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HomeBlogSkill Building & Careers
Skill Building & Careers

Email Subject Lines That Get Opened: Formulas and Examples

Write email subject lines that are clear and get opened: be specific, put key words first, state any action or deadline and avoid spammy phrases.

The Teyro TeamOct 26, 20261 min read
On this page6 sections
  1. Direct answer
  2. Formulas
  3. Before and after
  4. Where Teyro fits
  5. The bottom line
  6. More guides

The subject is the first, and sometimes only, thing read.

Direct answer

A good subject line is specific, short and action-oriented. Put key information first and say if action is needed and by when. Avoid vague words like "Hi" or "Question" and avoid spammy phrases.

Formulas

  • Action + deadline: "Approve budget by Friday"
  • Topic + detail: "Project Atlas: launch date moved to 14 May"
  • Question: "Can you attend the 3pm review?"
  • FYI: "FYI: new expense policy"

Before and after

BeforeAfter
UpdateSales update: Q2 results attached
MeetingMoving Monday's meeting to 3pm
RequestNeed your sign-off on invoice 1042 by Thu

Where Teyro fits

Teyro's Clear Writing at Work course turns this into short lessons you can play in a few minutes a day. It has 50 lessons, and you can start free.

The bottom line

Tell the reader why they should open it.

More guides

  • How to Create a Writing Style Guide for Your Team
  • Proofreading Checklist
  • Tone of Voice in Workplace Writing
  • Email etiquette at work
  • Clear Writing at Work course

Frequently asked questions

What makes a good subject line?

It is specific, short and tells the reader what the email is about and whether action is needed.

How long should it be?

Keep it short enough to read on a phone, often under about 50 characters.

Should I use "urgent"?

Only when it is. Overuse reduces trust.

Learn it by playing

Clear Writing at Work turns this into short, playable lessons. Free to start.

See the Clear Writing at Work course

Free to start · No credit card needed

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Written by

The Teyro Team

Learning Team at Teyro

We build Teyro — an AI-powered learning platform that turns skill-building into a daily habit through bite-sized, gamified lessons. We write about the learning science and study strategies that shape our product.

More from The Teyro Team

On this page

  • Direct answer
  • Formulas
  • Before and after
  • Where Teyro fits
  • The bottom line
  • More guides

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