Are there any hidden costs?

There are NO hidden fees.

Please be noted, that if you're renting a dedicated server, you should check up with your account manager on actual traffic overage prices for selected location.

Billing and Payments Share:
Read also
Fedora: Unable to resolve IP
How to reset password to HostZealot account?
Related Articles
How to cancel my current hosting service? How long does it take for payment to go through? How to change billing cycle for active service? My payment is overdue, what should I do? What payment methods do you accept? Do you provide refunds on your services?