Foreigner Tax in Thailand — Personal Income Tax & Worldwide Income 2024 in Koh Samui

Same as nationwide — but some branches require a 1-2 day appointment for expats. National benchmark: Tax 0–35% progressive · Accountant THB 5,000–30,000/year.

Top picks: Chaweng (tourist, sea-view), Bophut-Fisherman's Village (digital nomads), Lamai (families), Maenam (quiet).

Standard timeline File by 31 March of the year after the tax year. Koh Samui is similar — NYC can pre-book to complete in a single day.

500 Mbps-1 Gbps fiber THB 790-1,290 · 5G in Chaweng-Bophut. Transit: Cars/motorbikes — no Grab/Bolt on the island (local taxis are expensive), motorbike rentals THB 2,500-3,500/month.

Tropical — rain Oct-Dec (NE monsoon), high season Jan-Sep

Anyone who is a Thai tax resident — present 180 days or more in a calendar year — and remits foreign income into Thailand. Under Revenue Department Order Por 161/2566 that remittance is assessable in the year received, regardless of when it was earned. Money kept offshore is not taxed.

Yes. Royal Decree 743 exempts foreign-source income — salary, dividends and capital gains — remitted by holders in the four LTR categories, and caps Thai-source employment income for Highly Skilled Professionals at 17%. Keep the LTR endorsement and remittance records with your annual filing.

If you are present 183 days or more and remit pension income into Thailand, that remittance is assessable. Most double tax agreements let you credit the tax already paid at home, and many state pensions are taxable only in the source country — check the specific treaty article before filing.