共稼ぎ (tomokasegi) means “dual-income family”

More examples

子どもが生まれてからも、私たちは共稼ぎを続けています。ko do mo ga u ma re te ka ra mo watashi ta chi wa tomo kase gi o tsuzu ke te i ma su

We have continued to be a dual-income family since our child was born.

Presents both partners as earning income through their own work to support one household.

共働きtomobataraki: A household in which both spouses earn income through their own work.

夫婦の双方が働いて生計を立てること。fū fu no sō hō ga hatara i te sei kei o ta te ru ko to

共稼ぎ (tomokasegi) combines 共 (tomo, "together") with the noun 稼ぎ (kasegi, "earning") from 稼ぐ (kasegu, "to earn").

Unlike co-working, which usually concerns people sharing a workplace, 共稼ぎ (tomokasegi) concerns both partners earning income even when they work in different places.