Australia-Thailand Double Tax Agreement (DTA) 2025: What Australians Living in Thailand Need to Know

The Australia-Thailand DTA (formally the Agreement between Australia and the Kingdom of Thailand for the Avoidance of Double Taxation and the Prevention of Fiscal Evasion with Respect to Taxes on Income) was signed in 1989. It allocates taxing rights between the two countries for different categories of income. For each income type, it specifies: which country has the primary right to tax, whether the other country can also tax (at a lower rate or capped rate), and whether a credit or exemption applies in the other country.

The result: if Australia taxes an income item at, say, 32.5% under Australian income tax rates, and Thailand would theoretically tax the same item at 20% under Thai rules, the DTA ensures you don't pay the full 52.5% combined — you get credit for what you paid in one country against what's owed in the other.

What the DTA does NOT do: it does not automatically exempt you from filing taxes in Thailand. Even where the DTA means no Thai tax is ultimately owed, you may still need to file a Thai personal income tax return to formally claim the exemption.

If you are an Australian tax resident employed by an Australian employer but working remotely from Thailand, Article 15 typically allocates the taxing right to your country of residence for the work performed (Thailand, if you are there 183+ days). However, if your employer is an Australian entity and you work in Thailand for fewer than 183 days in a 12-month period, Australia retains taxing rights. This is complex and fact-specific — seek qualified advice.

If you are employed by a Thai company, Thailand has primary taxing rights on that employment income, and Australia may exempt it or give a foreign income tax offset (FITO) under Australian domestic law.

Private pensions and annuities are typically taxable in the country of residence. For Australian tax residents (who remain Australian tax residents despite living in Thailand), Australian super pension payments are generally taxable in Australia. For those who have become Thai tax residents (183+ days and have severed Australian residency ties), Article 18 may shift the taxing right to Thailand. This area is highly fact-specific.

Australia taxes most superannuation fund earnings at 15% within the fund itself, before you ever draw on it. If you later take a lump sum or pension from an Australian super fund as a Thai tax resident and remit those funds to Thailand, the post-2024 remittance rule above can make the remitted amount separately assessable in Thailand — Article 18 does not clearly exempt private super payments from Thai taxation once remitted. This interaction is one of the most consequential areas to get specific advice on before drawing down super as an Australian living in Thailand.

Government pensions (including the Australian Age Pension and pensions paid to former government employees) are generally only taxable in Australia under the DTA, regardless of where the recipient lives. This is one of the clearest protections the DTA offers — if you receive an Australian government pension and live in Thailand, Thailand generally cannot tax that pension payment under the DTA.

Australia retains the right to tax Australian dividends (at a capped withholding tax rate of 15% for DTA purposes). Thailand can also tax dividends received by Thai tax residents, but a credit is given for Australian withholding tax paid. The interaction with Australian franking credits and the gross-up mechanism is complex.

Similar structure to dividends: Australia can withhold tax on Australian-source interest paid to Thai residents (capped at 10% under the DTA). Thai tax can be reduced by a credit for Australian withholding tax.

Gains from alienation of Australian real property (your Australian home or investment property) are taxable in Australia. The DTA gives Australia the primary taxing right on Australian real estate capital gains. Thailand generally does not tax Australian property gains under the DTA.

Australians who hold Thailand's LTR (Long-Term Resident) visa in a qualifying category sit outside most of the analysis above for foreign-sourced income. Under Royal Decree 743, LTR holders in qualifying categories (including Wealthy Pensioner) are fully exempt from Thai personal income tax on foreign-sourced income brought into Thailand — a full exemption with no cap on the amount remitted, not a partial deduction, for as long as the LTR visa and its qualifying conditions remain valid. For an Australian retiree or high earner who would otherwise work through the DTA-plus-2024-remittance-rule analysis above on every dollar remitted, LTR eligibility is often the more decisive question to resolve first — it can remove this entire analysis for foreign income rather than merely reducing the tax owed under it.

In Australia: the DTA relief is generally claimed through your Australian tax return — either as a foreign income tax offset (FITO) for Thai tax paid, or by following the specific exemption provisions in Australian tax law that give effect to the DTA.

In Thailand: Thai DTA relief is claimed on the Thai personal income tax return (PND 90 or PND 91). If you are a Thai tax resident and the DTA exempts a particular income type from Thai tax, you report it but claim the DTA exemption. Thailand requires the claimant to hold a tax residence certificate from Australia (available from the ATO) in some cases.

Thailand's 2024 rule change (Por. 162/2566) taxes overseas income remitted to Thailand regardless of which year it was earned — removing the earlier exemption that applied when income was remitted in a later year than it was earned. The DTA does not remove this rule — but it may reduce or eliminate the Thai tax liability for specific income types where Australia has primary taxing rights under the DTA.

Example: Australian government Age Pension remitted to Thailand. Thailand's 2024 rule would bring this in scope. But under DTA Article 19, government pensions are only taxable in Australia — so a Thai tax resident receiving their Age Pension can claim DTA relief and pay zero Thai tax on it (while continuing to pay Australian income tax in Australia as applicable).

Example 2: Australian bank interest remitted to Thailand. Article 11 allows Thailand to tax this, subject to the credit for Australian withholding. The DTA does not eliminate Thai tax on Australian interest for Thai tax residents.

1. Determine your Australian tax residency status (ATO residency tests — do not assume you automatically become a non-resident when you move abroad). 2. Determine your Thai tax residency (183+ days in Thailand in the calendar year). 3. Identify each income type you earn and receive, and map it to the relevant DTA article. 4. Engage both an Australian tax accountant and a Thai tax professional — the DTA interaction requires expertise in both tax systems simultaneously.

Key resources: the full text of the Australia-Thailand DTA is available from the ATO (ato.gov.au — search "Thailand DTA") and from the Thai Revenue Department (rd.go.th). English text available from the ATO.

General guidance only, as of June 2025. Not tax advice. The interaction between the DTA, Australian domestic tax law, and Thai domestic tax law is complex and fact-specific. Always seek qualified advice from licensed tax professionals in both countries. No outcome guaranteed.