Low Cost & Lowest Margin Fees. Rated Lowest Margin Fees 1 by StockBrokers.com. Each firm's information reflects the standard online margin loan rates obtained from their respective websites. Competitor rates and offers subject to change without notice. Before trading security futures, read the Security Futures Risk Disclosure Statement. The commission plan you choose (TS SELECT, TS GO, Per Share, etc.) applies to both stock and options trading in that account. Please visit Market Data, Stocks & ETFs Margin Interest Rates, Service Fees, and Equities Pricing Disclosures, Options Pricing Disclosures, Futures Pricing Disclosures for additional information. *Free real-time data Margin Rates. Margin interest rates vary due to the base rate and the size of the debit balance. When setting base rates, TD Ameritrade considers indicators like commercially recognized interest rates, industry conditions related to credit, the availability of liquidity in the marketplace, and general market conditions.