LinkedIn InMail best practices: how to write and send a message that is worth the credit it costs.

LinkedIn InMail best practices, in short

LinkedIn InMail best practices come down to one test: is this message worth the credit it costs, to you and to the person reading it? An InMail is a paid interruption from a stranger, and the recipient sees the label before they read a word of your writing.

That changes what good writing looks like. The message has to be short, written for one person, and easy to answer in a line. It also has to be worth answering with a no, because a decline returns your credit while silence does not.

• Spend the credit only when the free route is closed. A connection request with a note reaches most people for nothing.
• Open on their reason, not yours. LinkedIn Help tells senders to mention the profile content that prompted the message.
• Make one ask. A second question turns a one-line reply into a task, and tasks get postponed.
• Write a subject line that names the thing. The subject is optional, and an empty one wastes the only preview you get.
• Plan for no follow-up. LinkedIn does not let you send a second InMail until the first one is answered.
• Judge the channel on replies per credit. Messages sent is not a number worth reporting.

Before you spend a credit, check the cheaper routes

Every InMail competes with a free alternative. Work through the routes in order and stop at the first one that is open, because the paid route is also the one that arrives with a sales label attached.

LinkedIn Help describes the difference plainly. InMail is a Premium feature for messaging members you are not connected to, while a personalized invitation is a note attached to a connection request.

Basic accounts get three personalized invitations a month in one Help article and five in another, each with a 200 character note. Premium accounts get unlimited notes, each up to 300 characters.

The last row matters more than people expect. LinkedIn Help states that you cannot message a member who has chosen not to receive InMail in their message preferences settings, so a list built without checking will have holes in it. Our what InMail is entry covers the mechanics.

Credit rules, expiry and returns

Writing well is cheaper when you know what a credit is. LinkedIn Help publishes the allotments, the accumulation caps and the return rule, and those three numbers decide how selective you have to be each month.

Credits arrive on the first day of your billing cycle, except on Sales Navigator, where they renew on the first day of every calendar month in UTC. LinkedIn Help says credits expire after 90 days, and that unused Sales Navigator credits carry over but still have to be used inside that window.

• A reply returns the credit. Any InMail accepted, declined or answered directly within 90 days of sending is credited back.
• A no counts. In Sales Navigator, "Interested" and "Maybe later" register as accepted and "Not interested" as declined, and all three return the credit.
• Silence does not. A pending InMail is neither accepted nor declined, so the credit stays spent.
• Quick replies count. LinkedIn treats quick replies and auto replies as responses for crediting purposes.
• You cannot buy more. There is no unlimited plan and no way to purchase credits outside the monthly allotment.
• They do not travel. Premium credits cannot be used on Sales Navigator or Recruiter, and the balance goes to zero when a subscription is canceled.

Open profiles, and the InMails that cost nothing

Open Profile is a Premium setting a member turns on so that anyone can contact them for free, even from outside their network. LinkedIn shows the full profile of those members to everyone, which is the easiest way to spot one before you open the compose window.

There is a catch worth knowing. LinkedIn limits how many Open Profile messages you can send in a given period, and says so on the help page itself. In Recruiter that cap is published per seat per month; on ordinary accounts the limit exists without a published number.

The practical effect is simple. Check for Open Profile on every account on your list before you spend anything. The message is written the same way, with the same subject and the same single ask, and the only difference is your balance at the end of the week.

How to write an InMail: the four parts

Every InMail that reads like a person has the same four parts in the same order. The proportions are what most senders get wrong, because they spend three sentences on themselves and one on the recipient.

LinkedIn Help gives the same shape from the other direction. It tells senders to be brief, to mention the profile content that prompted the message, and to share mutual experiences or connections.

It also asks them to explain what they hope to get from the conversation, and to give the reader a reason to reply by asking for advice, an opinion or a referral. That last instruction is the one sales writing skips most often.

It also tells recruiters not to paste a job description or a link in place of writing. The sales version of that mistake is pasting a value proposition. If the paragraph would work unchanged for 200 people, it is not an InMail, it is a mail merge that costs a credit each time.

InMail subject lines that earn the open

The subject line is optional, up to 200 characters, and it is the only part of the message most recipients see in a notification. Leaving it blank hands LinkedIn the job of previewing your first sentence, which is rarely the sentence you would have chosen.

LinkedIn's own guidance for Recruiter asks for a direct, informative subject line that captures attention. In sales, the useful version of informative is a noun phrase naming the specific thing, with no pitch and no question mark.

Write the subject last. Once the body is finished you know what the message is actually about, and the subject becomes a summary instead of a guess. The same discipline applies to professional email subject lines.

How long should an InMail be?

The body limit is 1,900 characters in Sales Navigator and Recruiter Help and 2,000 in the general InMail FAQ, and our LinkedIn character counter uses the lower figure. That ceiling is not a target.

The first instruction on LinkedIn's own best practices page is to be brief and to the point, and its Recruiter guidance says simpler, more direct messages produce more responses.

There is a mechanical reason as well as a stylistic one. Most people read InMail on a phone, where a long message becomes a wall before the ask is visible. If the reader has to scroll to find out what you want, the reply turns into a decision instead of a reflex.

The one ask, and why a second one kills the reply

An InMail should contain exactly one thing to answer. Two asks force the reader to decide which one to handle first, and a message that needs a decision gets moved to later, which on LinkedIn usually means never.

• Ask for an answer, not a calendar slot. A meeting request from a stranger is the largest ask available; a question is the smallest.
• Make no a real option. Saying that a one-line no is genuinely useful raises the chance of a reply, and a decline returns your credit.
• Offer something either way. If the useful thing arrives whatever they answer, the reply costs them nothing.
• Do not ask them to click. Links in a first InMail read as a campaign, and LinkedIn tells senders not to substitute a link for writing.
• Ask about them. Advice, an opinion or a referral are the three requests LinkedIn Help names as reasons a person replies.

An ask that is easy to answer also protects your account. Replies are what return credits and what keep a sending history healthy, and both matter more than the number of people you reached this week.

How to write an InMail, step by step

1. Check the free routes first

   First-degree connection, Open Profile, or someone who accepts requests: all three reach the person without a credit. Spend one only when none of them is open.

2. Read the profile and the contact preferences

   LinkedIn shows what messages a member is open to under Additional Info on their profile. Read that, the About section and their last few posts before you write anything.

3. Open on what you read

   The first sentence names the post, the hire, the move or the talk that prompted the message. If you cannot name one, the person is not ready to be written to yet.

4. Bridge to their situation

   One or two sentences linking what you read to something you see with teams like theirs. No company boilerplate, no feature list, no attachment.

5. Make one ask they can answer in a line

   A single question about their situation, with an offer that stands whether the answer is yes or no. Say that a short no is welcome.

6. Write the subject, then cut

   Summarize the finished message in five to eight specific words, then delete every sentence that does not serve the ask. Aim well under 400 characters.

Three InMail examples written for this page

These three examples were written for this page. They are not real messages to real people, and the names, roles and details in them are placeholders, to be replaced with something you actually read on a profile.

Each one follows the same shape: a subject naming a specific thing, an opening that proves reading, a bridge in one sentence, and one question with an exit. Every one of them still works if the answer is no, which is the point.

The same InMail, rewritten

The version on the left is the one almost everybody writes first. Both were written for this page. Marked phrases are the ones doing the damage, and the rewrite is shorter than the original by more than half.

Follow-up: what LinkedIn actually allows

This is the rule most outreach advice gets wrong. LinkedIn Help states that InMail is designed for initial outreach only, and that you cannot send a follow-up InMail unless the recipient accepts and responds to your first message.

If they decline, or say nothing at all, further InMails are not permitted. The credits page repeats it from the other side: you cannot send another InMail to a member until they respond to the first one you sent.

LinkedIn does one piece of follow-up for you. An automatic reminder goes to the recipient within three days of the InMail being sent, so a message that went unanswered has already been surfaced twice before you start worrying about it.

So the follow-up plan has to live outside InMail. Put the next touch on email, a connection request or a comment on their next post, and build those touches into a sales cadence rather than into the InMail itself.

Measuring replies without chasing a benchmark

LinkedIn defines an InMail response rate as accepted plus declined messages divided by messages sent, and its Recruiter reporting counts only responses received in the first 30 days after sending. That definition is worth copying, because it treats a no as a result rather than a failure.

Two habits keep the measurement honest. Track by list, not by month, because a good list flatters a bad message. And track the free path in parallel: if invitations plus messages produce the same meetings for nothing, the credits are buying you speed, not results.

On the Recruiter side, LinkedIn enforces a documented response rate floor as account policy rather than as a target to hit. It is worth knowing that such a threshold exists, because it is the platform saying out loud that low-reply sending is a problem it acts on. LinkedIn analytics covers the reporting side more broadly.

Sending practice, volume and account health

How you send matters as much as what you write. LinkedIn's InMail policy for Recruiter spells out the behaviors it acts against, and the same logic applies to sales accounts even where the wording is recruiter specific.

• No untargeted mass sending. The policy names unwanted or untargeted mass InMail as a violation, in plain language.
• Not a marketing channel. InMail is not for marketing campaigns or event invitations, according to that same policy page.
• Filters are automatic. Messages pass through LinkedIn's filtering system, and repeated flags disable sending until the next day in UTC.
• Volume follows credits. On Premium and Sales Navigator your practical ceiling is the balance shown in the compose window as you write.
• Automation raises the risk. Third party sending tools sit outside LinkedIn's user agreement, and the cost lands on the account, not on the tool.

A restricted account is the expensive version of this mistake, because the list, the credits and the message history go with it. Our entries on LinkedIn automation and a restricted LinkedIn account cover what triggers a review.

Using templates without the template smell

Templates are not the problem. Sending the same relevant information to everyone is. A template should hold the structure and the sentences that never change, and leave every line that carries a fact about the reader empty until you write it.

A simple test before sending: delete the first name and the company name. If the message still works for the next person on your list, the content is generic and you are about to spend a credit on a mail merge. That test catches most weak InMails in a second.

Volume follows from that, not the other way around. Ten messages you could only have written to ten people will reach more real conversations than fifty templates, and they keep the credits coming back. Our sales templates hub has the same rule for email work.

Mistakes that waste credits

• Sending to someone who accepts requests. A free invitation with a note does the same job and leaves you connected afterward.
• Writing to the full character limit. Length is the clearest signal that a message was written once and sent many times.
• Leaving the subject blank. The preview then comes from your first line, which was written for a reader who already opened the message.
• Two asks in one message. Every extra question lowers the chance that the first one gets answered.
• Planning a follow-up InMail. LinkedIn does not permit one until the recipient replies, so the sequence breaks at touch two.
• Pitching before the reader knows why you wrote. The InMail label already suggests a pitch, and leading with one confirms it, which is what makes a message read as salesy.
• Counting sends instead of replies. Credits returned is the number that tells you whether the writing worked.
• Skipping the contact preferences. Members can switch InMail off, and a list that ignores that setting reports blocked sends as silence.
• Treating InMail as the whole plan. It is one touch in LinkedIn prospecting, not a channel that carries a sequence by itself.

The template

This template was written for this page. It is the first contact version, for a prospect outside your network who does not have Open Profile enabled, and it assumes you have read something they published.

Subject: {{specificThing}}

Hi {{firstName}},

Your {{post or talk}} on {{topic}} matched something we see with {{teamType}} teams: {{observation}}.

One question: {{oneQuestion}}? A one-line no is genuinely useful too, and I will send {{resource}} either way.

{{senderName}}

Frequently asked questions