Boost your tax 

Learn from experienced tax professionals to build your skills in tax advisory, international tax and transfer pricing.
Write your awesome label here.

Why study ADIT with us?

ExtraTax Training is recognised by the UK's Chartered Institute of Taxation as a course provider for the Advanced Diploma in International Tax (ADIT) qualification. We support you on your journey to becoming an International Tax Affiliate of the CIOT:
  • Flexible online study options
  • Enthusiastic and engaging tutors
  • Excellent customer satisfaction
  • Live classes in small groups
  • Proven exam success strategies

What is ADIT?

Here's what the CIOT say:

The ADIT qualification is a highly respected international tax learning programme, with students in over 120 countries worldwide. Designed by world-leading experts, it is a challenging and rigorous qualification that will reward you and your career.  

Why study ADIT?

As the first person in Ireland to gain ADIT status, I know the benefits of ADIT and am a huge supporter of the qualification. My aim with ExtraTax is to help tax professionals around the world to develop their careers by achieving ADIT - Catriona Loughran, Founder, ExtraTax Training

The Advanced Diploma in International Taxation opens doors, garners respect, and gives you confidence. It is hard work but it's valuable.

Tax Partner,
International Law Firm

Completing the ADIT qualification and becoming an International Tax Affiliate of the Chartered Institute of Taxation has been central to my development as a specialist in international taxation.

Senior Manager,
In-house Transfer Pricing Team

After the ExtraTax course, I am not only feeling ready for the exam, but also see extreme improvements in my technical expertise that I can apply right away in my job.

Graduate Trainee,
Boutique Tax Firm

Want to find out more about the ADIT International Tax qualification? We can help!

Contact us

We're here to answer your questions.

Whether your question is about ADIT or tailored tax training for you and your team, the ExtraTax team is happy to help. 

Check out the answers to Frequently Asked Questions

How do I achieve ADIT status? What are the benefits of ADIT? Should I study ADIT or CTA? How long does it take to study ADIT? Find the answers to these questions and many more...

Find the answers to your ADIT questions in our blog.

Our blog will help you on your ADIT journey - from where to start with ADIT to finding the best study resources and tips for passing your ADIT exams.

Online ADIT courses


Customer Reviews

Since launching in 2020, we have delivered courses to tax professionals from over 25 countries around the world. Here's what they told us about the ExtraTax experience:

Transfer Pricing Manager

United States
Exactly what I needed to be prepared for the ADIT Transfer Pricing exam! The instructor was fantastic and gave a lot of great, practical tips for the exam. I always felt comfortable asking questions during class. ExtraTax genuinely cares and wants everyone to succeed!

Tax Specialist

What I found valuable during the ExtraTax training courses for my Principles of International Taxation and Transfer Pricing modules - the guidance on how to approach a variety of exam questions, how to manage time and how to strategize during an exam session. 

Tax Manager

When I joined the ExtraTax course for ADIT Module 2.09, I had no previous UK tax knowledge at all. Not only did the course help me understand the cross-border aspects of UK tax, I got a bonus and learnt plenty about UK domestic tax.

Book online today!

Join us for the June 2023 ADIT exam sitting

Meet our team

All of our instructors are highly qualified tax professionals, with practical experience in international tax. With the help of their real world examples, you will learn how to apply your knowledge, helping you to succeed.
Write your awesome label here.

Catriona Loughran

Founder and Managing Director
Write your awesome label here.

Patricia Browne

Head of Tax Training

Write your awesome label here.

Kristen Gillanders

Business Development Manager

Looking for tailored tax training?

We offer training to tax professionals and businesses in UK, Irish and international tax. 

Contact us

We are happy to answer your questions.


55-59 Adelaide Street, Belfast, BT2 8FE, UK

Phone Number

+44 (0)28 9590 5990