live within (someone's) means

Translations
жить по (чьим-либо) средствам
He needs to learn to live within his means.
Ему нужно научиться жить по средствам.
Definitions
To spend only as much money as one earns or can afford, avoiding debt or financial overextension.
Words
mean

noun
среднее
means

noun
средство
live

verb
жить