je hoeft niet or je moet niet? Saying you do not have to

Je hoeft niet te wachten. means that waiting is unnecessary, while Je moet niet wachten. tells someone not to wait. The small difference in form reverses the instruction.

Use niet hoeven to remove a necessity; use niet moeten when the action itself should not happen.

A useful conversion is positive moeten → negative hoeven. Je moet een afspraak maken. (You have to make an appointment.) becomes Je hoeft geen afspraak te maken. (You do not have to make an appointment.) The niet/geen choice depends on what you negate.

• Use hoeven with an explicit negative word: Je hoeft niet te bellen. (You do not have to call.) We hoeven niets te kopen. (We do not have to buy anything.)
• It also occurs with negative forms such as geen, niemand, nooit and nergens: U hoeft nergens te tekenen. (You do not have to sign anywhere.)
• A limiting word can license it too, including alleen and pas: Je hoeft alleen je naam te schrijven. (You only need to write your name.) We hoeven pas om tien uur te vertrekken. (We do not need to leave until ten.)
• As a short answer, the other action can remain unspoken: Moet ik mijn pas laten zien? — Nee, dat hoeft niet. (Do I have to show my ID? — No, that is not necessary.)

In these patterns, do not use bare positive Je hoeft te komen. If coming is necessary, say Je moet komen. If it is unnecessary, say Je hoeft niet te komen. Unlike the five core modal verbs, hoeven normally takes te before its infinitive. The perfect pattern is covered with the other te + infinitive verbs.

In Belgium, many speakers also use niet moeten with the meaning 'not have to'. Current language advice describes its status in Belgian Standard Dutch as unsettled because it is common but is also rejected by a sizeable group. For a form understood without that regional ambiguity, use niet hoeven when you mean that something is unnecessary.

• Do not translate English do not have to word for word with niet moeten when you need the general, unambiguous form. Say U hoeft niet te betalen (You do not have to pay).
• Do not drop te after hoeven: We hoeven niet te wachten, not We hoeven niet wachten. After moeten, however, the infinitive is bare: We moeten niet wachten.
• Read the scope carefully. Je hoeft de deur niet te sluiten removes the need to close it; Je moet de deur niet sluiten says that leaving it open is the better or required action.

Review modal verbs, the te-infinitive, and the bare infinitive. For the negative form itself, compare niet and geen and the position of niet.