How much could an off-payroll enquiry cost?
Enter a few figures to see what classification errors could cost in tax, interest and penalties across three illustrative scenarios.
Three illustrative scenarios
See the exposure if 10%, 25% or 50% of your engagements were incorrectly outside IR35.
Full working, line by line
Income tax, NIC, levy, credit, interest and penalty, all on 2026/27 rates.
Your assumptions, not ours
Adjust credit for tax already paid, penalty and HMRC interest to match your view.
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