An Instagram private reply is a direct message a business sends to someone in response to a comment they left on the business's post, reel or ad. Meta allows only one private reply per comment, sent within 7 days of the comment, and you can only follow up if the person answers, within 24 hours of their response.

That's the short version. The rest of this guide covers how it works, every rule with its source, what to write, and the mistakes that waste your one message.

Key Takeaways

  • One private reply per comment, sent within 7 days of the comment.
  • Follow-ups only if the person responds, and only within 24 hours of that response.
  • Non-followers get it in their message requests, so say so in public.
  • On Instagram Live, private replies work only during the broadcast.

How does an Instagram private reply work?

A private reply turns a public comment into a private conversation. The business answers the comment by DM instead of (or as well as) in the comment thread. Here's the sequence, based on Meta's Instagram Private Replies documentation:

  1. Someone comments on your post, reel or ad, for example "price?".
  2. Your account (or your app) sees the comment. Apps receive it through Meta's comments webhook, or live_comments for Live.
  3. You send one private message linked to that comment. Meta's sample request sends a text message.
  4. Meta delivers it. It goes to the person's inbox if they follow your professional account, or to their message requests folder if they don't.
  5. If they reply, a 24-hour window opens and you can keep the conversation going.
  6. If they don't reply, that's it. You can't send a second private message for that comment.

Apps that send private replies must use Meta's official API and permissions. For example, the Instagram API with Facebook Login for Business needs instagram_basic, instagram_manage_comments and instagram_manage_messages, per the same page.

What are the rules for Instagram private replies?

These are the limits Meta sets. Every tool that uses the official API has to follow them.

Rule What it means Source
One private reply per comment You get a single message per comment. Put everything important in it. Meta for Developers, Private Replies
Within 7 days The message must be sent within 7 days of when the comment was made. Meta for Developers, Private Replies
Follow-ups need a response You can only send more messages if the person answers. Meta for Developers, Private Replies
24-hour window Follow-ups must be sent within 24 hours of the person's response. Meta for Developers, Private Replies
Inbox or message requests Followers get it in their inbox. Non-followers get it in their message requests. Meta for Developers, Private Replies
Live comments Private replies can only be sent during the live broadcast. Once it ends, they can't. Meta for Developers, Private Replies
Official access only Apps need Meta's official login and permissions to send private replies. Meta for Developers, Private Replies

What should you write in a private reply?

Write one complete message that lets the person act without asking anything else. Since you may never get a second chance, include the product, the price, the key detail they asked about, and one clear next step.

A good private reply usually has:

  • A greeting in the customer's language. If they wrote in French or Darija, answer in French or Darija.
  • The product name and price.
  • The answer to their actual question (size, delivery, colour).
  • One way to order: a link to your order page or your WhatsApp.
  • An open door: "Any question? Just reply here." A reply from them opens the 24-hour window.

Example private reply

Hi Sara! Thanks for your comment. The [product name] is 199 MAD, delivery in 24 to 48 hours and you pay when it arrives. To order: [link]. Any question about sizes? Just reply to this message.

Then add a short public reply under the comment, like "We just sent you the details by message." That tells the person, and everyone reading, where to look. For more examples, see our guide to answering price comments on ads, or try the free comment reply generator.

What are the common mistakes with private replies?

Most mistakes come from forgetting that you only get one message. Here are the ones we see most:

  • Sending "check your DMs" with nothing useful in the DM. Your one message is gone and the person still doesn't know the price.
  • Not replying in public. Non-followers get your message in their requests folder. Without a public hint, many never see it.
  • Waiting too long. After 7 days, the private reply option for that comment is gone. For a buyer, even a few hours is often too late.
  • Splitting the information. You can't send "price is 199" and then "here is the link" unless they answer in between.
  • Messaging people who aren't asking. A comment that only tags a friend doesn't need a sales message. A light public reply is enough.
  • Using tools that ask for your password. Meta's rules apply to apps using the official API. Tools that log in with your password work outside it and put your account at risk.
  • Missing Live comments. On Instagram Live, you have to reply during the broadcast or not at all.

How do Facebook and Instagram private replies differ?

The core rule is the same on both. Meta's Messenger Platform documentation for Facebook Pages also allows one private reply per comment, within 7 days of the comment (Meta for Developers, Messenger Private Replies). On Facebook, the message arrives in Messenger. On Instagram, it arrives in Instagram Direct.

Instagram Facebook
Private replies per comment One One
Time limit 7 days from the comment 7 days from the comment
Where it arrives Inbox if they follow you, message requests if not Messenger
Documentation Instagram Private Replies Messenger Private Replies

The Instagram page also documents the Live rule (reply only during the broadcast) and the inbox versus message requests split. If you sell on both, write your message once and use it on both platforms.

Tact works inside these rules: it answers Facebook and Instagram ad comments, and sends one private reply to ready buyers within Meta's window, never more. If you're comparing tools, see Tact vs ManyChat, or read how to turn ad comments into COD orders.

Frequently asked questions

How many private replies can I send to one Instagram comment?

One. Meta's developer documentation says only one message can be sent to the commenter, and it must be sent within 7 days of the comment. Further messages are only possible if the person replies.

What is the 24-hour window for Instagram private replies?

If the person answers your private reply, you can send follow-up messages, but only within 24 hours of their response. If they don't answer, you can't send a second message.

Why didn't the customer see my private reply?

If the person doesn't follow your Instagram professional account, Meta delivers the private reply to their message requests folder, not their main inbox. Many people never open that folder, so add a short public reply telling them to check their messages.

Can I send a private reply to an Instagram Live comment?

Yes, but only while the broadcast is live. Meta's documentation says that once the broadcast ends, private replies can no longer be sent to those comments.

Send the right private reply, on time

Tact reads your Facebook and Instagram ad comments, replies in your customer's language, and sends one private reply automatically, only within Meta's window. Complaints and unclear comments wait for you. Start your free trial.