UK contractor legislation shapes how you work, how you’re paid and where responsibility sits when several businesses are involved in an engagement. For recruitment agencies, the same rules can affect how contractors are placed, which suppliers you work with and the checks needed across the labour supply chain.
Keeping up can be difficult because changes rarely arrive together. Some rules are already in force, while others develop through new legislation, HMRC guidance or employment status decisions.
In this guide, we’ll explain the UK contractor legislation that matters now and the changes already on the horizon.
What UK contractor legislation should you know about now?
Several areas of legislation are relevant to contractors, recruitment agencies, and end hirers alike in 2026, although their impact depends on how a contractor is engaged.
One of the biggest recent changes concerns umbrella company supply chains. Since 6 April 2026, new PAYE rules for labour supply chains involving umbrella companies have made recruitment agencies, or end clients where no agency is involved, responsible for making sure the umbrella operates PAYE correctly. Dividend tax rates have also increased, affecting many limited company contractors who take income through dividends.
IR35 and the off-payroll working rules remain central for contractors working through their own limited companies. Changes to the company-size thresholds used by the off-payroll rules may also shift responsibility for some engagements once the new thresholds apply to the relevant accounting periods. Meanwhile, the Employment Rights Act is being implemented in stages, bringing further changes for employees, agency workers and the businesses involved in engaging them.
Which rules matter most depends on your working structure. Understanding how limited company, umbrella, sole trader and CIS arrangements differ gives you a useful starting point for working out which legislation applies to you.
What do the umbrella PAYE rules mean?
The current PAYE rules increase the responsibility carried by recruitment agencies and some end clients when contractors are employed through umbrella companies.
The umbrella remains the worker’s employer and continues to calculate salary, make deductions and pay Income Tax and National Insurance to HMRC. Where an agency contracts directly with the end client, however, that agency is also responsible for making sure the correct PAYE is paid. If there is no agency in the chain, responsibility generally falls to the end client.
If the umbrella fails to pay HMRC the correct amount, the relevant agency or end client can be pursued for the shortfall. As a result, unpaid umbrella company taxes can create liability higher up the supply chain, giving agencies and end clients a stronger reason to scrutinise the providers they work with.
What do the umbrella PAYE rules mean for contractors?
If you work through an umbrella company, the rules don’t make you personally responsible for PAYE your employer fails to pay. The umbrella remains responsible for employing you, processing your salary and making the appropriate deductions.
The PAYE rules can still affect your contracting experience because agencies now have a stronger reason to scrutinise the umbrella companies they allow into their supply chains. Preferred supplier lists may become tighter, while providers are likely to face greater scrutiny around payroll processes and tax compliance.
That makes transparency especially important. The assignment rate paid to an umbrella isn’t the same as your gross salary or take-home pay, because employment costs and the umbrella’s margin are accounted for before your salary is calculated. HMRC provides guidance to help you check how your umbrella pay is worked out using information from your payslip and reconciliation statement.
A provider promising an unusually high take-home percentage should therefore prompt questions about where that figure comes from. What matters is whether the route from assignment rate to salary, deductions and final pay is clear.
What do the umbrella PAYE rules mean for agencies?
For recruitment agencies, umbrella compliance now carries a more direct financial consequence.
As such, supplier checks need to go beyond choosing an umbrella and adding it to an approved supplier list. Agencies need ongoing visibility over who is employing their contractors, how PAYE is being operated and whether the documentation supplied by the umbrella reflects what workers are actually receiving.
HMRC’s wider guidance on labour supply chain assurance reinforces the need to understand the organisations sitting within a supply chain rather than relying entirely on contractual assurances.
This means umbrella governance must become an ongoing part of contractor management rather than a check completed once at onboarding.
Companies like the FCSA and SafeRec are supportive organisations who audit umbrella companies, provide payslip checking services and instill compliance into the market.
What are the current IR35 rules?
IR35 remains one of the most important areas of contractor legislation for people providing services through their own limited companies.
The off-payroll working rules apply where someone provides services through an intermediary, usually their own company. The engagement falls inside IR35 if the individual would have been considered an employee for tax purposes had they provided those services directly to the client.
For public sector organisations and medium or large private-sector businesses, the client is generally responsible for deciding the contractor’s employment status and issuing a Status Determination Statement. Where a private-sector client qualifies as small, responsibility usually remains with the contractor’s intermediary.
The basic framework is well established, but the way it applies to individual engagements continues to develop through changes in business size, HMRC activity and employment status decisions.
What does IR35 mean for limited company contractors?
IR35 status is determined separately for each engagement. You may therefore have one assignment that falls outside the rules and another that falls inside them, depending on how each working relationship is structured and how the work is carried out.
This is why the contract alone doesn’t determine status. The degree of control exercised by the client, the obligations between the parties and the broader reality of the working relationship can all contribute to the assessment.
Recent cases continue to illustrate how those principles work in practice. The latest PGMOL decision, for example, provides further insight into how mutuality of obligation, control and the wider working relationship affect employment status for tax.
Where the client is responsible for determining your status, you should receive a Status Determination Statement explaining its conclusion. If you disagree, the rules also provide a process for challenging that decision.
What does IR35 mean for agencies?
Agencies shouldn’t make the status determination, but they can still be responsible for acting on it.
An agency that becomes the deemed employer may need to deduct PAYE and employee National Insurance from payments made to the contractor’s intermediary. It may also need to account for employer National Insurance and any applicable Apprenticeship Levy. HMRC sets out these deemed employer responsibilities under the off-payroll rules in more detail.
One organisation may determine the contractor’s status while another applies the tax treatment, so the right information must pass through the supply chain. If the Status Determination Statement does not reach the organisation responsible for acting on it, responsibility can shift.
Agencies also need to know whether the client is responsible for determining status in the first place. The thresholds used to define a small company increased from April 2025, meaning more businesses may eventually fall outside the client-led off-payroll regime, and therefore more contractors retain the responsibility under the original IR35 rules.
Because company size is assessed using earlier accounting periods, the impact isn’t immediate. For more insights on this topic, read our article on how new small-company thresholds can change IR35 responsibility and why agencies should keep client classification under review.
How do current tax rules affect limited company contractors?
Tax changes can alter how much of your company income ultimately reaches you personally, even when the business itself is earning the same amount.
For the 2026/27 tax year, the basic dividend tax rate is 10.75%, while the higher rate is 35.75% and the additional rate remains 39.35%. The dividend allowance is £500. GOV.UK publishes the current dividend tax rates and allowance.
If you take part of your income through dividends, the increase in the basic and higher rates can affect your personal tax position. How much difference it makes will depend on your wider income and circumstances, but calculations based on earlier rates may no longer reflect what you actually owe.
Corporation Tax remains part of the same picture. The amount due depends on company profits and circumstances, while other tax changes can become relevant at different points in the life of the business. Business Asset Disposal Relief, for example, may matter when a contractor closes a company and extracts remaining value.
This is why individual tax announcements are best understood in context. Our coverage of the tax and compliance changes affecting contractors and recruitment businesses brings together several of the developments currently shaping the contractor market.
What do PAYE and National Insurance rules mean for umbrella contractors?
Umbrella contractors are employees of the umbrella company, so Income Tax and employee National Insurance are deducted through PAYE rather than managed through decisions about salary and dividends.
Employer National Insurance forms part of the cost of employing the worker and is funded from the assignment rate received by the umbrella. This is one reason the assignment rate attached to an umbrella contract shouldn’t be confused with the worker’s gross salary.
The current National Insurance rates and thresholds for employers determine how those costs are calculated during the tax year.
For contractors comparing assignments, understanding the payment chain matters because two headline rates can produce different take-home figures depending on how the engagement is structured. The same distinction is important for agencies when setting rates that need to cover employment costs before the worker’s salary is calculated.
How does the Employment Rights Act affect contractors?
The Employment Rights Act is being implemented in stages, and its effect on contractors depends heavily on employment status.
Umbrella contractors are employees of their umbrella company, which means employee rights can apply directly to them. Limited company contractors operate through a separate business, so those protections don’t automatically apply in the same way.
Changes already introduced include reforms to Statutory Sick Pay and day-one access to certain forms of family leave. Further measures are being phased in over time, and the government’s Employment Rights Act implementation timetable sets out when individual provisions are expected to take effect.
For umbrella contractors, these developments reinforce an important feature of the arrangement: although the work is carried out for an end client, the umbrella is the employer and carries the employment responsibilities attached to that relationship.
For limited company contractors, the distinction remains equally important. Being treated as employed for tax purposes under IR35 doesn’t automatically make you an employee of the end client for employment-rights purposes. HMRC’s guidance makes clear that deemed employment under the off-payroll rules doesn’t itself create rights such as holiday pay or automatic pension enrolment from the client.
What does changing employment law mean for agencies?
Recruitment agencies need to follow employment-law changes because some reforms reach beyond direct employees into agency working and umbrella arrangements.
Measures under the Employment Rights Act include provisions dealing with areas such as guaranteed hours, notice of shifts and compensation when qualifying shifts are changed or cancelled at short notice. Some of the practical detail is still being developed, which means agencies need to follow the regulations and guidance that accompany the legislation rather than assuming the Act itself provides every operational answer.
Umbrella companies are also being brought further into the regulatory framework that applies to employment businesses. Government guidance already makes clear that recruitment businesses have responsibilities when working with umbrellas, while further regulation is expected as the reforms are implemented.
For agencies, the broader direction is towards greater visibility across the labour supply chain. Tax compliance, employment rights and supplier governance increasingly overlap, so changes in one area can affect the processes used elsewhere.
How does the National Minimum Wage affect umbrella contractors?
Umbrella contractors are employees, so their pay must meet National Minimum Wage requirements.
From 1 April 2026, the National Living Wage for workers aged 21 and over is £12.71 an hour. The rate for workers aged 18 to 20 is £10.85, while workers under 18 and qualifying apprentices are entitled to at least £8.00 an hour. The government publishes the current National Minimum Wage and National Living Wage rates.
For umbrella contractors, the key distinction is between the assignment rate and the pay you receive as an employee. The assignment rate paid to the umbrella covers the wider cost of employing you, including employer costs and the umbrella’s margin, before your gross salary is calculated.
This can make headline rates difficult to compare. An umbrella assignment rate and a limited company contract rate may look similar, even though they represent different stages of the payment process and can produce very different take-home pay.
Agencies need to account for the same distinction when agreeing rates with clients. The assignment rate must be high enough for the umbrella to cover the costs of employment while still paying the worker at least the applicable minimum wage.
What other umbrella company regulation is coming?
The April 2026 PAYE changes are part of a wider effort to strengthen regulation of the umbrella company market.
Umbrella companies sit in a distinctive position within the labour supply chain. They employ workers who are typically sourced and placed by recruitment agencies, creating an overlap between employment rights, recruitment regulation and tax compliance.
Government guidance for employment businesses working with umbrella companies already sets out existing responsibilities. The Employment Rights Act 2025 goes further by bringing umbrella companies within the scope of the regulatory framework for employment businesses, with implementation currently planned for 2027.
For contractors, this should bring greater regulatory oversight of the businesses that employ and pay them. For agencies, it means umbrella providers will increasingly need to be considered as part of wider supply-chain compliance, rather than simply as payroll suppliers.
The PAYE rules introduced in April 2026 are therefore one part of a broader change in how umbrella companies are regulated and overseen.
What other contractor legislation changes are coming next?
In addition to rules already in force, contractors and agencies should pay attention to any confirmed changes that may affect future decisions.
One example is the increase in company-size thresholds relevant to IR35. Once the new thresholds apply to the relevant accounting periods, some clients that currently make status determinations may qualify as small, moving responsibility back to the contractor’s intermediary.
Employment reforms are also continuing to take effect in stages, including measures affecting umbrella companies and agency workers. The final detail of some provisions will depend on secondary legislation and supporting guidance, so announcement and implementation shouldn’t be treated as the same thing.
Further ahead, pension salary sacrifice rules are due to change from April 2029. Only the first £2,000 of employee pension contributions made through salary sacrifice each year will remain exempt from National Insurance, although contributions above that level can continue. GOV.UK explains how the salary sacrifice rules are due to change.
For umbrella contractors using salary sacrifice to make larger pension contributions, the change may affect future financial planning.
The key with any announced measure is to check its effective date. A policy can attract attention long before it changes what a contractor or agency actually needs to do.
How can contractors stay on top of legislation changes?
You don’t need to follow every tax or employment law announcement to understand the rules that affect you. A more useful starting point is the structure you work through.
If you operate through a limited company, IR35 and changes to company or personal taxation are likely to have the greatest direct impact. If you’re employed through an umbrella, PAYE rules, employment rights and umbrella regulation play a larger role in how you’re paid and engaged.
Your circumstances can change your requirements as well. Moving between working structures brings different responsibilities, while changing clients can alter who is responsible for an IR35 determination.
It also helps to distinguish between different types of updates. Legislation changes the legal framework, HMRC guidance explains how rules should be applied and court or tribunal decisions can clarify how principles such as employment status work in practice.
At Brookson, we regularly cover IR35 developments, HMRC announcements, tax changes and wider contractor regulation on our blog.
How should agencies respond when contractor legislation changes?
For agencies, the first question is whether a legislative change moves responsibility anywhere within the labour supply chain.
The umbrella PAYE rules provide a clear example. The umbrella still runs payroll, but an agency can now carry direct exposure if the correct PAYE isn’t paid. IR35 works differently because the client may make the status determination while an agency further down the chain becomes responsible for applying the resulting tax treatment.
Once responsibility is clear, the operational impact becomes easier to identify. A change may require stronger supplier checks or changes to the information passed between parties. It may also affect how an engagement is reviewed before it begins.
Processes also need to reflect what happens in practice. An IR35 assessment can be undermined if the actual working relationship differs from the assumptions on which the decision was based, while umbrella due diligence has limited value if nobody checks whether the provider continues to operate as expected.
Contractor compliance is therefore an ongoing part of supply-chain management rather than something to revisit only when a Budget or major HMRC announcement lands.
Get support with contractor compliance
Keeping up with contractor legislation is one challenge; understanding how a change applies to a particular contract or supply chain can be an even bigger one.
Brookson supports contractors, recruitment agencies and end hirers across IR35, employment status and wider contractor compliance. Specialist legal and compliance support can help with individual engagements and wider contractor workforce processes. It can explain where responsibility sits and how the current rules apply in practice.
FAQs
1. What legislation affects UK contractors?
The rules that affect you depend on how you work. Limited company contractors may need to consider IR35, company taxation and dividend rules, while umbrella contractors are also affected by PAYE requirements and relevant employment rights.
The type of client and the terms of a particular engagement can change which rules apply, especially when employment status needs to be determined.
2. Does IR35 still apply to UK contractors?
Yes. The off-payroll working rules remain in force and apply where a contractor provides services through their own intermediary but would have been considered an employee for tax purposes if engaged directly.
Responsibility for applying the rules depends on factors including the type and size of the client.
3. What are the current umbrella company PAYE rules?
For payments made from 6 April 2026, the agency contracting directly with the end client is responsible for making sure PAYE is operated correctly where an umbrella company employs the worker. If there’s no agency in the chain, responsibility generally falls to the end client.
If the umbrella fails to pay the correct amount to HMRC, the relevant agency or end client can be pursued for the underpayment.
4. Do the umbrella PAYE rules make contractors responsible for unpaid tax?
No. The umbrella remains the contractor’s employer and is responsible for running payroll and making the required deductions.
The rules increase the responsibility carried by agencies and end clients rather than transferring the umbrella company’s PAYE liability to the worker.
5. Are umbrella contractors covered by employment rights?
Umbrella contractors are employees of their umbrella company, so relevant employee rights can apply to them.
Which rights apply will depend on the individual’s circumstances and the legislation in force at the time, particularly as Employment Rights Act reforms continue to be introduced.