Comment Rate
Social MediaAlso: Comment Ratio
Quick definition
Comment rate is the percentage of people who leave a comment after seeing a social media post, calculated as comments divided by reach or followers. It measures how much a post prompts active conversation rather than a passive like, making it one of the clearest signals of genuine audience interest.
How it varies across Australia
Comment rate varies sharply across platforms and formats. Video-first platforms like TikTok and Instagram Reels typically pull comment rates well above static image posts, and niche communities outperform broad-reach accounts. A high follower count does not guarantee a high comment rate, and the two often move in opposite directions.
See social engagement benchmarks across Australian industries →What it actually means
A like costs nothing. A comment costs a thought, a sentence, sometimes the risk of being wrong in public. That's why comment rate matters more than reach or impressions when you're trying to gauge whether a post actually landed.
Comment rate is comments divided by reach (or followers, if reach isn't available), expressed as a percentage. It sits inside the broader engagement rate calculation but deserves its own read, because comments and likes mean different things. A post can rack up thousands of likes and almost no comments, which usually means it was easy to agree with but gave nobody a reason to say anything.
Platforms treat comments as a stronger ranking signal than likes for exactly this reason. The algorithm reads a comment as proof the content held someone's attention long enough to provoke a response. That's worth more to a distribution system than a passive tap.
The number on its own doesn't tell you if the comments were praise, confusion or complaints. You have to read them.
A comment is a vote of attention a like can't buy. It costs the viewer something a tap doesn't.
How to calculate it
Comment Rate = (Number of comments ÷ Reach or Followers) × 100
Worked example. A post reaches 10,000 accounts and receives 85 comments. Comment rate = (85 ÷ 10,000) × 100 = 0.85%.
The Australian context
Australian brands running giveaway-style call-to-action prompts ('tag a mate') see comment rate spike without any real gain in ugc or brand affinity. It's worth separating prompted comments from organic ones when reporting to a client or a board, because the two tell completely different stories about whether the content itself worked.
Where people get this wrong
Related terms
Common questions
What counts as a good comment rate?
It depends heavily on platform and format, so there's no universal number worth chasing. Judge your own posts against your own historical average first. A post scoring noticeably above your typical comment rate is worth studying for what made it different.
How is comment rate different from engagement rate?
Engagement rate combines likes, comments, shares and saves into one number. Comment rate isolates just the comments. Comments require more effort than a like, so a strong comment rate is a sharper signal of genuine interest than engagement rate alone.
Why do bots inflate comment rate?
Automated engagement pods and spam bots leave generic comments to game the algorithm's preference for active discussion. This raises the comment rate number without reflecting real audience interest, which is why the metric needs a manual read alongside the raw figure.
Does a high comment rate mean the algorithm will boost my post?
It helps. Most platform algorithms treat comments as a stronger signal than likes when deciding how far to distribute a post. A high comment rate early in a post's life often correlates with wider reach later, though it's one input among several.
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About New Rebellion
New Rebellion is a marketing intelligence consultancy. We build tools, score Australian businesses on how their marketing actually performs, and publish Debrief every day. This dictionary is part of how we work in the open.
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