N4 Degree & Limitation

~なくてもいい: meaning, usage and examples

~なくてもいい means: need not do..., don't have to...

Updated 9 November 2026 · By the My Senpai team · Spotted a mistake? Tell us

Examples

1. 急いそがなくてもいいですよ。時間じかんはあります。

   You don't have to hurry. We have time.

2. 明日あしたは学校がっこうに来こなくてもいいです。

   You don't have to come to school tomorrow.

3. ここでは靴くつを脱ぬがなくてもいいですよ。

   You don't have to take off your shoes here.

4. 多おおかったら、全部ぜんぶ食たべなくてもいいです。

   If it's too much, you don't have to eat all of it.

When to use it

Says that something is not necessary: 'you don't have to do X' or 'it's fine not to do X'. Use it to release someone from a duty, to answer a request for permission, or to say what is optional. It is the natural answer to a 〜なければなりませんか question: 名前なまえを書かかなければなりませんか。いいえ、書かかなくてもいいです。

Nuance

The polite form is なくてもいいです; なくても大丈夫だいじょうぶです and なくてもかまいません sound softer. In casual speech the も is often dropped: 行いかなくていい. Said to someone else, it sounds kind, because it removes a burden.

Compare

Compare ないでください (please don't): 書かかなくてもいいです means writing is optional, 書かかないでください means do not write. Compare てもいい (permission to do): 帰かえってもいいです 'you may go home' vs 帰かえらなくてもいいです 'you don't have to go home'.

Tip: When someone asks 〜なければなりませんか, answer いいえ with なくてもいいです. ないでください would mean it is forbidden, not optional.