How to Say ‘I will be late’ at Work

When you know you will arrive after the expected time, simply saying “I will be late” can sound blunt or incomplete in a professional setting. The best way to handle this is to state the delay, give a brief reason, and offer a new arrival time or next step. This article gives you direct, professional phrases for telling your manager, team, or client that you are running behind schedule, whether in a quick message, a phone call, or a formal email.

Quick Answer: What to Say Instead of ‘I will be late’

Use one of these phrases depending on the situation:

• To a manager (spoken): “I’m running about 15 minutes behind. I’ll update you when I’m on my way.”
• To a team (chat): “Apologies, I’m delayed. I’ll be there by 9:45.”
• To a client (email): “I regret to inform you that I will be arriving later than planned. I expect to be there by 10:30.”
• To a colleague (casual): “Sorry, stuck in traffic. Be there in 20.”

Understanding the Tone: Formal vs. Casual

The way you say you are late depends on your audience and the communication channel. A quick chat message to a coworker is different from an email to a senior manager or a client. Below is a comparison of common phrases and their appropriate contexts.

Comparison Table: Phrases for Being Late at Work

Natural Examples for Different Situations

1. In a Team Chat or Instant Message

Keep it short and clear. State the delay and the new time.

• “Heads up: I’m running about 10 minutes late. See you soon.”
• “Apologies, I’m delayed due to traffic. ETA 9:30.”
• “Just a quick note – I’ll be 15 minutes behind. I’ll join the call as soon as I’m in.”

2. In a Phone Call to Your Manager

Be direct and respectful. Offer a solution if possible.

• “Hi [Name], I wanted to let you know I’m running behind. I should be there by 10:00. I’ll send you the report as soon as I arrive.”
• “I apologize for the inconvenience. I’m stuck in unexpected traffic. I estimate I’ll be 20 minutes late.”
• “Good morning. I’m going to be a bit late this morning. I’ll catch up on the meeting notes.”

3. In a Formal Email to a Client or Senior Leader

Use polite, professional language. Acknowledge the inconvenience and provide a clear update.

• “Dear [Name], I regret to inform you that I will be arriving later than planned due to a scheduling conflict. I expect to be at the office by 11:00. Please let me know if you need to reschedule.”
• “Subject: Update on our meeting this morning. I apologize for the short notice. I am running behind schedule and will be approximately 15 minutes late. I look forward to meeting with you at that time.”
• “I am writing to let you know that I will be delayed for our 2:00 PM call. I will join as soon as I am available. Thank you for your understanding.”

Common Mistakes When Saying You Are Late

Even advanced learners make these errors. Avoid them to sound more professional.

Mistake 1: No apology or acknowledgment

Wrong: “I will be late.”
Right: “Apologies, I will be late. I’ll be there by 9:30.”
Why: A simple statement without an apology can seem rude or dismissive, especially in formal settings.

Mistake 2: Vague time frame

Wrong: “I’m running late. I’ll be there soon.”
Right: “I’m running about 10 minutes late. I’ll be there by 10:10.”
Why: “Soon” is unclear. Give a specific time or duration so others can plan.

Mistake 3: Over-explaining or making excuses

Wrong: “I’m late because my alarm didn’t go off, then I couldn’t find my keys, and the train was delayed.”
Right: “I apologize for the delay. I encountered an unexpected issue this morning.”
Why: Too many details can sound unprofessional. A brief, honest reason is enough.

Mistake 4: Using “I will be late” in a formal email

Wrong: “I will be late for our meeting.”
Right: “I regret to inform you that I will be arriving later than expected for our meeting.”
Why: The first phrase is too direct and casual for formal correspondence.

Better Alternatives for Specific Contexts

When you are late to a meeting

• “I apologize for missing the start of the meeting. I will join shortly.”
• “I’m running a few minutes behind. Please start without me.”
• “I will be late for the 3:00 PM meeting. I will review the recording afterward.”

When you are late to work in the morning

• “Good morning. I’m running late this morning. I will be in by 9:15.”
• “I apologize for my late arrival. I will make up the time this afternoon.”
• “I am delayed due to a personal matter. I will be at my desk by 10:00.”

When you are late for a deadline

• “I regret to inform you that I will not meet the 5:00 PM deadline. I will have the report ready by 9:00 AM tomorrow.”
• “I am behind schedule on this task. I will provide a revised timeline by the end of the day.”
• “I apologize for the delay. I am working on it now and will send it as soon as possible.”

Mini Practice: Choose the Best Phrase

Test your understanding. Choose the most appropriate phrase for each situation.

1. You are sending a quick message to your colleague about being 5 minutes late for a team lunch.
A) “I regret to inform you that I will be delayed.”
B) “Sorry, running 5 minutes late. See you there.”
C) “I will be late.”

2. You are emailing a client to say you will be 20 minutes late for a scheduled call.
A) “I’m late. Call you later.”
B) “I apologize for the delay. I will be available for our call at 2:20 PM.”
C) “I will be late for the call.”

3. You are in a stand-up meeting and you are running behind on a task.
A) “I’m behind schedule on the report. I will have it by tomorrow morning.”
B) “I’m late with my work.”
C) “Sorry, I forgot.”

4. You are calling your manager to say you will be 30 minutes late due to a train delay.
A) “I’m stuck on the train. I’ll be 30 minutes late.”
B) “I will be late.”
C) “Hi, I wanted to let you know I’m delayed due to a train issue. I should be in by 9:30.”

Answers and Explanations

1. B – This is a casual situation with a colleague. A short, friendly message is best. Option A is too formal for a team lunch.

2. B – This is a formal situation with a client. You need to apologize and give a clear new time. Options A and C are too direct and lack professionalism.

3. A – This is a professional update. You state the issue and provide a solution. Options B and C are too vague or unprofessional.

4. C – This is a phone call to your manager. You should explain the reason briefly and give a new time. Option A is acceptable but less polite. Option B is too blunt.

Frequently Asked Questions (FAQ)

1. Is it okay to say “I’m running late” in a formal email?

It is better to use a more formal phrase in an email to a client or senior manager. “I apologize for the delay” or “I will be arriving later than expected” are more appropriate. “I’m running late” is fine for internal chat or casual communication.

2. Should I always give a reason for being late?

In most professional settings, a brief reason is helpful but not always required. For a quick message to a colleague, you can skip the reason. For a formal email or a call to your manager, a short explanation (e.g., “due to traffic” or “due to a scheduling conflict”) shows respect and transparency.

3. What if I am late for a virtual meeting?

Send a quick message in the chat or email the organizer. Use phrases like “Apologies, I am running a few minutes behind. I will join shortly.” or “I am delayed. Please start without me.”

4. How do I apologize for being late without sounding weak?

Keep the apology brief and professional. Focus on the solution, not the problem. For example: “I apologize for the delay. I will be there in 10 minutes and will catch up on the agenda.” This shows responsibility and proactivity.

Final Tips for Workplace Communication

Being late happens to everyone. The key is to communicate clearly and respectfully. Always state the delay, give a specific new time if possible, and apologize briefly. Avoid over-explaining or making excuses. For more help with professional language, explore our guides on Polite Everyday Phrases and Professional Email Alternatives. If you have questions about our content, visit our FAQ page or contact us.