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IR35 Status Dispute Letter Template
How to dispute an IR35 inside determination with your client — what to include, your legal rights, and a free letter generator.
← All Letter Templates · Self Employed · Last updated 18 August 2026
This is free rights guidance, not legal advice. For advice specific to your situation, see our About page or contact Citizens Advice.
If you need to dispute an IR35 inside determination with your client, a written letter is the recommended first step — it creates a clear record and shows you're pursuing the matter formally. Below is what a strong ir35 status dispute letter should include, plus a free tool to generate yours.
What this letter needs to cover
- Formally dispute the status determination
- Set out why the contract should be outside IR35 based on substitution
- Control and mutuality of obligation tests
- Request a review of the determination
- Reference the Check Employment Status for Tax CEST tool if applicable
See our full letter template library for related templates, or use our free checkers for guidance specific to your situation.
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