How to Call In Sick to Work (Professionally)

Calling in sick is straightforward when you do three things: tell your manager early, keep the message short and honest, and follow whatever process your employer has set out. You don’t need to over-explain or apologize at length. A clear, timely heads-up protects your professional reputation and gives your team time to plan around your absence.

What to do before you call in sick

A few minutes of preparation makes the message easier and avoids missteps.

• Check your employee handbook. Employers set their own rules for reporting an absence: who to contact, how (phone, email, text, or a tool like Slack or Teams), and by when. Some also require a doctor’s note after a set number of days.
• Decide your method. If your policy allows a text or email, that’s often fine. If it requires a call or voicemail, do that. When unsure, call and send a brief written note so there’s a record.
• Note anything urgent. Glance at your calendar for meetings or deadlines someone may need to cover.

How to call in sick, step by step

1. Reach out as early as possible. Before your shift starts is ideal. Early notice lets your team arrange coverage and reads as professional; a last-minute message can strain colleagues.
2. Keep it brief and honest. State that you’re unwell and won’t be able to work today. You can mention the general issue, but you are not required to disclose a diagnosis or medical details.
3. Give an expected return and a handoff. If you can, say when you expect to be back or when you’ll update them, and flag any time-sensitive task or how to reach you for genuine emergencies.
4. Confirm in writing. If you phoned, follow up with a short text or email so the absence is documented.
5. Then rest. Recovery is the point. If your policy requires a note, sort that out once you’ve made contact.

Sample messages for calling in sick

Keep these short. Adapt the tone to your workplace.

Text or instant message:

Hi [Manager], I woke up unwell this morning and won’t be able to work today. I’ll keep an eye on anything urgent by message and expect to be back tomorrow. I’ll update you if that changes. Thanks.

Email:

Subject: Sick day, [Your name]

Hi [Manager],

I’m not well today and won’t be able to come in. [Coworker] can cover the [task/meeting] if needed, and I’m reachable by email for anything urgent. I expect to be back [day] and will let you know if that changes.

Thank you, [Your name]

Phone or voicemail:

“Hi [Manager], this is [Your name]. I’m unwell today and won’t be able to make it in. I expect to be back [day] and will follow up by email. Please call if you need anything urgent. Thanks.”

Notice what these don’t do: they don’t overshare symptoms, dramatize, or over-apologize. Brief and reliable beats detailed every time.

How much detail should you share?

Generally, you can say you’re unwell and unable to work without naming a condition. You may choose to mention a fever or a stomach bug if you’re comfortable, but it isn’t required. If your absence triggers a documentation request, a doctor’s note typically confirms that the absence is medically justified rather than spelling out your diagnosis.

A couple of practical cautions:

• Be consistent. What you tell your manager should match anything you later put in writing or in a note.
• Don’t exaggerate. Inflating symptoms or inventing an illness can backfire and erode trust.

When you’ll need a doctor’s note

Whether you need a note depends almost entirely on your employer’s policy, not on a single national rule. Many employers ask for documentation only after a certain number of consecutive sick days. Three days is a common threshold, but it’s a company rule that varies, not a universal legal requirement. Check your handbook so you aren’t caught out.

A separate context can apply if your absence is tied to a longer or more serious health issue. Under the federal Family and Medical Leave Act (FMLA), an employer may request a medical certification when leave is for a “serious health condition,” and a period of more than three consecutive days of incapacity plus continuing treatment is one way that definition is met. FMLA is its own job-protected leave framework, separate from routine sick-day rules; see how many sick days before you need a note for how those two things differ.

If your workplace does require a note for an ordinary short illness, you can ask your own clinic, an urgent care, or a telehealth provider. For more on how that works and what makes a note valid, see are online doctor’s notes legal?

Common mistakes to avoid

A few habits turn a routine sick day into a problem:

• Waiting too long to tell anyone. Going quiet until mid-morning leaves your team scrambling. Notify early.
• Over-explaining. You don’t need a detailed symptom report or repeated apologies. Brief and clear is more professional.
• Disappearing entirely. Unless you’re too unwell to do so, a quick line about how to reach you for genuine emergencies goes a long way.
• Faking or exaggerating. Inventing an illness, or worse, submitting a fake note, can cost you your job and your credibility. If you’re well enough to work, work.
• Ignoring the policy. Texting when your employer requires a call (or vice versa) can count as not properly reporting the absence. Follow the process.

A quick checklist

• Checked the handbook for the reporting method and any note requirement
• Notified your manager before your shift
• Kept the message short and honest
• Gave an expected return day and a handoff
• Confirmed in writing
• Arranged a note if your policy requires one