How to Add Labels in Gmail (and Actually Use Them for Client Work)

By Replyf Team · June 10, 2026 · 6 min read

Article Contents

Gmail labels are one of those features almost everyone knows exists and almost no one uses well. Set up right, they turn a chaotic multi-client inbox into something you can navigate in seconds. Set up wrong, they're colored tags nobody clicks.

How to Add a Label (30 Seconds)

Two ways, both fast.

**From an open email:** click the label icon in the top toolbar (looks like a price tag), type the label name, click “Create new”.

**From settings (better if you're creating 8-10 in a row for a new client):** gear icon (top right) → See all settings → Labels tab → scroll to Labels section → “Create new label”.

The label icon method wins for one-offs. The settings method wins when you're setting up a whole client's structure at once.

Nested Labels (The Feature Most People Miss)

Gmail lets you nest labels inside other labels. This is what makes labels useful at scale.

Instead of a flat sidebar cluttered with `ClientA-Urgent`, `ClientA-Waiting`, `ClientA-Archive`, `ClientB-Urgent`, `ClientB-Waiting`, `ClientB-Archive` (and so on), nest them:

  • ClientA (parent)
  • — Urgent
  • — Waiting
  • — Archive
  • ClientB (parent)
  • — Urgent
  • — Waiting
  • — Archive

The Label System Multi-Client VAs Settle On

After some experimentation, most VAs supporting three or more clients end up with the same shape:

**Layer 1: One label per client.** Alicia (blue). Marcus (green). StoneRidge Studios (purple). Distinctive colors so a glance at the sidebar tells you the client mix at a moment.

**Layer 2: Action state, nested under each client.** ToReply (needs a response from you), WaitingOnClient (you need input first), WaitingOnRecipient (reply sent, awaiting theirs), Done (thread closed, archived for reference).

For three clients, that's 15 labels total (3 parents + 12 states). Sounds like a lot. In practice the muscle memory locks in inside a week. See our Gmail inbox organization guide for VAs for the round-robin triage that layers on top.

Filters + Labels = Auto-Categorization

Labeling every email by hand doesn't scale. Filters do the labeling for you.

Steps: click the sliders icon in the Gmail search bar, enter the criteria (from client domain, subject contains X), click Create filter, tick “Apply the label” and pick which label.

The single filter that changes the most: every email from a client's email domain gets their parent label automatically. New client emails pre-sort themselves before you even open Gmail. From there, subject-line filters can catch “URGENT” or “ASAP” keywords and route them to ToReply.

Common Label Mistakes

Watching VAs set up label systems shows a few consistent traps:

  • Too many labels early on. Start with 4-5 per client. Add more only when a real gap shows up in day-to-day work.
  • Colors chosen randomly. Assign colors by client, not by mood. Alicia stays blue forever. Consistency beats which color.
  • Duplicating Gmail categories. Don't make a Social or Promotions label. Gmail's built-in categories cover that.
  • Nesting three or more levels deep. Two levels (client → state) is the maximum that stays practical. Deeper and the sidebar clarity disappears, which was the whole point.

How to Automate Labels With Gmail Filters

Manually clicking to label every email doesn't scale. Filters do the labeling for you automatically as email arrives. The core setup that saves VAs the most time:

  • One filter per client domain. In the Gmail search bar, click the sliders icon → From: `*@clientdomain.com` → Create filter → Apply the label: `ClientA`. Now every email from that client's domain auto-sorts before you see it.
  • Filters for urgency signals. From: `*@clientdomain.com` AND (Subject: URGENT OR Subject: ASAP) → Apply label `ClientA/ToReply` and star. Urgent client email jumps out visually.
  • Filters for calendar-related email. From: `noreply@calendar.google.com` OR From: `calendar-notification@` → Apply label `Calendar` and Skip Inbox. Meeting confirmations sort themselves out of the main view.
  • Filters for newsletters you keep for reference. From: `substack@` OR From: `*@newsletter.com` → Apply label `Newsletters` and Skip Inbox. Available for later reading without cluttering the daily view.
  • Filters for auto-archiving low-priority notifications. Common example: From: `*@notion.so` OR From: `*@slack.com` → Skip Inbox, Apply label `App notifications`. Everything is searchable, nothing is disruptive.

Managing Labels Over Time: When to Add, Merge, Delete

Labels evolve with your workflow. A system that worked six months ago may be cluttered now. Quarterly maintenance keeps it useful:

  • Add a new label when: you keep manually applying a common tag to 10+ emails per week. That's a signal the pattern should be formalized. Set up the label plus a filter that auto-applies it.
  • Merge two labels when: they overlap in practice. If “ClientA/Urgent” and “ClientA/ToReply” end up with the same emails, merge them into just “ClientA/ToReply” and save the mental overhead.
  • Delete a label when: you haven't used it in 60 days. Old labels clutter the sidebar and slow you down when scanning. Gmail lets you delete labels without deleting the underlying emails (they just lose that tag).
  • Rename a label when: the name doesn't match how you think about it anymore. If “Marketing” feels stale but “Newsletters” is more accurate, rename. All existing emails carry the new name automatically.
  • Reassign colors when: you add a new client and existing colors are causing confusion. Consistent color-per-client for as long as the relationship lasts is the rule; changing colors mid-relationship creates its own confusion.

Labels for Delegated Client Inboxes vs. Your Own

If you're a VA using delegate access to a client's inbox, the label setup is slightly different from labeling your own emails:

  • You're managing the client's labels, not your own labels for them. When you create a label inside their inbox, it appears in their Gmail too. Coordinate with the client on the naming so it makes sense to both of you.
  • Nested labels work slightly differently across accounts. If your client already has labels, review their existing structure before adding to it. Duplicating what they already have creates chaos.
  • Filters set up in the client's inbox affect the client too. Test filters on a few sample emails first before setting up a wide filter that could hide something important from your client.
  • Your own Gmail (from your delegate perspective) can have separate labels for tracking your work. For example, in your own Gmail create a “ClientA-Todos” label for your internal notes about what you need to do for that client, separate from the labels inside their inbox.

Want every reply to sound like your client, not a robot?

Try Replyf Free

Related reading

How to Organize a Gmail Inbox as a VA: The Tested System for Multiple Clients

Most Gmail organization advice was written for one person managing one inbox. If you're a VA supporting three clients at once, it doesn't work. Here's the system that does.

Managing Multiple Client Inboxes Without Losing Your Mind

Juggling tone, context, and urgency across multiple inboxes is the real job. Here's how to make it sustainable.

Start Writing Emails Faster with Replyf →

FAQs about How to Add Labels in Gmail (and Actually Use Them for Client Work)

Everything you need to know

How do I add a label to an email in Gmail?

Open the email, click the label icon in the top toolbar (price tag shape), type the label name, click Create new. Or apply an existing label by ticking it in the same menu.

What's the difference between a Gmail label and a folder?

Folders in traditional email put a message in one place. Gmail labels are tags that let one email carry multiple labels at once, and the email still lives in All Mail. That's why one client-facing email can be labeled ClientA + ToReply + Urgent all at the same time and show up correctly in each view.

How do I nest labels in Gmail?

Create the parent label first. Then when creating a child label, check the box that says 'Nest label under' and pick the parent from the dropdown. The child label appears indented in the sidebar under the parent. Two levels of nesting (parent → child) is the practical maximum for VA work; deeper nesting hurts clarity.

Can I auto-apply Gmail labels using filters?

Yes. Click the sliders icon in the Gmail search bar, enter the criteria (from a client's domain, subject contains X, etc.), click Create filter, check 'Apply the label' and pick the label. Every future email matching those criteria gets labeled automatically as it arrives.

How do I delete a Gmail label without deleting the emails?

Settings → Labels tab → find the label in the list → click 'Remove'. The label disappears from the sidebar and from all emails that had it, but the emails themselves stay in your Gmail (in All Mail, still searchable). Removing a label is safe; removing an email is not.

How many labels can I have in Gmail?

Google's documented limit is 500 labels per account, but most VAs settle in the 15-40 range. If you're approaching 100 you probably have overlap that should be consolidated.

Can I apply multiple labels to one email in Gmail?

Yes. A single email can carry any number of labels. That's the main reason labels beat folders for VA work where a message often belongs to a client AND a state AND a project simultaneously.

How do I share Gmail labels with someone I've delegated inbox access to?

You can't share labels directly. When a delegate opens your Gmail, they see your labels automatically because they're accessing your inbox, not their own. The label structure you build lives on your account and delegates use it as-is.

Do Gmail labels sync between devices?

Yes. Labels apply to the message, not to the client (Gmail web, Gmail mobile, third-party clients using IMAP). Any device that logs into your Gmail sees the same labels.