About Us

As R&D tax credits experts, we specialise in securing claims that are 40% above the average, with a 100% success rate. 

It’s thanks to a refreshingly different approach which we believe is unique among tax consultancies and it has proven results. 

Rather than being led by experienced accountants, our team is led by innovators who have real front line engineering and R&D experience. We’re supported by highly skilled accounting professionals and we all share a forensic attention to detail and an eye for the opportunity. 

This unique combination means we can quickly identify those projects eligible for tax relief including investments in new products, services, software and processes, freeing you up for growth.

Unique formula

Our specialist expertise means we achieve an extra boost of around 40% on the value of claims, with a 100% success rate. Understanding and identifying the qualifying projects is what we do. And most importantly we find the supporting evidence for a successful HMRC claim. 

Knowing where to look means we achieve average claims of about £54k and more. In fact with our help, our customers have been eligible to reclaim funds from £10k to £600k from their innovation investments. From agriculture to waste management and everything in between. 

Compliance with Confidence

Integrity in business is key and that’s why we are diligent in ensuring only the most robust of processes are followed. There’s the added reassurance of a stringent and fully tested checking process before claims are approved for submission to HMRC. Indemnity is also included for all our clients for additional peace of mind – although it’s never been needed.

Hand picked and high calibre

People are what makes us special. At ZLX you’ll find a hand picked team of experienced and approachable high calibre specialists. Within the skillset is front line R&D and innovation project leadership for global brands, senior level taxation planning, Chartered Accountants plus an efficient and pro-active support team.

Founder Steve McCallion has over 30 years’ experience at the leading edge of engineering innovation and business growth. From directing major projects in the oil and gas industry to heading one of the largest suppliers of robotic systems to the food and drink sector and leading the largest industrial scale company in the world, gives ZLX an unrivalled combination of experience.

National Presence

Our office team in Scotland is backed by a national network of professional partners and a growing UK-wide consultant base. We’re all fully equipped with the latest communications and conferencing technology for speed and ease of communication


Stephen & Ray, if I’m honest I never thought I’d be writing this email to you both BUT I’m ABSOLUTELY THRILLED that I am! My Finance Manager has just informed me that ZLX have made payment today of our R&D Tax Claim for the year 2018. Of all the years to have met you both and for ZLX to have delivered, as they said they would, on behalf of my Team, I would like to thank you both very much. I look forward to talking about how we approach the 2019 claim.

Managing Director

Event Production Company

ZLX promised to work alongside our accountant throughout the process, which they did. The outcome of the whole process was that we received an unexpected amount of money back from the HMRC that I was VERY GRATEFUL FOR. I would recommend any business owner to investigate the opportunity of a tax relief rebate and I would highly recommend that they put it in the hands of ZLX. ZLX were professional and ethical from the start of the process until the end.

Eco-friendly Energy Solutions

Working with Tim from ZLX was a positive experience for us. He advised, managed and completed our R&D tax claim with the minimum of fuss. This meant we could get on with the important business of managing our organisation, safe in the knowledge that our best interests were being looked after. As a result, we can highly recommend ZLX should other businesses be looking for a partner that brings expertise, efficiency and professionalism in their approach to R&D tax claims

Managing Director

Catalyst Interiors

ZLX completed our R&D Tax Relief claim, the tax saving and cash rebate that have been realised have made a massive difference to our company.

We would have no hesitation in recommending future clients to ZLX. If you are considering making an R&D Tax Relief Claim then please look no further.

Managing Director

EOS Europe

This is INCREDIBLE, AMAZING. I actually had to speak to Ray to double check the figures earlier as I was reading whilst on various Zoom calls and couldn’t quite believe the numbers!! Ongoing, I’ll be much more prepared in terms of understanding how to pull the right information together for you.

Managing Director

Production & PR company

Understanding the clients needs and scalability. Showing empathy and professionalism. Offering personalized services and valuing relationships. You will find all by partnering with ZLX.
They helped us in end to end planning and finalization of an R&D claim that resulted in maximizing our claim up-to twice as much as we had last year!

Executive Head

Currency Exchange Company

Time for a refreshing change?

There’s funding available for business growth and it’s there for the taking. Having the ‘know how’ to navigate R&D tax credits is what it takes. By adding the experience of innovation, we help businesses tap into that potential with an approach that’s as professional as it is refreshing.

Perhaps it’s time to talk to us.

Call us now on 0141 739 3377 or email [email protected] or [email protected]

Our Staff

Managing Director

Steve McCallion

Managing Director

Management Team

David Purvis

Head of Commercial Business

Andy Green

Finance & Office Manager

Hannan Khokhar

Tax Strategy Accountant

Training Team

Christina Creamer

Training Manager

Administration Team

Kirstie Burden


Charlotte McArdle

Customer Services Co-ordinator

Shari Martin

Field Co-Ordinator

Our Consultants

Find our where our consultants are based

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Bobby Horne

Kelly Davidson

Luke McCormack

Steve Marlow

Nikki Loxton

Paul Hakin

Ben Davies

Christophe Richard

Paul Duffy

Terry McIlwaine

Tim Carty

Karen Oliff

Keith Johnstone

Nick Peate

Paul Wigley

Sarmad Khan

Derek Hickling

Martin Baker

Paul Millard

Roy Schram

Simon Cleere

Adrian Leatherland

Neil Archibald

Nick Potts

Richard Morgan

Steve McLaughlin

David Egenes

Errord Jarrett

Gary Mears

Giar Fattah

Gustavo Vitolo

Ian Morrison

Jim Sykes

Mark Burroughs

Nicholas S. Patullo

Paul Griffin

Ray Jones

Richard Roy

Sunil Misra