When trading on the US sharemarket there are regulatory fees when selling shares and are charge independent of your brokerage costs.

These Sell Side fees are: 

- SEC Fee (sell side only), of $0.231 per $10,000 of sales proceeds, rounded to the nearest cent. 

- FINRA's TAF Fee (sell side only): $0.000119 per share (maximum of $5.95), rounded to the nearest cent.