The short version: hashtags in 2026 work as search terms, not discovery boosters, so stop stuffing thirty generic ones under a caption and start writing three to five that someone would type into the search bar. Instagram and TikTok now reward watch time and saves far more than hashtag volume, but the right hashtags still get you found when someone searches, and that’s where most people are getting it wrong.
Why your hashtags stopped working (they didn’t, your strategy did)
I’ve been posting on social media professionally since MySpace was a thing, and I remember the golden era of hashtags well. Around 2016 to 2018, you could stick #entrepreneur #motivation #smallbusiness under an Instagram post and watch it climb the tag’s own feed within an hour. I built a chunk of my early following that way. Those days are gone, and clinging to that old playbook is why so many small business owners tell me their hashtags “just don’t work anymore.”
Here’s the uncomfortable bit nobody selling hashtag courses wants to say out loud: hashtags are no longer a discovery mechanism on Instagram or TikTok in the way they were. Instagram’s own head of the app, Adam Mosseri, has said publicly that hashtags aren’t a significant ranking signal for reach, they’re closer to keywords for search. That’s a completely different job. A hashtag used to be a lever that pulled your post in front of strangers. Now it’s a label that helps the right stranger find you when they’re already looking.
That distinction changes everything about how you should write them.
The test I ran that proved this to myself
Last year I ran a small experiment on my own Instagram Reels because a client kept insisting hashtags were “the whole game.” I posted two nearly identical reels, same day, same time of day, same talking head format, about AI tools for small business owners. One had three specific hashtags: #aiforsmallbusiness #smallbusinessmarketing #ukbusinessowner. The other had thirty, a mix of huge generic tags like #business #entrepreneur #marketing bolted on alongside the specific ones.
The thirty-hashtag reel got 4,800 views in the first 48 hours. The three-hashtag reel got 6,100. Same hook, same content, better result with fewer, sharper tags. Instagram’s system read the generic-heavy post as spammy and throttled it slightly, while the tighter post got shown to people whose search and interest history matched what I was talking about. I’ve repeated a version of this test three more times since and the pattern holds: five relevant hashtags consistently outperform twenty five vague ones.
If you want the full breakdown of what happens when you test dozens of hashtag combinations rather than guessing, I did exactly that with short funny video content and wrote up what hashtags work best for funny Instagram videos after testing 200 of them, which shows the same pattern in a completely different content category.
How to write hashtags that work, platform by platform
Instagram and TikTok: write them like search queries
Before you write a single hashtag, open the app and type your topic into the search bar the way a real person would. Instagram and TikTok both show you suggested tags with rough post counts. If a tag has 50 million posts under it, you’re invisible in it within minutes. If it has 8,000 to 80,000 posts, you’ve got a fighting chance of showing up when someone searches or browses that tag.
- Use 3 to 8 hashtags, not 30. Instagram allows up to 30 but rewards relevance over volume.
- Mix one broad tag (100k to 1m posts), two or three mid-size tags (10k to 100k posts), and one or two hyper-specific tags (under 10k posts, often your niche or location).
- Put them in the caption itself, not buried in the first comment. That myth about hiding hashtags in comments to keep captions clean stopped mattering years ago; Instagram reads both the same way.
- Never reuse the exact same set of hashtags on every single post. Instagram’s spam systems can flag identical tag blocks posted repeatedly as automated behaviour.
For Facebook Reels specifically, the tag pool behaves a little differently to Instagram even though Meta owns both, so I’d point you to a proper working list rather than guessing. There’s a good rundown of free tools that help you nail hashtags for Facebook Reels if you’re posting there regularly.
LinkedIn: hashtags matter far less than you’ve been told
This is the one that trips up my business consulting clients most. LinkedIn used to let you follow hashtags directly, and posting under a followed tag helped reach. LinkedIn quietly removed hashtag following as a core feature and now leans almost entirely on dwell time, comments in the first hour, and who you’re connected to. Three hashtags at the end of a LinkedIn post is plenty, and honestly one or two well chosen ones will do the same job. If you’re spending real time crafting the “perfect” ten hashtags for a LinkedIn post, that’s time better spent on your first line, because that’s what decides whether the post gets read at all. I go into the mechanics of what does move the LinkedIn algorithm in 2026 in this rundown of hacks that work, and hashtags barely feature in it, which tells you something.
X (Twitter): use them sparingly or not at all
One hashtag, maybe two, tied to a live event, a trending topic, or a specific community tag. Anything more and the platform’s own algorithm tends to read the post as lower quality. I rarely use more than one hashtag on X these days and my engagement hasn’t suffered for it.
The mistakes I see small business owners make constantly
Writing hashtags without checking search volume is the biggest one. If you write #marketing on a post trying to reach small business owners in Leeds, you’re competing with millions of posts from every marketing agency, guru, and course seller on earth. Nobody finds you in there. Swap it for #leedssmallbusiness or #ukmarketingtips and you’ve gone from invisible to findable.
The second mistake is copying a competitor’s hashtag list wholesale. What worked for a US-based influencer with 400,000 followers won’t work the same way for a UK accountant with 800 followers, because the algorithm weighs your existing engagement and audience alongside the tags themselves. Hashtags amplify what’s already working, they don’t create traction from nothing.
The third mistake, and this is the one that surprises people, is not planning hashtags in advance at all and scrambling to bolt them on right before hitting publish. Decent hashtag sets, like decent captions, come from knowing what you’re posting about a week ahead, not five minutes before. If you’re posting on the fly you’ll default to whatever generic tags come to mind, which is exactly the low-effort approach that gets throttled. Building a proper social media calendar gives you the breathing room to research two or three sharp hashtags per platform rather than typing the same five words every single time.
A simple step-by-step for writing hashtags before you post
- Write your caption first, without thinking about hashtags at all.
- Pull out the two or three actual topics your post covers (not vague themes, specific ones: “hiring a virtual assistant,” not “productivity”).
- Search each topic as a hashtag in the app you’re posting to and note the post count.
- Pick one broad tag, two mid-size tags, and one very specific or local tag.
- Check you haven’t used the identical set on your last three posts.
- Post, then check insights after 24 and 48 hours to see whether traffic came from the hashtag pages themselves (Instagram shows this under “reels interactions” or “views by source”).
That last step is the one people skip, and it’s the only way you’ll know if your hashtags are earning their keep at all. Most creators never look, so they keep repeating what feels right instead of what’s measurably working.
Where hashtags fit into the bigger picture
Hashtags were never going to save a weak post, and they still won’t. They’re a small, useful lever that helps the right person find content that’s already good. The order of importance in 2026 looks roughly like this: hook and first three seconds, then watch time and completion rate, then saves and shares, then comments, and hashtags sit somewhere near the bottom, doing a quiet job of matching your post to search intent rather than pushing it out to strangers. Treat them like that and you’ll stop wasting time on them and start using them well.
If you’re building out your wider content and search strategy at the same time, it’s worth remembering hashtags and search engine optimisation share more DNA than people assume, both are about matching what you’ve made to the exact words someone types when they’re looking for it. There’s more on that crossover in these SEO techniques for growing a business if you want to see the same logic applied beyond social platforms.
Frequently asked questions
How many hashtags should I use per post?
On Instagram and TikTok, 3 to 8 relevant hashtags outperform 20 to 30 generic ones in most tests I’ve run, mine included. On LinkedIn, stick to 2 or 3. On X, one is usually plenty. More hashtags do not equal more reach; relevance does.
Do hashtags still help you get discovered by new people?
Not the way they did in 2017. Instagram’s own leadership has confirmed hashtags now function closer to search terms than a discovery boost, meaning they help people find you when they’re already searching a topic, rather than pushing your post to strangers who weren’t looking for it.
Should I put hashtags in the caption or the first comment?
It makes no measurable difference on Instagram; the platform reads both the same way. Put them wherever keeps your caption looking cleanest to you.
Why did my hashtags work before but stop working now?
Platform algorithms shift constantly, and hashtag weighting has dropped significantly across Instagram, TikTok, and LinkedIn over the past few years in favour of watch time, saves, and engagement speed. If a strategy from three years ago has stopped delivering, it’s not you doing it wrong, it’s the platform having quietly moved the goalposts.
Related reading: How to Build a Hashtag Generator Strategy for Facebook Posts (Without Wasting an Afternoon) and How Do You Choose the Best Hashtags for Your Instagram Posts in 2026.
