What Font to Use in a Formal Letter

Everyone · Explainer · Updated October 1, 2026 · LearnLife Editorial

What font should be used in a formal letter?

A formal letter requires a font that is professional and easy to read. Commonly accepted fonts are Times New Roman, Arial, and Calibri. Times New Roman is a serif font, characterized by small strokes at the ends of letters, which is often preferred for printed letters because it guides the eye along the text. Arial and Calibri are sans-serif fonts, which have a cleaner, simpler appearance and usually work better for digital letters.

For example, when applying for a job, a cover letter written in Times New Roman, 12-point font, looks traditional and trustworthy. If the letter is to be sent by email, Arial or Calibri at 11 points is suitable because these fonts are optimized for screen reading and appear modern. Decorative fonts such as Comic Sans, Brush Script, or Papyrus should be avoided, as they lessen the professional tone and can be hard to read.

What font size is appropriate for a formal letter?

The font size should balance readability and presentation. The standard size for formal letters is 11 or 12 points. Fonts smaller than 11 points risk making the text difficult to read, while sizes larger than 12 points can appear informal or overly large.

For instance, if a letter is printed and mailed, Times New Roman or Arial at 12 points ensures clarity and a neat look. When sending the letter by email, 11-point Calibri or Arial is a common choice because the smaller size fits well on most screens without sacrificing legibility. Consistency in size throughout the letter is essential; switching sizes mid-letter can appear unprofessional.

Why does font choice matter in formal letters?

Font choice influences how the letter is perceived. A clear, professional font shows respect for the reader and indicates that the sender takes the matter seriously. This is vital when communicating with employers, government agencies, schools, or other official entities.

Imagine sending a request letter in a casual font like Comic Sans. Even if the content is strong, the playful appearance can undermine the letter’s seriousness. Conversely, a letter in Times New Roman conveys formality and care. Using a consistent, legible font helps the reader focus on the content rather than being distracted by visual inconsistencies.

What common font mistakes should be avoided in formal letters?

Avoiding certain font mistakes helps maintain professionalism:

• Decorative or script fonts: These include Brush Script, Lucida Handwriting, or Curlz MT. They reduce readability and appear informal.
• Mixing fonts: Using more than one font in a letter creates confusion and looks messy. Choose one font and use it consistently.
• Inconsistent font sizes: Avoid using multiple font sizes within the letter unless emphasizing a heading. Stick to 11 or 12 points.
• Colored fonts: Using anything other than black or a very dark color can appear unprofessional and may be difficult to read, especially when printed.

For example, a complaint letter to a company should avoid playful fonts or colored text. The letter should use a single font such as Arial, in black, at 12 points, ensuring the message is clear and authoritative.

How should a formal letter be formatted beyond font and size?

Font and size are part of the overall presentation. Proper formatting includes:

• Margins: Set 1-inch margins on all sides to provide adequate white space.
• Alignment: Left-align all text; this is the standard for formal letters.
• Line spacing: Use single spacing within paragraphs and double spacing between them to enhance readability.
• Paragraph indentation: Avoid indenting paragraphs; instead, separate paragraphs by double spacing.
• Header: Include your address and date aligned either left or right at the top.
• Salutation and closing: Use formal greetings (e.g., “Dear Ms. Johnson”) and closings (e.g., “Sincerely,” “Respectfully yours”).

For instance, a letter to a school principal requesting information should be left-aligned with 1-inch margins, use single spacing within paragraphs and double spacing between paragraphs, and employ a formal salutation and closing. This layout helps maintain a clean, professional appearance that supports the font choice.

What fonts work best for digital formal letters or emails?

For digital letters or emails, Arial and Calibri are usually the preferred fonts because they display well on screens. Calibri, especially, is the default font in many email programs, providing a modern, clean look without sacrificing professionalism.

For example, a formal email to a potential employer should use Arial or Calibri at 11 points to ensure readability across devices. Saving the email or letter as a PDF before sending preserves the font and formatting, preventing display errors caused by different email clients or devices.

Avoid obscure fonts that may not be installed on all devices, as this can cause the letter to appear differently or substitute fonts automatically. Using widely accepted fonts ensures your letter looks consistent to recipients.

How can the font and formatting of a formal letter be checked before sending?

Reviewing the letter carefully ensures it meets professional standards. Steps include:

1. Print a copy: Reading the letter on paper can reveal spacing, font size, or readability issues that are not obvious on screen.
2. View on multiple devices: Open the letter on a smartphone, tablet, and another computer to confirm consistent appearance.
3. Confirm font settings: Check that only one font is used, and the size is between 11 and 12 points.
4. Inspect margins and spacing: Verify 1-inch margins and correct spacing between paragraphs.
5. Seek feedback: Have a trusted friend, colleague, or mentor review the letter for professionalism and clarity.

For example, when preparing a formal letter for a landlord about a lease issue, printing it and reviewing on a phone ensures that the letter remains easy to read and professional-looking regardless of how it is viewed. This final check helps avoid mistakes that could lessen the letter’s impact.

What steps should be taken after choosing the font and formatting?

Once font and formatting are finalized, focus on the letter’s content. Use clear, polite language and organize ideas logically. Proofread carefully for grammar and spelling errors and avoid slang or informal expressions. The combination of proper font, format, and well-written content creates a professional impression.

For example, when writing a formal request to a government office, start with a clear introduction (“I am writing to request…”), follow with supporting details organized in separate paragraphs, and close politely (“Thank you for your time and consideration”). Resources like Formal Letter Tips for Clear and Polite Writing and How to Write a Formal Letter in English provide useful guidance on wording and tone.

If the letter concerns legal matters or complex issues, consulting a professional for advice may be necessary. For routine correspondence, thorough proofreading and format checks usually suffice to ensure the letter’s effectiveness.

Frequently asked questions

Can fonts like Georgia or Verdana be used in formal letters?

Yes, Georgia (a serif font) and Verdana (a sans-serif font) are acceptable alternatives to Times New Roman or Arial if those are unavailable. They are professional and readable but less commonly used, so checking the recipient’s preferences can be helpful.

Is it okay to use bold or italics in a formal letter?

Use bold or italics sparingly to highlight important information, such as headings, dates, or specific terms. Overuse can clutter the letter and reduce readability, so keep emphasis minimal.

Can colored fonts be used in formal letters?

Generally, formal letters should use black or very dark fonts to ensure readability and professionalism. Colored fonts can appear informal or distracting and should be avoided unless explicitly requested.

What font is best for formal emails?

Arial, Calibri, or Times New Roman at 11 or 12 points are recommended for formal emails because they display well on most devices and maintain a professional tone.

Should font choices differ between printed letters and emails?

Serif fonts like Times New Roman are often preferred for printed letters, while sans-serif fonts like Arial or Calibri work better for emails. This choice supports readability in each format while keeping the letter formal.