Key Takeaways
- $0 commissions does NOT mean free trading — FX fees can cost 10x more than the commission savings
- For international investors, the FX conversion fee is typically the biggest hidden cost
- Options traders must check per-contract fees, not just the base commission
- Platform and data fees can add $15–$30/month on premium platforms
- Always calculate the total annual cost, not just the per-trade fee
- This is educational content only
Not all broker fees are obvious. While many platforms advertise '$0 commissions' in large font, the real cost of trading can be hidden in foreign exchange fees, options contract fees, inactivity fees, and data subscription costs. This guide breaks down every fee you might encounter — and shows you how to calculate your true total trading cost.
01. Trading Commissions
A trading commission is the fee you pay each time you buy or sell a stock, ETF, or other security. Over the past decade, most modern brokers have eliminated commissions entirely for US stock and ETF trades.
Commission-free brokers (stocks): Moomoo, Webull, Robinhood, Wealthsimple Trade, Tiger Brokers.
Commission-charging brokers: IBKR Pro starts at $0.0005/share (minimum $1/trade). Questrade charges $4.95–$9.95 per stock trade (ETF buys are free). Charles Schwab charges $0 for online US stock/ETF trades.
Even at '$0 commissions', brokers make money through payment for order flow (PFOF), which means your orders may be routed to market makers who pay the broker for your order — potentially resulting in slightly worse execution prices. IBKR does not use PFOF.
02. Foreign Exchange (FX) Conversion Fee
This is the most important fee for international investors and is almost always underestimated. When you deposit funds in CAD, SGD, MYR, AUD, or another non-USD currency, the broker converts your deposit to USD before you can buy US-listed securities. This conversion costs money.
The FX fee is usually expressed as a percentage of the converted amount or as basis points (bps). 1 basis point = 0.01%.
FX fee comparison across major brokers
IBKR: 0.2 bps (0.002%) — industry's lowest, via IBKR's smart currency conversion. On a $10,000 conversion: ~$0.20.
Moomoo Canada: ~1.5% (150 bps) — on a $10,000 conversion: ~$150.
Questrade: 1.5% — similar to Moomoo Canada.
Wealthsimple Trade: ~1.5% for CAD→USD, but Canadian ETFs can be bought in CAD without conversion.
Tiger Brokers Singapore: ~1.5% SGD→USD but varies.
At 1.5% FX fee, a $10,000 annual investment costs $150 just in FX — that's $1,500 over a decade, not counting compound growth lost.
03. Options Contract Fees
| Broker | Base Commission | Per Contract Fee | Notes |
|---|---|---|---|
| Robinhood | $0 | $0/contract | No per-contract fee, but limited tools |
| Moomoo | $0 | $0.50/contract | Free Level 2 data included |
| Webull | $0 | $0.55/contract | Advanced charting |
| IBKR Pro | $0 | $0.15–$0.65/contract | Volume-based discounts, lowest for heavy traders |
| Tiger Brokers | $0 | $0.65/contract | Good for APAC-based options traders |
| Saxo | 0.12% | Min $1.25/contract | Higher cost, global market access |
04. Platform and Market Data Fees
- Level 2 (order book) data: Free on Moomoo, Webull. $1.50–$15/month on IBKR (varies by exchange). Important for active traders to see real bid/ask depths.
- Advanced charting: Free on Moomoo, Webull. TradingView integration available on some platforms.
- Real-time quotes: Free on most platforms. Delayed quotes (15 min) are the default on some.
- IBKR Pro market data bundles: US market data can cost $1.50–$16/month depending on what you subscribe to. IBKR Lite users get some free data.
- Saxo SaxoTraderGO and SaxoTraderPRO: The platform is free but spreads are wider for basic accounts.
- Platform subscription: Most brokers charge $0 for the standard platform. Premium features (e.g., Moomoo's Level 2 options) may require a paid plan.
05. Margin Interest Rates
If you trade on margin (borrowing money from your broker), you pay interest on the borrowed amount daily. Margin rates vary significantly between brokers.
IBKR has historically offered the lowest margin rates among retail brokers — roughly 5.83% USD as of mid-2026 for their benchmark rate. This compares to 9–12% at many other retail brokers.
Most beginners should avoid margin trading entirely. Borrowing amplifies both gains and losses and carries real risk of loss exceeding your initial deposit.
06. Other Fees to Watch Out For
| Fee | Typical Amount | How to Avoid |
|---|---|---|
| Inactivity fee | $0–$10/month | Make at least 1 trade per quarter, or choose a broker with no inactivity fee |
| Wire transfer fee | $15–$25 per wire | Use local bank transfers (PayNow, Interac, FPX) which are often free |
| Paper stock fee | $20–$50 per certificate | Keep shares in electronic form (avoid requesting physical certificates) |
| Account transfer (ACAT) fee | $50–$75 per transfer | Only incurred when transferring to another broker |
| Dividend reinvestment | Usually free | Most brokers offer DRIP at no charge |
| ECN/SEC fee | Fractions of a cent/share | Regulatory fee on sells — too small to worry about |
07. How to Calculate Your True Annual Trading Cost
- 1Estimate your annual trading volume (e.g., 12 stock trades per year = monthly investing)
- 2Multiply by commission: 12 trades × $0 = $0 (for a commission-free broker)
- 3Calculate your annual FX conversion: If you invest $1,000/month in CAD from Canada → $12,000 CAD converted to USD. At 1.5% FX fee: $180/year in FX alone.
- 4Add any platform or data fees: e.g., $15/month × 12 = $180/year
- 5Add margin interest if you borrow: varies by amount and rate
- 6Total annual cost = Commission + FX fees + Platform fees + Margin interest
- 7Compare this total — not just the advertised commission rate — across brokers
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Frequently Asked Questions
Educational purposes only. This guide is for informational purposes only and does not constitute investment advice, financial advice, or a recommendation to buy or sell any security or financial product. Trading and investing involve risk, including the potential loss of principal. Always verify information with the official broker website and consult applicable local regulations before opening an account.
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