cash in hand

Adverb

not-comparable

In a manner receiving direct payment by cash, often without paying tax.

Japanese Meaning

現金で直接支払いを受ける形態、通常は非公式に行われ、税金が控除されない場合が多い / 直接手渡しされる現金収入。しばしば税務申告が行われない非公式な取引を示す

He did odd jobs and was always paid cash in hand, so he could avoid declaring the income.

彼は雑用をしていて、いつも現金手渡しで支払われていたので、所得を申告せずに済んだ。

Sense（1）

In a manner receiving direct payment by cash, often without paying tax.

I heard he's working at that restaurant cash in hand to pay the bills.