Options are quoted on a per-share basis . For example, if a premium is quoted at $1.25 , the cost to buy one contract is $125 ($1.25 x 100 shares) .
The cost of buying an option is not a single fixed price but a combination of the (the market price of the contract) and brokerage fees . Total Cost Breakdown
The total upfront investment for a standard stock option contract is calculated by multiplying the quoted premium by the contract multiplier (typically 100 shares) and adding any per-contract fees.