Updated on the 6th November 2026
Managing contractors in the UK involves more than agreeing on rates and signing contracts. Businesses must also understand their responsibilities around employment status, tax treatment and Right to Work checks.
In 2026, changes affecting the company-size thresholds used for IR35 assessments have made it particularly important for businesses to review whether they fall within the off-payroll working rules.
For HR, finance and procurement teams managing external workforces, the challenge is not simply understanding the legislation. It’s applying the right processes consistently, documenting decisions and keeping contractor records accessible.
This guide explains how IR35 and Right to Work obligations differ, what businesses should review and how a structured contractor management process can help reduce administrative complexity.
IR35 concerns the tax treatment of engagements where an individual provides services through an intermediary, often a personal service company (PSC), and would be treated as employed for tax purposes if engaged directly. The off-payroll working rules determine who must assess status and operate the relevant tax deductions.
An inside-IR35 determination generally means the relevant deemed employment payment is subject to PAYE income tax and National Insurance rules. This is a tax-status decision, not an automatic determination of employment rights.
Under the public-sector reforms and the later private-sector extension, the client generally determines status where the off-payroll rules apply. For qualifying small private-sector clients, responsibility usually remains with the intermediary.
An in-scope client must take reasonable care when determining status and issue a Status Determination Statement (SDS), with reasons, to the worker and the person or organisation it contracts with. Responsibility for PAYE and National Insurance can depend on the contractual chain, fee-payer arrangements and whether statutory duties were met; it does not automatically sit with the worker or the client in every case.
This is not a technical risk that sits at the margins of your contractor program. It is an operational responsibility that applies to every qualifying engagement.
Not every client must make off-payroll status determinations. Public authorities and medium or large private-sector clients are generally within scope, subject to the statutory rules and relevant company-size tests. For qualifying private-sector companies, the small-company test uses two of three criteria:
Turnover of no more than £15 million
Balance-sheet total of no more than £7.5 million
No more than 50 employees
Meeting at least two of these conditions can indicate a small company, subject to the applicable accounting period, group rules and statutory definitions.
Do not decide exemption from a single year's headline figures. Consider the applicable accounts, group structure, timing and whether the small-client exception applies. Where it does, the intermediary generally retains responsibility for assessing the engagement under IR35.
The increased monetary thresholds require careful consideration of their effective date for a particular company and the timing rules used for off-payroll working. The date on which a business becomes small for these purposes cannot be inferred from the start of the tax year alone. Businesses near the thresholds should confirm their position with finance or tax advisers before changing their assessment process.
For in-scope clients, each potentially relevant engagement through an intermediary should be considered on its own facts. A contractor's UK location or incorporation flag alone is not a complete legal assessment.
IR35 status depends on the contractual terms and the reality of the working relationship. HMRC and the courts consider factors such as control, substitution, financial risk and the wider circumstances of the engagement when determining employment status for tax purposes. HMRC's position, reinforced consistently through tribunals, is that the label attached to an engagement matters less than how it actually operates day to day.
Relevant factors include the following, considered together rather than as a mechanical score:
Substitution. Is there a genuine, workable right to provide a substitute, and what restrictions apply? A right does not have to be exercised to be relevant, but contractual wording must be considered alongside the practical reality.
Control. Who decides how, when, and where the work is done? A contractor who follows your methods, works your hours, and works at your site looks more like an employee than one who determines their own approach and working pattern.
Financial risk. Does the contractor bear genuine financial risk? A contractor who fixes their own mistakes unpaid, works for a fixed price, provides their own equipment, and is not guaranteed a minimum volume of work is in a stronger outside-IR35 position than one who is paid for their time regardless of the outcome.
Integration. Is the contractor effectively part of your organisation? Benefits, managing your staff, presenting as a member of your team, and long-term exclusive arrangements all point toward inside-IR35 status.
HMRC's Check Employment Status for Tax (CEST) tool can assist with assessments when accurate information is supplied. It is not the only permissible approach. Document the facts, reasoning and any material changes to working practices.
Alongside IR35, businesses engaging workers in the UK need to understand their responsibilities under Right to Work legislation. While IR35 focuses on employment status for tax purposes, Right to Work checks establish whether an individual has permission to undertake the relevant work in the UK.
These are separate compliance requirements, and the obligations can differ depending on how an individual is engaged.
Businesses should identify which engagements fall within the statutory checking requirements and who is responsible for carrying out those checks. The correct process depends on the nature of the engagement and the applicable Home Office guidance.
For organisations working with employees, contractors, agencies and other external workforce providers, maintaining clear responsibility for checks is particularly important.
Where statutory Right to Work checks are required, employers must follow the prescribed checking process to establish a statutory excuse against a civil penalty. This includes using an appropriate verification method and retaining the required evidence. Civil penalties for employing someone illegally can reach £45,000 per worker for a first breach and £60,000 for a repeat breach.
For businesses managing large external workforces, clear onboarding procedures and accessible records help reduce the risk of missed checks and inconsistent documentation.
IR35 and Right to Work obligations create three related but distinct operational priorities for businesses:
First, identify engagements potentially subject to the off-payroll rules. Not every contractor works through an intermediary, and a PSC is not the only possible intermediary. Check whether the client is in scope before deciding who must issue an SDS.
Second, apply reasonable care to the actual contractual terms and working practices. Issue the SDS, with reasons, to the required recipients and retain supporting records. Role-based assessments can assist where circumstances are materially identical, but they must not conceal individual differences.
Third, map Right to Work requirements by engagement model, confirm the organisation responsible for each check and retain the evidence required by the relevant Home Office guidance.
For businesses managing these requirements manually across a contractor population that spans dozens or hundreds of engagements, the operational overhead is significant. The risk of gaps, missed assessments, or documentation that cannot be located under audit pressure is also significant.
For a practical overview of the key requirements, download our IR35 and Right to Work 2026 guide.
Managing IR35 compliance across multiple contractor engagements can quickly become an administrative challenge. From identifying which engagements need reviewing to documenting decisions and maintaining records, businesses need a consistent process that doesn’t rely on disconnected spreadsheets and email chains.
TalentDesk brings IR35 assessments and supporting documentation into a centralised contractor management platform, helping businesses manage reviews more efficiently and maintain visibility across their external workforce.
TalentDesk’s IR35 Reviews dashboard provides a centralised view of contractor information and assessment outcomes. Businesses can view contractors by their recorded IR35 status, including Inside IR35, Outside IR35 and Non-UK, alongside relevant provider details. Search, sorting and filtering make it easier to identify engagements requiring attention and keep track of existing assessments.
Not every contractor engagement requires the same assessment approach.
TalentDesk supports two options:
Both approaches support a more structured review process while allowing businesses to account for differences between engagements.
For businesses subject to the off-payroll working rules, documenting the reasons behind an IR35 determination is essential.
TalentDesk’s structured IR35 assessment workflow captures responses and supporting reasoning, then generates a Status Determination Statement (SDS) documenting the outcome.
The resulting statement records key information, including the client, worker, intermediary, assessment outcome and reasons for the determination.
IR35 compliance doesn’t end when a determination is made.
Businesses need to retain supporting information, respond to disagreements and review arrangements when working practices change.
TalentDesk keeps assessment information and supporting records organised within the platform, making it easier to retrieve documentation and maintain visibility over contractor engagements.
Under the off-payroll working rules, clients generally have 45 days to respond to a qualifying disagreement about a status determination.
For businesses looking for additional support with contractor engagements, TalentDesk also offers Agent of Record services.
Depending on the engagement and contractual arrangements, these services can support contractor classification, contracting and ongoing administration.
The allocation of legal and tax responsibilities depends on the relevant agreement and applicable legislation.
TalentDesk’s IR35 assessment tools support structured decision-making and documentation. They do not replace professional legal or tax advice.
For businesses managing contractors at scale, IR35 compliance depends on more than making the right determination. It requires a consistent assessment process, clear documentation and accessible records that can support decisions if they are challenged.
TalentDesk helps bring these activities together through structured IR35 assessments, Status Determination Statement generation and centralised record-keeping, reducing the administrative burden of managing contractor compliance.
Ready to simplify your IR35 processes? Explore TalentDesk’s contractor management platform or book a demo to see how it works.