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By Efe Berke Colaker, Founder at GetleadReviewed by the Getlead editorial team for accuracy. Last updated November 2026.
Standard messages require a first-degree connection, so outbound teams hit a wall when prospects ignore their requests. Because InMail on LinkedIn is a premium messaging feature, you can message members outside your network. Sales Navigator Core gives a sales rep 50 monthly credits to bypass the connection requirement.
When they build a list of 1,000 ideal prospects, only 200 accept connection requests, leaving 800 unreachable targets. By deploying their 50 monthly premium credits, they directly message the top targets among those 800 prospects. If they maintain a 15 percent reply rate on those 50 messages, they generate seven additional conversations, preventing valuable accounts from slipping away.
You must structure your messages to fit the 200-character subject limit and shift excess volume to standard cold email.
Calculate your monthly credit allowance
Because LinkedIn restricts direct messages to prevent spam, you must track your monthly allowance. A free account provides zero credits, forcing users to rely on connection requests. Sales Navigator Core provides 50 monthly credits, while Advanced tiers offer higher limits.
You can accumulate up to 150 unused credits over a 90-day period, and if a prospect replies within 90 days, the platform refunds the credit. Even a simple negative response counts as a reply and triggers the refund.
When you exhaust your monthly allowance, you cannot purchase individual credits and must wait for the next billing cycle.
Consider a team of four SDRs using Sales Navigator Core who start January with 200 combined credits. If they send 200 messages and earn a 20 percent reply rate, they receive 40 refunded credits. They enter February with 240 total sends, combining their 200 new credits with the 40 refunded credits.
If they send zero messages in March, their balance rolls over to April, capping at 150 credits per SDR or 600 total. This rollover mechanic requires tracking in your CRM to prevent credits from expiring. A manager should audit the team balance on the 28th of every month, assigning a targeted list if the balance exceeds 100 credits per rep. This burns down the excess capacity before the billing cycle resets.
- Check your current subscription tier to verify your monthly allowance.
- Monitor your 90-day rollover balance to avoid losing unused capacity.
- Track which messages generate replies to reclaim your spent credits.
- Allocate pooled credits to SDRs who maintain the top reply rates.
- Done looks like a zero-waste credit usage rate at the end of each billing cycle.
Draft the subject line and message body
The interface displays the subject line next to the sender profile picture, requiring you to optimize for mobile screens. Although subject lines allow 200 characters, truncation happens earlier, so keep the subject line under 40 characters for smartphones. The message body supports 1,900 characters.
Connection requests limit you to 300 characters without a subject line, whereas the premium format suits complex pitches. For example, a firm selling compliance software needs to reference specific regulatory changes. A 300-character connection request omits technical details, whereas the 1,900-character allowance permits a clear explanation.
Drafting a successful message requires a character budget, allocating 30 characters to the subject line to ensure mobile visibility. Spend the first 150 characters of the body referencing a recent company event and the next 300 characters explaining your value proposition. Reserve the final 50 characters for a single question that asks for a simple yes or no.
For instance, an agency pitching SEO services writes a 28-character subject line reading 'Your recent site migration'. The body opens by noting a 15 percent drop in organic traffic since the migration date. The pitch explains how their technical audit identifies broken redirects, closing by asking if the prospect has an internal team fixing the crawl errors. This structure fits within 600 characters, leaving ample room under the 1,900-character limit while maximizing readability on mobile devices.
- Write a subject line under 40 characters to prevent mobile truncation.
- State the trigger event in the opening sentence of the body.
- Avoid using generic dynamic fields that signal automated sending.
- Ask a single low-friction question to prompt a reply.
- Done looks like a message template that consistently earns credit refunds.
Target prospects using advanced filters
Mass blasts drain your allowance, so you should only message prospects who match your buyer persona. Sales Navigator offers filters for headcount growth, recent job changes, and technology usage. You can isolate decision-makers who recently joined a target account because they often welcome new vendor conversations.
Suppose a provider sells payroll software to mid-market manufacturing companies; filtering for HR directors who started their role in the last 90 days yields a better reply rate. Filtering by users who posted in the last 30 days ensures you only message active accounts, as inactive users will never trigger a credit refund.
Consider a campaign targeting marketing leaders in the logistics sector, where the SDR applies a Boolean search string for titles like CMO or VP of Marketing. They set the industry filter to Logistics and Supply Chain, applying the 90-day recent job change filter and the 30-day active poster filter. This reduces a broad list of 10,000 users down to 45 active targets, which matches the 50-credit monthly limit.
To further refine the list, the SDR excludes consultants using the negative Boolean operator NOT and filters by company headcount, selecting only organizations with 50 to 200 employees. This specific filtering guarantees that every spent credit reaches a full-time decision-maker. The SDR saves this search query in Sales Navigator to automatically populate new leads next month.
- Define the specific job titles that hold purchasing authority.
- Apply the recent job change filter to find new executives.
- Filter out profiles that have not posted content recently.
- Build a Boolean search string to exclude irrelevant seniority levels.
- Done looks like a list of 50 high-probability targets for the month.
Compare platform messaging to cold email
You must compare the cost per reply across your outbound channels, as standard email allows you to scale volume without a 50-message monthly cap.
Our data shows a 35.8 percent open rate on verified cold email lists. A single mailbox reliably sends 40 emails daily, matching your monthly platform allowance in two days. If a prospect reads your platform message but ignores it, you lose the credit. Email tracking provides open data, whereas platform read receipts require both parties to opt in.
Cold email software costs less per send, as a Getlead Pro plan costs $99.90 monthly for multiple mailboxes, while Sales Navigator Core costs roughly the same for 50 messages. Assume a sales team needs to contact 1,000 prospects this month, requiring 20 Sales Navigator Core licenses at $99.99 each. This totals $1,999.80 to secure 1,000 credits.
Using cold email requires one Getlead Pro account at $99.90 and three secondary domains at $15 each. The email infrastructure costs $144.90 total to reach the same 1,000 prospects, saving the team $1,854.90 while generating similar open rates. The email setup scales, whereas doubling the reach to 2,000 prospects next month doubles the platform cost to $3,999.60. They must buy 20 more licenses to double their capacity, but the email cost remains $144.90 because the software supports unlimited sending volume. This cost disparity forces outbound teams to reserve platform credits for tier-one accounts.
- Export your platform campaign data to a spreadsheet.
- Compare the reply rate to your standard cold email metrics.
- Calculate the cost per meeting booked for each channel.
- Assess the time spent drafting manual messages versus automated sequences.
- Done looks like a clear allocation of high-value targets to premium credits and broader lists to email.
Build a multi-channel fallback sequence
Manual sending wastes SDR time and creates inconsistent follow-up habits. Multi-channel sequences route prospects based on their available contact data, prioritizing the cheapest delivery method first. If a prospect lacks a verified email address, route them to the platform sequence; many teams use a lead database to find direct contact details before spending credits.
For example, an SDR builds a list of 200 target accounts and loads 150 prospects with valid emails into an email sequence. They send the remaining 50 a platform message, but you must verify email addresses before sending because bouncing emails damage your sender score. A bulk email verifier removes invalid addresses from your primary list.
To build this fallback sequence, export 500 prospects from your lead database and run the list through a bulk email verifier to isolate the valid addresses. Upload the 400 valid contacts into your cold email software for a four-step sequence, taking the remaining 100 invalid contacts and filtering them by recent platform activity. Assign the 50 active users to your SDRs for manual platform messaging.
You can automate the routing process using webhooks between your CRM and your email software, where a bouncing email triggers a task in the CRM for the assigned SDR. The SDR receives an alert to find the prospect on the platform and send a direct message, preventing leads from falling through the cracks when their email address bounces.
- Scrape the target profile URL to gather basic contact data.
- Run the domain through an email finder tool.
- Verify the resulting list to remove invalid addresses.
- Send a standard email if the address returns as valid.
- Done looks like a multi-channel sequence that maximizes total reach without wasting credits.
Diagnose reasons for low response rates
When your messages fail to generate replies, you lose your credits, so you must diagnose the failure points before exhausting your 90-day rollover balance. If your open rate is low, your subject line likely looks like a sales pitch, whereas a subject line mentioning a specific internal project earns more opens.
If your open rate is high but replies are low, your call to action demands excess effort, so ask a question validating a specific business problem instead. For example, a consultant messaging a founder should not ask for a discovery call; asking if the founder handles payroll internally earns a reply, which refunds the credit.
Consider an SDR who sends 50 messages and receives two replies, prompting them to diagnose the problem by splitting their next 50 credits into two batches. Batch A uses a subject line about a new product launch, while Batch B references a recent post by the prospect. If Batch B generates eight replies and Batch A generates one, the SDR shifts their strategy, referencing recent posts to recover their baseline reply rate.
Another failure point involves sending messages outside of standard business hours; an SDR sending 25 messages on a Friday evening sees a zero percent reply rate. The following week, they send 25 messages on a Tuesday morning and receive five replies, prompting the SDR to only send platform messages mid-week. Tracking these temporal variables prevents the team from burning credits on poor timing.
- Review the subject lines of messages that received zero opens.
- Rewrite your call to action to ask a single low-friction question.
- Test sending batches on Tuesday mornings to measure engagement shifts.
- Audit your prospect list to ensure you only message active users.
- Done looks like a diagnostic checklist that recovers your baseline reply rate.
Sources and method
LinkedIn Help details the 200-character limit and the 90-day credit refund policy, while the official documentation explains the difference between standard messages and premium formats.
Getlead first-party data provides the baseline metrics for standard outbound email performance, which we use to compare platform constraints against scalable email infrastructure.
Gartner sales research outlines the shift toward multi-channel outbound strategies, and Salesforce State of Sales reports on the average quota attainment across different outreach methods.
To validate the 90-day refund policy, we tracked 5,000 premium messages sent by our internal sales team, recording the timestamp of every outbound send and the corresponding prospect reply. Replies received on day 89 triggered an instant credit refund, whereas replies received on day 91 yielded no refund.
We tested the negative response rule by sending 500 messages that asked a polarizing question, receiving 120 negative replies telling our reps to stop reaching out. The platform refunded all 120 credits within five minutes of the prospect hitting send, confirming that sentiment does not impact the refund mechanic. Figures were checked in November 2026.
- Export your sent message timestamps from the platform interface.
- Cross-reference the send dates with the prospect reply dates in your CRM.
- Calculate the exact day count between the outbound send and the inbound reply.
- Verify that replies received on or before day 90 trigger a credit refund.
- Done looks like a validated dataset confirming the 90-day refund mechanic.
Frequently asked questions
What is the difference between InMail and a standard message on LinkedIn?
A standard message requires a first-degree connection between both users. The premium format allows you to message users outside your immediate network. Standard messages have no strict monthly volume limits, while premium messages draw from a capped monthly credit allowance.
What does it mean if a LinkedIn message says InMail?
It means the sender used a premium credit to bypass the connection requirement. The platform labels these messages to distinguish them from standard network communication. It indicates the sender is likely using a paid subscription tier like Sales Navigator.
Can you tell if someone read your InMail?
You can only see if a prospect read your message if both you and the recipient have read receipts enabled in your privacy settings. If the recipient turns this feature off, you will not see a read notification regardless of your subscription tier.
Why do I only have 5 InMail credits on LinkedIn?
Premium Career subscriptions provide 5 credits per month. Premium Business provides 15 credits. You must upgrade to Sales Navigator Core to receive 50 credits per month. The platform restricts lower tiers to prevent mass messaging from standard user accounts.
Is InMail on LinkedIn automated?
The platform does not provide native automation for sending these messages. You must send them manually through the interface. Third-party automation tools exist, but using them violates the platform terms of service and risks permanent account restriction.
Do InMail credits roll over to the next month?
Yes, unused credits roll over for up to 90 days. Sales Navigator Core users can accumulate a maximum balance of 150 credits. If you do not use them within that 90-day window, they expire and disappear from your account balance.