IR35 Shield | The trusted partner for compliance-focused businesses

IR35 certainty. Powered by technology, protected by experts.

The trusted partner for compliance-focused businesses.
Total confidence with status tools, consultancy and IR35 defence.

Speak with an expert

IR35 status


years' IR35

Released in

The UK's first
IR35 status tool

Trusted by thousands of proactive businesses every day

  • Multiplex logo
  • AAB logo
  • La Fosse logo
  • PGA logo
  • Footasylum logo

Future-proof your business

IR35 compliance checks and investigations are causing costly problems for hiring firms.

Be confident your organisation is in the right hands. Our unique blend of exceptional technology, protected by a team of proven experts will safeguard your business now and in the future.


Your time matters. Unburden your teams.

Your business doesn't need to have experts to navigate the IR35 rules, that's what we're here for. Trust IR35 Shield to guide your compliance, whilst you look after your teams and your business.

Peace of mind for your business
Peace of mind for your business

Join hundreds of other teams and partner with us. You can be certain that your IR35 compliance is in the best hands.

Focus on what matters to you
Focus on what matters to you

IR35 compliance obstructing your current role? We've got it covered, spend less time on IR35 and more time doing what you love.

Our expertise at your fingertips
Our expertise at your fingertips

Our team is ready to help, with proven success in recent investigations and tribunals. IR35 compliance; it's what we do.

Speak with an expert

IR35 Shield gives us peace of mind that we are doing things correctly and, when we need to demonstrate our compliance, we have a solid defence team behind us.

Marie Downes

Chief Talent Officer - Adaptive

Read about our investigation success

Loved by our partners and their teams

Don't just take it from us, listen to some of the reasons our partners recommend IR35 Shield.

IR35 Shield saves us time, and its robustness leaves us comfortable in the knowledge that our workers have been assessed properly.

Debbie Chinn

Debbie Chinn

HR Advisor - PGA

The peace of mind our team gets from knowing that the relationship between all parties is compliant means we have one less thing to worry about.

Richard Mossman

Richard Mossman

CEO - Colehouse group

The assessment being weighted fairly across all factors gives us the confidence to reassure our clients that the outcome is correct.

Katherine Miller

Katherine Miller

Head of Legal and Audit - La Fosse

Speak with an expert
IR35 Academy

IR35 training. Best practice for your business, easy for your team.

Failing to take reasonable care can result in 6 years backdated tax plus penalties. Our online training makes IR35 simple, educates your team and demonstrates your compliance to HMRC. Find out more

We've got your back

When HMRC challenge your IR35 compliance, our expert team is here to minimise your stress. With professional fees covered, we'll take care of the entire defence process and help resolve any investigation quickly.

Chat with an expert about our Tax Investigation Service
Tax Investigation Service

Automate your workflow. Save time and do it right.

From our market-leading IR35 status tools through to our expert defence services, legal assistance and more, we've got your IR35 compliance covered.

Get a definitive result every time with our IR35 status tools

We lead the way with technological innovations, introducing the UK's first IR35 status tool in 2009. Our unparalleled level of detail and case-law led approach means you can trust our tool's accuracy every time.

Chat with an expert about our IR35 status tools
IR35 Shield reporting displayed on a monitor
Proven experts

Relax and let the proven experts protect your business

IR35 investigations happen all the time and can be costly and time consuming. Our extensive IR35 tax tribunal experience keeps us current, informing our approach to keeping you safe. With our proven track record of quickly closing down investigations, you can be confident you're covered by the right team.

Get a free consultation

Hire with confidence. Our legal team is here whenever you need us

Engage your contractors reliably. Our team of legal experts has decades of IR35 experience, and can secure your contracts, stress test your processes and safeguard your business.

Talk to us about our legal services
Hire with confidence
Speak with an expert

Why companies large and small trust IR35 Shield

Contact us to speak with an expert


IR35 status assessments delivered to our customers. And counting.


The average recommendation score from our customers.


The year we built and released the UK's first IR35 status tool.


Definitive IR35 status results. Inside or outside IR35, no indeterminates.


Over 20 years of experience at the cutting-edge of IR35.


Defence cost cover available with our Tax Investigation Service.

We know the details so you don't have to

We keep our finger on the pulse of IR35. You can trust our advice and guidance is always up to date.

Does IR35 apply to overseas contracts? Explaining the overseas exemptions

The off-payroll rules apply only to contracts where either the client is a UK tax resident or the work is carried out in the UK...

Read more
As a small company, should you assess your contractors IR35 status?

The IR35 reforms that came into effect in April 2021 do not affect small companies. Nonetheless, some small companies...

Read more

Success stories from businesses like yours


Markel Tax has been providing advice and guidance on IR35 and underwriting IR35 based insurance policies for 20 years, and we are delighted to be working with IR35 Shield to help firms manage the risks associated with the new off-payroll reforms.

Paul Mason

Head of Tax Partnerships


Our clients look to us to provide straightforward access to key skills and flexible labour. IR35 Shield helps us achieve this by minimising the pain of off-payroll compliance for our clients, while effectively mitigating the risk for all parties in the supply chain.

Kelly Futcher

Head of finance

Read the case study
Professional Passport

IR35 Shield's knowledge in the IR35 space is exceptional. Our firm, Professional Passport, delivers compliance across the recruitment sector and we are strongly recommending both agencies and clients use IR35 Shield as a way to manage their ongoing IR35 compliance process.

Crawford Temple

Chief Executive Officer

Brownlee Dean

IR35 Shield is both efficient and user-friendly, and it demonstrates reasonable care, providing us and our clients with the necessary assurance. Companies with turnover exceeding £100m that are engaging dozens of contractors are naturally risk-averse, so providing this assurance is crucial.

Pete Walker

Managing Director

Read the case study
Anderson Anderson & Brown

IR35 Shield has enabled us to carry out accurate status assessments in bulk, evaluate contract terms and working practices, and satisfy clients and contractors through collaborative assessments. These, along with the additional insights and features provided, have proven invaluable for our service offering.

Steven Fraser

Partner, global payroll & employment taxes

Read the case study

Having adopted IR35 Shield as our compliance solution, it’s essentially been business as usual for us. We just open the tool, complete assessments as and when we need to and put the compliance observations into practice. The administration involved is minor. It’s almost as if the off-payroll reform never happened.

David Nottage

Talent Attraction & Acquisition Manager

Read the case study
Tax Networks Ltd

We have worked collaboratively with the creators of IR35 Shield on IR35 tax cases, winning an appeal at the tribunal with their assistance in 2019. Their knowledge and expertise in this area is exemplary and is clearly reflected in the detailed and comprehensive manner in which they conduct status assessments.

Chris Leslie

Tax Advisory (HMRC Dispute & Resolution)

La Fosse Associates

IR35 Shield has enabled us to offer an added value service that we otherwise would not have been able to provide to our clients. By underpinning our compliance offering, it has strengthened our reputation, while its own reputation has helped us get our clients on board with minimal fuss.

Katherine Miller

Head of legal and audit

Read the case study

IR35 Shield has been invaluable for us from day one. It is an inclusive and brilliantly robust solution that is accessible, easy-to-use and well-supported, helping us better manage IR35 status assessments.

Amelia Gregson

Talent Acquisition Specialist

Read the case study
  • UK FinTech finalist 2021 for Accounting Tech of the Year logo
  • Tolleys Taxation finalist for best digital innovation 2019 logo
  • IR35 Shield are proud to be a Professional Passport supply partner
  • UK IT Industry awards computing finalist 2019 logo
  • Digital Technology leaders awards finalist 2019 logo
  • Financial Times logo
  • The Telegraph logo
  • The Guardian logo
  • Taxation logo
  • Computer Weekly logo
  • Recruiter logo