All the services and software your business needs for IR35 certainty

Achieve total IR35 confidence with our technology and expertise. Use our tools to assess IR35 status consistently and accurately, and our experts to manage the stress of an IR35 investigation.

Get in touch to find out how we can help.

Delivered
000,000

IR35 status
assessments

Over
00

years' IR35
experience

Released in
0000

The UK's first
IR35 status tool

We are committed to your privacy and will never share your information

Trusted by thousands of proactive businesses every day

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Petrofac

IR35 Shield ensures our assessment process is robust and compliant. The added benefit of Monitoring gives us peace of mind that potential tax risks arising during contracts are easily identified and resolved.

Drew Horrocks

Head of UK TA Operations - Petrofac

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Ensure total compliance with all the right IR35 processes

We believe a robust IR35 compliance process should be detailed yet easy to manage, closely follow IR35 status case law, and crucially, be frictionless to implement.

Our unique blend of exceptional technology, protected by a team of proven experts, will safeguard your business now and in the future.

The right IR35 processes

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

Trust the right team with your IR35 Compliance

An IR35 defence team with proven experience successfully defending enquiries from inception to tax tribunal. The team’s forensic fact-finding methods have been developed from comprehensive technical input, analysis and know-how of the status domain, with the primary aim of seeking early closure.

Chris Leslie

Chris Leslie

Chris Leslie has over 30 years’ legal experience defending clients in disputes with HMRC. His years managing Status Inspectors at HMRC, combined with his specialist qualifications in analytics, give him an in-depth understanding of how to counter the arguments used by HMRC.

Dave Chaplin

Dave Chaplin

Dave Chaplin is the UK's leading IR35 authority. He consults with HMRC and government on IR35 matters, attends tax tribunals to stay current with case law, has authored two definitive IR35 books, and pioneered the first online IR35 status assessment algorithms nearly 20 years ago.

Dave and Chris’ in-depth knowledge of IR35 and Off-payroll combines to provide expert defense and guidance for your business. For help with an IR35 audit or compliance check please get in touch with our team.

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

IR35 Shield ensures our assessment process is robust and compliant. The added benefit of Monitoring gives us peace of mind that potential tax risks arising during contracts are easily identified and resolved.

Richard Mossman

Drew Horrocks

Head of UK TA Operations - Petrofac

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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NEW
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

Have you used HMRC's CEST tool?

Don't put your business at risk.

If you've used HMRC's CEST tool to determine an Outside IR35 status, flaws in the tool may put you at risk of not adhering to reasonable care. Use our simple checker tool to find out if you're affected.

Check your CEST IR35 result free

Our recent successes

IR35 Case: RALC Consulting v HMRC

The team successfully defended IT Contractor Richard Alcock at First-tier Tribunal, which defeated two barristers representing HMRC Solicitor’s Office. Chris and Dave worked together for 18 months to build the case defence before defending during a four day hearing. They succeeded in countering HMRC’s IR35 Opinion and extended time assessments with the Judge upholding RALC’s appeals.

IR35 Shield Swiftly Closes HMRC IR35 Investigation

When a long-time client of IR35 Shield received notice of an IR35 investigation by HMRC, the company turned to IR35 Shield's compliance experts for representation. Within months, the investigation was closed with no tax bill.

Ongoing enquiries

Dave and Chris are currently managing a range of IR35 enquiries and also offer consulting for businesses to help ensure their procedures and processes achieve defendable positions in light of the new off-payroll working legislation.

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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

Contact us to speak with an expert

000,000

IR35 status assessments delivered to our customers. And counting.

0.0

The average recommendation score from our customers.

0000

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

000%

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

00

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

£000K

Defence cost cover available with our Tax Investigation Service.

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