For years, the hashtag advice was simple: use all 30. More hashtags meant more discovery. But Instagram's own team has explicitly contradicted this — in 2021, Instagram's head of product Adam Mosseri stated that using more hashtags does not help reach, and that 3-5 highly relevant hashtags outperform 30 generic ones.
The algorithm has evolved: Instagram now uses AI to understand and categorize content topics — making keyword-stuffed hashtag blocks less effective than they once were. Hashtags still matter for discovery, but how you use them has fundamentally changed.
This guide covers the current best practices for Instagram hashtags in 2025: how many to use, how to research the right ones, how to structure your hashtag mix, and the mistakes that can actually suppress your reach. For personalized, research-backed hashtag sets for any niche and post type, use our free Instagram Hashtag Generator.
How Instagram Uses Hashtags in 2025
Instagram uses hashtags for two distinct purposes: categorization (helping the algorithm understand what your content is about) and discovery (placing your content in hashtag feeds where non-followers might find it).
The categorization function still works well — hashtags help Instagram's algorithm assign your content to the right interest categories, which affects who it shows your content to. This is why relevant hashtags matter even if no one searches them directly.
The discovery function is more nuanced. Hashtag feeds are real and browsed by users, but extremely popular hashtags (#love, #food, #travel) move so fast that your content disappears within seconds. Less competitive hashtags — where your post can rank in the top 9 for a period — deliver far more sustained discovery.
Instagram also uses AI-based topic categorization independent of hashtags, which means keyword-rich captions increasingly contribute to content categorization whether or not hashtags are used. The combination of relevant hashtags and keyword-rich captions is now the most effective approach.
How Many Hashtags to Use
Current evidence and platform guidance converges on 3-10 hashtags as the optimal range. Here is the reasoning:
**Under 3 hashtags:** You are likely leaving discovery reach on the table. Even 3 well-researched hashtags significantly expand your non-follower reach.
**3-10 hashtags:** The sweet spot. Each hashtag should be specifically relevant to your content — not just your general niche. A post about Instagram analytics should use hashtags specific to Instagram analytics, not just #socialmedia.
**Over 15 hashtags:** Instagram's team has confirmed that excessive hashtags can trigger their spam detection systems. Posts with 20-30 hashtags that are not all directly relevant often receive reduced reach compared to the same post with 5-8 targeted ones.
The quality principle applies: 5 perfectly targeted hashtags will consistently outperform 25 generic ones. Your goal is not to maximize the number of hashtag feeds you appear in — it is to appear in the right hashtag feeds in front of the right audience.
Test this: run your next 10 posts alternating between 5-8 targeted hashtags and your previous approach. Track reach from hashtags in Instagram Insights. Most accounts find the targeted approach delivers more reach within 2-3 weeks.
How to Research the Right Hashtags
Hashtag research is a 15-minute process that dramatically improves your results:
**Step 1: Seed hashtag research.** Search your primary topic keyword in Instagram's search bar. Note the hashtag suggestions that appear — these are real search terms with existing audiences.
**Step 2: Check competitor hashtags.** Look at the top-performing posts from accounts in your niche. What hashtags are appearing consistently? These have proven audiences interested in your type of content.
**Step 3: Check hashtag size.** For each potential hashtag, view how many posts use it: - Under 10K posts: Very niche — high chance of ranking in top 9, but small audience - 10K-100K posts: Ideal for most accounts. Competitive but achievable. - 100K-500K posts: Good for accounts with strong engagement - Over 1M posts: Very competitive — only use if you have high engagement rates
**Step 4: Check if your content can rank.** Click the hashtag and view "recent" posts. If recent posts have thousands of likes and yours typically gets 50-100, you will not rank. Choose hashtags where your posts can compete for top 9 positions.
Building Your Hashtag Sets
- Create 5-8 hashtag sets for your most common post types (educational posts, product posts, behind-the-scenes, etc.) — this saves time and makes testing systematic
- Rotate your hashtag sets rather than using the same hashtags on every post — Instagram can suppress repetitive hashtag use as spammy
- Include at least one branded hashtag in every post — this builds a library of your content and creates a community around your specific handle
- Use location hashtags for local businesses (e.g., #ChicagoRestaurant, #NYCFitness) — these have small but highly relevant audiences
- Place hashtags in the caption for simplicity, or in the first comment for visual cleanliness — both achieve equal reach
- Never use banned or restricted hashtags — use Instagram's search to verify a hashtag is active before using it (banned hashtags show limited posts)
- Update your hashtag sets quarterly — audience sizes and competition change over time
How to Use Our Free Tool
Our free Instagram Hashtag Generator generates a researched, niche-specific hashtag set for any post type in seconds.
Enter your post topic, your niche, and your account size (follower count affects which hashtag size ranges are most appropriate for you to compete in). The tool generates 10-15 hashtags organized by size category — niche, medium, and competitive — with a ready-to-copy formatted set.
Each set is designed for variety across size tiers so you are reaching both small, highly targeted audiences and larger general audiences simultaneously. Pair it with our Instagram Caption Generator to create complete, ready-to-post content in one session.