Confused about tu vs vous? Here is the clear rule for choosing formal or informal French 'you,' plus the real social cues that tell you when to switch.
You're introduced to your French host family's grandmother, open your mouth to say hello, and freeze: is it tu or vous? Get it wrong and you might sound like you're barking orders at your boss, or worse, being weirdly formal with a five-year-old. Tu vs vous is the first real etiquette puzzle every French learner runs into, and unlike most grammar points, getting it wrong doesn't just sound off — it can genuinely read as rude.
English collapsed this distinction centuries ago; "you" works for your best friend, your landlord, and the Queen alike, so there's no built-in instinct telling you when a switch is even needed. French never lost that split, and it shows up in nearly every sentence you'll ever speak — every verb conjugation, every question, every "how are you" depends on which one you pick. Understanding the rule now, before you're standing in front of someone deciding in real time, saves you a lot of nervous hesitation.
The starting rule is simpler than it looks: tu is for people you're close to or equal to — friends, family, classmates, children, and (increasingly) casual peers your own age. Vous is for everyone else — strangers, older people, anyone in a position of authority (a teacher, a doctor, a police officer), and any formal or professional setting. Vous is also always used for plural "you," even among close friends — if you're addressing more than one person, vous is correct regardless of how well you know them.
The safest default when you're not sure is vous. Native speakers extend real grace to a learner who's too formal — it reads as polite caution, not distance. Being too casual with vous, on the other hand, can land as presumptuous, especially with someone older or in a professional role. If in doubt, start formal and let the other person invite you to switch.
That invitation has a name: on se tutoie ? (ohn suh too-twah) — literally "do we tutoyer each other?" — is the standard way a French speaker offers to drop the formality. The verb tutoyer means to use tu with someone; the reverse, vouvoyer, means to address someone with vous. Hearing on peut se tutoyer (we can use tu with each other) is a small, genuine social milestone — it means the relationship has shifted from acquaintance to something closer, and it's worth remembering as a real marker of progress, not just a grammar footnote.
The two pronouns don't just swap a word — they change the whole verb form. Tu takes the second-person singular conjugation (tu parles, tu es, tu as), while vous takes a distinct plural-style form even when addressing one person (vous parlez, vous êtes, vous avez). This is exactly where English speakers slip up most: it's tempting to treat vous like a fancier version of "you" and keep the same verb shape, but vous always pairs with the plural conjugation, whether you're speaking to one person or ten.
Here's a quick reference to keep the two straight: tu (too) — informal you, singular — used with friends, family, and peers. Vous (voo) — formal you, or plural you — used with strangers, elders, authority figures, and any group. Tutoyer (too-twah-yay) — to address someone with tu. Vouvoyer (voo-vwah-yay) — to address someone with vous. On se tutoie ? (ohn suh too-twah) — shall we use tu with each other? Comment vas-tu ? (koh-mahn vah too) — how are you (informal). Comment allez-vous ? (koh-mahn tah-lay voo) — how are you (formal).
A common mistake is assuming age alone decides it — plenty of learners default to vous with anyone over thirty and tu with anyone their own age, but context matters just as much as age. A university classmate you've never spoken to might still get a cautious vous in your first exchange; a shopkeeper who's chatted with you daily for months might eventually invite tu. Workplaces are their own puzzle too: many French offices now use tu company-wide, especially in tech and startups, while more traditional industries — law, government, banking — stay firmly in vous territory regardless of age.
There's also a generational shift worth knowing about: younger French speakers, and especially French speakers online or in casual city settings, reach for tu far more readily than their parents' generation did. A French exchange student meeting other students their age abroad will often default to tu almost immediately, where the same interaction between their parents' generation would have opened with vous. None of this erases the core rule — it just means the line has moved slightly looser with each generation, particularly among people under about thirty.
Picture this: you're at a bakery, and the person behind the counter greets you first. Because they're a stranger in a professional setting, you respond with vous: bonjour, je voudrais une baguette, s'il vous plaît (hello, I'd like a baguette, please) — note the vous baked right into s'il vous plaît. Later, at a friend's apartment, their younger sibling asks if you want coffee. Because they're a peer or close to your own social circle, tu is natural: tu veux un café ? (do you want a coffee?). The switch isn't random — it's tracking exactly who you're speaking to and how close you are.
Try it yourself. Which pronoun would you use with a train conductor checking your ticket — tu or vous? Which would you use with your best friend's little brother — tu or vous? Fill in the blank with the correct form of être: vous ___ en retard (you are late, formal). Fill in the blank with the correct form of avoir: tu ___ un stylo ? (do you have a pen?, informal). Translate to French, using the informal form: "How are you?" Translate to French, using the formal form: "Where are you from?"
Answers: a train conductor is a stranger in a professional role, so vous. A friend's little brother is a peer-adjacent, informal relationship, so tu (children are almost always addressed with tu, too). Vous êtes en retard. Tu as un stylo ? Informal "how are you" is comment vas-tu ? or ça va ?. Formal "where are you from" is d'où venez-vous ?, using the vous form of venir.
Three things to carry forward: vous is always correct for strangers, elders, authority figures, and any group, no matter how well you know one of the people in it. Tu is for friends, family, and people who've invited you to switch, usually with on se tutoie ?. And when you're genuinely unsure, defaulting to vous is the safer, more forgivable mistake. The tu-vous distinction shows up in nearly every conversation you'll have in French, so it's worth getting comfortable with early rather than working around it. Ready to practice telling the two apart? Try a round of Exercises to drill the verb forms, or browse Vocabulary for more everyday greetings that put this rule into action.