3 min read

13 Types of Business Letters (Formats / Samples / Tips)

Business Letters are any written communicative notes that are exchanged between companies and their customers, clients, or other entities that convey professional and work-related messages or information serving different purposes. Letters or business letters, for that matter, generally refer to a hand-written or typed letter of physical existence on a paper, although with the advent of technology, a virtual letter can also be taken into the same category.

Each of these letters has a definite purpose that is served, and thus the categorization is made. The extent of a letter’s formality or semi-formal approach depends on the relationship between the sender and receiver. Usually, a standard business letter format is maintained in any of its kind though minor modifications are expected.

This infographic is about standard format of a business letter.
This infographic is about standard format of a business letter.
This infographic is about full block format of a business letter.
This infographic is about full block format of a business letter.

Types of Business Letters

Let us discuss the different types of business letters, each of which fulfills different purposes:

Sales letters

Typically, a sales letter convinces a buyer or a customer to purchase a product or service. Written in an attractive manner that strikes the potential customer’s interest, a sales letter has details of the company and the service they are offering, along with advantageous points on how their product should be chosen over others. An integral part of marketing, they are written to fulfill customer prospects in general. Read more about business sales letters.

Order letters

As the name suggests, an order or purchase letter carries information about an order for a product or service. A detailed, informative structure containing exact dimensions and quantities of the desired products, and order letters can also be sent along with the due payment. It thus serves as a legal record of a transaction between the business and the vendor. Read more about business order letters.

Complaint letters

A tricky one within the scope of business letters, a complaint letter is sent with the objective to convey dissatisfaction or a grievance. The trick lies in the tone of the letter; the overall tone should be professional and stern but should also not offend the opposite party. A polite ring along the length of the letter does pay off in the business circle. Read more about complaint letters.

Adjustment letters

A letter of the response sent by or to the customer with the business side on the other end acknowledges a claim. Read more about adjustment letter writing.

Inquiry letters

Any kind of inquiry can be written out in the form of an inquiry letter. An information deficit, a missed out point, or for any other possible questions, inquiry letters are sent to businesses to sort out the gaps. The contact information of the sender is crucial so that the response letter has a legit address. Read more about inquiry letters.

Follow-up letters

A letter that aims at increasing the effectiveness of a previously implemented action is known as a follow-up letter. It can be referred to as a subsequent letter that can cover many topics, from a general thank you to an intention to speed up a process—Read more about writing follow-up letters.

Letters of recommendation

A letter written by a person to effectively increase the value of a second person to a third one in the course of a new job prospect or admission, among other things, is known as a letter of recommendation. Read More about the letter of recommendation.

Acknowledgment letters

A letter sent to acknowledge the delivery of another letter or information is an acknowledgment letter. Read more about acknowledgment letters.

Cover letter

A letter that accompanies curriculum vitae and is a precise and attractive documentation of the person and his personal and professional achievements that eventually creates an interest in the reader to go for the resume is known as a cover letter. Read more about cover letters.

Letters of resignation

A letter of resignation is written to convey the news of leaving a job to their immediate superior, giving him notice and the reason for leaving. Read more about the letter of resignation.

Application for a job

A letter that conveys one’s interest in a job stating the qualifying factors for the job accompanied by a resume is an application for a job. Read more about Application letters.


A formal statement sent by a vendor agreeing to the request for purchasing by the business at a specified price. Read more about business quotation letters.

Job appointment letter

A letter that confirms the job for an applicant along with other information like salary, date of joining, a short welcome note, etc. is known as a job appointment letter. Read more about job appointment letters.

There are several types of business letters, and the most popular are listed above. We hope you will find the given information useful in writing each type of business letter.

Keep reading