
Patron and client both describe a person connected to a business or service, but they are used in different contexts.
Use patron for someone who supports or uses a public facing place, organization, or artist. It often appears with museums, libraries, theaters, restaurants, and the arts. The word can suggest regular support, attendance, or financial backing.
Use client for someone who receives professional advice or services. It is common in law, consulting, design, therapy, real estate, and similar fields where there is a formal service relationship.
- The café values its loyal patrons.
- He is a client of a financial adviser.
A simple way to remember it is this: a patron usually supports or visits, while a client usually hires or is professionally served.
In some situations, both may seem possible, but one usually sounds more natural. A person at a concert is a patron. A person working with an accountant is a client.

