Answer a few questions about your working arrangement and get an instant read on your likely IR35 status. Based on the same factors as HMRC's CEST tool, with clearer questions and contractor-friendly guidance.
Substitution, control, mutuality of obligation, and financial risk — the same lens HMRC uses, asked in plainer English.
Can you send a qualified substitute to do the work in your place?
01Who decides how, when, and where the work is carried out?
02Is there an ongoing commitment to provide or accept work?
03Do you bear financial risk for the work you do?
04Built by Alto Accounting — ACCA Chartered Accountants specialising in UK agencies
Understanding where you stand helps you plan and protect your income.
Know your likely tax position before agreeing contracts. IR35 status can mean a 20–25% difference in take-home pay.
01Identify contract terms that may need adjusting to better reflect your genuine working arrangement.
02If you disagree with a client's determination, understand which factors support your position.
03Find the optimal salary-dividend split for UK directors in 2026/27.
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Open calculatorOur accountants specialise in contractor tax. Get expert analysis of your contract terms and working practices, plus a defensible status determination if you need it.