10 Business Letter Templates for Professional Communication

How to Write a Business Letter: Professional Format & Examples

Writing a professional business letter is a fundamental skill for clear, formal communication. Use this guide to structure your letter, choose the right tone, and adapt examples to common situations.

1. When to use a business letter

• Formal requests (contracts, proposals)
• Official notices (resignations, terminations)
• Introductions or referrals
• Customer or vendor communication
• Legal or financial correspondence

2. Standard business letter format

• Paper and font: Use plain white paper (if printed) and a readable font like 11–12 pt Arial, Calibri, or Times New Roman.
• Margins: 1-inch margins all around.
• Alignment: Left-aligned (block format) is standard.
• Spacing: Single-space within paragraphs, double-space between paragraphs.
• Length: Keep to one page when possible.

3. Required components (in order)

1. Sender’s address — Your company or personal address; omit if using a letterhead.
2. Date — Spell out month (e.g., February 5, 2026).
3. Recipient’s name and address — Full name, title, company, street address, city/state ZIP.
4. Salutation — Use a formal greeting: “Dear Mr. Smith:” or “Dear Dr. Lee:” Use full name if gender unknown: “Dear Alex Johnson:” Avoid “To Whom It May Concern” unless necessary.
5. Subject line (optional) — Bold or underlined short phrase summarizing purpose (e.g., Subject: Proposal for Q3 Marketing).
6. Opening paragraph — State your purpose clearly and concisely.
7. Body paragraphs — Provide context, necessary details, and any supporting points. Use 1–3 paragraphs.
8. Closing paragraph — Summarize action requested or next steps, express appreciation.
9. Complimentary close — “Sincerely,” “Kind regards,” or “Respectfully,” followed by a comma.
10. Signature block — Hand-signed name (if printed), typed name, job title, company name, and contact info.
11. Enclosures/Attachments — Note any included documents: “Enclosure: Resume” or “Attachment: Contract.”

4. Tone and language tips

• Be concise: State purpose early; eliminate fluff.
• Be formal but friendly: Professional tone without stiffness.
• Be specific: Give dates, amounts, names, and deadlines when relevant.
• Use active voice: “We will send the invoice” instead of “The invoice will be sent.”
• Proofread: Check grammar, punctuation, and proper names.

5. Common variations

• Block format: All elements left-aligned; no indentation (most common).
• Modified block: Sender’s address, date, and closing start at center-right; body left-aligned.
• Semi-block: Same as modified block but first line of each paragraph indented.

6. Examples

Example 1 — Business proposal request February 5, 2026
Ms. Laura Chen
Procurement Manager
BrightTech Solutions
123 Industry Way
Austin, TX 78701

Dear Ms. Chen:

I am writing to propose a partnership between BrightTech Solutions and NovaLogix to provide managed IT services for your regional offices. We specialize in reducing downtime and improving system security for mid-sized enterprises.

Over the past three years we reduced average incident resolution time by 45% for clients similar to BrightTech. Attached is a summary of our services, pricing tiers, and a proposed implementation timeline. I would welcome the opportunity to discuss this proposal and tailor a plan to your needs.

Please contact me at (555) 123-4567 or [email protected] to schedule a meeting. Thank you for your consideration.

Sincerely,
Erin Novak
Director of Business Development
NovaLogix LLC
(555) 123-4567
[email protected]
Attachment: Service Proposal

Example 2 — Resignation letter February 5, 2026
Mr. Daniel Rivera
Operations Manager
Harborview Logistics
78 Dockside Blvd.
Seattle, WA 98101

Dear Mr. Rivera:

Please accept this letter as formal notice of my resignation from my position as Senior Operations Analyst at Harborview Logistics, effective March 6, 2026 (four weeks’ notice). I appreciate the opportunities I’ve had to grow professionally and contribute to the operations team.

I will assist with the transition and training of my replacement to ensure a smooth handover of responsibilities. Thank you for your support and understanding.

Respectfully,
Maya Patel
Senior Operations Analyst
[email protected]
(555) 987-6543

Example 3 — Customer complaint response February 5, 2026
Mr. Jordan Miles
Customer Service Manager
GreenField Retail
45 Market Lane
Portland, OR 97205

Dear Mr. Miles:

Thank you for contacting us about the damaged shipment you received on January 28, 2026. We apologize for the inconvenience and have processed a replacement order, which will ship within 48 hours. A prepaid return label is enclosed for the damaged items.

We value your business and have credited your account with a 10% discount on your next order. Please contact me directly at [email protected] if you have further concerns.

Sincerely,
Lena Ortiz
Customer Care Lead
GreenField Retail

7. Quick checklist before sending

• Correct recipient name and title
• Accurate dates and figures
• Clear call to action or next step
• Proper attachments noted and included
• Spelling and grammar checked
• Appropriate tone for the situation

8. Closing note

Use this structure and the examples above as templates—adjust wording, length, and formality to match your situation while preserving clarity and professionalism.