Supercharge your IR35 compliance and minimise your risk

Cloud-driven, industry standard, insurance-backed IR35 compliance solution for business and individual contractors. Quickly and accurately prove you are IR35 compliant.

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View Products What is IR35 Shield?
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Quickly assess and prove your IR35 compliance

Our IR35 Shield solution is infinitely scalable right out of the box. Our technology is so streamlined we can accurately assess and determine the IR35 status of the entire market of over half a million UK contractors in a single morning!

Understand the impact on your workforce, fast

IR35 Shield uniquely delivers advanced analytics, providing you with instant answers to your primary concerns surrounding IR35.

What impact will IR35 have on my bottom line?

If most of my workforce are deemed inside IR35, how much will it cost me?

Can I still attract and retain key talent and remain competitive?

IR35 Shield provides you with the analytical tools you need to help make the right decisions.

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Stay compliant with full confidence

IR35 Shield is powered by our expert AI-driven assessment technology, which has been refined over 10 years along-side ever-changing UK IR35 case law. Our assessments deliver the same status as the judges rulings on all IR35 cases, giving you ultimate peace of mind.

IR35 Shield assessment displayed on a monitor

Insurance-backed solution

IR35 Shield is proud to be underwritten by leading insurers, giving you complete trust and confidence in our employment status determinations.

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What people say about us

We have known ContractorCalculator for over a decade and their knowledge of the IR35 space is exceptional. Our firm, Professional Passport, delivers compliance across the recruitment sector and we are strongly recommending both agencies and clients to use the IR35 Shield product as a way to manage the ongoing compliance requirements they will face as part of the off-payroll (IR35) reforms.

Crawford Temple

Professional Passport, Compliance

This creative initiative produced by IR35 Shield is exactly why we did not hesitate to provide insurance to enhance its value for contractors. We are now encouraging our clients to utilise this service to enable them to concentrate on making a living but at the same time provide peace of mind. Well done IR35 Shield!

Peter Blackmore

CEO Partner, Blackmore Borley, Insurance Broker

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)

over 100,000 assessments

Using our AI-driven assessment technology

over 25 years

Over 25 years software development experience

since 2009

Built in 2009 and expertly refined to align with latest IR35 legislation

Choose a product that's right for you

Whether you're an agency, corporate or contractor, we have the complete IR35 solution for you.

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IR35 Shield for Contractors

Unlimited IR35 assessments combined with insurance

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IR35 Shield for Business

Manage Off-payroll compliance for your contingent workforce

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IR35 Shield Manager

Provide valuable expertise for your clients and leverage your business