How much does a database-only Supabase project cost?

Nothing, if it fits in the Free plan. A Free project gets a 500 MB database on shared CPU with 500 MB of RAM, and you can have 2 active Free projects. The catch is that Free projects pause after a week of low activity.

On the Pro plan, one database-only project costs $25 a month before any extra usage. That includes $10 a month in compute credits, which covers a project on Micro compute (1 GB of RAM), along with 8 GB of disk, 250 GB of egress, daily backups kept for 7 days, and email support. Pro projects don’t pause.

The bill grows in a few predictable ways. Each extra project runs on its own compute instance, billed by the hour. Larger compute sizes cost more. Disk space past the limit is charged per extra GB, and add-ons like Point-in-Time Recovery are priced separately.

The pricing page has the current numbers, and Compute and disk lists every compute size.