Manage your whole supply chain easily with IR35 Complete™


Tailored support from our IR35 experts to your agency


Fast & easy IR35 assessment tool with insurable outcomes


Everything you need to comply with IR35


Seamless management of contractors throughout the supply chain

Our In-house Assessment Tool

The most powerful assessment tool on the market
  • Fair decisions – more correct ‘outside’ determinations vs CEST.
  • Cost-effective – great commercial offering for our customers.
  • Speed – fastest tool on the market, completed in minutes.
  • Decisive –  delivers definitive answers quickly with no need for manual review.
  • Branded – take hirers and workers on a branded journey .
  • Integrated – integrate our tool into your CRM.
  • Automated workflow – reduces time chasing SDSs.
  • Insurable – we can insure you against investigations and tax losses.
Get in touch with our IR35 experts to let us assess a sample of your workforce.

Our Solutions

We offer a range of payment solutions to suit all circumstances

Your IR35 Project Plan

It’s important to ensure you are properly prepared for IR35 reforms. Our IR35 experts are here to help every step of the way.

Click on each phase to find out more.

Phase 1


Phase 2


Phase 3

Ongoing Support

Simple Switching

If you have a large number of contractors who need to switch to Umbrella, let us help.

We have significant experience in handling large migrations smoothly and efficiently, reducing risk and hassle for your agency and
ensuring a positive experience for your contractors. We can:



  • Provide a clear project plan, communications, and tailor reporting to your requirements throughout the transition.
  • Quickly deliver accurate pay illustrations and explain how pay is calculated.
  • Run webinars and Q&A sessions so that everyone understands what’s happening.
  • Provide a smooth and positive onboarding experience for contractors joining our Umbrella.
  • Draft clear and accurate communications for workers for dissemination by your agency – saving your time.
  • Provide references from agencies with regards to our large transitions/migration projects.

Your experienced team

We have a team of specialists who are on hand to help your agency prepare.

Any technical or compliance-related questions can be answered by Chris James, Director of Accountancy Services and Chairman of the FCSA. While any queries you may have about the assessment tool and how it works can be answered by Del Williams, our Sales Director.

“The JSA team were highly knowledgeable, […] they were also great at communicating the complexity of IR35 and helping us to understand how the legislation relates to our business” – Crystal Metcalfe (Vice President)


Professional and efficient

Having worked with a number of umbrella companies over the years, Vicky Traynor and the team JSA stand out from the crowd due to the professional and efficient service that they provide to agencies and contractors.

Matt Randall

Fantastic team

I have been working with JSA for a while now more specifically with Maria Constantinou and their services are really amazing. The team is fantastic but I would like to say a big thank you to Maria for going the extra mile and assisting

Ernesto Gomes


Download Our Guide

If you are a recruitment agency and would like to know more about how you could be affected by the upcoming off-payroll (IR35) reforms, please download our comprehensive guide, outlining where you’re liable and how we can help.

IR35 assessment and liability for tax

In this short video, we help you make sense of responsibility for IR35 assessment and liability for unpaid tax.

What makes a good IR35 assessment?

In this short video we explain what makes a good IR35 assessment.

Begin Our IR35 Assessment Masterclasses

IR35 assessments and Status Determination Statements are integral parts of the new IR35 (off-payroll) reforms. To learn everything you need to know about IR35 assessments, download our free masterclasses.


The Systems Behind the Software

The Systems Behind the Software

When it comes to IR35, meeting the compliance requirements from the outset is essential for agencies to help avoid facing financial liability. We’ve developed a solution – IR35 Complete.

read more
HMRC Update on End User Liability

HMRC Update on End User Liability

New HMRC guidance outlines the supply chain compliance risks and details the checks that end-users should undertake to prepare for the upcoming IR35 reforms.

read more
Our Sample IR35 Project Plan

Our Sample IR35 Project Plan

Guarantee your agency is completely prepared for the IR35 reforms by implementing a thorough project plan. We’ve created one to help you operate compliantly. Click here to find out more.

read more

We'd love to hear from you

Call us on 01923 257 257 or Request a callback