Do Hashtags Work on Threads? How Topic Tags Really Work

If you came to Threads from Instagram or X expecting to pile on hashtags, here is the short answer: traditional hashtags do not work on Threads. Instead, Threads has its own system called topic tags, and it works differently. Here is what you need to know.

Topic tags, not hashtags

Threads replaced the open hashtag system with topic tags. The key differences:

• No hash symbol. You do not type "#". You add a tag, and Threads turns it into a clean, clickable link in your post.
• One tag per post. You get a single topic tag, not a long list. So the old habit of stacking ten hashtags is off the table.
• Clickable and searchable. Tapping a tag takes you to other posts on that topic, and tags are searchable. But you cannot follow a tag the way you could follow hashtags elsewhere.

Do they actually help?

Yes, used well. A topic tag groups your post with a wider conversation and makes it easier to surface in search, and posts that include a relevant tag tend to get more views than posts without one. The catch is that you only have one, so it has to count.

How to use the one tag you get

1. Pick the most specific tag that fits. A narrow, relevant topic connects you with the right readers better than a broad one.
2. Match the tag to the post. A tag that does not fit the content just looks like noise.
3. Do not rely on it alone. Tags help discovery, but reach on Threads is driven more by replies and early engagement. See how the Threads algorithm works for what moves the needle most.

So: skip the hashtag habit, add one well-chosen topic tag, and put your energy into the post itself. For the bigger picture, our guide on how to grow on Threads covers the tactics that matter most.