Quote from mrwoody:
I think it really depends. I use TOS. My commission to buy 1 contract is $1.5.
Assuming the spread is $0.10, I have to pay 10+1.5+1.5=13 for each contract.
If I buy 100 stocks, I will have to pay $5 in commissions (each way) + about .2 cents in spread, which is =$12. This is slightly less, but since options have a much lower margin than stocks, I often take the first choice.
Moreover it is often the case that the spread for options is only .05 so the total cost per contract would be $8.
Quote from deltahedge:
If you're daytrading options (which I suppose is feasible but not something I would really do as you can get killed in slippage) commissions add up fast. You may want to renegotiate that rate and complain that with Optionshouse you can get 5 contracts/5 bucks (hey every penny helps).
Once you start to trade upwards of 10 contracts per position you will definitely want to consider switching to another brokerage firm like Optionshouse where you pay a flat ticket of $8.50 and then .15 per additional contract.
