Check your IR35 status. Calculate your real earnings. Make smarter decisions about contracting.
Compare permanent vs contractor. See the real difference.
Convert your salary to equivalent contractor day rate.
Check if your contract is inside or outside IR35.
Calculate your net pay: Ltd vs Umbrella vs PAYE.
Use "Should I Contract?" to compare your permanent package to potential contractor earnings.
Understand if your role would be inside or outside IR35 — this determines your structure options.
See exactly what you'll earn under each structure: Ltd company, umbrella, or caught by IR35.
Tired of confusing tax calculators and vague IR35 guidance? We built these tools to give UK contractors the clarity they deserve.
Every calculation is based on current HMRC rules and 2024/25 tax rates. No fluff, no upsells — just the numbers you need to make smart decisions.
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Yes, completely free with no hidden costs. We may add premium features in future, but the core calculators will always be free.
Our calculations use current 2024/25 UK tax rates and HMRC guidance. They're estimates for comparison purposes — always consult an accountant for your specific situation.
No. Only HMRC's official CEST tool or a professional determination is binding. Our checker helps you understand the key factors, but seek professional advice for certainty.
Built by people who understand UK contracting and wanted better tools than what's available. We're not accountants or lawyers — just folks who care about good UX and accurate numbers.