How to Say ‘I will be late’ at Work
When you know you will arrive after the expected start time, the direct phrase “I will be late” is clear, but it can sound blunt or incomplete in a professional setting. The best way to say it depends on how late you will be, who you are telling, and whether you are sending a quick message or speaking face-to-face. This guide gives you the exact phrases to use, explains the tone of each option, and helps you avoid common mistakes that can make you sound careless or unprofessional.
Quick Answer: The Best Phrases for Saying You Will Be Late
- For a manager or boss (formal): “I wanted to let you know that I am running behind schedule and will be about 15 minutes late.”
- For a colleague or teammate (neutral): “Just a heads-up, I am running a bit late. I will be there by 9:15.”
- For a close coworker or in a casual workplace (informal): “Sorry, I am running late. See you in a few.”
- For an email or written message: “I am writing to inform you that I will be arriving late due to unexpected traffic.”
Why “I will be late” Can Sound Too Direct
The phrase “I will be late” is grammatically correct, but in many workplace cultures, it sounds like a simple statement of fact without any acknowledgment of the inconvenience. Native speakers often soften the message by adding a reason, an apology, or a specific time. The goal is to show that you are responsible and considerate of other people’s time.
Formal vs. Informal: Choosing the Right Tone
The tone you choose depends on your workplace culture and your relationship with the person you are informing. Use the table below to match the situation with the appropriate phrase.
| Situation | Formal Phrase | Informal Phrase |
|---|---|---|
| Email to your manager | “I apologize for the delay. I will be arriving at approximately 9:30.” | “Hey, running late. Be there by 9:30.” |
| Text to a teammate | “I wanted to give you a quick update. I am running behind and will be 10 minutes late for our meeting.” | “Sorry, stuck in traffic. 10 mins late.” |
| Speaking to a supervisor in person | “I am sorry, but I am running a little late this morning. I should be at my desk by 9:15.” | “My train was delayed. I will be there soon.” |
| Group chat with your team | “Good morning, everyone. I am running late and will join the call as soon as I arrive.” | “Running late. Will dial in from my phone.” |
Natural Examples for Different Scenarios
Here are real-world examples you can adapt to your own situation. Pay attention to the small changes in wording that make each version sound natural.
Example 1: Morning Commute Delay
Formal email to your boss:
“Dear Ms. Chen, I wanted to let you know that I am running behind schedule this morning due to a delay on the subway. I expect to arrive at the office by 9:45. I will start on the report as soon as I get in. Thank you for your understanding.”
Casual text to a coworker:
“Hey Mark, my train is stuck. I will be about 20 minutes late. Can you cover the first part of the stand-up for me?”
Example 2: Late for a Meeting
Message to the meeting organizer:
“I am so sorry, but I am running a few minutes late for the 2 PM meeting. Please start without me, and I will join as soon as I can.”
Quick chat message to the group:
“Apologies, I am running 5 minutes late for the call. Please go ahead.”
Example 3: Unexpected Appointment or Emergency
Professional phone call:
“Hi, this is [Your Name]. I am calling because I have a family emergency and will be late today. I will keep you updated on my arrival time.”
Brief email update:
“Subject: Running Late Today
Hi [Name], I wanted to inform you that I will be arriving late this morning due to an unexpected personal matter. I will be in as soon as I can. Best, [Your Name]”
Common Mistakes to Avoid
Even advanced learners make these errors. Here are the most frequent mistakes and how to fix them.
Mistake 1: Not Giving a Specific Time
Wrong: “I will be late.”
Better: “I will be about 15 minutes late.”
Why: Without a specific time, the other person does not know how long to wait or whether to reschedule.
Mistake 2: Over-Apologizing
Wrong: “I am so, so sorry. I am really, really late. I feel terrible.”
Better: “I apologize for the delay. I will be there shortly.”
Why: Too many apologies can sound insincere or overly emotional. One clear apology is enough.
Mistake 3: No Reason or Vague Reason
Wrong: “I am late because of something.”
Better: “I am running late due to heavy traffic on the highway.”
Why: A brief, honest reason shows that you are not making an excuse. Avoid being too vague.
Mistake 4: Using “I will be late” in an Email Subject Line
Wrong: Subject: “I will be late”
Better: Subject: “Arriving Late This Morning – [Your Name]”
Why: A clear subject line helps the reader understand the message immediately.
Better Alternatives for Common Situations
Instead of repeating “I will be late,” try these phrases. They sound more natural and professional.
- Instead of “I will be late”: “I am running behind schedule.”
- Instead of “I will be late for the meeting”: “I will be joining the meeting a few minutes late.”
- Instead of “Sorry I am late”: “Thank you for waiting. I apologize for the delay.”
- Instead of “I don’t know when I will be there”: “I will update you with my estimated arrival time as soon as I can.”
When to Use Each Phrase
Knowing when to use a phrase is just as important as knowing what to say.
- “I am running late” – Use this in casual conversation or quick messages. It is the most common and natural phrase.
- “I am running behind schedule” – Use this in formal emails or when speaking to a manager. It sounds more professional.
- “I will be delayed” – Use this when the delay is out of your control, such as a canceled train or a traffic accident.
- “I will be there by [time]” – Always include a specific time when possible. This helps the other person plan.
Mini Practice: Test Your Understanding
Read each situation and choose the best phrase. Answers are below.
Question 1: You are 10 minutes late for a team meeting. You send a chat message to the group. What do you write?
A) “Late.”
B) “Apologies, I am running 10 minutes late. Please start without me.”
C) “I will be late because of traffic.”
Question 2: You need to email your boss to say you will be 30 minutes late due to a doctor’s appointment. What is the best subject line?
A) “Late”
B) “Doctor Appointment”
C) “Arriving Late This Morning – [Your Name]”
Question 3: A coworker asks where you are. You are stuck in traffic. What is the most natural reply?
A) “I am running late. Stuck in traffic. ETA 9:20.”
B) “I will be late.”
C) “I am delayed.”
Question 4: You are in a formal meeting and arrive 5 minutes late. What do you say when you enter?
A) “Sorry.”
B) “My apologies for being late. Please continue.”
C) “I am late.”
Answers: 1-B, 2-C, 3-A, 4-B
Frequently Asked Questions
1. Should I always give a reason for being late?
In most professional settings, a brief reason is helpful because it shows you are not being careless. However, if the reason is very personal (e.g., a health issue), you can simply say “due to a personal matter.”
2. Is it okay to say “I will be late” in a text message?
Yes, but it sounds very direct. It is better to add a short apology and a specific time. For example: “Sorry, running late. Will be there by 9:30.”
3. How do I say I will be late without sounding rude?
Use a polite opening like “I wanted to let you know” or “Just a heads-up.” Always include an apology and an estimated time of arrival. Avoid blaming others or making excuses.
4. What if I don’t know exactly when I will arrive?
Be honest. Say something like: “I am not sure of my exact arrival time yet, but I will update you as soon as I have a better estimate.” This shows you are being transparent and responsible.
For more guidance on professional communication, explore our Workplace Speaking Phrases and Professional Email Alternatives. If you have questions about our approach, please visit our FAQ page or read our Editorial Policy.
