If the grammar is that simple, why is Vietnamese hard?

Because difficulty in a language is not concentrated in grammar. Vietnamese removes almost everything English speakers dread — there is no conjugation, no case, no gender, no plural marking, and the alphabet is Latin. It replaces all of it with a sound system that is denser than English in every dimension: six tones, a large set of vowels including ones English does not distinguish, and consonants at the ends of syllables that are not released. The work is all in the ear and the mouth, and neither responds to studying.

How many tones does Vietnamese have?

Six in the northern standard, five in most southern speech, and they are marked in the spelling — which is a real advantage over Chinese, where tone must be memorised separately from the character. The difficulty is not knowing which tone a word has; it is producing and hearing the difference at conversational speed. Tone errors do not produce an accent, they produce a different word, and the tonal minimal pairs in Vietnamese are numerous enough that guessing from context fails often.

Is Vietnamese related to Chinese?

Not by descent — Vietnamese is Austroasiatic and Chinese is Sino-Tibetan, and our model treats them as unrelated. What they share is a long history of contact: a large layer of Vietnamese vocabulary is borrowed from Chinese, and both are tonal and largely isolating in structure. A Mandarin speaker will recognise vocabulary and will find the tonal system familiar as a concept, while the tones themselves are different and the alphabet has to be learned from scratch.

Should I learn northern or southern Vietnamese?

Decide before buying materials, because the differences are audible from the first lesson. Northern speech, centred on Hanoi, is the basis of most textbooks and the broadcast standard. Southern speech, centred on Ho Chi Minh City, has fewer tone distinctions and different pronunciations of several consonants, and it is what most overseas Vietnamese communities speak. Neither is more correct. Materials for one will mismatch conversations in the other, and that mismatch is more disruptive at the start than later.

Why is the alphabet full of accent marks?

Because the Latin alphabet was adapted to a language with far more vowel distinctions and six tones than it has letters for. Marks below and beside a letter distinguish vowel quality; marks above it carry tone. A syllable can therefore wear two different marks doing two unrelated jobs. It looks cluttered and it is genuinely useful — unlike Chinese characters, Vietnamese spelling tells you the tone explicitly, which removes an entire category of memorisation.

How long does it take to learn Vietnamese?

The US Foreign Service Institute places Vietnamese in its 1,100-hour band and marks it as usually harder than others in that group, which our model prices at about 1,265 class hours to professional proficiency. At an hour a day with a tutor, conversational Vietnamese (B1) takes around two and a half years. The grammar is genuinely simple — no conjugation, no cases, no plurals, no gender — and the alphabet is Latin. Six tones and a vowel system far denser than English is where every one of those hours goes.

FSI baseline: 1100 class hours
Difficulty band: hard
FSI category: Category III / Category IV

Vietnamese sits in the Foreign Service Institute's third tier — 1,100 class hours — and carries FSI's marking for languages usually harder than others in the same group. Our model prices that at about 1,265 hours to professional proficiency.

That extra 15% is our estimate, not a published figure. FSI flags these languages and does not publish a separate hour count for them.

The two standing warnings:

Those are classroom hours, not app minutes. Full-time small-group instruction with qualified teachers.

These hours are professional proficiency — arguing a point in your field, reading a newspaper unaided.

The grammar is the easiest on this site

This deserves stating plainly, because it is unusual and because it sets up everything else.

Vietnamese has no verb conjugation. A verb has one form, always. No tense endings — time is marked by a separate word when it matters and left out when context supplies it.

No cases. No grammatical gender. No plural marking. No articles. Word order is subject-verb-object, familiar from English.

By every measure that makes Russian or German slow, Vietnamese is the easiest language on this site — easier than Spanish. And FSI puts it at twice Spanish, with a marking saying it is harder still.

Everything is in the sounds.

Where the time actually goes

Six tones, which are words rather than accent

The same syllable said with six different pitch contours is six different words. This is not a nuance and it is not something a listener corrects for.

Vietnamese does one thing better than Chinese here: the tone is written. The spelling tells you which tone a syllable carries, so you never have to memorise it separately from the word. That removes a real burden.

What remains is production and perception, and neither is a knowledge problem. You cannot reason your way into hearing a contour distinction, and you cannot produce one you cannot hear. It takes months of listening before the six become distinct, and that clock starts when you start listening — not when you start studying.

The vowels are the underrated part

Tones get the attention. The vowel system is arguably the larger cost.

Vietnamese distinguishes considerably more vowel qualities than English, including pairs that English collapses entirely. On top of that, several syllables end in consonants that are formed but not released — your mouth reaches the position and stops — which English speakers habitually release, producing a different syllable.

The result is that a learner who has drilled tones can still be unintelligible, and often does not know why. Budget for vowels explicitly rather than assuming tone practice covers the sounds.

North or south, decided early

The two main varieties differ in tone inventory and in the pronunciation of several consonants. They are mutually intelligible and they do not sound alike.

Most textbooks teach northern. Most overseas Vietnamese communities speak southern. If your reason for learning is a specific family or a specific city, that decides it, and deciding it after six months of the wrong audio is an expensive way to find out.

What each level actually costs

Goal	Method	Estimate
A2 — simple everyday exchanges	App, 20 min/day	around 632 hours, ~5.2 years
B1 — hold a conversation	Tutor, 1 hr/day, 5 days	around 664 hours, ~2.6 years
B2 — work, study, argue a point	Tutor, 1 hr/day, 5 days	around 970 hours, ~3.7 years
C1 — professional proficiency	Intensive class, FSI-style	1,265 hours, ~12 months full-time

If you already speak a tonal language

Mandarin or Cantonese speakers get a real conceptual advantage that our model does not price, because the languages are unrelated by descent and any coefficient would be invented.

What transfers is the habit of treating pitch as lexical rather than emotional — which is the single hardest adjustment for a speaker of a non-tonal language, and it is already made. The specific tones do not transfer; Vietnamese contours are its own.

There is also a substantial layer of Vietnamese vocabulary borrowed from Chinese historically, which a Mandarin speaker will recognise in the formal and technical register.

What actually works

Front-load listening, before you can say anything. The bottleneck is perceptual and it does not respond to grammar study. This is the language where months of input before output is most defensible.
Record yourself and compare. Tone errors are inaudible to the person making them, which is exactly why they persist.
Do not celebrate the grammar. It is genuinely easy and it is about 10% of the project; treating early grammatical progress as progress in the language sets up the wall.
Pick a variety in week one and keep your materials consistent with it.

How you study matters more than which language

The same target, the same hour a day, five different ways of spending it.

Hours to B2 in Vietnamese, holding everything else equal. The slowest method that gets there takes 2× the fastest — a wider gap than the one between neighbouring FSI difficulty bands. The hatched bar never arrives at all, however many hours go into it.

Run this for your own pace

Common questions

If the grammar is that simple, why is Vietnamese hard?: Because difficulty in a language is not concentrated in grammar. Vietnamese removes almost everything English speakers dread — there is no conjugation, no case, no gender, no plural marking, and the alphabet is Latin. It replaces all of it with a sound system that is denser than English in every dimension: six tones, a large set of vowels including ones English does not distinguish, and consonants at the ends of syllables that are not released. The work is all in the ear and the mouth, and neither responds to studying.
How many tones does Vietnamese have?: Six in the northern standard, five in most southern speech, and they are marked in the spelling — which is a real advantage over Chinese, where tone must be memorised separately from the character. The difficulty is not knowing which tone a word has; it is producing and hearing the difference at conversational speed. Tone errors do not produce an accent, they produce a different word, and the tonal minimal pairs in Vietnamese are numerous enough that guessing from context fails often.
Is Vietnamese related to Chinese?: Not by descent — Vietnamese is Austroasiatic and Chinese is Sino-Tibetan, and our model treats them as unrelated. What they share is a long history of contact: a large layer of Vietnamese vocabulary is borrowed from Chinese, and both are tonal and largely isolating in structure. A Mandarin speaker will recognise vocabulary and will find the tonal system familiar as a concept, while the tones themselves are different and the alphabet has to be learned from scratch.
Should I learn northern or southern Vietnamese?: Decide before buying materials, because the differences are audible from the first lesson. Northern speech, centred on Hanoi, is the basis of most textbooks and the broadcast standard. Southern speech, centred on Ho Chi Minh City, has fewer tone distinctions and different pronunciations of several consonants, and it is what most overseas Vietnamese communities speak. Neither is more correct. Materials for one will mismatch conversations in the other, and that mismatch is more disruptive at the start than later.
Why is the alphabet full of accent marks?: Because the Latin alphabet was adapted to a language with far more vowel distinctions and six tones than it has letters for. Marks below and beside a letter distinguish vowel quality; marks above it carry tone. A syllable can therefore wear two different marks doing two unrelated jobs. It looks cluttered and it is genuinely useful — unlike Chinese characters, Vietnamese spelling tells you the tone explicitly, which removes an entire category of memorisation.

Where to study Vietnamese

Matched by the same rules the calculator uses, at a B1 target with no prior related language. The rules were written before any of these were added and the ranking code cannot read commission rates — a test rewrites every payout and checks the order does not move.

AnkiFree · Structured self-study course · up to C2earns us nothing
Anyone who needs to retain vocabulary — free, and better at spaced repetition than every paid app.
Not for: People who want a curriculum — Anki is a tool, not a course
Language ReactorFree · Structured self-study course · up to C1earns us nothing
Intermediate learners who want native input from video with dual subtitles, at no cost.
Not for: Beginners — unscripted native speech below A2 is noise, not input
Rocket Languagesabout $260 once · Structured self-study course · up to B2
Learners who want one structured course covering grammar explicitly, bought once rather than rented.
Not for: Anyone who wants live correction from a human — this is a recorded course
Pimsleurabout $150 once · Structured self-study course · up to B1
Learners who want to speak from the first lesson and can give it thirty focused minutes of audio a day, hands-free.
Not for: Anyone who wants to read or write the language — the method is almost entirely spoken

Your own target and budget change this list — run it for your case. Prices carry the date they were checked and go stale; confirm on the merchant's own site before paying.

Sources

Where the baseline figure on this page comes from. Everything applied on top of it is our own estimate.

Foreign Language Training — US Department of State, Foreign Service Institute
The class-hour bands every estimate on this site starts from, and the definition of the proficiency they lead to (ILR Speaking-3 / Reading-3).
FSI Language Difficulty Ranking — fsi-language-courses.org
Which languages sit in which band. The State Department publishes the categories as an image, so per-language assignment comes from independent reproductions that agree with each other and with the official hour bands.

By Kevin Fan. Native Mandarin speaker who learned English as a second language — the same pairing this site prices at 2,200 hours, done from the far side. Builds and maintains the estimate model and every page on it. Last reviewed 2026-08-08. How we work these numbers out, including which coefficients are our own estimates.