hand-to-mouth
US /ˌhænd.təˈmaʊθ/
UK /ˌhænd.təˈmaʊθ/

1.
having only just enough money to live on and nothing extra
:
•
Many families in the region live a hand-to-mouth existence.
•
After losing his job, he found himself living hand-to-mouth.
having only just enough money to live on and nothing extra