For users with at least 80 percent usage on Railway hosted metal instances, all seat costs will be waived as of March 3rd, 2025.

https://docs.railway.com/reference/pricing/plans#subscription-pricing

You can check your metal usage in % under https://railway.com/workspace/usage.

okay, my usage is 100% percent, so even though it's written 40$ I will not be billed for this amount ?

also no included usage is displayed here

I have just asked the team about this. The metal discount will be deducted on your actual invoice, as long as your metal usage is >= 80%.

Yep, we will be implementing something that will accurately show the change in pricing.