Cancel Slack Pro step by step
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1
A workspace owner opens the workspace menu → Tools & settings → Billing.
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2
Go to the Plans tab.
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3
Select Change plan → Downgrade to the free plan.
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4
Review the downgrade details and confirm.
Before you cancel
Refunds: Slack credits unused prepaid time as account credit on downgrades (fair billing) rather than refunds.
After cancelling: Message history beyond 90 days becomes hidden (not deleted) on the free plan; apps over the limit are disabled.
Good to know: Slack's 'fair billing' already stops charging for deactivated members — deactivate unused seats before deciding to downgrade the whole plan.
Subscribed through the App Store or Google Play?
Subscriptions billed through Apple or Google can only be cancelled in the store, not on the service's website. iPhone/iPad: Settings → your name → Subscriptions. Android: Play Store → profile icon → Payments & subscriptions → Subscriptions. Deleting the app never cancels the billing.