US and Canadian fractional share trading benefits from the same commission structures as regular stock trading.
IBKR Lite offers unlimited commission-free trading of U.S. exchange-listed stocks and ETFs. Relevant U.S. Securities and Exchange Commission (SEC) & Financial Industry Regulatory Authority (FINRA) fees may apply.
IBKR Pro offers clients the choice between a fixed rate commission structure and a tiered commission structure for stocks.
For the U.S. fractional shares, IBKR's fixed stock commission rate is USD 0.005 per share with a minimum of USD 1.00 per order and capped at 1% of the trade value plus external fees. IBKR's tiered commission structure begins at USD 0.0035 per share with a minimum of USD 0.35 per order and capped at 1% of the trade value. External fees are passed through to clients trading under the tiered commission model.
| US fractional shares | commission, USD per share | minimum per order, USD |
| fixed rate | 0.005, capped at 1% of trade value | 1.00 |
| tiered rate | begins at 0.0035, capped at 1% of trade value | 0.35 |
For the Canadian fractional shares, IBKR's fixed stock commission rate is CAD 0.01 per share with a minimum of CAD 1.00 per order and capped at 0.5% of the trade value plus external fees. IBKR's tiered commission structure begins at CAD 0.008 per share with a minimum of CAD 1.00 per order and capped at 0.5% of the trade value. External fees are passed through to clients trading under the tiered commission model.
| Canadian fractional shares | commission, CAD per share | minimum per order, CAD |
| fixed rate | 0.01, capped at 0.5% of trade value | 1.00 |
| tiered rate | begins at 0.008, capped at 0.5% of trade value | 1.00 |
Please Note
- Fractional share trades are subject to the same commission rates as whole share trades, with a minimum commission of USD 0.01. For each fractional share trade, you will be charged the greater of 1% of the trade value or USD 0.01.
Examples:
- When buying 50% of a share at a full share price of USD 10.00 (USD 5.00 trade value): Commission = USD 0.05
- When buying 5% of a share at a full share price of USD 15.00 (USD 0.75 trade value): Commission = USD 0.01
- For Canadian stock orders that are immediately executed against an existing bid or offer on the exchange's order book, an exchange liquidity removing fee will be added. See the Tiered North America section for details of the exchange fees.
- Refer to the Commissions page of the IBKR website for complete information on stock commissions in all markets offered for trading.
Additional Information