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Dave's blog
Dave Chaplin is a former IT contractor, founder and CEO of ContractorCalculator, and author of the Contractors' Handbook and Beat IR35.
From RALC to PGMOL: the mutuality argument HMRC got wrong
After years of litigation, courts clarified mutuality of obligation, confirming HMRC had been applying it incorrectly.
Umbrella Tax Legislation: The Due-Diligence Illusion
The umbrella tax legislation introduces a structural shift in how tax risk is allocated across the labour supply chain.
Contractor Latest
HMRC ruled the Cabinet Office careless on IR35, leaving a £38.5m tax bill and a penalty of up to £8.9m. Here’s what it means for you.
The Conservatives have committed to replacing IR35 with a new system if they return to government.
Judge observes that the umbrella market had been a ‘lucrative possibility for fraud.’
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Other Contracting News
Shadow chancellor Andrew Griffith also said he wanted to simplify tax reporting rules for small businesses.
Upcoming changes due to the Employment Rights Act 2025
Questions linger over liability, compliance, historic risk and market alternatives as HMRC action and consolidation loom.
The government has published updated guidance on umbrella companies, introducing new rules on joint and several liability within labour supply chains.
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Recent Media Coverage
Telegraph
Cabinet Office hit with £38m bill over tax blunders
The Cabinet Office has been hit with a £38m tax bill after breaching rules on freelance working arrangements and also faces a penalty of up to £8.9m after HMRC found it failed to take ‘reasonable care’.
The Register
UK Cabinet Office takes £7.8M hit to kill off recruitment system
The UK Cabinet Office is facing a potential penalty of up to £8.9 million over its handling of contractors' tax status.
Business Matters
Cabinet Office sets aside £38.5m for IR35 bill after HMRC ruling
The Cabinet Office's IR35 liability stands at £38.5m after HMRC concluded the department failed to take reasonable care with its contractor tax affairs.
The Register
Gov.uk still struggling with IT contractor tax rules
UK government departments are still struggling to implement the tax laws governing IT contractors years after the controversial rules were introduced.
Financial Times
Football referees win tax battle with HMRC
Tribunal finds that officials’ ability to turn down assignments helped to justify self-employed status.





















