Carbon copy is a way to send the same email to multiple people at once, with everyone able to see who else received it

When you put someone's address in the CC field (which stands for carbon copy), that person gets a full copy of your email. Unlike the To field, where you put the main recipient, people in CC are included for information or transparency — they're not the primary audience. Everyone who receives the email can see the full list of people in both the To and CC fields.

The term comes from old office practice: when you typed a letter on a typewriter with carbon paper underneath, you made a duplicate copy at the same time. Email CC works the same way — it's a copy sent alongside the original.

Key Takeaways

  • CC sends a copy of your email to additional people, and all recipients can see who was CC'd.
  • Use CC when someone needs to know about the conversation but isn't the main person you're writing to.
  • BCC (blind carbon copy) sends a copy to someone without other recipients knowing they received it.
  • CC is useful for keeping managers informed, including team members on decisions, or creating a record that multiple people saw the same message.

When to use CC instead of To

Put someone in CC when they need context or visibility but you're not asking them to take action. For example, if you email a client with a project update, you might CC your manager so they know the status without being the person you're directly addressing. The client is in the To field; your manager is in CC.

CC is also useful when you want a group to see that you've communicated something to someone else. If you're confirming a important date with a vendor and CC your team, everyone knows the important date is set and who confirmed it. This creates a shared record without making the email feel like it's addressed to ten people at once.

The difference between CC and BCC

BCC stands for blind carbon copy. When you put someone in BCC, they receive the email, but nobody else can see that they received it — not even the person in the To field. The BCC field itself doesn't show up in the email that recipients see.

Use BCC when you need to send the same message to many people but don't want them to see each other's email addresses. For example, if you're sending a newsletter to 200 subscribers, you'd put all addresses in BCC so no one subscriber can see the full mailing list. You'd put your own address (or a generic sender address) in the To field instead.

BCC is also useful when you want to keep someone informed without making it obvious to the main recipient. If you're emailing a client and want your supervisor to see the conversation without the client knowing, use BCC for your supervisor. However, use this carefully — if discovered, it can damage trust.

Why CC matters in workplace email

CC creates a paper trail. When multiple people receive the same email, there's no confusion about who knew what and when. If a important date gets missed or a decision gets questioned later, the CC list shows who had the information.

CC also prevents the "I didn't know about that" problem. If you're assigning a task to one person but CC their manager, the manager can't claim they weren't informed. This is especially useful in larger organizations where decisions need visibility across teams.

The downside is email overload. If you CC too many people on routine messages, inboxes get cluttered and important emails get buried. Use CC intentionally — include people who genuinely need to see the message, not everyone who might theoretically care.

How to CC someone in common email programs

In Gmail, Outlook, Apple Mail, and most other email services, the CC field appears right below the To field when you compose a message. Click on it, type or paste the email address, and that person will receive a copy. You can CC multiple people by separating addresses with commas.

Some email programs hide the CC field by default to keep the compose window straightforward. If you don't see it, look for a link that says "CC" or "Add CC" near the To field. Clicking it will reveal the field.

The BCC field is usually hidden until you click a "BCC" link or button. This is intentional — it's straightforward to accidentally BCC someone when you meant to CC them, so most programs make you opt in to seeing the field.

Common mistakes with CC

The biggest mistake is CCing the wrong person by accident. If you're replying to an email that already has people CC'd, those people stay CC'd unless you remove them. Always check the CC field before you hit send, especially if you're replying to a long chain.

Another common error is using CC when you should use To. If you're asking someone to do something, they should be in the To field, not CC. CC is for people who need to know, not people who need to act.

Over-CCing is also a problem. If you CC your entire team on every email, people stop reading them. Reserve CC for messages that actually need multiple eyes.

Frequently Asked Questions

Can I CC someone without the main recipient knowing?

No — everyone who receives the email can see the full CC list. If you want to include someone without others knowing, use BCC instead. Keep in mind that using BCC can damage trust if discovered, so use it only when there's a legitimate reason.

What happens if I CC someone on a reply?

If the original email had people CC'd, they stay CC'd on the reply unless you remove them. Check the CC field every time you reply to make sure you're not accidentally keeping people on a chain they shouldn't be on.

Is there a limit to how many people I can CC?

Most email services don't have a hard limit, but practical limits exist. If you're sending to more than 20 or 30 people, consider whether CC is the right tool — a mailing list or group email might work better.

Does CC count as officially notifying someone?

That depends on your workplace or organization. In some settings, being CC'd on an email is considered official notice. In others, it's not. If something is critical, don't rely on CC alone — address the person directly in the To field or follow up with a separate conversation.