Open the Spotify app or go to https://www.spotify.com
Sign in to your Spotify account
Go to Account settings
Select Subscription (or Manage subscription)
Choose Cancel Premium (or Cancel subscription)
Follow the prompts to confirm cancellation
Check that your plan shows as canceled and note the end date of your billing period
If you subscribed through a third party (Apple App Store / Google Play / carrier), cancel from that provider’s subscription settings instead of Spotify