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IR35 risks in numbers. 

= 20% (of total salary) + interest + fines x 4

NB. It would be the end client liability if the contractor is engaged direct, if engaged via the agency route the liability moves to the agency on the proviso the client has demonstrated “reasonable care”.

Potential end client bill per contractor 

What do I need to help my company prepare for IR35?

Appoint a project lead and/or a steering group. Having appointed person(s) will help get the programme of tasks involved progressing more swiftly. Whether you have a project lead or steering group will depend on the size and complexity of your organisation as well as your volume of contractor use.

How can Morson help?

Our in-house experts can provide advice on the best team for you based on our own experience if required. We’ve also developed a handy IR35 process checklist which will help you design a project and risk mitigation plan independently or with the expert support of our compliance team. 

Contact to get a copy of the IR35 process checklist.   


We strongly recommend that a full review of your contractual workforce is started now, to ensure your business is prepared well in advance of the changes. Complied with our specialist partners, Weightmans LLP and Champion Contractors, follow our 5 step process to ensure your business is compliant by the 6th April 2020 deadline.

Find out more about our solutions and how we can help you prepare by contacting

The 5 steps to compliance.



What’s the first step we need to undertake?

Your first step will be to conduct an internal review of your contractor

population. This will mean asking your payroll and HR teams for details of contractor workers, your supply chain and/or your recruitment managed service partner for this information. Once collated you’ll have an understanding of the potential number of affected contractors.

If you have a complex supply chain and/or a large number of contractors you directly payroll this is an excellent opportunity to explore how partnering with a recruitment managed service provider could help to mitigate your risk.

How can Morson help?

At Morson, we’ll be able to consolidate your contractor worker engagement process – simplifying and controlling the supply chain spend and compliance adherence whilst removing the financial and legislative burden associated with directly payrolling contractors. This will give you full visibility of contractor use and through accurate data speed up the IR35 assessment process.



Now I understand my contractor population what else do I need to do?

Using your contractor information and, our sample IR35 considerations list, conduct an initial review of each contractor. From this you’ll have a draft ‘traffic light’ system of contractor statuses.

How can Morson help?

We can support you with the assessment process for roles via our approved partners Champion Contractors and Weightmans LLP. 

How do I develop my initial assessment?

From April 2020, you as the end client are responsible for confirming the IR35 status of an individual.

In our experience, the best way to develop the initial assessment is to complete a sample of mock employment status indicator (ESI) forms. To maximise the validity of this sample we recommend speaking to your colleagues who utilise contractors to fully understand the roles/disciplines. After completing these sample ESIs these can then be submitted to Weightmans LLP for review.



After I’ve submitted my sample ESIs to Weightmans LLP what happens?

Once the assessments have been submitted, Weightmans LLP will provide status reports that will identify whether the roles/disciplines fall inside or outside of scope.

It then sits with you as the end client to review this information and determine which contractors are required to complete the full IR35 assessment.

How to demonstrate ‘reasonable care’

Whilst the HMRC have suggested that role-based assessments are legitimate, it will be difficult for you as the end client to ascertain if any contractor specific factors which may be considered at an official enquiry and potentially taken in to account when confirming the overall status.

Therefore, to demonstrate ‘reasonable care’ we recommend that all contractors are provided with the opportunity to take an individual assessment.

However as this process illustrates, this decision is for you, as the end client, to make.



What’s the best way for me to engage our contractors in this process?

We’ve developed a helpful suite of communication tools to engage your contractor audience. This includes an online assessment tool for contractors. Designed to be fully audit-able, independent and easy to use this tool goes beyond the Check Employment Status for Tax (CEST) tool suggested by the HMRC.  

Instead of anyone in the supply chain being able to complete this information as per the CEST tool, our independent review controls the assessment process allowing full disclosure and considerate assessment of each individual contractor.

Importantly Weightmans’ independent review provides a final determination agreed by you the end client, with a detailed report which is accessible to the supply chain.

Contact to find out more about this assessment tool.


Where do I start?

Download our IR35 guide.

The countdown to IR35 is on. Don’t get caught out.

Morson and our specialist partners are experts at helping end clients through legislative changes.

We’re here to support you. Download our IR35 guide to...

  • Understand what's changing
  • How it will affect your business
  • What you need to do to prepare
  • How Morson can support you