Slack Fair Billing Policy: How Inactive User Credits Work (and How to Maximise Them)
Slack's own help page on fair billing is buried and confusing. Here is a simple, independent explanation with worked examples and audit instructions.
How Fair Billing Works
User goes inactive
A user performs no actions in Slack for 28 consecutive days. No messages, no reactions, no app opens, no API calls. The clock starts from their last activity.
Slack stops billing for that user
After 28 days of inactivity, Slack automatically marks the user as inactive and stops charging for their seat. No admin action required.
Prorated credit applied
A prorated credit is applied to your next invoice based on the portion of the billing cycle the user was inactive. Credits are automatic.
If the user returns
When the user performs any action, billing resumes immediately. They get a prorated charge for the remainder of the billing cycle. The 28-day counter resets.
Active vs Inactive vs Deactivated
| Status | Definition | Billing impact |
|---|---|---|
| Active | Any action within the last 28 days | Full billing |
| Inactive | No actions for 28+ consecutive days | Automatic prorated credit |
| Deactivated | Manually removed by admin | Immediate prorated credit from deactivation date |
Credit Calculation Examples
Pro user ($8.75/mo) goes inactive on day 10 of 30-day cycle
Pro user ($8.75/mo) goes inactive on day 25 of 30-day cycle
Business+ user ($12.50/mo) goes inactive on day 1 of 30-day cycle
Business+ user ($12.50/mo) deactivated on day 15
How to Audit Your Workspace
Go to Workspace Settings > Analytics > Members
Sort by 'Last Active' to find users who have not been active recently
Identify users inactive for 28+ days who are still showing as billed
For departed employees: deactivate immediately for instant credit
For seasonal/temporary inactive users: let fair billing handle it automatically
Check the Billing page to verify credits are appearing on your invoices
Maximising Fair Billing Savings
Quarterly audit
Run an inactive user audit every quarter. Most workspaces have 5-15% inactive users at any given time.
Holiday periods
December-January and summer months typically show higher inactivity rates. Credits automatically increase during these periods.
Offboarding process
Deactivate departing employees immediately. Do not wait for the 28-day window. Deactivation gives an instant credit.
Bot and service accounts
Audit whether bot accounts and integrations are occupying paid seats. Some can be converted to app-level tokens instead.
Limitations
Credits only apply forward. No retroactive refunds for past billing periods.
The 28-day window is longer than before. Changed from 14 days in June 2023. This means you wait twice as long for credits to begin.
Any activity resets the counter. Even opening the Slack app on mobile (even accidentally) counts as activity and resets the 28-day clock.
Annual plans handle credits differently. Credits reduce the effective per-user rate rather than providing direct cash back.
Frequently Asked Questions
How long does a user need to be inactive for fair billing to apply?
A user must be inactive for 28 consecutive days. Any activity within the 28-day window (sending a message, clicking a reaction, opening the app) resets the counter. This was changed from 14 days in June 2023, making the policy less generous. Inactive means zero interactions of any kind with Slack.
How is the fair billing credit calculated?
Credits are prorated based on when in the billing cycle the user becomes inactive. If a Pro user ($8.75/month) goes inactive on day 10 of a 30-day billing cycle, the credit is $8.75 x (20/30) = $5.83. Credits are applied automatically as a discount on your next invoice. They cannot be refunded in cash or applied retroactively to past invoices.
Does fair billing work on all Slack plans?
Fair billing applies to all paid plans: Pro, Business+, and Enterprise Grid. It does not apply to the free plan (which is already free). On annual billing, credits reduce the effective per-user rate rather than providing direct cash refunds. The policy works identically across all paid tiers.
What is the difference between inactive and deactivated users?
Inactive users are still members of the workspace but have not performed any action in 28+ days. They receive automatic credits. Deactivated users have been manually removed from the workspace by an admin. Deactivation provides an immediate prorated credit from the deactivation date. Deactivation is permanent for that billing cycle, while inactive users can return at any time.
Can I get retroactive fair billing credits?
No. Fair billing credits only apply forward from the date the user becomes inactive (after the 28-day window). There are no retroactive credits for past billing periods. This is why regular auditing is important: the sooner you identify and deactivate truly departed users, the sooner credits begin.