Report Tax Evasion UK: How to Report Someone to HMRC Anonymously (2026)
Quick Answer (2026): You can report tax evasion to HMRC online, by phone, or by post — usually anonymously — via the GOV.UK tax fraud reporting service. HMRC does not investigate every tip-off; reports backed by specific evidence — undeclared cash income, rental listings, marketplace activity, crypto transfers — are far more likely to trigger

