What Is Cost per Messaging Conversation Started?

This is the headline price tag for click-to-message ads: how much you paid, on average, for each chat your ads opened. The number only means something once you know what Meta counts as a “conversation started”, because a returning customer who messaged you yesterday does not count again, while one who comes back after a quiet week does.

How does Meta calculate it?

Meta divides the amount spent by the number of messaging conversations started. For example, if you spend $300 and Ads Manager reports 120 messaging conversations started, your cost per messaging conversation started is $300 ÷ 120 = $2.50.

A second Meta definition page, written for ads that click to Messenger, describes the same idea: the total spent on those ads divided by the messaging conversations started attributed to them.

What counts as a messaging conversation started?

Meta defines it as the number of times people started messaging your business after at least 7 days of inactivity, attributed to your ads. In practice it counts accounts that:

• message your business for the first time, or
• message again after 7 days or more without activity.

Meta labels this metric as in development.

What is excluded?

Situation	Counted?
Someone who last messaged you 3 days ago messages again	No, fewer than 7 days of inactivity
WhatsApp chat that did not start from a click on your ad	No, Meta counts WhatsApp only from ad clicks
Conversations from ads delivered to and from Europe and Japan	No, Meta excludes them
First message from a new person after tapping your ad	Yes

How do you see it per chat app?

If your ad sends people to more than one messaging app, open the campaign in Ads Manager, click Breakdown, then Action, then Messaging outcome destination. This splits results by Messenger, Instagram and WhatsApp.

When is it the wrong number to judge by?

When your goal is sales. Meta says that if you choose purchases through messaging as the performance goal, you should measure the campaign on Meta purchases and cost per on-Meta purchase rather than conversations started. A cheap conversation that never turns into an order is not a cheap result.

FAQ

Why did my conversation count drop when nothing changed?

Repeat customers may be the reason. Meta only counts someone again after 7 days of inactivity, so if more of your chats come from people who messaged recently, the metric falls even with the same number of chats. Ads delivered to and from Europe and Japan are also excluded from this metric.

Is cost per messaging conversation started the same as cost per result?

Not always. Meta calculates cost per result as amount spent divided by results, and says it shows how cost-efficiently you achieved the objectives you set. Cost per messaging conversation started always divides by conversations started, whatever result you optimise for, so add both columns.

Does a conversation mean the person replied to me?

No. Meta’s definition counts people starting to message your business, attributed to your ads. It says nothing about whether you replied or whether the chat led to a sale. Track replies in your inbox and purchases through Meta’s purchase-through-messaging tools.