self-employed across the UK. It was last reviewed for the 2026/27 tax year.

This article is intended for general informational purposes only and does not constitute tax, legal, or financial advice. Tax rules are subject to change and their application will depend on your individual circumstances. You should always seek advice from a qualified professional before taking action. Blue Tick Accountants accepts no liability for decisions made on the basis of this content.