IR35: what happens when it goes wrong?

Contractors and freelancers operate through a private company to enjoy a better tax treatment compared to sole traders – but a more favourable tax position is actually never guaranteed because of off-payroll working rules known as IR35.

According to IR35, if a contractor or freelancer has a working relationship with a client that is more akin to regular employment, that worker has to pay income tax and National Insurance contributions on their income, rather than the more generous corporation tax.

This is called ‘deemed employment’, and working out whether you or your contractor are deemed employees can be difficult. At first, the responsibility for determining employment status fell solely on the worker themselves. However, reforms in 2017 for the public sector and 2021 for the private sector shifted this burden to the client engaging a contractor’s services.

Read more on IR35: What happens when it goes wrong, here: 

You might be interested in...

  1. Does your UK subsidiary require a statutory audit?

    14 Aug 2026

    Does your UK subsidiary require a statutory audit?

    Does your UK subsidiary need a statutory audit? Learn how group size, audit exemptions and worldwide group rules affect UK audit requirements.

    Learn more

    Does your UK subsidiary require a statutory audit?
  2. Should audit-exempt companies still have an audit?

    13 Aug 2026

    Should audit-exempt companies still have an audit?

    Audit exemption may reduce compliance obligations, but is stopping your audit the right decision? Explore the value independent assurance can bring.

    Learn more

    Should audit-exempt companies still have an audit?