How the UK-Australia Double Tax Treaty Works
If you have income, assets, or connections in both the UK and Australia, you've probably wondered whether you'll be taxed in both countries - and whether there's anything you can do about it.
The answer lies in the UK-Australia Double Tax Agreement (DTA). This treaty, in force since 1968 and updated in 2003, sets out which country gets to tax which types of income — and how double taxation is prevented when both countries have a claim. Understanding it is essential for anyone moving between the two countries, owning property in both, or receiving income from one while living in the other.
This guide explains how the treaty works in plain English.
What Is the UK-Australia Double Tax Agreement?
The UK-Australia Double Tax Agreement is a bilateral treaty between the United Kingdom and Australia that determines taxing rights over various types of income. Its primary purpose is to prevent the same income from being fully taxed twice — once by each country - when an individual has connections to both.
The treaty covers a wide range of income types, including employment income, rental income, dividends, interest, royalties, pensions, and capital gains. For each type, it sets out which country has the primary right to tax, and how relief is given in the other country.
The DTA does not override domestic tax law in either country. Rather, it sits alongside it - stepping in to limit or eliminate tax that would otherwise be due under each country's own rules.
Who Does the Treaty Apply To?
The UK-Australia Double Tax Agreement applies to individuals who are tax residents of one or both countries. It is relevant to you if you:
Live in the UK but receive income from Australian sources, such as rental income, dividends, or superannuation
Live in Australia but receive UK income, such as salary from a UK employer, UK rental income, or a UK pension
Have recently moved between the two countries and have income or assets in both
Are uncertain whether you are a UK or Australian tax resident, or believe you may be resident in both
The treaty does not apply to individuals who are not tax residents of either the UK or Australia.
How Does the Treaty Prevent Double Taxation?
The UK-Australia DTA prevents double taxation in two main ways:
1. Allocating exclusive taxing rights
For some types of income, the treaty gives one country the exclusive right to tax. This means the other country cannot tax that income at all, removing the risk of double taxation entirely. Certain government pensions, for example, are typically only taxable in the country that pays them.
2. Providing a tax credit
For other types of income, both countries may have the right to tax, but the country of residence is required to give credit for the tax paid in the source country. This means you do not pay full tax twice — the tax paid in one country reduces the tax due in the other.
The specific mechanism depends on the type of income. We cover the most common categories below.
Income Types - How the Treaty Applies
Employment Income
Employment income is generally taxable only in the country where the work is physically performed. If you work in Australia, Australia taxes your employment income. If you work in the UK, the UK taxes it.
If you work remotely for a UK employer while living in Australia, the employment income is typically taxable in Australia — not the UK. This is a common source of confusion for Australians working remotely for UK companies.
UK Rental Income
UK rental income is always taxable in the UK, regardless of where you live. If you are also an Australian tax resident, Australia may also include the rental income in your Australian tax return, but a credit is generally available for the UK tax already paid — preventing double taxation.
As a UK non-resident landlord, you also have the option to receive your rental income gross (without UK tax withheld at source) by registering under HMRC's Non-Resident Landlord Scheme.
Australian Rental Income
Australian rental income is always taxable in Australia. If you are a UK tax resident, HMRC may also seek to tax it, but a credit for Australian tax paid is generally available under the treaty.
Dividends
Dividends are generally taxable in the country where you are a tax resident, but the source country also retains limited taxing rights. Under the UK-Australia treaty, the source country can withhold tax on dividends, but this is limited — typically to 15%, or 5% for significant corporate shareholders.
The country of residence then gives credit for the withholding tax, so the total tax burden reflects your marginal rate in your country of residence rather than full double taxation.
Interest
Interest income follows a similar structure to dividends. The source country can tax interest, but at a reduced rate under the treaty. Your country of residence taxes the interest and gives credit for source country tax paid.
UK Pensions
A distinctive feature of the UK-Australia Double Tax Agreement is the treatment of pensions. Unlike many other UK tax treaties, the UK-Australia DTA covers all pensions — including government service pensions — under a single rule: pensions are taxable only in the country of residence of the recipient.
This means that all UK pensions — whether the State Pension, private or occupational pensions, or government service pensions such as civil service, NHS, armed forces, or teacher pensions — paid to an Australian tax resident are taxable only in Australia. The UK has no taxing rights on these pensions once the recipient is an Australian tax resident.
In practice, HMRC may initially withhold UK tax on pension payments to non-residents, so it is important to notify both HMRC and your pension provider of your Australian tax residency to ensure the correct treaty treatment is applied.
Capital Gains
Capital gains on UK property are taxable in the UK for non-residents under UK domestic law — irrespective of where you live. Australia may also seek to tax UK property gains if you are an Australian tax resident, but a credit for UK Capital Gains Tax paid is generally available.
For other assets, the treaty generally gives primary taxing rights to the country of residence, with some exceptions for certain types of property and business assets.
Superannuation
Australian superannuation is not specifically addressed in the UK-Australia treaty in a way that provides clear relief in all cases. The tax treatment of superannuation withdrawals for UK residents depends on HMRC's view of the payment and the nature of the fund. This is one of the most complex areas of UK-Australia cross-border tax and specialist advice is strongly recommended before accessing superannuation as a UK resident.
Tie-Breaker Rules - What If You Are Resident in Both Countries?
It is possible to be treated as a tax resident in both the UK and Australia at the same time under each country's domestic rules. When this happens, the treaty's tie-breaker provisions apply to determine which country is treated as your primary country of residence for treaty purposes.
The tie-breaker test works through the following steps, in order:
Permanent home - you are resident in the country where you have a permanent home available. If you have a permanent home in both countries, or in neither, move to step 2.
Centre of vital interests - you are resident in the country with which your personal and economic ties are closer — where your family lives, where you work, where your bank accounts and social connections are.
Nationality - if the centre of vital interests cannot be determined, you are resident in the country of which you are a national.
Mutual agreement - if you are a national of both countries, or of neither, the tax authorities of both countries determine the matter by mutual agreement.
The tie-breaker only applies for treaty purposes. It does not change your domestic tax residency status in either country — it simply determines which country's treaty benefits apply.
What the Treaty Does Not Cover
It is important to understand the limits of the UK-Australia Double Tax Agreement:
The treaty does not eliminate all UK or Australian tax obligations - it allocates and limits them
It does not remove the need to file tax returns in one or both countries
It does not cover all taxes - for example, Australian stamp duty and UK Inheritance Tax are not covered
It does not automatically apply - you must claim treaty relief where relevant, and in some cases file elections or notifications with HMRC or the ATO
Common Mistakes to Avoid
Assuming the treaty eliminates all tax obligations
The treaty prevents double taxation - it does not mean you pay no tax. Most individuals with cross-border income still have filing obligations in one or both countries.
Assuming residency in one country ends obligations in the other
Moving to Australia does not automatically end your UK tax obligations, and vice versa. You may still have filing obligations in the country you have left if you continue to receive income sourced there.
Not claiming available relief
Treaty relief does not apply automatically in all cases. For some types of income, you need to actively claim it — either in your tax return or by making a formal election. Failing to claim can result in paying more tax than necessary.
Getting superannuation wrong
The UK tax treatment of Australian superannuation is poorly understood and frequently handled incorrectly. Taking advice before accessing your super as a UK resident is strongly recommended.
Frequently Asked Questions
Does the UK-Australia Double Tax Agreement stop me being taxed twice?
In most cases, yes. The treaty either allocates exclusive taxing rights to one country, or requires the country of residence to give credit for tax paid in the source country. However, it does not eliminate all tax — it prevents double taxation, not all taxation.
Do I still need to lodge a tax return in both countries?
Potentially. The treaty reduces or eliminates double taxation, but it does not automatically remove filing obligations. You may still need to file a UK Self Assessment return and an Australian income tax return, depending on your circumstances.
What is the difference between the DTA and domestic tax law?
Domestic tax law is each country's own tax legislation — the Income Tax Act in the UK, and the Income Tax Assessment Act in Australia. The DTA is a treaty between the two countries that modifies or overrides domestic law where it provides a better outcome for the taxpayer. You apply domestic law first, then check whether the treaty provides relief.
Does the treaty cover Australian superannuation?
Not explicitly. Superannuation is one of the most complex areas of UK-Australia cross-border tax and is not clearly addressed in the treaty. Specialist advice is essential before accessing superannuation as a UK resident.
Can I claim treaty relief myself or do I need an adviser?
For straightforward cases - for example, claiming a credit for foreign tax paid in your annual return - you may be able to claim relief yourself. For more complex situations, such as dual residency, pension taxation, superannuation, or property disposals, specialist advice is strongly recommended.
Need Help Applying the Treaty to Your Situation?
The UK-Australia Double Tax Agreement provides important protections for individuals with cross-border tax obligations — but applying it correctly requires a solid understanding of both UK and Australian tax law, and how they interact.
AUK Tax specialises exclusively in UK and Australian cross-border personal tax. We prepare UK Self Assessment returns and Australian income tax returns under one engagement, applying treaty relief correctly and ensuring your overall tax position is handled consistently across both jurisdictions.
This article is intended as general guidance only and does not constitute tax advice. Individual circumstances vary and the rules around the UK-Australia Double Tax Agreement, tax residency status, and cross-border income are complex. Please contact AUK Tax for advice tailored to your situation.
AUK Tax — UK and Australian personal tax specialists. Offices in London and Sydney.