IR35 Status Checker

IR35 is the tax legislation that determines whether a contractor is genuinely self-employed or should be taxed as an employee. Getting it wrong can result in a significant tax bill plus penalties. This tool asks you about your working arrangement, the level of control your client has, your right to substitute, and other key factors that HMRC considers, then gives you a clear assessment of whether your contract is likely to fall inside or outside IR35, and what that means for how you should be paying tax.

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This tool provides general guidance about IR35 status. IR35 determinations are complex and depend on the specific facts of each engagement. For a definitive assessment, consult a specialist IR35 adviser or use HMRC's CEST tool.
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