The Verdict: Need More Info
Working for an employer or clients abroad, you need a remote-work visa, not a work permit. Which one fits turns on your income and your employer's size: take our digital nomad quiz.
The Destination Thailand Visa gives five years, up to 180 days per entry, on THB 500,000 in the bank. The Long-Term Resident (LTR) Work-from-Thailand Professional visa gives ten years but needs USD 80,000 a year and a large employer.
Taking Thai clients or working for a Thai company is work in Thailand and needs a work permit, whatever visa you hold.
Neither remote route leads to permanent residence. A Thai job does, after three years of extensions.