The SEC and FINRA Trading Activity Fees (TAF) are regulatory fees charged on the sale of any security. These fees are automatically deducted from the proceeds of any sale. They only occur on the sale of a security and are calculated as follows:
The SEC charges $5.10 for every $1,000,000 (or $0.0000051 per dollar).
FINRA charges $119 for every 1,000,000 shares (or $0.000119 per share) sold up to a maximum of $5.95 per trade.
These fees will always be rounded up to the nearest cent and are charged by regulators to help offset the costs associated with regulating the equities market.