When HMRC challenge your compliance, our expert team will take care of it

An IR35 or off-payroll investigation by HMRC can be costly and damaging to the reputation of your business. Get protected by our specialist defence team and £200k defence costs cover.

Currently being investigated? Defend your business with our IR35 defence service


IR35 status


years' IR35

Released in

The UK's first
IR35 status tool

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Trusted by thousands of proactive businesses every day

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I could not believe it was dealt with that quickly. I was pleased we chose a compliance-led solution all those years ago. The service cost is nothing compared to the peace of mind it's given us.

Marie Downes

Chief Talent Officer - Adaptive

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Worry-free protection for your business and your team

HMRC can open a compliance check at any time. Whilst you may think you are complying with the IR35 rules, HMRC investigations are still stressful, time-consuming and expensive to handle.

Don't let it escalate to a tax tribunal. Shut it down early with our Tax Investigation Service.

Are you ready for an IR35 compliance check by HMRC?

Specialist defence team

Have the comfort of being defended by a specialist team of leading IR35 experts who have extensive IR35 tribunal experience.

Communications with HMRC

Our experts will handle this so you can continue to concentrate on your business.

£200k of defence cover

Up to £200k of defence cover. Covers legal fees, costs and other expenses incurred for defending an investigation and appeal to a tax tribunal.

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Get a definitive result every time with our IR35 status tools

We lead the way with technology, introducing the first IR35 status tool in 2009. Our technological innovations make its level of detail unparalleled, and you can trust our tool to accurately determine IR35 status each and every time. We ensure our tools are always up to date by attending all the tribunals and following the latest IR35 cases.

Chat with an expert about our IR35 status tools

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

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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

Why companies large and small trust IR35 Shield

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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.

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