Hashtags: How Many, Which Ones, and on Which Platform?

Instagram caps you at 5, X recommends 2, YouTube ignores everything past 60 and Threads takes one topic. What each platform actually says about hashtags, and how to pick them.

By Hadrien Bonato-Pape · Published on October 7, 2026 · Social platforms

The right number of hashtags depends on the platform, and it's usually smaller than you think. As of late September 2026: 5 max on Instagram, 2 recommended on X, a single topic on Threads, few or none on Facebook, two or three on YouTube. TikTok, LinkedIn and Pinterest don't give a number. The rule that holds everywhere: specific hashtags that actually describe the content.

This article pulls together what the platforms say in their own help pages, not a number copied from blog to blog. Each network has its own formats and limits, which we cover in our platform guides, starting with the Instagram guide to formats and best practices. Here we stick to hashtags: what they still do, how many to use, and how to choose good ones.

What does a hashtag still do in 2026?

A hashtag does two things. It turns a word into a link to other content with the same tag. And it helps the platform understand what your post is about, which shapes who sees it. The second job is the one that matters today.

TikTok says so plainly in How TikTok recommends videos #ForYou: recommendation signals include video information, which might include captions, sounds and hashtags. Instagram's creator FAQ makes the same point: trending hashtags that match the topic of a Reel can help you reach people interested in that topic, while irrelevant ones risk showing your content to people who won't engage.

In other words, a hashtag is no longer a way to get seen by "everyone." It's a filing label. A wrong label doesn't just earn you nothing: it can route your post to people who don't care about it, and their lack of reaction then drags on its distribution.

How many hashtags should you use on each platform?

Here's what each platform documents as of late September 2026. When a network doesn't give a number, we say so instead of making one up.

Instagram: 5 max

This is the biggest recent change. On December 18, 2025, Instagram's official @creators account announced that Instagram now allows only 5 hashtags per Reel or post. The 30-hashtag block pasted under a caption is over. Pick three to five, all tied to what the post is really about.

Facebook: few or none

Facebook still supports hashtags: its Help Center notes that a hashtag must be one word with no spaces, and that punctuation and special characters won't work. But in April 2025, Meta announced a crackdown on spammy content that specifically targets long captions with an excessive number of hashtags: accounts that post this way get reduced reach. On Facebook, drop the list you carried over from Instagram.

TikTok: hashtags that describe, not decorate

TikTok doesn't publish a recommended number. It lists hashtags among the information that helps classify a video, alongside the caption and the sound. So a hugely popular generic hashtag says almost nothing about your video, while a specific one about the topic, the place or the trade helps TikTok find the right viewers.

LinkedIn: no official number

LinkedIn's help pages don't recommend a number of hashtags. The figures you see floating around come from third-party tools. On LinkedIn, the topic should be clear from the text itself; a few specific hashtags at the end are plenty, and a post with none is fine.

X: 2 max

X is one of the few platforms with a clear number. Its hashtag help page recommends using no more than two per post, even though you can technically add more. A space or punctuation mark ends the hashtag.

YouTube: two or three is enough

YouTube Help sets three rules. If a video has more than 60 hashtags, YouTube ignores all of them. Of the hashtags in your description, up to three, the ones considered most engaging, appear by the title. And hashtags not directly related to the video can get it removed. Two or three relevant hashtags in the description do the job.

Threads: one topic, not a list

Threads works with topics rather than hashtag lists. Per the Threads documentation, a post can carry only one topic, 1 to 50 characters long, with no periods or ampersands. That topic helps Threads show your post to people interested in the subject, so it's the only "hashtag" worth fussing over.

Pinterest: keywords first

Pinterest Help says you can include hashtags in a Pin's description and add up to 10 related topics so people searching for similar ideas can find it. Pinterest behaves like a visual search engine: a title and description written with the words your customers actually type matter more than a string of hashtags.

How do you choose the right hashtags?

Relevance beats volume. Here's a four-step method that works on any platform.

1. Describe the topic in one sentence. Take Hollowmere Candle Co., a fictional hand-poured candle brand in Asheville, North Carolina, posting a Reel about pouring a fig-scented candle. Topic: "hand-pouring a fig candle in a small studio."
2. Pull hashtags from three levels. A specific topic hashtag (#handpouredcandles), a context hashtag (#smallbatch, #ashevillemade), and a brand hashtag if you have one (#hollowmerecandles).
3. Check every hashtag before you use it. Search it on the platform and look at the content it groups. If it doesn't look like yours, or it's off-topic, drop it.
4. Tailor the set to the platform. Five on Instagram, one topic on Threads, one or two on X, next to none on Facebook, two or three on YouTube.

Hashtags never rescue a weak opening. If the first seconds of a video or the first line of a caption don't hold anyone, no tag will make up for it. Our 30 hooks by platform and format are a better use of your time.

Which mistakes should you avoid?

• Copying the same list everywhere. A hashtag block built for Instagram doesn't belong on Facebook, X or Threads. We go deeper in should you post the same thing on every platform.
• Using very broad hashtags (#love, #instagood, #smallbusiness): they say nothing about your content.
• Hijacking an unrelated trending hashtag. YouTube says misleading hashtags can lead to removal, and Instagram explains they expose your content to people who aren't interested.
• Writing unreadable hashtags. For multi-word hashtags, capitalizing each word (#HandPouredCandles) makes them easier to read, including for screen readers, without changing the tag itself.
• Judging hashtags without data. Compare your posts against each other in your analytics instead of swapping lists every time.

How do you know if your hashtags are working?

Your own analytics answer this better than any general rule. For four weeks, keep a stable set and watch the share of accounts reached that don't follow you, saves and shares. Then change one thing at a time. Our guide to measuring social media performance covers which metrics to track and which ones mislead.

Keep in mind that hashtags are a fine-tuning knob. What drives distribution on every platform is how the people who see your content react: watch time, shares, saves, comments.

Frequently asked questions

How many hashtags should you use on Instagram in 2026?

Five at most. Since the official @creators account announcement on December 18, 2025, Instagram allows only 5 hashtags per Reel or post. Three to five specific hashtags tied to the actual topic are enough.

Do hashtags still do anything?

Yes, mostly as a way to classify content. TikTok lists hashtags among the video information used for recommendations, and Instagram explains that relevant hashtags help you reach people interested in the topic. They don't replace a strong hook.

Should you use hashtags on LinkedIn?

It's optional. LinkedIn publishes no official recommendation on how many to use. A clear topic in the text matters more; a few specific hashtags at the end are plenty if you want them.

Can you use the same hashtags on every platform?

No. Each platform has its own rule: 5 max on Instagram, 2 recommended on X, one topic on Threads, few or none on Facebook, two or three on YouTube. Tailor the set to each post.

Where should hashtags go on YouTube?

In the description or the title. YouTube shows up to three hashtags by the title, chosen from those in the description, and ignores every hashtag on a video that has more than 60.

Tailor every post to every platform with Oposto

Keeping a hashtag rule for each platform straight takes time. Oposto learns your brand from your website (voice, colors, products, audience), drafts your posts, carousels and short videos, then adapts each post to each platform, hashtags included. It reviews every post before it goes out with a score and recommendations, publishes to 8 platforms once you approve, and tracks real performance. The free plan doesn't need a credit card: try Oposto.