French is spoken by around 320 million people worldwide according to the Organisation internationale de la Francophonie, and every single one of those conversations opens with a decision English speakers never have to make: tu or vous. There is no neutral option. You commit to a relationship before you have finished your first sentence, and the choice carries information about respect, distance and age that English packs into tone of voice instead.
What is the actual rule for tu and vous?
Use vous for distance and tu for closeness, and when the situation is ambiguous, start with vous and let the other person downgrade it. That is the whole rule. Everything else is detail about what counts as distance.
Vous is expected with:
- Anyone you have just met, whatever their age
- Anyone noticeably older than you, even socially
- Shopkeepers, officials, doctors, landlords, anyone serving you professionally
- Your boss, your client, and most colleagues on the first day
Tu is normal with:
- Friends, family, partners, children, pets
- Fellow students and people your own age in casual settings
- Colleagues at your level, in most companies, after the first few days
One thing that surprises learners: vous is also the plural you. So vous pointed at a group of close friends is not formal at all, it is simply the only option available.
How does this work in a French office?
Most French workplaces run on tu between colleagues and vous upward and outward, but the line moves by industry, and the safe move is to mirror what is said to you. A startup in Paris may be entirely tu by lunchtime on day one. A bank, a law firm, a ministry or a traditional family business will keep vous for years, sometimes permanently, even between people who like each other.
Useful lines to have ready:
- On peut se tutoyer ? Can we use tu? The standard way to propose the switch
- Je vous en prie, tutoyez-moi. Please, use tu with me. How someone senior grants it
- Je préfère qu'on reste au vous, si ça ne vous dérange pas. I would rather we stay on vous, if you don't mind. Rare, but it exists and is not an insult
The direction matters more than the words. The invitation comes from the older or more senior person, and going the other way, insisting on tu with your director in a formal company, reads as either naive or pushy.
What does getting it wrong actually sound like?
The two mistakes are not equal: an unnecessary vous sounds slightly stiff, while an unearned tu sounds careless. That asymmetry is why vous is the correct default when you cannot read the room.
| Situation | Wrong choice | What it sounds like | Safe choice |
|---|---|---|---|
| Buying bread | Tu as des baguettes ? | Overfamiliar, slightly rude | Vous avez des baguettes ? |
| Talking to a colleague your age, week two | Vous everywhere | Cold, keeping distance on purpose | Tu, once they used it with you |
| Emailing a client | Tu peux m'envoyer le devis ? | Unprofessional | Pourriez-vous m'envoyer le devis ? |
| Meeting your partner's grandmother | Tu | Presumptuous | Vous, until she offers otherwise |
There is also a grammatical trap. Once you switch, everything switches: the verb, the possessive, the pronoun. Ton adresse against votre adresse, chez toi against chez vous. Learners commonly switch the verb and forget the rest, which produces half-sentences like vous as ton billet, and that is the version that genuinely confuses people rather than just sounding formal.
Conclusion
The rule is simple to state and awkward to feel, because it is not really grammar, it is social calibration, and it only becomes automatic once you have been corrected a few times in a low-stakes conversation. That is the part a textbook cannot give you. If you want to practise the switch, the office version, the in-law version, the moment where someone offers you tu and you have to reply without freezing, book a free trial lesson at frenchwithyann.com and we will run through the real situations you are about to be in.
Common questions
What happens if I use tu by mistake?
Almost nothing. A learner who says tu to a shopkeeper is corrected gently or not at all, because your accent already explains it. The mistake that lands badly is tu used by someone who clearly knows better.
How do I ask someone to switch to tu?
Say On peut se tutoyer? (Can we use tu?). It is a normal, friendly question, and almost nobody says no. The older or more senior person is the one who should offer.
Do French people use vous with their in-laws?
Some families do, some do not, and it varies by region and generation. Listen to what your partner says to them and copy it, that is the safest guide.