Many brokers charge a fixed commission plus a per-contract fee for options trades. This could be something like $5.95 + $1.00 per contract (so, the total fee on a 10-lot trade would be $5.95 + $10 = $15.95). The exact commission structure will vary based on your broker and the level of trading that you do with them. For example, E•TRADE charges $0.65 per contract but reduces it to $0.50 per contract for accounts with more than 30 trades in a month.