InMail is how you message a LinkedIn member you are not connected to, and the most misunderstood tool in outreach. Credits, caps, credit-backs, and the eternal question of whether InMail even outperforms a plain connection request: this guide settles the mechanics first and the strategy second.
How many InMail credits do you get?
Per LinkedIn's own documentation: Premium Career includes 5 credits per month, Premium Business 15, Sales Navigator Core 50, and Recruiter Lite 30. Unused credits roll over up to a ceiling of roughly three months of allotment: 15 for Premium Career, 45 for Premium Business, 150 for Sales Navigator, 120 for Recruiter Lite, and 5 per job on Hiring Pro. Two separate rules get conflated here: accumulation is capped, and unused credits also expire after 90 days. Credits refresh monthly on your billing date, except Sales Navigator Core, which renews on the last day of each month.
| Plan | Credits per month | Accumulation cap | Renewal date |
|---|---|---|---|
| Premium Career | 5 | 15 | First day of billing cycle |
| Premium Business | 15 | 45 | First day of billing cycle |
| Sales Navigator Core | 50 | 150 | Last day of every month |
| Recruiter Lite | 30 | 120 | First day of billing cycle |
| LinkedIn Hiring Pro | 5 per job post | Per-job allotment | Tied to the job posting |
Two renewal quirks trip people up. Sales Navigator Core renews on the last day of every month, not on your billing date like the Premium tiers, so a mid-month subscriber gets the first refill sooner than expected. And accumulation is not the only clock: individual unused credits also expire 90 days after they are granted, so the cap describes the ceiling, not a guarantee that old credits wait for you.
Who can you message without spending a credit?
The credit meter only runs on cold, out-of-network messages, and the free surface is bigger than most senders realize. Messaging your first-degree connections never costs anything. Members with Open Profile turned on, common among salespeople, recruiters, and creators who want inbound, can be InMailed at zero credit cost from any paid plan. People who apply to your job postings can be messaged free. And replying inside any existing conversation is always free, which is why the smartest InMail strategy treats the first message as the only expensive one and optimizes everything for starting a conversation rather than delivering a pitch.
What are the InMail character limits?
The documented limits: up to 200 characters in the required subject line and up to 1,900 characters in the body, with a dynamic counter appearing in the composer as you approach them. Amusingly, LinkedIn's own pages disagree with each other: the dedicated character-limits page says 1,900 while the general send-an-InMail page says 2,000. Treat 1,900 as the safe number. The counter is not neutral either: LinkedIn's help page notes it changes color as messages get longer, encouraging you to stay concise, because its own data says shorter wins.
How does the credit-back rule work?
Every InMail that gets a response, an accept, or a decline within 90 days of sending returns its credit. Read that as LinkedIn paying you to be relevant: a well-targeted InMail campaign recycles a large share of its credits, while spray-and-pray burns the balance and stays burned. The rule quietly rewards short, specific messages to people likely to answer either way.
What does LinkedIn's own data say about response rates?
LinkedIn published a study of tens of millions of recruiter InMails, and it is the only response-rate data on this subject that is not vendor marketing. The shortest InMails, under 400 characters, get a response rate 22% higher than average, while the longest run 11% below average. InMails sent individually beat bulk sends by roughly 15%. Saturday sends earn 8% fewer responses than average. And targeting beats copy: members flagged Open to Work respond at rates 37% higher.
Read those numbers together and the playbook writes itself: short, individual, personalized messages sent on weekdays to people showing intent signals. Every practice that makes InMail feel less like a campaign raises the odds of the reply, which, through the credit-back rule, also refunds the credit.
InMail vs connection request: which wins?
They solve different problems, and the credit question is narrower than most people assume: InMail credits are consumed only when you message someone outside your network. Messaging a first-degree connection, an Open Profile member, or a job applicant is free, and LinkedIn's Recruiter interface flags those as Free before you send. A connection request costs no credits, opens a permanent messaging channel once accepted, and grows your network as a side effect; it is the default motion for volume outreach. InMail skips the acceptance step, lands with a subject line like email, and reaches people who ignore invitations, at the price of scarcity. The operating pattern that performs: connection-first sequences as the backbone, InMail reserved for high-value targets that did not accept, which is exactly how mixed sequences run on multi-sender campaigns.
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How do you write InMails that earn the credit back?
The credit-back rule turns writing quality into a measurable budget line: any response within 90 days, including a decline, refunds the credit. That makes the mechanical goal provoking any reply at all, and the writing that does it reads nothing like a template blast. Reference something specific and recent about the person, keep it short enough to read entirely in the notification preview, ask one question that is easy to answer, and skip the deck attachment. A high-response InMail motion effectively recycles its credits; a low-response one burns the monthly allotment and stalls. Track your own credit-return rate month over month: it is the only InMail metric that compounds.
Can you buy more InMail credits?
It depends entirely on the product, and the differences are documented. Recruiter Lite admins can buy additional credits in packs of 10, up to 70 extra per seat, with a hard contract ceiling of 120 InMails per seat. Corporate Recruiter seats come with 150 credits and additional ones can be purchased. Sales Navigator is the strict one: LinkedIn states you cannot purchase additional InMail credits for Sales Navigator accounts at all. And on Premium Career or Business, the only path to more credits is upgrading the plan. If your motion depends on InMail volume, this table quietly decides which product you should be on.
Can you automate InMail?
Yes, inside the same safety rules as everything else on LinkedIn. InMail steps belong in sequences as conditional branches rather than blasts, volume should track your credit recycling rate, and the account-level pacing that protects invitations protects InMail too. Swarmhit supports InMail as a native sequence action alongside messages, voice notes, and post comments. The broader risk picture lives in our LinkedIn automation safety guide.
FAQ
Do InMail credits expire?
They accumulate up to your plan's cap and stop growing there. The cap is roughly three months of monthly allotment, per LinkedIn's documentation.
Is there a daily InMail limit?
It depends on the product. Recruiter and Recruiter Professional Services seats can send up to 1,000 InMails per day per seat, with a documented 200-InMail cap during a new seat's first week. Open Profile messaging has its own ceilings: 350 messages per calendar month per Recruiter seat, and 100 per month on Recruiter Lite. Premium and Sales Navigator plans have no published daily number; the monthly credit allotment is the practical constraint.
Why did my InMail credit come back?
The recipient responded or declined within 90 days. Both outcomes return the credit under LinkedIn's stated policy.
When do InMail credits renew?
On the first day of your billing cycle for Premium Career, Premium Business, and Recruiter Lite. Sales Navigator Core is the exception: it refills on the last day of every calendar month. Unused credits carry forward up to your plan's cap, but each credit also expires 90 days after it was granted.
Do free LinkedIn accounts get InMail?
No. InMail credits come only with paid plans. A free account can message first-degree connections, reply in existing threads, and attach a note to a connection request, which for many outreach motions is the better opening move anyway.
Conclusion
InMail rewards precision: small volumes, sharp targeting, and the credit-back loop doing the accounting. Keep it as the scalpel inside a connection-first motion, and the 50 credits on a Sales Navigator seat go a surprisingly long way. For where InMail fits among every other action, see our LinkedIn prospecting tools guide.
