Check Employment Status (CEST)
Check Employment Status for Tax (CEST)
Are you employed or self-employed for tax purposes? Learn how to use HMRC's Check Employment Status for Tax (CEST) tool, understand IR35 and assess the working arrangements that determine your tax status.
How to Check Employment Status for Tax
To check employment status in the UK, use HMRC's free Check Employment Status for Tax (CEST) tool. It helps establish whether a worker should be treated as employed or self-employed for tax and National Insurance purposes, including whether the IR35 off-payroll working rules apply to an engagement.
The result depends on the contract and the actual working arrangements. Employers, contractors, freelancers and agencies can use the service.
Official HMRC service • Free to use • No account required
What is the Check Employment Status for Tax tool?
CEST is HMRC's online employment status checker. It provides HMRC's view of a worker's status for tax and National Insurance based on the facts of a particular engagement.
Employees and workers
Check whether an engagement should be treated as employment or self-employment for tax purposes.
Contractors and freelancers
Assess the tax status of an engagement, including contracts carried out through a personal service company.
Businesses and agencies
Understand the tax treatment of workers and support employment status decisions with documented evidence.
How to Check Your Employment Status
Follow these steps to complete an HMRC CEST assessment correctly.
Gather the contract details
Have the written agreement available, together with information about any verbal or implied terms and how the work is actually carried out.
Open the official CEST tool
Visit HMRC's Check Employment Status for Tax service and select the relevant role, such as worker, hirer or agency.
Answer the questions accurately
Explain who controls the work, whether another person can perform it, who bears financial risk and how the working relationship operates.
Review the result
CEST may determine employment or self-employment for tax, an inside or outside IR35 outcome, or that it cannot determine status.
Save your assessment
Keep a copy of the answers, result and relevant supporting documents. Reassess if the contract or working practices materially change.
What Information Do You Need for CEST?
Contract information
- Contract terms and duration
- Services and responsibilities
- Payment arrangements
- Substitution and delegation rights
- Notice and termination provisions
Working arrangements
- Who decides how the work is completed
- Who controls working hours and location
- Equipment and expenses
- Financial risk and correction of errors
- Integration into the client's business
CEST requires an existing or expected contract, which may be written, verbal or implied. You cannot save an unfinished assessment and return later.
What Factors Determine Employment Status?
HMRC considers several aspects of the relationship. Explore the principal factors below to understand how they may influence an employment status assessment.
Control over the work
Who has the right to decide what work is done, how it is performed, when it takes place and where it is carried out?
Personal service and substitution
Must the individual perform the work personally, or can they genuinely arrange for another suitably qualified person to carry it out?
Financial risk
Consider responsibility for correcting defective work, business expenses, equipment and opportunities to profit through efficient management.
Mutuality of obligation
Consider the obligations to provide and perform work under the contract, including the nature and extent of ongoing commitments.
Integration into the organisation
Consider whether the individual operates as an independent business or is effectively part of the client's organisation.
What Do HMRC CEST Results Mean?
| CEST outcome | What it means | Next step |
|---|---|---|
| Employed for tax | The engagement is treated as employment for relevant tax purposes. | Establish who must operate PAYE and account for National Insurance. |
| Self-employed for tax | The engagement is treated as self-employment for relevant tax purposes. | Apply the appropriate self-employment tax treatment. |
| Inside IR35 | The off-payroll working rules apply to the engagement. | Identify the responsible party and operate the required tax deductions. |
| Outside IR35 | The engagement falls outside the off-payroll working rules. | Retain supporting evidence and review material changes. |
| Unable to determine | CEST cannot reach a definite conclusion from the answers. | Review the facts and obtain a detailed professional status assessment. |
The outcome wording and available results depend on the type of engagement being assessed.
Check Employment Status and IR35
Where a contractor provides services through a personal service company or another intermediary, the off-payroll working rules may apply. CEST can help assess whether the engagement would be treated as employment for tax if the intermediary were not involved.
Inside IR35
The engagement is treated as deemed employment for relevant tax purposes. The party responsible under the applicable rules must account for the required tax and National Insurance.
Outside IR35
The engagement is outside the off-payroll rules. The contractor's company normally continues to account for its own tax obligations under the relevant rules.
Who is responsible for deciding IR35 status?
Responsibility depends on the size and nature of the client and the applicable off-payroll rules.
| Client type | Who generally determines status? |
|---|---|
| Public sector organisation | The public sector client |
| Medium or large private sector client | The client |
| Small private sector client | Usually the worker's intermediary under the original IR35 rules |
These are general UK rules for engagements within the relevant legislation. Overseas-client situations and other exceptions may require separate consideration.
For further guidance, see our contractor accountants service information.
Employment Status Check: Example
Consider an IT consultant engaged for a six-month software implementation project.
Independent contractor
The consultant controls how the project is delivered, bears genuine financial risk and has a workable right to provide a substitute.
Possible implication: These facts may support self-employment or an outside IR35 assessment.
Employee-like engagement
The consultant must work personally, follows detailed management instructions and is closely integrated into the client's operations.
Possible implication: These facts may support employment or an inside IR35 assessment.
Illustrative examples only. Neither scenario establishes a definitive tax status without considering all relevant circumstances.
Is the HMRC CEST Tool Reliable?
HMRC states that it will stand by CEST results when the information supplied is accurate, remains accurate and the tool is used in accordance with its guidance.
What CEST can help with
- Assessing tax employment status
- Checking IR35 applicability
- Documenting the facts behind a result
- Reviewing changed contractual arrangements
What CEST cannot guarantee
CEST does not determine employment-law rights, replace an assessment of the actual facts or guarantee protection where answers are inaccurate or arrangements are contrived.
An inconclusive result requires further assessment rather than assuming the worker is self-employed.
Check Employment Status: FAQs
How do I check my employment status with HMRC?
Use HMRC's free Check Employment Status for Tax tool on GOV.UK. Provide accurate information about the contract and working arrangements, then save the completed assessment and result.
Is the HMRC CEST tool free?
Yes. CEST is free and anonymous. You do not need to create an account to complete an assessment.
Is using CEST mandatory?
No. HMRC does not require you to use CEST. However, the correct employment status must still be determined, and the applicable tax obligations must be met.
Does HMRC stand by CEST results?
HMRC says it will stand by results where the answers are accurate, remain accurate and the tool is used in accordance with its guidance. This does not extend to inaccurate answers or contrived arrangements.
Can I check whether I am employed or self-employed?
Yes. CEST can help determine whether a particular engagement is employed or self-employed for tax purposes. Your actual working relationship matters more than the label used in the contract.
Can limited company contractors use CEST?
Yes. Contractors working through limited companies can use CEST to assess whether the off-payroll working rules apply to an engagement.
What if CEST cannot determine my employment status?
Check that your answers accurately reflect the contract and actual working arrangements. If the outcome remains inconclusive, seek a detailed assessment from an appropriately qualified tax professional.
Does CEST determine holiday pay and employment rights?
No. CEST addresses tax and National Insurance status. Employment-law status and rights such as holiday pay require a separate legal assessment.
Do I need to check employment status for every contract?
Each engagement should be assessed on its own facts. A previous determination should not automatically be applied to a different contract, and material changes to an existing engagement may require reassessment.
Can a CEST result be used as a status determination statement?
HMRC says the saved result can be used as a valid status determination statement. Where the off-payroll rules place responsibility on the client, it must also meet the applicable reasonable-care and communication requirements.
HMRC Sources and Further Reading
These official resources explain how employment status and CEST assessments operate.
- HMRC: Check Employment Status for Tax
- HMRC: Employment status guidance
- HMRC Employment Status Manual: CEST
- HMRC: Understanding off-payroll working
Guide reviewed: October 2026. Tax guidance and legislation may change.
Unsure About Your Employment Status or IR35?
Employment status decisions can affect your tax position and compliance obligations. The Online Accountants provides online accounting and tax support for UK contractors, freelancers and limited companies.