Dave Chaplin
The IR35 authority
CEO·ContractorCalculator·IR35 & Off-Payroll Working
Profile
The UK's foremost authority on IR35 and off-payroll working — and the person who has done more than anyone to ensure that contractors, businesses, and the practitioners who advise them actually understand these rules. Dave has advised Parliament, given expert testimony to HMRC, and built ContractorCalculator into the profession's most-used resource on employment status determination. What makes Dave exceptional is not just his technical knowledge but his relentless advocacy for clarity and fairness in a regime that has caused more confusion, anxiety, and litigation than almost any other area of UK tax.