Is the 180-day limit on tourist visas in Thailand based on the calendar year or a 365-day period?

It's down to the IO at your day of arrival whether they think you taking the piss and abusing the system or not

Get a ME Tourist Visa. With careful planning you can get just short of nine months from it

With an METV you can get almost nine months in the country with two strategic border bounces. Completely legal. Calendar year totally irrelevant

This is where the real situation lies. Thai immigration officers have broad discretionary power to deny entry to anyone they believe is abusing tourist entries to live in Thailand long-term without the proper visa.

· The 180-Day "Rule of Thumb": While not a law, a common rule of thumb used by immigration is if a person has spent more than 180 days in Thailand in a 12-month period on tourist entries (whether visa exemptions or Tourist Visas), they may be flagged as a potential visa abuser.

· Pattern of Stay: It's not just the number of entries. Officers look at your pattern. If you do multiple back-to-back trips (e.g., stay for almost 60 days, leave for a week, and come back), it strongly suggests you are not a genuine tourist but are effectively living in Thailand.

· The "Proper Visa" Warning: When an officer tells you to "get a proper visa," they are referring to a long-term visa that matches your actual purpose for being in Thailand long-term, such as:

· Non-Immigrant B Visa (for business or work)

· Non-Immigrant O Visa (for retirement, marriage to a Thai national, or other dependant reasons)

· Education Visa (for studying)

· Thai Elite Visa (a long-term visa obtained through a premium membership program)

Why The Crackdown?

Thailand is cracking down on people who use tourist visas to:

· Work illegally (digital nomads, freelancers, bar workers).

· Stay indefinitely without contributing to the system (retirees who don't meet the financial requirements for a retirement visa).

· Avoid paying taxes.

Practical Advice to Avoid Being Denied Entry:

1. Keep Your Stay Under 180 Days/Year: If you want to visit frequently, try to keep your total time in Thailand on tourist entries below 180 days within a 12-month rolling period.

2. Vary Your Entry Points: If you have many recent stamps, avoid using the same land border or airport repeatedly.

3. Carry Proof of Your Intentions: When entering, be prepared to show:

· A return or onward flight ticket.

· Proof of sufficient funds for your stay (20,000 THB per person is the official requirement, but more is better).

· Proof of accommodation or a plan for your trip.

· Proof of employment or residency in your home country (e.g., a work contract, property deed, university enrollment). This shows you have reasons to return home.

4. Use a Tourist Visa Instead of Exemption: If you plan to stay for a full 60 days (extendable to 90), applying for a Single-Entry Tourist Visa (SETV) at a Thai embassy or consulate in your home country or a nearby country looks better than using a 60-day exemption stamp. It shows you planned your trip in advance.

5. Consider a Proper Long-Term Visa: If your goal is to spend most of your time in Thailand, you should seriously investigate which long-term visa you qualify for (Retirement, Marriage, Education, Elite, etc.). This is the correct and safe way to stay long-term.

In summary: immigration officers are now often stopping people with as few as 3 or 4 recent back-to-back entries and advising them to get a proper long-term visa instead of relying on tourist entries.

There is no rule that states xx number of days is or is not allowed in a year as a tourist.

That being said, immigration does not look kindly on people trying to stay long-term in Thailand without a long-term visa. The calendar year has nothing to do with it. You will not get away with doing 180 days ending in December only to return for 180 days in January.