🇹🇼 Tax residency in Taiwan

Taiwan tax residency hinges on the day count. The number is 183: spend 183 days or more in Taiwan within a calendar year and you are a resident for tax purposes. The test is mechanical, which cuts both ways. It gives you certainty if you track your entries and exits precisely, and it gives the tax authority certainty about you if you do not. Count from passport stamps, not memory.

Ties still matter around the edges of a mechanical test. Property, family, and local accounts do not substitute for the day count, but they shape everything adjacent to it: whether another country also claims you, whether your income looks Taiwan-sourced, and how credible any "just visiting" framing is if you spend most of the year there across several years. Do not build a plan on hopping out for a week near the threshold while your life is visibly anchored in Taipei.

What residency costs is narrower than the headline rate suggests. Taiwan's regular income tax reaches Taiwan-source income only, for residents and non-residents alike. What residency changes is the mechanism: progressive brackets and an annual return, running to a top marginal rate of 40% on that Taiwan-source income, instead of the flat withholding a non-resident faces. Foreign-source income comes in through a separate charge, the Income Basic Tax (Taiwan's alternative minimum tax). It is a flat 20%, and it applies only where your foreign income for the year is at least TWD 1 million and your basic income exceeds the TWD 7.5 million exemption. A resident nomad billing foreign clients well under those thresholds owes Taiwan nothing on that income. So the 183-day line decides how your Taiwan-source income is taxed and whether the Income Basic Tax is in play at all, not whether Taiwan reaches everything you earn.

Taiwan does run incentive programmes aimed at attracting foreign professionals, with tax concessions attached to specific employment and qualification criteria. They are targeted at recruited specialists and investors, not at any remote worker who lands with a laptop, and eligibility turns on the permit and role. If you think you might qualify, verify the current programme terms directly with the Taxation Administration, Ministry of Finance rather than relying on second-hand summaries; the criteria and benefits have shifted over the years.

On US tax: there is no US income tax treaty in force with Taiwan. US citizens file US returns regardless of where they live and rely on the foreign tax credit rules to offset Taiwanese tax paid against US liability; do not plan around treaty tie-breakers that do not exist for this pair. For UK, German, and other passports, whether double-tax relief is available depends on whether an arrangement is actually in force between your home jurisdiction and Taiwan; Taiwan's agreements take a non-standard form because of its diplomatic position, so check your home tax authority's official list rather than assuming coverage either way.

A consultation with a local tax accountant is worth it in specific situations: you are near the 183-day line, you have income from several countries, you have Taiwanese clients or a local entity, or you want to know whether one of the professional incentive schemes actually applies to your permit. One session that settles your residency position is cheap compared to an audit that reopens it.

The 183-day rule is the trigger. Track your days, and treat everything else about your setup as evidence you may one day need.

This information is for educational purposes only and does not constitute legal or tax advice.