InternationalTax Lawyers

Paying tax on global wealth can be complicated. We take a proactive approach, helping you stay compliant and making sure you don’t pay more than you should.

A person filling out a tax form with a pen.

International wealth brings international tax challenges.

Our dedicated international tax lawyers can advise on bespoke international tax strategies and manage them on your behalf.

If you have assets and investments in different countries, your wealth is affected by a variety of different tax regimes, regulations, and cultural issues. Ex-pats, non-doms, and foreign nationals living in the UK are all affected by international tax law, too.

Staying legally compliant while taking advantage of all tax efficiency opportunities is complicated, time-consuming, and requires deep, technical knowledge.

We can advise on:

  • Cross-border tax planning
  • HMRC disclosures and enquiries
  • Tax compliance and completing UK tax returns
  • Using international tax treaties and conventions
  • Tax-efficient structuring of UK and cross-border investment
  • UK tax matters for individuals and families moving to or from the UK
  • Tax domicile and residence for you and your trusts, foundations and companies
  • Your obligations for disclosing financial information under the Common Reporting Standard

Speak to our expert

We have the largest private client team in the UK, our team of experts are here to provide discreet legal advice to support you and your family.

Why choose Irwin Mitchell’s international tax solicitors?

We’re well known for our international tax expertise and our team includes numerous renowned industry experts.
We have excellent contacts with the offshore finance world and with the banks, wealth managers and third-party service providers who you need to structure their assets effectively.

We have structured tens of billions of assets for a wide range of clients all over the world including entrepreneurs, businesspeople, and families with inherited wealth.

International tax often involves a wide range of related legal issues such as corporate law, property, trusts, and estates. We work closely with colleagues specialising in all these areas and more, so you’ll always get a fully comprehensive strategy, whatever your situation.

We’re here to help

Complete our enquiry form and one of our experts will contact you by the next working day.


Alternatively, you can call us now.


Our opening hours are Monday to Friday 8am to 6pm (Excluding Public Holidays).

0370 1500 100

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Making an enquiry

We have several ways you can contact us, either by completing our online contact form, by phone, or using our live chat. If you start your journey online, here are the first steps to working together.
  • contact us
    Complete our online form
    We need a few details to understand your situation and the kind of support you need.
  • Few questions
    We’ll contact you by phone
    On the call our experts will ask you a few more questions to make sure we connect you with the right legal advice from our team.
  • Appointment
    We arrange a full appointment
    Your next step is an in-depth appointment with a specialist solicitor to discuss how we could advise you.

Frequently Asked Questions

Everyone must pay UK tax on UK income, but your tax residence and domicile determine how much UK tax you pay on foreign income and capital gains.

UK tax residents who are UK domiciled pay UK tax on foreign income and capital gains.

Non-domiciled UK tax residents don’t pay UK tax on foreign income or capital gains if they amount to less than £2,000 in the tax year.

  • They chose to pay tax on a remittance basis, which is when you are taxed only on your UK income and gains. Foreign income and gains you keep out of the country won’t be taxed.
  • Certain tax reliefs or allowances apply to them.

Non-UK residents don’t pay UK tax on any foreign income. They only pay capital gains tax:

  • On UK residential property
  • In some cases, if they have previously had UK tax residence and become UK tax resident again after a limited time.

Other tax services

Our tax expertise is wide-ranging. Find out more about the other ways in which we can advise you on your tax matters, as an individual, as part of an estate, or as a business.
  • Tax residence

    More information about how tax residence can affect your tax position

  • Estate planning

    Thorough planning is essential to passing on your wealth effectively

  • International wealth structuring

    Learn more about getting the most out of your global assets

  • Tax returns compliance

    Stay compliant with all areas of tax

Recognised for excellence. Chosen for care.

  • Legal 500 Top Tier Firm UK 2026
  • Sunday Times Best Places to Work 2025
  • ePrivateClient Top Law Firms 2025
  • Chambers High Net Worth 2025