There may be no more comically vague term in the entire business world than the word "business." It means so many things that it really means nothing—and yet here you are, wondering how to write a business letter.Â
You could argue that any letter composed in a business setting counts as one, and you'd be more or less correct. But with such a wide range of applications, how are you supposed to get it right? Whatever your purpose, there are certain rules, expectations, and formatting specs you need to know. Here's how to write a business letter of just about any type in a way that gets the job done.
If you're only looking for a refresher, here's the short version (keep scrolling for more details).Â
Identify your purpose and summarize it in one sentence.
Find a specific recipient (avoid "To whom it may concern" if possible).
Open with a formal salutation like "Dear [Full Name]:" and introduce yourself and your purpose in the first paragraph.
Write your body paragraphs, keeping each one focused on a single point.
Close with a clear next step ("Please let me know"), a sign-off ("Sincerely," or "Best,"), and your signature.
Proofread with a grammar checker, then read it yourself once more before sending.
Table of contents:
What is a business letter?
A business letter is formal written communication between organizations, individuals, or external entities for specific professional purposes. It can do things like give requested information, make inquiries, make proposals, accompany invoices, address concerns, or convey intention.Â
These communications usually follow standardized formats and include expected elements like formal salutations, signatures, contact information, and a body of text focusing on one specific business purpose. You won't likely get fired for not rigidly following every rule, but abiding by format expectations can reduce variables, keep your messaging professional, get your message across clearly, and even enable automation.
Business letter example
Here's a business letter example—specifically, a request for information (RFI) asking about Guy Fieri's free Food Network cooking classes. It follows standard block format, which is the most common layout you'll encounter in professional settings. Use it as a visual reference as we break down how to format a business letter.
Business letter template
We created a free business letter template you can make a copy of and customize for your own needs. Be sure to replace the placeholder text with your information, remove any sections that don't apply, and proofread before sending.
A few tips for customizing it:
Font: The template uses a modern sans-serif font, which works well for digital business communication by making it easier to read and more accessible to all recipients.
Format: The template uses standard block format, but you can adjust to modified block or semi-block depending on your preference (more on those below).
Date: Use the date you send the letter, not the date you started drafting it.
Recipient contact information: Include this if you have it. Leave it out if it's not available or relevant.
Enclosures: Only include this line if you're attaching additional documents.
How to write a business letter
You know what goes into a business letter and how to format one. Now it's time to actually write it. Here's how to write a business letter for just about any occasion in five steps.
1. Identify your purpose
Before you write a word, get clear on why you're writing. If your letter doesn't fall into a neat category, try summarizing your purpose in one sentence. That sentence should capture what you need, who you're writing to, and why they're the right person to receive it. Once you have it, use it as the foundation for your opening paragraph.
2. Find your contact
Every letter needs a recipient, and "To whom it may concern" signals that you didn't try very hard to find one. Before you start writing, look for a specific name. Check mastheads, contact pages, staff directories, or About Us pages. AI sales tools like contact crawlers can scrape the internet for relevant contacts in a matter of seconds.
Once you have a name, use an inclusive salutation like "Dear [Full Name]"—it's better than assuming someone's preferred honorifics (like "Dear Mr." or "Dear Ms.").Â
3. Write with intention
You'll spend most of your time in the body, and every paragraph should advance the purpose you identified in step one. Keep it in the second person (address your reader as "you") and maintain a consistent, professional tone throughout.
Not sure how to get your tone right? You can always use a writing generator to help out by:
Writing an effective introduction
Turning your rough ideas into full letter bodies
Giving you new phrasing options
Rephrasing your own words into a different tone
Adding humor or other personal touches
Giving you suggestions for improvement
A letterhead can also go a long way here. Adding your organization's name, logo, address, and contact info to the top of the document makes the whole letter feel more polished before the reader hits your first sentence.
4. Keep it short
No one wants to wade through dense blocks of text to find the point. Try to limit paragraphs to four to six lines and keep the entire letter to one page if possible.
If you're sending your letter digitally, draft it in a text editor like Google Docs first. You'll get better formatting tools and a clear sense of whether your letter fits on a single page. Save the final version as a PDF so the formatting holds regardless of what your recipient uses to open it.
5. Edit and proofread
Every spelling or grammar mistake chips away at your credibility. Run your letter through a grammar checker like Grammarly or ProWritingAid. Even after a tool pass, proofread it yourself at least once. And if you haven't heard back within a week or so of sending, don't assume the worst—send a polite follow-up email instead.Â
How to format a business letter
The specifics of what goes into your business letter vary depending on the purpose. But nearly every business letter contains the same four core sections: a heading, salutation, body, and sign-off. Here's what goes into each, followed by standard layout styles.
1. Heading
Your heading opens the letter and sits left-justified at the top of the page. It generally includes:Â
Your name
Your return address
Your contact information
The date the letter will be sent
The recipient's address (optional)
In some cases—particularly if you're sending a physical letter to a company—it can be helpful to include the recipient's address in the heading as well. In the digital age, it's not as important since you'll likely send this as an email or attachment. When in doubt, it doesn't hurt to include it, as it can also show you've done your homework.Â
Letters don't usually have big title headers labeling them as something generic like "Business inquiry" or "Business letter." But if you're writing one for a well-defined purpose for documentation, like a letter of resignation or offer letter, you could consider it.
2. SalutationÂ
Your salutation (or greeting) goes on its own line between the heading and the body.Â
In a business context, you want to be formal but not stilted. "Hey!" won't be taken seriously, while "Greetings, Sir/Madam" comes across like an alien cosplaying as a human.Â
"Dear [Name]," is always a safe choice. Use the recipient's full name, or replace their first name with a title like "Dr." or "Professor." Always use a specific name if you can find one. If you can't, use a stand-in like "Dear [Company Name] hiring committee." You could do worse than "To whom it may concern," but it's impersonal and best avoided when possible.
One formatting note: in formal business letters, use a colon after the name ("Dear Ms. Chen:") rather than a comma. Not a hard rule, but it's the more professional convention.
3. Body
This is where you make your case, ask your question, or shoot your shot. The body can be as short as a single sentence—something like "We have received your request and will respond within two business days"—but most letters run a few paragraphs.
For longer letters, a three-paragraph structure works well.Â
Paragraph 1: Greet the reader, introduce yourself, and state the purpose of your letter.
Paragraph 2: Follow up with the details of your message. Any background info they need to know or extra context can go here as you make your point.
Paragraph 3: Wrap it up with a quick summary of your main point, let them know what they can do next—for example, "Please let me know…" (for a request), "I look forward to your response" (an expectation), or "Please find enclosed…" (for a reference to an attachment). Â
4. Sign-off
Once you've made your point, close it out. Every business letter should end with four elements:
Sign-off: Like "Dear" in the salutation, "Sincerely" is a safe sign-off to follow the body with. Depending on the context and familiarity, alternatives like "Best" or "Gratefully" can also work, but this isn't somewhere you want to take risks.
Signature: It's less common now to add a signature to non-legally binding documents, but still, it doesn't hurt to include one beneath your sign-off. For physical letters, sign the letter by hand. For digital ones, most word processors like Google Docs and Microsoft Word let you draw a digital signature or upload an image of one.Â
Typed name: Since most people's signatures are borderline unreadable, type up your name below the signature. This leaves no question as to who you are and how to spell your name.
Enclosures: Lastly, if you have any enclosed documents accompanying the letter, don't forget to include them.
5. Choosing a layout style
There are three standard business letter formats. You can arrange the contents above in whichever style suits your purpose.
Block format is the most common. Everything is left-justified with no first-line indentations. You'll also add 1"–1.15" of line spacing between paragraphs.
Modified block is a variation on block formatting. The body of your business letter is left-justified, while non-paragraph elements like the heading, sign-off, and signature are moved to the right margin.Â
Semi-block keeps everything left-justified but indents the first line of each paragraph by 0.5." Because the indents already separate paragraphs visually, remove the extra line spaces between paragraphs or use modest (1.5"–2") spacing.
Types of business letters
Business letters serve a wide range of purposes across sales, hiring, procurement, and day-to-day operations. Here are some of the most common types.
Sales letter: A pitch to potential customers promoting a product or service.
Business inquiry: A formal request for more information about a company's products, services, or job openings.
Request for information (RFI): A structured request to gather detailed information from potential vendors about their offerings.
Cover letter: An introductory letter that accompanies a document like a resume or job application, summarizing who you are and why you're writing.
Offer letter: A letter sent to a successful job applicant to formalize a position and outline its terms.
Letter of recommendation: Written by a senior professional on your behalf to vouch for your qualifications.
Acknowledgment letter: A short, often boilerplate letter confirming that you've received something like a document, payment, or request.Â
Letter of resignation: A formal notification to your employer that you're leaving, providing dated documentation of your timeline and, optionally, your rationale.
Using AI for your business letter
In a world where you can write literally anything with ChatGPT, you may be wondering why I didn't tell you to draft your entire business letter using AI. While you certainly can do that, letters (business or otherwise) usually benefit from a personal, human touch that says, "Hey, I wrote this." But you can still use AI to assist you with writing a business letter. Here's how.
Ask for a first draft: Try asking an AI chatbot or an AI text generator for a business letter draft tailored to your specific needs. You can even feed the AI our template so it follows proper formatting.Â
Rewrite and revise: No matter how good the AI's letter is, you should consider rewriting it in your own personalized voice, especially if you're sending it to someone you have a business relationship with.Â
Polish your letter with AI copy editing: Whether you write your letter from scratch or use AI, you can feed the finished draft to a chatbot or AI grammar checker and ask it to scan for errors. AI isn't perfect, so be sure to do some human-led proofreading, too.
You might read all this and still think it's a better option to go full AI. Sure, you're the master of your own corporate destiny, but I'd recommend against trying to pass off an AI-generated letter as something you wrote.
How to automate your business letter writing with ZapierÂ
Now that you know how to write a business letter, use Zapier to connect thousands of apps so you can build an automated system that manages your entire writing process—from drafting and storing business letter drafts to crawling for contact information and sending emails.
For example, you can automatically store new form submissions in Google Sheets, use that data to create and autopopulate a Google Docs business letter template, and use AI to draft a personalized follow-up email, complete with the business letter attached.
How to write a business letter: FAQ
Here are quick answers to some of the most common questions about writing and formatting business letters.
What is a business letter format?
A business letter format refers to the overall structure and presentation of your letter. The three standard formats are block, modified block, and semi-block.Â
What is the proper format for a business letter?Â
There's no one right business letter format—each business letter should be tailored to the recipient. But if you're stuck, the safe default is to use the block format. It has 1" margins on all sides, standard 12-point font, 1"–1.15" spacing, a space between paragraphs with no first-line indentations, and left justification for all text.
Related reading:
What is business process automation (BPA)?: Definition and tips
Business objectives: How to set them (with examples and a template)
Email etiquette: How to ask people for things and actually get a response
This article was originally published in February 2024 and has also had contributions from Dylan Reber. The most recent update, with contributions from Jessica Lau, was in April 2026.
