The drag percentage is your assumption, not a figure we invented — no platform publishes it. Set it low if your comments are mostly harmless clutter, higher if they contain scams, competitor links or unanswered complaints. The other three inputs are things you can check today.
What is this calculator?
Every taka you spend on a boosted post buys two things: the creative you approved, and the comment section underneath it that you did not. When someone clicks through and finds fake customer-service accounts, competitor links, or three unanswered complaints about delivery, your money bought the objection instead of the sale.
This tool sizes that exposure. It does not claim a universal damage rate, because none exists. It takes your spend, how much of it runs where comments are visible, how often those comments are compromised, and the drag you believe that causes — then shows the monthly figure.
Why the comment section is part of your ad creative
A cold audience reads comments as social proof, and they trust them more than your copy precisely because you did not write them. That works in your favour when the comments are real questions and answers. It works against you when the top comment is a scam account impersonating your brand, which on a well-performing ad in Bangladesh happens within hours.
The three inputs you can verify today
Open your ads manager and check what share of spend sits on comment-enabled placements. Then open the three highest-spending posts and read the top ten comments on each. That sample tells you the affected share more honestly than any benchmark, and it usually takes under ten minutes.
Frequently asked questions
Is there a published figure for how much bad comments cost an ad?
No, and you should distrust anyone quoting one as fact. Meta does not report it and it varies enormously by category and audience temperature. That is why the drag input here is yours to set — the tool gives you the arithmetic, you supply the judgement.
Should I just turn comments off on ads?
Usually not. Comments are a large part of why paid social converts, and disabling them removes the buying questions along with the spam. Hiding what is harmful while keeping what is genuine is a better trade than going silent.
Which placements are most at risk?
The ones performing best. Reach attracts spam, so your strongest ad accumulates the worst comment section, and it does it fastest at night when nobody is watching. High spend and low supervision arriving together is what makes this expensive.
How quickly does this change after moderation is switched on?
The comment sections clean up immediately, since hiding is instant. The performance effect, if you are measuring one, shows up over the following weeks as new impressions land on clean posts rather than compromised ones.
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