[Grammar pattern] V(ない) + なくちゃ: Meaning and Example Sentences

A grammar pattern used to express a requirement or obligation to do a certain action.
It is a short form of the pattern "V(ない) + なくてならない" and is often used in casual conversation with family members or close friends.

母(はは)に怒(おこ)られるから、18時(じ)までに家(いえ)に帰(かえ)らなくちゃ。

I have to be home by 6 p.m. or my mom will get mad.
明(あ)日(した)は漢(かん)字(じ)テストがある。寝(ね)る前(まえ)に漢(かん)字(じ)を覚(おぼ)えなくちゃ。

There’s a kanji test tomorrow. I need to memorize the kanji before I go to bed.
このりんご、ちょっと黒(くろ)くなっているね。早(はや)く食(た)べなくちゃ。

This apple is a bit brown. I need to eat it soon.
セールが終(お)わる前(まえ)に、デパートへ買(か)い物(もの)に行(い)かなくちゃ。

I have to go shopping at the department store before the sale ends.
お金(かね)が足(た)りない。ＡＴＭでお金(かね)を下(お)ろさなくちゃ。

I don’t have enough money. I need to withdraw some from the ATM.