Which country is most tax friendly for remote workers? How Thailand, Portugal and Vietnam tax foreign income

Of the three countries we cover, Thailand is the most tax friendly on paper for a remote worker paid from abroad, because it taxes a resident's foreign income only when that income is brought into Thailand. Portugal and Vietnam tax residents on their worldwide income, at up to 48 percent and 35 percent. None of the three is a country that does not charge tax on foreign income once you live there.

We cover Thailand, Portugal and Vietnam only, so this is not a ranking of the world's tax systems. The DigiTao editorial team opened every source below on 2 October 2026. This page explains published rules. It is not tax advice, and your own position also depends on the country you come from.

How do digital nomad taxes work?

Being a digital nomad does not exempt anyone from income tax. Three ideas explain almost every case.

1. Tax follows residence, not your visa. Each country has its own test for when you become a tax resident, usually a number of days or a home. A tourist entry, a DTV or a D8 does not change that test. We compare those visas in which of our three countries has the easiest digital nomad visa.
2. Each country then decides what a resident owes. Some tax everything a resident earns anywhere. Others tax foreign income only in certain cases. That is where our three countries differ.
3. Your home country still has a say. Leaving does not always end your tax residence there, and where two countries both claim you, a tax treaty between them, if one exists, decides which taxes first. Our answers on being taxed twice with Thailand and on whether Portugal is still tax free go further.

How do Thailand, Portugal and Vietnam compare?

Does Thailand tax foreign income?

Only for residents, and only when the money comes in. The Thai Revenue Department defines a resident as a person living in Thailand for more than 180 days in a tax (calendar) year. A resident pays tax on income from Thailand and on the portion of foreign income that is brought into Thailand. A non-resident pays on Thai-source income only.

PwC's summary, updated on 24 August 2026, adds the date that matters: foreign-source income is taxed if it was earned in a tax year from 1 January 2024 onwards and is remitted to Thailand, in the same year or a later one. Rates run from 0 to 35 percent.

Two cautions. First, a much reported exemption for income remitted in the year it is earned or the next one is still a draft: ThaiLawOnline's tracker, last checked on 25 September 2026, says it has not been published in the Royal Gazette and changes nothing until it is. Second, the one Thai visa that carries a tax benefit is the Long-Term Resident visa, which the Board of Investment lists with a tax exemption for overseas income. Its Work-from-Thailand category asks for an average income of USD 80,000 a year over two years, and the DTV carries no such benefit. Our Thai tax guide covers the day count and what counts as a remittance.

Does Portugal tax foreign income?

Yes. PwC, reviewed on 24 July 2026, states that residents are taxed on their worldwide income at progressive rates from 12.5 to 48 percent for 2026, with a solidarity surcharge of 2.5 percent above EUR 80,000 and 5 percent above EUR 250,000. You are resident if you spend more than 183 days in Portugal in any 12-month period, or keep a habitual residence there, and residence generally starts on your first day of stay.

Portugal's reputation as a low tax destination comes from the non-habitual resident regime, which was revoked from 1 January 2024 for newcomers. Its successor, the tax incentive for scientific research and innovation (IFICI), gives a 20 percent rate on employment and professional income and an exemption on most foreign-source income for ten years, but only to people who carry out qualifying activities within eligible entities. A remote employee of a foreign company usually has no route in, as our IFICI guide explains. Start with the Portuguese income tax guide.

Does Vietnam tax foreign income?

Yes, once you are resident. PwC, reviewed on 23 September 2026, states that tax residents are taxed on their worldwide taxable income, wherever it is paid or received, at progressive rates from 5 percent to 35 percent on employment income. The top rate applies above VND 1.2 billion a year.

Vietnam's residence test is the easiest of the three to meet by accident. It counts 183 days in the calendar year or in the 12 consecutive months from your arrival, and it also treats a rented house with a definite lease term as a permanent residence. Non-residents pay a flat 20 percent on Vietnam-related employment income. Our Vietnam tax guide walks through the lease test.

So which is the most tax friendly for a remote worker?

1. If you stay under the residence threshold, all three leave your foreign income alone as far as their own resident tax goes, and your home country's rules apply. Remember that Thailand counts a calendar year while Portugal and Vietnam also count rolling 12-month periods.
2. If you become resident, Thailand is the lightest on paper, because tax depends on what you bring into the country. Portugal and Vietnam tax a resident's income wherever it stays.
3. If you qualify for a special regime, Thailand's LTR or Portugal's IFICI changes the result, but both are built for narrow profiles.

One caution for anyone who works while physically in the country. Section 41 of the Thai Revenue Code taxes income from employment or business carried on in Thailand, whether it is paid within or outside Thailand, and PwC's summary applies that wording to residents and non-residents alike. PwC describes a non-resident's taxable income in Vietnam as income received as a result of working in Vietnam. No published Thai guidance says how that applies to a remote worker paid by a foreign employer, and we do not decide it here: it is a question for a tax adviser in the country concerned.

Low tax is one criterion among several. The destination comparison tool sets it beside cost, visas and internet, and our post on the DTV and the LTR looks at the Thai special regime.

Before you act on any of this, speak to a qualified tax adviser who knows both your home country and the country you plan to live in.

Updated on 2 October 2026. Tax rules change with each budget: confirm with the official source listed below before you rely on a figure.