LinkedIn message ads: specs, limits and cost per send (2026)

LinkedIn message ads are Sponsored Messaging ads that deliver a single message, with one call-to-action button, to a member’s LinkedIn inbox from a real person’s profile. They support website visits, lead generation and website conversions objectives, are billed per send rather than per click, and are delivered only when the member is active on LinkedIn. Members in the EEA and Switzerland receive them only if they opted in to Sponsored Messaging. Think of them as a short, personal email that LinkedIn delivers to people you could never get the address of.

This guide covers the current specs, how message ads differ from conversation ads, frequency and regional limits, the cost model, setup, creative rules and the metrics to use. For the rest of the LinkedIn format menu, see the complete LinkedIn Ads guide.

What is the difference between message ads and conversation ads?

Both are LinkedIn Sponsored Messaging. The difference is the shape of the message.

Rule of thumb: if you can describe the offer and the next step in one sentence, a message ad is enough. If the right next step depends on who the reader is, use a conversation ad.

Are message ads being retired? LinkedIn’s Marketing API documentation has carried a notice since 2023 that LinkedIn is “discontinuing Message Ads, starting May 2023,” and suggests replacing message ad campaigns with conversation ad campaigns. As of October 2026, though, LinkedIn’s help center still documents creating message ads in Campaign Manager and treats them as a current Sponsored Messaging format. Check that the format is offered in your ad account before planning around it, and expect conversation ads to be the format LinkedIn pushes.

Not to be confused with click-to-message ads, which are feed ads whose button opens a conversation with your company; they are a separate format with separate metrics.

LinkedIn message ad specs (October 2026)

From LinkedIn’s “Message ads advertising specifications” and “Create message ads in Campaign Manager” help articles.

How often can LinkedIn send a member a message ad?

LinkedIn does not publish a fixed number in its current help center. Its Sponsored Messaging help article says LinkedIn “strictly controls the number of times a member can see Sponsored Messaging within a given time period,” that repeat exposure to the same ad in a short window is unlikely, and that clicking Not Interested reduces how often the member sees ads from that ad set. Older LinkedIn message ads guides (PDFs on LinkedIn’s marketing site) cited a cap of the same message ad once every 45 days per member; treat that as historical guidance, not a guarantee.

Practical consequences:

• Small audiences exhaust fast. If your audience is a few thousand people, you may deliver to most of the reachable ones within days, then delivery stalls. Budget increases will not fix it.
• Your ads compete with every other advertiser for the same limited inbox slots. A higher bid helps you win delivery, which raises cost per send.
• Plan sequences across formats, not repeated messages. Follow a message ad with Sponsored Content retargeting rather than a second message to the same person.
• Newer messages archive older ones. LinkedIn moves earlier Sponsored Messaging ads to the member’s Archived folder when a newer one is served.

Where are LinkedIn message ads not delivered?

The main regional restriction is Europe. LinkedIn’s help center says it supports targeting the European Economic Area (EEA) and Switzerland for Sponsored Messaging conversation and message ad sets, but “only EEA and Switzerland members who opted in to see Sponsored Messaging ads in their LinkedIn inbox” receive them. A separate LinkedIn help article dates EU support for Sponsored Messaging from mid-October 2024, again limited to members who agreed to see these ads. Members can withdraw consent under Settings, Data Privacy, Messaging experience.

What that means in practice:

• The audience estimate for EEA or Swiss targeting overstates who can actually receive the message.
• Run EEA/Swiss targeting in a separate ad set so you can see its true delivery and cost per send.
• For European audiences, plan on Sponsored Content formats such as document ads and video ads as your main reach, with messaging as a supplement.

LinkedIn’s help center does not list other countries where Sponsored Messaging is blocked. Check delivery by location in Campaign Manager before scaling outside your core markets. Also note the language rule: selecting English reaches only members whose profile language is English.

How much do LinkedIn message ads cost?

Message ads are billed on cost per send (CPS): you pay each time the message is delivered to an inbox, whether or not it is opened or clicked. LinkedIn’s chargeable-clicks help tables list Sponsored Messaging as charged by sends, not clicks. Your actual cost per send depends on your bid, audience size and competition for that audience, and Campaign Manager shows bid guidance when you set up the ad set.

Because you pay per send, the real cost of a result depends on the funnel after it:

Example with made-up inputs: if a send costs $0.40, 40% open and 5% of openers click, each click costs $0.40 / 0.40 / 0.05 = $20. Improving click-to-open rate from 5% to 10% halves cost per click without touching the bid. That is why creative matters more than bid tuning for this format. For how this compares with other formats, see LinkedIn Ads cost.

When should B2B teams use message ads?

Use them for:

• Event and webinar invitations to a defined list (registrants’ colleagues, past attendees, target accounts).
• A single, high-value offer to a warm audience: an assessment, a benchmark report, early access.
• Reaching named buyers you cannot email, via matched company or contact lists.

Avoid them for:

• Cold “book a demo” pitches to broad job-title audiences.
• Audiences mostly in the EEA or Switzerland.
• Anything that needs more than one next step; use conversation ads.

How to set up a LinkedIn message ad

1. Line up a sender. Pick a credible person; request sender permission (1st-degree connections only) well before launch.
2. Create an ad set with website visits, lead generation or website conversions as the objective. Choose the ad set language.
3. Target tightly: retargeting, matched contacts or matched companies, filtered by seniority and function. Split EEA/Swiss targeting into its own ad set.
4. Create the ad: name it, choose the sender, write the subject and message text (macros and up to 3 links allowed), and add optional footer and terms.
5. Set the CTA button (up to 20 characters) and landing page URL; “Not Interested” is added automatically. Add a desktop banner.
6. Attach a Lead Gen Form if the objective is lead generation.
7. Create, then change status from Draft to Active. The ad is reviewed before delivery.

Creative rules for message ads

• Short wins. LinkedIn’s Sponsored Messaging best-practices page says body text under 500 characters drives a 46% higher click-through rate on average.
• Choose the sender carefully. LinkedIn suggests someone relevant to the audience, ideally director-level or above, with a professional face photo visible to all LinkedIn members.
• One ask. Message ads have one CTA button. LinkedIn’s best practices add that hyperlinks in the body lift CTR by 21%; use them to support the same ask, not to offer five different ones.
• Write the subject like a colleague would. Specific beats clever: “Your invite: data platform roundtable, Nov 12” beats “Exclusive opportunity.”
• Survive macro fallbacks. If a member has ad personalization off, “%FIRSTNAME%” becomes “LinkedIn Member.” Write openers that still read naturally.
• Use a banner. It only shows on desktop, but it is extra space for the offer.
• Match the landing page or form to the message. Same headline, same offer, no surprises.

What metrics should you judge message ads by?

LinkedIn’s Sponsored Messaging metrics (Campaign Manager help):

As of July 2024, LinkedIn no longer reports impressions, clicks and related metrics (such as CPM and CPC) for Sponsored Messaging; historical data from before then is unaffected. Rely on sends, opens and the other metrics above.

What to optimize for:

1. Cost per lead or conversion (and, downstream, cost per qualified opportunity). This is the only number that matters to the business.
2. Click to open rate. The best measure of whether the message itself works.
3. Open rate. A test of sender and subject line, not of the offer.

Diagnosing a weak message ad:

• Low open rate: change the sender or subject, or the audience does not recognize you yet; warm it with video or document ads first.
• Good opens, low click to open: the body is too long, the offer is weak, or the CTA is vague.
• Clicks but no conversions: the landing page or form does not match the message.
• Delivery stalls: the audience is exhausted under LinkedIn’s frequency controls; expand it or switch formats.

Reviewing message ads with GTM Hacker

GTM Hacker’s paid ads reviews cover LinkedIn Ads with a weekly scored report and ranked changes, using agents such as LinkedIn Ads Basic Review and LinkedIn Ads Campaign Reporter. Agents only propose changes: spend-affecting and irreversible changes always wait for a person to approve them, and low-risk fixes can be set to auto-approve per campaign, or not.