A financial adviser or financial advisor is a professional who provides financial services to clients based on their financial situation. In many countries, financial advisors must complete specific training and be registered with a regulatory body in order to provide advice.

Relationships between clients and financial advisors can be characterized by principal-agent problems, as financial advisors may possess information and conflicts of interest that lead to dishonest advice and misconduct.

Financial advisors provide a broad range of services that may include investment advice, retirement and estate planning, wealth management, tax‑efficient strategies, insurance solutions, and holistic financial guidance, depending on their licensing, credentials, and scope of practice.