Learn Thai: what the hours really are, where Thai is actually required, and a free phrasebook

How the Thai script actually works — and why that is the whole difficulty

Thai has a reputation for being hard, and the reputation is earned in a specific and narrow way. The grammar is genuinely simple: no verb conjugation, no plurals, no tenses, no gendered nouns, broadly subject–verb–object order. Almost all of the difficulty sits in the writing system and the tones — and those two are not separate problems. They are the same problem.

The Unicode Standard’s description of the script, the technical reference every Thai keyboard and font is built against, states the mechanism plainly: Thai consonants “are divided into classes that historically represented distinct sounds, but in modern Thai indicate tonal differences”, and the tone of a syllable is then modified by the vowel signs and tone marks attached to the consonant. That is the sentence most beginner material never says out loud. The tone of a Thai syllable is not written directly. It is computed from which class the initial consonant belongs to, how the syllable ends, whether the vowel is long or short, and which of the four tone marks is present — and there are five tones but only four marks, which is exactly why the marks alone cannot be read as tones.

Three more facts from the same standard change how the script feels once you know them:

• Every consonant carries a built-in vowel. Unicode states that each Thai consonant letter “represents a syllable possessing an inherent vowel sound”, which for Thai is /o/ in medial position and /a/ in final position. So a string of consonants with no vowel written is not missing anything — it is already pronounceable. This is why Thai words look shorter than they sound.
• Some vowels are typed before the consonant they follow. The vowel glyphs that sit to the left of a consonant are, in Unicode’s words, “encoded as separate characters that are typed and stored before the base consonant character” — a deliberate break from every other Brahmi-derived script, made to match the Thai Industrial Standard keyboard convention. If typing Thai feels back-to-front at first, that is not you.
• Thai has no conjunct consonants and no independent vowel letters, the two features that make Devanagari and its relatives so dense. Compared with its own script family, Thai is the simplified one.

The UN romanization table for Thai enumerates 44 consonant characters and 57 vowel and special-character entries, and notes that “in Thai writing word division is not ordinarily indicated” — the absence of spaces that makes a page of Thai look impenetrable before the units start separating for you. For the starter phrase set and the polite particles, see our survival Thai companion guide; for the honest “how much do I even need?” question, see do you need to speak Thai?

The only hour-count with an official source — and the correction it forces

Almost every article about learning Thai cites the U.S. Foreign Service Institute, and a large share of them get it wrong in the same two ways. The current page published by the U.S. Department of State’s National Foreign Affairs Training Center, last updated 21 January 2026, sets out four categories:

Correction one: Thai is Category III, not Category IV. This guide said Category IV until 28 September 2026 and it was wrong, as is most of what is written about Thai online. Category IV on the current list is the super-hard tier, it is twice as long, and it holds five languages, none of them Thai.

Correction two: 1,012 hours does not buy fluency. The State Department states exactly what the timeline is for — “an integrated score of 3 (Speaking + Listening) on the Interagency Language Roundtable (ILR) scale”. The ILR defines Speaking level 3 as General Professional Proficiency: “able to speak the language with sufficient structural accuracy and vocabulary to participate effectively in most formal and informal conversations”. Level 2, the rung below, is Limited Working Proficiency: routine social demands and limited work requirements. Neither is near-native. Near-native is level 4 and above, and the State Department publishes no timeline for it.

The third number almost nobody quotes. The same page states that “a typical week is 23 hours per week in class and 17 hours of self-study”. Forty-four weeks at 17 hours is roughly 748 hours of work outside the classroom, on top of the 1,012 inside it — call it 1,760 hours all in, full-time, with professional instructors and a class of motivated adults. It also sets a ratio worth stealing: a little more instruction than solo study. Most people learning Thai on their own invert that completely, then attribute the plateau to the language.

The State Department also notes its Category III list “is not exhaustive”, and its timelines “can vary based on several factors, including the language learner’s natural ability, prior language-learning experience, and time spent in the classroom”. Treat the number as a planning benchmark built from one institution’s records, not a law.

A four-stage roadmap, honestly labelled

Only the top of this ladder has an official source. The three rungs below it are planning estimates drawn from how adult learners typically progress and are presented as such — no government publishes an hour-count for “ordering food confidently”.

• Survival (indicative: 40–80 hours): greetings, the polite particles, numbers, ordering, taxis, shopping, “how much?” and “where is…?” — scripted, predictable exchanges where the other person is helping you.
• Conversational (indicative: 250–400 hours): small talk, explaining a broken aircon to a juristic office, following the gist of native speech at normal speed, handling a landlord or a shopkeeper without reaching for a phone.
• Working (indicative: 600–900 hours): reading the gist of a document or a lease clause, writing a polite message, following a meeting. This is the range where the script stops being optional.
• General Professional Proficiency — ILR level 3 (published: approx. 1,012 class hours plus roughly 748 hours of self-study): the State Department benchmark above. Effective participation in most formal and informal conversation. Still not native, and still not the level at which you stop translating in your head.

Hours compound faster with daily exposure than with weekend study, and the total matters more than the calendar time it is spread across — but note that the published benchmark assumes a structured 40-hour week. A learner doing five honest hours a week is looking at years to reach the same rung, which is a scheduling fact rather than a discouraging one.

Why romanized Thai can never tell you the tone

Every learner hits this and most conclude that Thai romanization is simply sloppy. It is not sloppy — it is doing something other than what you want, deliberately and by published rule, and knowing which is a genuine shortcut.

Thailand’s official system is a transcription system: it records approximately how a word sounds. It is not a transliteration system, which would record how a word is spelled. The system began as the Royal Institute’s general system, was adopted as the United Nations recommendation in 1967 by resolution I/14, was revised and officially endorsed by the government of Thailand in 2000, and that revision was approved at the Eighth United Nations Conference on the Standardization of Geographical Names in Berlin in 2002 by resolution VIII/13. The UN’s own status report on it states flatly that “the romanization system is not reversible to its original script form”.

Then comes the note that explains your whole experience of Thai street signs. Adapted from Thailand’s own Principles of Romanization for Thai Script by Transcription Method, it reads: the four tone marks, the silencing mark and the vowel-shortening mark “are completely ignored”, and “in order to transcribe Thai words correctly one must know how to read and pronounce them”. The romanization is downstream of knowing the word. It was never an input.

The worked examples in that document are the most useful thing a beginner can see early:

• Silent letters vanish without trace. สามารถ is romanized samat — the ร is silent. พรหม is Phrom — the ห is silent. ธาตุ is that.
• Vowels appear that are not written. ปรารถนา is pratthana: the ร is silent and a [tha] is inserted. รัตนา is rattana, with a [ta] inserted.
• Hyphens are disambiguation, not syllable art. They are inserted only where a reading ambiguity would otherwise arise — สง่า as Sa-nga, บังอร as Bang-on, สะอาด as sa-at.
• Abbreviation marks are written out in full. The paiyannoi ฯ that shortens a well-known name is expanded on romanization, which is why กรุงเทพฯ becomes Krung Thep Maha Nakhon and not “Krung Thep…”.

There is a reversible standard — ISO 11940:1998 gives every Thai character a unique Latin equivalent, marks and all, so ข becomes k̄h and ฅ becomes k’h. It is built for machines round-tripping text, it is unreadable as pronunciation, and it is not what appears on Thai signage. Two systems, two jobs, neither of them the one learners want.

The practical conclusion: romanized Thai is a memory aid for words you have already heard. If you intend to stay a year or more, the script is the only representation that carries the tone, and learning to read it is the single change that most reliably fixes a stalled accent. The phrasebook further down this page is romanized for exactly the reason above — it is a starting handhold, and it is not marking tones, because the official system it follows does not.

Where Thai ability is actually tested by an official

Most reasons to learn Thai are social and practical. One is procedural, and it is documented. The Immigration Bureau’s published information sheet for residence-permit applications sets out what happens after an application is accepted: applicants are given an appointment card for an interview with immigration officers, and “the interview includes the test of the understanding of Thai language: speaking and listening”.

It is not a formality in the paperwork either. The same document lists what the Immigration Commission weighs when it decides: “income, assets, knowledge, professional expertise, relationship with a Thai citizen, national security, personality, health, the understanding of Thai language, and other appropriate conditions”. Thai ability is one of the named criteria, sitting alongside income.

The surrounding facts from the same source, because they set the timeline you would be learning against:

• An applicant must have held a Non-Immigrant visa and been permitted to stay on one-year extensions for at least 3 consecutive years up to the date of application.
• Qualifying categories are investment, working/business, humanity reasons (legal spouse, parent, or single child under 20 of a Thai citizen or an existing permit holder), expert, and extra circumstances case by case.
• The Ministry of Interior announces the annual quota in the Government Gazette, and applications run until the last working day of that year.
• Fees as published: 7,600 baht per application, non-refundable whether or not it is granted, and 191,400 baht for the residence permit if approved — reduced to 95,700 baht for the spouse and under-20 children of a Thai citizen or an existing permit holder.

Read this with its date. The copy published on the Immigration Bureau’s own site is dated December 2015 and states on its face that it is a guideline for applicants and “would be subjected to change by government policies and economic conditions”. The Thai-language element of the interview is the durable part; the fees and the quota mechanics are the parts most likely to have moved. Confirm current requirements with Immigration before acting.

What this page will not tell you. Thailand’s naturalisation route carries its own language requirement, set by ministerial regulation rather than by the sheet above. BAANLYY could not obtain that regulation in an official published form, so this guide states nothing about what it requires — a gap, said plainly, rather than a number copied from a forum. If you are weighing long-stay options short of residence, our Long-Term Resident visa guide and Destination Thailand Visa guide cover routes with no language element at all.

Measuring where you actually are: the CU-TFL

If you want a result rather than a feeling, Thailand has a standardised test. The CU-TFL — the Chulalongkorn University Thai Proficiency Test of Thai as a Foreign Language — is designed by the university’s Sirindhorn Thai Language Institute and assesses listening, reading, writing and speaking. Candidates may sit an integrated test or take individual skills separately, and results are used both by Thai institutions for admission and by learners simply benchmarking themselves.

What the institute publishes, read on 28 September 2026:

• 2,100 baht for the speaking test at the regular rate, with a 100 baht surcharge for on-site rather than online registration.
• The speaking test takes about 40 minutes, and each round is capped at 15 candidates. Once a round is chosen it cannot be changed or postponed, and anyone more than 15 minutes late is not admitted.
• A test report is valid for two years from the date of issue.
• The institute listed eight speaking rounds for 2026, running January to August, all shown as closed at the time of reading — so the calendar is worth checking early rather than assuming a rolling schedule.
• Listening, reading and writing are also administered with Chiang Mai University, Khon Kaen University and Srinakharinwirot University under the name TH-TFL. All three partner centres showed no upcoming event when this page was written.

One honest gap. The institute publishes its table of proficiency levels and descriptions only as an image on its own page. This guide does not transcribe level names from an image it cannot quote reliably — read the table at the source before you choose which skills to book.

The Education (ED) visa route, as the embassies actually write it

An accredited Thai course can be the basis of a Non-Immigrant ED visa. The useful finding here is not the visa itself — it is that different Royal Thai Embassies publish materially different checklists, and a guide that gives you “the ED visa requirements” as a single list is flattening something that is not flat.

Compare two official Ministry of Foreign Affairs missions, both read on 28 September 2026:

• Royal Thai Embassy, Pretoria publishes a concrete course rule: if the course is no longer than 5 months, study must be at least 4 days per week, 2 hours per day; if it runs longer than 5 months, at least 5 days per week, 5 hours per day. It also requires an original letter from the school on letterhead signed by an authorised person, a copy of the school’s operating licence or business registration, a police clearance certificate valid six months or more, bank statements covering the last three months, and an application form dated at least ten working days before travel. Visa validity: 90 days from issuance.
• Royal Thai Embassy, Oslo publishes neither the course-hours rule nor the licence requirement on its ED page. It states that a single-entry visa is valid for three months and that holders may be permitted to stay not exceeding 90 days on arrival.

Neither is wrong; they are each publishing their own mission’s checklist, and financial thresholds are quoted in local currency, which is why a figure copied from a third country’s embassy page is useless to you. Read the page of the mission you will actually apply through, and treat everything else — this page included — as orientation.

Two things we are not going to tell you. First, the widely repeated figure that a school must keep students above roughly 80% attendance to hold an ED visa in good standing: this guide carried that claim until 28 September 2026, and it could not be traced to any official published source, so it has been removed rather than re-sourced to another blog. Second, extension procedure inside Thailand is handled by Immigration rather than by the embassy that issued the visa, and the two publish separately. Our dedicated Education (ED) visa guide goes further on the application itself.

Choosing a school, and the one document that does the checking for you

Bangkok has by far the largest concentration of Thai language schools and private tutors, and the widest range of course intensity and price. Chiang Mai is the strongest secondary hub, with a long-established long-stay community and a lower cost of living. Phuket and Pattaya both have options, generally smaller and more resort-oriented — worth it if you are already based there rather than a reason to relocate. The city matters less than the school.

This page names no individual school, and that is deliberate. An earlier version of this guide listed around fifteen schools by name and described them as accredited. BAANLYY had not verified the status of any of them, and a status claim about a real business that nobody checked is exactly the kind of thing this site does not publish. The names are gone until they can be verified one by one.

What replaces them is better anyway, because it is a check you can run yourself in one email. The Royal Thai Embassy in Pretoria’s ED checklist requires a copy of the school’s operating licence or business registration to be submitted with the visa application. That means any school genuinely able to support an ED visa already holds that document and can send it to you. So:

On private tutors: rates of roughly 300–600 baht an hour are commonly reported by long-stay residents in the main cities. No official body publishes tutor pricing, so read that as a reported range rather than a figure with a source behind it.

Apps, and what they can and cannot do

No official body evaluates or ranks Thai learning apps, so nothing in this section has a government source behind it and none of it is an endorsement. What follows is the set most commonly used by learners in Thailand, with an honest note on what each is actually for — check current pricing and feature claims with the publisher, because they change.

• Ling — built specifically around Thai, including script practice, which makes it the most common single starting point.
• Pimsleur — audio-only, listen-and-repeat. Strongest thing available for getting your mouth moving before you can read.
• Anki with a Thai deck — spaced repetition, and the only one of these built for long-term retention rather than daily engagement.
• ThaiPod101 — a large structured audio and video library, closer to a course than a game.
• Drops — fast visual vocabulary drilling in short sessions. Vocabulary only; it will not teach you to read.

The limit is structural rather than a matter of which app you pick. An app can drill vocabulary and it can train your ear, but it cannot hear your tone go wrong in a real exchange and correct it, and it cannot put you in an unscripted conversation you have to finish. That is the gap section 02’s 23-to-17 ratio describes, and it is filled by a person, not a subscription.

Mistakes to avoid

Quick phrasebook

Search or tap a category to expand it. Start here today — and read section 04 above first, so you know what the romanization is and is not telling you.

Frequently asked