Most LinkedIn users treat InMail credits like a monthly budget that just disappears. They send a batch, get a handful of replies, and wait for the counter to reset. That is not how the system works — and the gap between how it works and how most people use it is where credits get wasted.
What does LinkedIn actually give you per plan, and what does the SERP get wrong?
The allowances are straightforward, but a lot of articles online mix up current figures with outdated ones. Here is the current breakdown by plan:
- LinkedIn Premium Career: 5 credits per month
- LinkedIn Premium Business: 15 credits per month
- Sales Navigator Core: 50 credits per month
- Recruiter Lite: 30 credits per month
Unused credits roll over for up to 3 months. That ceiling matters: if you are on Sales Navigator and send nothing in January, you do not accumulate 100 credits by March. You cap at 3 months of your plan's allowance. After that, the oldest unused credits expire.
The SERP frequently cites stale numbers or conflates plan tiers. The figures above reflect LinkedIn's current published plan pages. If you are seeing a different number in your account, check whether your plan was grandfathered at an older tier — LinkedIn has changed allowances several times across plan refreshes.
For a full breakdown of what InMail costs and when it makes sense to spend credits at all, see InMail on LinkedIn: What It Is, What It Costs, When to Skip It.
What is the refund mechanic most users miss, and how do replied InMails come back?
This is the most underused feature in the entire InMail system. When a recipient replies to your InMail within 90 days of you sending it, LinkedIn automatically credits one InMail back to your account. The refund is not instant — it posts after the reply arrives — but it is automatic and requires no action on your part.
The practical implication: your effective monthly allowance is not fixed. It scales with your response rate. A Sales Navigator user sending 50 InMails at a 20% reply rate recovers 10 credits. At 40%, they recover 20. The ceiling is not 50 — it is 50 minus the credits that never come back.
This mechanic also means that optimising message quality is not just a conversion problem. It is a supply problem. Every non-reply is a permanent credit loss. Every reply is a partial refund.
The 90-day window is generous. A prospect who replies six weeks after you sent the message still triggers the refund. What does not trigger it: a prospect who opens the message and ignores it, or one who declines it explicitly.
For a detailed look at what makes InMail messages actually get replies, How to Send a LinkedIn InMail (And Why Most Fail) covers the targeting and copy patterns that move the needle.
What are three ways to extend your monthly allowance without upgrading?
Getting more InMail credits on LinkedIn does not always mean buying more. Three approaches work without touching your plan tier.
Use Open Profiles. Any LinkedIn member who has enabled Open Profile can be messaged for free, regardless of whether you are connected. You spend zero credits. The catch: not everyone enables it, and there is no bulk filter for it in the standard interface. Sales Navigator lets you filter for Open Profiles explicitly — if you have that plan, this filter alone can meaningfully reduce your credit spend on reachable prospects.
Send a connection request first. This is not a workaround — it is a better strategy. A personalised connection request costs nothing. If accepted, it opens a free message thread with no credit involved. InMail should be reserved for prospects you genuinely cannot reach any other way: those outside your network with no shared Groups and no Open Profile. For everyone else, a connection request is both cheaper and, in most cases, better converting because it signals a relationship intent rather than a pitch.
Use shared LinkedIn Groups. If you share a Group with a prospect, you can send them a direct message at no credit cost. This is rarely used deliberately, but if you are active in industry Groups, it creates a free outreach channel to a pre-qualified audience. Joining two or three relevant Groups in your target vertical costs nothing and expands your zero-credit reach.
DSB Intelligence's Recommendations Engine flags this kind of reachability gap early: when it detects that a prospect segment is reachable via Open Profile or shared Groups, it surfaces that before you spend credits on InMail.
How do you read your InMail performance before spending another credit?
Before sending more InMails, check what your current ones are actually doing. LinkedIn provides InMail analytics inside Campaign Manager (for Sponsored InMail) and a basic response rate view inside Sales Navigator. The metric that matters most for the refund mechanic is reply rate, not open rate.
A reply rate below roughly 10-15% is a signal worth investigating before you spend more credits. The problem is almost never volume — it is targeting or message relevance. Sending more credits into a low-reply-rate pattern just accelerates the loss.
Three things to check before your next send:
- Recency of the prospect's activity. A profile that has not posted or engaged in six months is a poor InMail target regardless of title fit. Active users reply more.
- Message length. Shorter InMails — under 400 characters in the opening — tend to get higher reply rates. Long messages read as templates, and prospects treat them accordingly.
- Personalisation signal. A single specific reference to something on the prospect's profile (a recent post, a role change, a shared connection) outperforms generic openers consistently.
LinkedIn's native analytics give you aggregate reply rate. If you want to track reply rate by message variant or by prospect segment over time, you need to pull that data manually or use an analytics layer on top.
For context on how LinkedIn's own content signals affect who sees and engages with your presence, LinkedIn Hashtags in 2026: Do They Still Work? covers the organic visibility side of the equation.
When is InMail the wrong tool entirely?
InMail is a cold outreach tool for people you cannot reach any other way. It is frequently misused as a default channel for people who are already warm.
If a prospect commented on your post last week, an InMail is the wrong move. A direct message after connecting, or even a reply to their comment, is both free and more contextually appropriate. InMail to a warm prospect signals that you did not notice the prior interaction — which is a worse first impression than no outreach at all.
Similarly, if you met someone at an event or on a webinar, a connection request with a personalised note referencing that context will outperform a cold InMail. The connection request is free. The InMail costs a credit and carries none of the contextual warmth.
InMail also underperforms for prospects who are already following your Company Page. They have already opted into your content. A sponsored content touchpoint or a direct message post-connection is a better fit than a credit-costing cold message.
The cases where InMail is genuinely the right tool: senior decision-makers outside your network with no shared Groups, no Open Profile, and no prior engagement with your content. That is a narrower list than most outreach sequences assume.
For more on the mechanics of LinkedIn outreach and when to use which channel, How to Turn Off Profile Views on LinkedIn covers the signalling side of prospecting behaviour. And if you are building a Company Page presence to reduce cold outreach dependency, How to Create a LinkedIn Company Page (And What Comes Next) is the right starting point.
Now what?
- Audit your last 30 days of InMail sends. Check reply rate. If it is below 15%, fix the message before adding credits.
- Filter your prospect list for Open Profiles. Remove them from your InMail queue and message them for free first.
- Set a connection-request-first rule. Default to a personalised connection request for any second-degree prospect. Reserve InMail for those who do not accept within two weeks.
- Track your refund rate. Divide credits recovered by credits sent. That ratio tells you the real cost per conversation, not the nominal cost per send.
Want to track InMail performance alongside your full LinkedIn analytics without switching between five tabs? Start a free trial of DSB Intelligence and get your outreach data in one place.