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Commissions and Fees Compared

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What Are Trading Commissions and How Do They Impact Your Returns?

Trading commissions and fees are the costs you pay to execute trades and maintain your brokerage account. For active traders, these expenses can dramatically erode profits—a trader closing five positions per day at $5 per trade loses $6,250 annually in commissions alone on a 250-trading-day year. Understanding the different fee structures, comparing brokers, and optimizing your trading approach around commission costs is essential to protecting your edge. This article breaks down every fee type you'll encounter and shows you how to evaluate brokers based on total cost of ownership, not just headline rates.

Quick definition: Commission is the fee charged per trade (historically per share or per contract), while fees encompass account minimums, inactivity charges, margin interest, and platform costs. Some brokers charge flat per-trade rates; others charge per-share with minimums; modern brokers increasingly offer commission-free equity trading but charge for options, futures, and other products.

Key takeaways​

  • Commission elimination for stocks — Most major US brokers eliminated equity commissions in 2019-2020; compare their costs on options, futures, and ETFs instead.
  • Options pricing varies widely — Options commissions range from free to $0.65+ per contract; each 10 contracts costs $0–$6.50 across different platforms.
  • Margin interest is a hidden cost — Borrowing costs can reach 6–12% annually and compound across hold periods; factor this into long-holding positions.
  • Account minimums and maintenance fees — Some brokers require $2,000–$25,000 minimum deposits and charge monthly or annual platform fees.
  • Futures and forex fees are separate — These products have their own per-contract or per-pip costs that don't always follow equity pricing.

How Equity Trading Commissions Were Eliminated​

In 2019, Charles Schwab announced zero commissions on stocks and ETFs, triggering a price war. Within weeks, every major broker—including TD Ameritrade, E*TRADE, Fidelity, and Interactive Brokers—matched the offer. Before this shift, traders paid $4.95–$9.99 per stock trade, meaning a 10-trade day cost $50–$100 in commissions before profits could be calculated.

This elimination was driven by retail investors demanding lower costs and the rise of fractional shares, which reduced the need for expensive all-or-nothing trades. Today, buying $100 of Apple stock costs zero in equity commissions at every major broker. However, this "free" trading comes with a catch: brokers make money through margin interest, options premiums, and market-data subscriptions—you're still paying, just in different ways.

Options Commission Structures​

Options trading is where commission differences matter most. Each options contract represents 100 shares, so pricing is quoted per contract. Here's how the major platforms compare:

Interactive Brokers charges $0.65 per contract with a $1 minimum per order. A 5-contract order costs $3.25 ($0.65 × 5); a 1-contract order costs $1. Over 100 trades per month, this adds $65 in costs. TD Ameritrade (now owned by Charles Schwab) charges $0.65 per contract with the same $1 minimum. Tastytrade differentiates itself with flat $0 commissions on options but makes revenue from wide bid-ask spreads on less liquid strikes. Thinkorswim (TD's desktop platform) is included free with a TD account and offers the $0.65 structure.

For a trader executing 20 option trades monthly across 3 contracts each (60 total contracts), Interactive Brokers costs $39, while traditional pricing 15 years ago would have cost $150–$200 on the same volume. Even at modern rates, options remain a significant cost center; a day trader closing 10 five-contract spreads daily faces $325 in daily option fees ($0.65 × 50 × 1 order).

Per-Share Pricing vs. Flat Rate​

Some brokers still use per-share pricing rather than per-contract for options. For example, if a broker charges $0.05 per share on an options order, selling a single call contract (100 shares) costs $5, while selling 10 contracts (1,000 shares) costs $50. This structure incentivizes smaller position sizes and can hurt scalpers and high-frequency traders.

Per-share pricing was historically used to align costs with position size—larger traders paid more. Today, most active trading platforms have abandoned this in favor of per-contract pricing, which is more predictable. When comparing brokers, always ask whether you're quoted per-contract or per-share, and calculate a few sample trades to see the real impact.

Margin Interest Rates and Borrowing Costs​

When you buy on margin—borrowing cash from your broker to increase position size—you pay interest on the borrowed amount. Margin rates typically range from 5% to 12% annually, depending on your account balance and the broker's base lending rate. Interactive Brokers offers competitive rates starting around 4–5%; E*TRADE charges 7–9%; Fidelity ranges from 6–10%.

A $10,000 margin loan held for one week at 8% annualized costs approximately $12 in interest. A $50,000 position held for a month costs around $333. For swing traders holding positions 1–5 days, margin interest may be negligible; for overnight traders holding into the next day, it's a meaningful drag. Always calculate the total cost of a margin trade before entering: commission + margin interest + bid-ask spread should not exceed your expected edge.

Account Minimums and Maintenance Fees​

Account minimums vary from zero to $25,000. Interactive Brokers famously waived minimum deposits around 2020, making it accessible to retail traders with $100. Most brokers with minimums target institutional or high-net-worth clients: Charles Schwab Professional ($25,000 minimum) and E*TRADE Professional ($50,000 minimum) are designed for serious traders willing to pay annual platform fees of $150–$500.

Some brokers charge account maintenance or inactivity fees. Webull charges a monthly $2 account maintenance fee if your account is dormant; some legacy platforms still charge $50–$100 annually for inactive accounts. Always check whether your chosen broker charges these hidden fees, as they can cost $240+ per year on a small account.

Futures and Crypto Trading Fees​

Futures contracts have separate pricing. Interactive Brokers charges $2.00 per round-turn (buy and sell) on ES (E-mini S&P 500 futures), one of the most liquid contracts. A trader executing 10 ES trades daily faces $20 in daily costs. Over 250 trading days, that's $5,000 in commission alone. Some brokers offer lower rates at higher volumes: Td Ameritrade's thinkorswim charges $4.25 per round-turn for ES until you hit 25 contracts per month, then reduces to $3.25.

Forex and crypto fees differ again. Forex is traded over-the-counter with no official exchange fees; brokers profit from wider bid-ask spreads. Crypto commissions range from free (Robinhood, some crypto-native platforms) to 0.1–0.2% per trade (traditional brokers like Coinbase). Evaluate the total cost of entry for each asset class separately, as a cheap equity broker may not offer competitive futures or crypto pricing.

Decision tree​

Real-world Examples​

Scenario 1: Day trader, 20 stock + 5 option trades daily

  • Stock trades: 0 commission (standard)
  • Option trades: 5 contracts × $0.65 = $3.25
  • Daily cost: $3.25
  • Annual cost (250 days): $812.50

Even at modern rates, this trader's options costs are minimal compared to historical rates. Fifteen years ago, the same activity would have cost $150–$250 per day.

Scenario 2: Swing trader, 15 ES futures trades per week

  • ES commission at Interactive Brokers: $2.00 × 2 (round-turn) = $4 per complete trade
  • Weekly cost: 15 trades × $4 = $60
  • Monthly cost: ~$240
  • Annual cost: ~$2,880

At these rates, a swing trader closing 10% of trades at breakeven will actually profit, while 15% at breakeven means a net loss to commissions. Tighter entry and exit planning becomes critical.

Scenario 3: Investor building a position over a month

  • Buying $50,000 worth of stock (zero commission)
  • Holding 30 days at 50% margin (margin interest only)
  • Margin borrowed: $25,000 at 8% annual = $25,000 × 0.08 ÷ 12 = $166.67
  • Total cost to hold: $166.67 (no commissions on shares)

This trader's cost is purely interest-based; stock commissions are irrelevant.

Common Mistakes​

Overlooking margin interest in profitability models. Many traders calculate a trade as profitable without subtracting margin costs, especially on holds longer than a few days. A trade showing $500 profit but carrying $400 in margin interest nets only $100—not the 50% return the trader thought.

Choosing a broker for zero commission then paying $0.65 per option contract. Some traders switch from a pay-per-trade broker to a "free" broker, then realize options are expensive. The "free" broker may actually cost more if you trade options heavily. Calculate your likely option volume and compare per-contract rates.

Ignoring bid-ask spreads as a commission substitute. Brokers with "free" commissions often widen their spreads or quote delayed prices, effectively charging a hidden commission. An options order that should fill at 0.10 bid-ask might fill at 0.15–0.20 on a cheap broker, costing you more than commission would.

Not negotiating rates at higher volumes. Brokers like Interactive Brokers and TD offer volume discounts after 100 or 500 round-turns per month. A trader executing 50 ES contracts monthly should contact the broker to request $1.50 per contract instead of the standard $2.00.

Conflating total fees with trading costs. A broker with a $25,000 minimum and $300 annual fee may be cheaper than a $0 minimum broker if you're making hundreds of trades yearly, because the fee is fixed while commissions scale. Know your likely trade volume and model the total cost, not individual line items.

FAQ​

Are there really any brokers left that charge per-share equity commissions?​

A few niche platforms still use per-share pricing for stocks, and some international brokers charge higher rates, but in the US market, equity commissions at major brokers are zero. However, some platforms charge per-share for options or international stocks. Always verify in the fee schedule.

What's a reasonable margin interest rate?​

4–6% is competitive; 8–10% is standard; above 10% indicates either a boutique lender or poor credit standing. Interactive Brokers, Fidelity, and Charles Schwab typically offer the lowest rates. Rates also vary by account balance—larger accounts get discounts.

Can I avoid margin interest by borrowing from elsewhere?​

Generally no. Brokers do not allow external margin; the margin must come from the broker itself. If margin interest is a dealbreaker, trade only with cash or use leverage products like options instead of buying on margin.

Are options at "zero commission" brokers actually free?​

No. Brokers claiming zero options commissions typically charge per-contract, or they widen bid-ask spreads to compensate. Tastyworks offers $0 per-contract but profits from spreads; most brokers charge $0.50–$0.65 per contract. Always ask for the specific per-contract rate.

How do I compare total trading costs across brokers?​

Calculate a sample month of your likely trades (e.g., 50 stock trades, 20 option trades, 5 margin holds), apply each broker's commission and margin interest rates, and sum the costs. Include bid-ask spreads if you know your typical entry and exit points. This real-world model beats comparing headline rates.

Do currency exchange fees apply to US traders?​

Only if you're trading stocks or options on international exchanges or in foreign currency. US equity, options, and futures markets have no currency fees for USD-based accounts. Forex trading and international stock purchases may include conversion fees (0.1–0.5% on some brokers).

Summary​

Trading commissions have become negligible for equities but remain a significant cost for options, futures, and margin borrowing. Eliminate equity commissions from your broker search; instead, compare per-contract options rates, futures round-turn costs, and margin interest percentages. Factor margin interest into every leveraged trade, and always model total trading costs on your likely monthly volume before opening an account. A trader with a $100 daily options budget should choose a broker with $0.50–$0.65 per contract over a pay-per-share platform; a futures trader closing 50 ES contracts monthly needs a broker offering round-trip rates below $2.50. Accurate cost modeling is one of the easiest ways to improve returns without touching your trading strategy.

Next​

Level 2: Platform Requirements