premium

having or reflecting superior quality or value

premium gasoline at a premium price

payment or reward (especially from a government) for acts such as catching criminals or killing predatory animals or enlisting in the military

a prize, bonus, or award given as an inducement to purchase products, enter competitions initiated by business interests, etc.

they encouraged customers with a premium for loyal patronage

payment for insurance

a fee charged for exchanging currencies

the amount that something in scarce supply is valued above its nominal value

they paid a premium for access to water