Formal vs. Casual: Matching Your Excuse Message to the Situation

The exact same excuse can land two very different ways depending on how it's phrased. "Ugh, not feeling it today, gonna stay home" might be totally normal in a team group chat and slightly jarring in an email to HR. Getting the tone right matters as much as getting the reason right.

How to read the room

Tone isn't really about the excuse itself — it's about who's receiving it and what channel you're using. A few things worth checking before you hit send:

• Who's the recipient? A direct manager you talk to daily is different from HR, a client, or a large group chat.
• What's the channel? Email tends to read more formal by default than a text or Slack message, even with identical wording.
• What's the workplace culture? Some teams are casual across the board; others expect a more buttoned-up tone even in quick messages.
• Is this a one-off or a pattern? If you've been out a few times recently, leaning slightly more formal can help the message land as considerate rather than casual about it.

Formal vs. casual, side by side

Here's the same three situations written both ways, so you can see how the wording shifts without changing what's actually being said.

• Calling in sick — formal: "Good morning, I wanted to let you know I'm unwell today and won't be able to come in. I'll keep you updated."
• Calling in sick — casual: "Hey, not feeling great today, gonna take a sick day. I'll be around if anything urgent comes up."
• Running late — formal: "Apologies for the delay — I'm on my way and should arrive shortly."
• Running late — casual: "Running a few minutes behind, see you shortly!"
• Cancelling a meeting — formal: "I need to cancel our meeting today. I'll follow up to find a new time that works."
• Cancelling a meeting — casual: "Gonna have to bail on our meeting today — can we find another time this week?"

A simple rule of thumb

When in doubt, match the tone the other person usually uses with you. If your manager writes short, warm, exclamation-point messages, a stiff formal note can actually feel more distant than necessary. If your workplace runs on formal email chains, a casual one-liner can come across as underprepared, even if that's not the intent. Matching tone isn't about being fake — it's about making the message easy to receive.