Additional considerations.
WHAT CHANGES
You are responsible for maintenance The client may not understand the cost Licences must be held appropriately
THE LICENCE QUESTION
If you buy licences on your own account, the client depends on you indefinitely.
If the relationship ends, they lose updates.
Decide deliberately and state it in your agreement.
WHAT TO TELL CLIENTS
Which plugins are paid What they cost annually What happens if renewals stop
WHAT TO AVOID
Installing plugins the client cannot afford to maintain Leaving a client with a site depending on licences they cannot access
MAINTENANCE
Updates are your responsibility if you agreed to maintain the site.
If you did not, say so clearly. A client assuming you update their site when you do not is a problem waiting to happen.
WHAT TO DOCUMENT AND HAND OVER
The plugin list, licences, renewal dates and access.
WHAT PROTECTS BOTH OF YOU
A written statement of who maintains what.