How much does the Morocco entry cost?

There is no government fee. No entry fee. Longer stays require a residence permit from the local police prefecture.

How long can I stay with the Morocco entry?

90 days in any 180-day period. The authorization itself is valid: Per visit.

Visa-free entry · Africa

U.S. citizens can enter Morocco visa-free for up to 90 days for tourism or business.

Short answer

Who needs the Morocco entry?

No visa required for visits up to 90 days.

No government fee. No entry fee. Longer stays require a residence permit from the local police prefecture.
Typical processing: Stamped on arrival.
Maximum stay: 90 days in any 180-day period.
Passport validity: At least six months beyond arrival.
When to apply: No advance application required.

e-Visa
Moroccan e-Visa portal (for nationalities that need one)
Open the official form
Consulate
Consulate General of Morocco in the U.S.
Open the official form

1
Fly in with a valid passport
Complete the arrival card handed out on the plane or at the desk.
2
Keep the entry stamp
Hotels and car rentals ask for the police entry number printed on it.
3
Apply to the prefecture for longer stays
Stays past 90 days need a carte de séjour filed locally before the deadline.

Extensions must be requested before day 90 — after that you must apply to the police for an exit clearance.