Formal speech style is a type of speech used in formal, serious situations such as the workplace or a dinner party. It is characterized by the use of standard English, more complex sentence structures, infrequent use of personal pronouns, and lack of colloquial or slang terms. Formal language tends to be impersonal and precise, and the use of pronouns is restricted. The choice of formal or informal style will depend on the assignment itself, its subject, purpose, and audience.

There are different types of speech styles, including frozen, formal, consultative, casual, and intimate. Frozen style is used in very formal settings, such as national pledges, anthems, and school creeds, and does not require any feedback from the audience. Formal style is used in speaking to medium to large groups, and may also be used in single hearers, strangers, older persons, and professionals. Consultative style is used in semi-formal communication and happens in two-way participation. Casual style is used between friends and is often very relaxed and focused on just getting the information out. Intimate style is used in private conversations between close friends or family members.