Creating and using a PlayStation Network (PSN) account is completely free on PS4. You need an account to access online features, but there's no subscription fee just to have one.
| Item | Cost |
|---|---|
| PSN Account | Free |
| Online Multiplayer (most paid games) | Requires PlayStation Plus (Paid) |
| Free-to-Play Online (Fortnite, Apex, etc.) | Free (No PS Plus needed) |
| Cloud Saves | Requires PS Plus (Paid) |
| Buying Games/DLC | Per-item cost (Free account needed) |
| PlayStation Store Purchases | Per-item cost |
| PlayStation Plus (Essential/Extra/Premium) | Monthly/quarterly/yearly subscription |
Account = free. Online multiplayer (mostly) = paid. Free-to-play = free online. Everything else is à la carte.