The short version: the hashtags that boost engagement in 2026 are small and medium ones between 5,000 and 200,000 posts that match exactly what’s in your image, not broad tags like #love or #instagood with tens of millions of posts. Volume of hashtags matters less than relevance, and the biggest lie in most hashtag advice is that hashtags drive discovery at all anymore, they mostly just tell Instagram’s algorithm what your post is about so it gets shown to the right small pocket of people.
Why I stopped believing hashtags were a growth hack years ago
Back in 2019 I ran an experiment with a small handbag brand client. We put 30 hashtags on every post, mixed sizes, changed them weekly, tracked everything in a spreadsheet for eight weeks. Engagement moved by less than half a percent either way. What moved the needle that quarter was posting three Reels a week instead of static images. That’s when I quietly filed hashtags under “nice to have” rather than “growth lever” and I’ve watched most of the internet keep treating them as the second thing when they’re closer to the fifth or sixth.
Instagram’s own head of the app, Adam Mosseri, has said publicly on record that hashtags contribute very little to how content gets distributed now, because the algorithm reads your caption, your image content through computer vision, and audience behaviour far more than it reads the tags themselves. That’s an uncomfortable thing for anyone selling a “50 hashtag formula” course, but it’s the truth and it changes how you should use them.
So what do hashtags do in 2026 then
They do three small but real jobs:
- They help Instagram classify the topic of your post so it can slot you into the right niche feeds and Explore categories
- They give people who search hashtags directly (a smaller behaviour than it used to be, but still real for topics like #ukbusinessowner or #copywritertips) a way to find you
- They act as a signal of context for accounts that already follow similar hashtags or topics, feeding your content into their “For You” style recommendations
None of that is discovery in the old 2016 sense of “add #photooftheday and get found by strangers.” That version of hashtags is dead. What’s left is narrower and more useful if you use it right.
The hashtag sizes that correlate with engagement
Here’s the number that matters most: hashtags with under 500,000 posts consistently outperform hashtags with 5 million plus posts for engagement rate, because your post isn’t drowning in a feed refreshing every second. I’ve tested this across client accounts in coaching, e-commerce, and B2B services, and the pattern holds every time.
A workable mix looks like this on a single post:
- 2 to 3 hashtags between 5,000 and 50,000 posts (niche, specific, low competition)
- 2 to 3 hashtags between 50,000 and 300,000 posts (mid-size, still relevant)
- 1 hashtag between 300,000 and 1 million (a bit of stretch reach)
- Skip anything over 1 million entirely unless it’s a branded or event hashtag you need
I go into exact sizing and how to check post counts in the best hashtags to use for maximum reach, but the short version is: check the number before you use a tag, not after.
The client example that proved the small-hashtag theory
A skincare client came to me in early 2025 getting 40 to 60 likes and maybe 2 comments per post on 8,000 followers. We swapped her 20 generic hashtags (#skincare, #beauty, #glowup, all with tens of millions of posts) for 9 hashtags, all under 150,000 posts, all describing the actual product category she sells (things like #naturalskincareuk and #sensitiveskinroutine rather than #skincare). Within three weeks her average comments went from 2 to 5 per post, a 150 percent jump, and saves on posts doubled. Nothing else changed in her posting schedule or content style. That’s the difference relevant, smaller hashtags make when everything else stays the same.
The hashtags to drop immediately
These are the ones I remove from every client account without exception:
- Anything with “gram” in it like #instagram or #instagood, they attract bots more than humans
- Generic emotion tags like #love, #happy, #motivation with 500 million plus posts, you’re a raindrop in an ocean
- Follow-for-follow tags like #followforfollow or #f4f, these attract exactly the wrong audience, people who follow and unfollow within days
- Anything that hasn’t been used in the last hour when you check it, a dead or slow hashtag means Instagram has effectively stopped surfacing it
That last point is worth thirty seconds of your time before every post. Search the hashtag, look at the “recent” tab, and if the most recent post is six hours old rather than six minutes old, that hashtag is quietly dying and won’t help you.
How to build a hashtag set, step by step
- List 10 to 15 words that describe exactly what’s in the specific image or Reel, not your brand in general
- Search each word as a hashtag and note the post count Instagram shows under it
- Sort into the size buckets above and pick your final 7 to 9 hashtags
- Check the “recent” tab on each one to confirm it’s active within the last hour
- Save 4 or 5 different sets in your notes app for different content types (product shots, behind the scenes, tips posts) so you’re not rebuilding this every time
- Rotate sets rather than using the exact same 9 hashtags on every single post, Instagram has flagged accounts for hashtag spam when the same set appears dozens of times in a row
- Review performance monthly and drop any hashtag that stops showing up in your insights as a source of reach
Nine hashtags is plenty. You can technically use 30, but past 9 to 11 relevant ones, the extra tags add clutter to your caption without adding measurable reach. Fewer, more specific hashtags beat a wall of them.
Where to put them and whether the first comment trick still works
Putting hashtags in the first comment rather than the caption used to be common advice to keep captions clean. It still works fine for reach, Instagram treats hashtags in the first comment the same as hashtags in the caption itself. The main reason to move them isn’t performance, it’s readability, a caption stuffed with 15 hashtags at the bottom looks messy and can hurt trust with someone deciding whether to follow you. I put mine at the end of the caption after a line break, or in the first comment if the caption already runs long.
Hashtags won’t fix a weak content or growth strategy
This is the bit that’s uncomfortable to hear if you’ve been hoping hashtags are the missing piece. They’re not going to rescue a post nobody wants to watch, save, or share, and they’re not a substitute for a real growth plan. If your account is stuck under a few hundred followers, the issue is almost always posting consistency, content quality, or a lack of proper outreach, not your hashtag selection. I’ve written about the organic growth methods that move accounts forward when hashtags alone plateau, and it’s worth reading before you spend another hour tweaking tags.
If you’re short on time, tools that help you research and schedule matter more than the tags themselves. I’ve used Combin for hashtag research and competitor analysis, and covered exactly how in this Instagram growth strategy breakdown. Pairing good hashtag research with a scheduling routine, which I walk through in how to automate your Instagram posting, does more for engagement over three months than any single hashtag ever will.
What to check on your competitors before you copy their tags
Before I finalise a hashtag set for a client, I look at three or four accounts doing well in the same niche and check which hashtags they’re using and how their engagement looks on recent posts, not just follower count. High followers with low comments usually means bought or bot followers, and copying their hashtags won’t help you. I cover how to check an account’s real numbers in how to snoop into Instagram accounts, and it takes ten minutes to sanity check a competitor before you borrow their tags.
Branded hashtags are the one type worth building from scratch
Every client I’ve taken through this process ends up with one branded hashtag, something short and specific to them, like a campaign name or a slogan. It won’t bring in new followers on its own, but it lets you find and reshare content from customers, and it builds a small searchable archive of your own posts. It’s a long game measured in months, but it’s the one hashtag type that gets more useful the longer you use it, unlike trending tags that lose relevance within weeks.
The bottom line on testing your own hashtags
Your niche, your audience, and your posting times are different from mine and different from every case study you’ll read, mine included. The only way to know which hashtags boost engagement for your account is to track it in your own Instagram Insights under the reach breakdown for each post, note which hashtag sets you used, and compare after four to six weeks. Run it like the test I ran on that handbag account back in 2019, just make sure you’re testing small relevant hashtags against irrelevant broad ones, not shuffling hashtags randomly and hoping something sticks.
Related reading: copy hashtags from instagram reels free.
Frequently asked questions
How many hashtags should I use on Instagram in 2026
Use 7 to 9 relevant hashtags rather than the maximum of 30, mixing small tags under 50,000 posts with a few mid-size ones under 300,000 posts for the best balance of reach and relevance.
Do hashtags in the first comment work as well as hashtags in the caption
Yes, Instagram treats hashtags in the first comment the same as hashtags in the caption for reach purposes, so use whichever keeps your caption cleaner and easier to read.
Why did my hashtag engagement drop even though I use the same tags every time
Reusing the exact same hashtag set on every post can look like spam to Instagram and also means you stop reaching new pockets of the same niche, so rotate 4 or 5 different sets based on content type instead.
Are big hashtags like #love or #instagram worth including for reach
No, hashtags with tens or hundreds of millions of posts bury your content within minutes and consistently show lower engagement rates than smaller, specific hashtags under 500,000 posts.
Useful references
Related Instagram guides are collected in every Instagram fix and setting in one place and the Instagram engagement rate calculator.
