租金 (zū jīn) literally combines 租 (zū), meaning 'to rent' or 'lease', and 金 (jīn), meaning 'money' or 'gold'. Together, they refer specifically to the money paid regularly—usually monthly—for the use of property such as an apartment, office, or shop. Unlike the English word 'rent', which can function as both noun and verb, 租金 is strictly a noun and always refers to the payment itself, not the act of renting.

This term is used in formal and everyday contexts alike, especially in housing, commercial leases, and legal documents. It is distinct from 房租 (fáng zū), which also means 'rent' but emphasizes 'housing rent' more narrowly; 租金 is broader and can apply to any rented asset (e.g., equipment or vehicles), though housing remains its most common usage. The word carries no emotional connotation—it’s neutral and transactional.