Cross-border tax refers to how your income, assets and residency are taxed across multiple countries, and how tax treaties determine where you are legally liable.

Without proper cross-border tax planning, particularly for expat tax in Australia or when considering the tax implications of leaving Australia, you may already be:

  • Paying tax in more than one country on the same income
  • Unsure where you are actually tax resident under Australia tax residency rules
  • Filing inconsistently across jurisdictions
  • Missing critical planning opportunities before or after a move
  • Relying on advisers who only understand one system

This is where costly mistakes happen.

Get expert advice

Manage your cross-border tax
end to end

Get cross-border tax advice across Australia, South Africa and the UK

Sable International provides end-to-end cross-border tax and accounting support for individuals and families with ties to Australia, the UK and South Africa. With over 30 years’ experience advising internationally mobile clients, we ensure your position is aligned across jurisdictions.

Unlike traditional firms that operate within a single country, we take full ownership of your cross-border position, aligning your tax, residency and financial affairs into one coordinated strategy.

A single, coordinated approach to your cross-border tax position

Instead of treating each country separately, we manage your position as a whole:

One strategy across all jurisdictions

No conflicting advice between countries

No duplication or gaps

A position that stands up to scrutiny from the ATO, HMRC and SARS

How we resolve cross-border tax issues

  • Eliminate double taxation

    • Avoid being taxed twice when your affairs span multiple countries. We apply the correct tax treaties and align your position so your income is taxed once, correctly.

  • Get certainty on your tax residency

    • Residency determines where you pay tax. If it is unclear, everything else is at risk. We provide clear, defensible assessments so you know exactly where you stand.

  • Structure your global income and assets properly

    • Unstructured cross-border wealth leads to inefficiency and long-term exposure. We design and implement structures that reduce tax leakage, support mobility and withstand scrutiny.

  • Plan your move before and after residency

    • Relocating without tax planning often leads to avoidable liabilities. We help you time residency, restructure assets and manage exit and entry taxes with clarity.

  • Stay compliant across multiple tax systems

    • Managing tax in more than one country is complex and time-intensive. We coordinate your filings, ensure consistency and keep everything aligned as rules evolve.

Who we help

We work with clients whose financial lives span multiple jurisdictions, including:

  • Individuals moving between Australia, the UK and South Africa
  • Expats and returning residents
  • Professionals earning income across borders
  • Investors with international assets or property
  • Business owners operating across multiple countries

Why choose Sable International

01

Over 30 years of cross-border expertise

A proven track record advising internationally mobile clients across complex tax environments.

02

Specialists, not generalists

Focused exclusively on cross-border tax across Australia, the UK and South Africa.

03

End-to-end ownership

Your entire tax position is managed and aligned across jurisdictions.

04

Strategic, not just compliant

We structure your affairs to reduce tax and support long-term planning, not just to meet obligations.

Frequently asked questions

01What determines tax residency in Australia, the UK and South Africa?

Each country applies its own rules, and they can overlap. You may be tax resident in more than one jurisdiction. We assess your position across all three and apply tax treaties to determine the correct outcome.

02Can I be taxed in more than one country on the same income?

Yes. Without proper structuring and treaty application, income can be taxed more than once. We ensure your position is aligned so this does not happen.

03When should I get tax advice if I am moving countries?

Before you move. Pre-migration planning is critical to avoid unnecessary tax exposure and to structure your affairs correctly.

04Do I need to file tax returns in more than one country?

In many cases, yes. Your obligations depend on residency, income and assets. We manage filings across jurisdictions and ensure consistency.

05Do you only handle compliance?

No. Compliance is one part of what we do. Our focus is on structuring, planning and managing your full tax position.

06How do I get started?

We assess your current position, identify risks and opportunities, and outline the next steps clearly.

Get your cross-border tax position under control

Most cross-border tax issues are only identified when a tax authority challenges your position. By then, the cost is significantly higher.

Managing tax across Australia, the UK and South Africa requires more than isolated advice. You need a position that works across borders.

We give you clarity, structure your affairs correctly and manage your tax position end to end.

Book a consultation to clarify your tax residency, reduce double taxation and ensure your position is fully aligned across Australia, the UK and South Africa.

We will assess your position and outline the next steps clearly, with no obligation.

Disclaimer

Sable International Australia provides tax and structuring advice. We do not provide financial product advice.

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