Quote from a529612:
How many contracts are you talking about when you say "enough size"?
Negotiate. Make your case. Regardless of broker.
Listed rates are as follows:
http://www.interactivebrokers.com/en/accounts/fees/commissionStockIndexOptions.php?ib_entity=us
>10,000 contracts/month $0.50/contract.
Trading teenies: $0.50/contract or $0.25/contract.
If you're trading >2,000 contracts/month then best option might be to join a JBO and get access to haircut into the bargain (but with pooled risk downside etc.)
Commissions will likely be in the $0.50-$0.70/contract range at a JBO + monthly platform fees where appropriate.
Good luck.
MoMoney.