Mailchimp tags vs groups vs segments: use one audience and stop paying for duplicates

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Tags, groups, and segments are the main audience management tools in Mailchimp (Getting Started with Tags). Mailchimp says it's best to have one audience that you organize with tags, groups, or segments, because billing is based on the total number of contacts across all your audiences, except archived and cleaned contacts (Requirements and Best Practices for Audiences). If the same email is in two audiences, Mailchimp sees two people, which can add to your monthly bill (About Duplicate Contacts). So organizing one audience with these tools, instead of creating another audience, can keep you from paying for the same person twice.

The three tools side by side

Sources: Getting Started with Tags; Getting Started with Groups; Getting Started with Segments.

Tags

• Tags are labels you create to organize contacts based on information you have about them (source).
• They're built for your own, internal organization. If you want contacts to choose an interest for themselves, Mailchimp says to use groups first and then apply tags as needed (source).
• You can tag from the contact table, a contact's profile, or the Tags page (which handles bulk tagging), and you can tag a whole import or everyone who signs up through a landing page (source).
• Once tagged, you can send emails directly to a tag, use tag data to build segments, or trigger an automation when a tag is added (source).

Groups

• Groups sort subscribed contacts by their interests and preferences and work like categories. Each group has a category (for example "Occupational role") and group names (for example Staff, Faculty, Student) (source).
• They're contact-facing: contacts can pick groups on your signup form, update profile form, or preferences center, or you can add them manually or with an import (source).
• Only subscribed contacts can be added to groups, but unsubscribed contacts keep their group designations (source).
• Each audience can have up to 60 group names in total, and you can hide a group so the data stays visible to you but not to contacts (source).

Segments

• A segment filters contacts who share data, such as when they joined or where they live, using conditions you set. You can then send them targeted emails, text messages, or ads (source).
• On Free and Essentials plans, each segment can have up to 10 conditions with one and/or operator. Standard, Premium, and Legacy plans with Mailchimp Pro get the advanced segment builder, with unlimited conditions and nested logic (source).
• When you send an email or text to a segment, Mailchimp removes anyone who isn't subscribed to that channel (source).
• You can make as many segments as you want, and a contact can be in several segments if they meet the conditions (source).

Which one replaces a second audience?

• An internal label such as "Volunteer", "Trade show contact" or the name of an old audience: use a tag. Mailchimp's own combine-audiences process has you create a tag for each original audience (Combine Audiences to a Primary Audience Using Tags).
• Topics people opt into, like newsletters by interest: use a group on your signup or preferences form (source).
• A one-off or recurring target, like contacts who signed up in the last 30 days but haven't bought yet: use a segment, which can also use tag and group data (source; source; source).

Already split across audiences?

Mailchimp says combining audiences into one primary audience that uses tags reduces the need for duplicate contacts and can potentially reduce your monthly bill if you have duplicates across audiences (source). Its order of steps: export every audience, archive the contacts in the old audiences, create tags in the primary audience, import each audience with its tag, then delete the old audiences (source). Know the trade-offs first:

• The process is permanent, and it doesn't carry over opens and clicks, member rating, opt-in time stamps, signup source, or GDPR permissions. Mailchimp doesn't recommend combining GDPR-enabled audiences (source).
• An audience must be kept for 7 days after an email or automation email is sent to it, and signup forms are tied to audiences, so point them at the primary audience (source).
• Archiving won't lower a peak contact total already recorded for the current billing period, but it lowers costs in future periods (source).

Step-by-step with the files from your export: merge Mailchimp audiences without paying twice.

To see how many contacts you're paying for twice before you merge, export each audience and run AudienceTrim's free audit in your browser. It counts cross-audience duplicates, unsubscribed and non-subscribed contacts (nothing is uploaded).

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FAQ

Related guides

• Duplicates across audiences
• Merge audiences without paying twice
• How to downgrade or pause a Mailchimp plan

AudienceTrim isn't affiliated with Mailchimp or Intuit. Facts are from Mailchimp's help center, accessed October 2026. Privacy · Terms