Stock trading fees, knowing them properly can change your profits

Many people are surprisingly unaware that focusing solely on returns when investing in stocks can lead to setbacks. The culprit is often the stock trading commission. While it may seem like a small cost, repeated transactions can significantly impact overall profits, and many investors overlook this fact. In this article, we will analyze the nature of stock trading commissions, ways to reduce them, and the differences among securities firms in detail.

Start by Reducing Your Stock Trading Commissions

If you want to secure even a little more investment profit, you must first understand the fee structure accurately. Different securities firms charge varying commissions, and even within the same firm, fees can differ depending on the trading platform and transaction amount.

Check the fee structure first: For Shinhan Investment Corp., transactions under 30 million won incur a commission rate of 0.1391639%, plus a fixed fee of 2,000 won. If you are a frequent short-term trader with small amounts, such fixed fees can eat into your profits considerably. For 100 trades, that fixed fee alone amounts to 150,000 won.

Utilize fee discount events: Most major securities firms offer fee waivers for new and dormant customers for a certain period. If you are just starting to use a securities firm or haven’t traded in a while, it’s wise to take full advantage of these benefits. Some events allow customers to choose when to start benefiting, so applying just before you begin active trading is advantageous.

Manage trading frequency and amounts strategically: It can be more cost-effective to execute larger trades in a single transaction rather than splitting the same amount into multiple trades. Additionally, larger transaction amounts tend to have lower fee rates, so choosing a securities firm based on your trading scale is also a good strategy.

Components of Stock Trading Commissions

Different fee systems apply when trading domestic and international stocks.

Domestic stock trading: Comprises the brokerage commission paid to the securities firm and related agency fees paid to the Korea Exchange, Depository & Settlement Service, etc. Generally, domestic stock commissions are lower than those for overseas stocks.

Overseas stock trading: In addition to brokerage fees, currency exchange fees are incurred. For U.S. stocks, additional fees such as the U.S. Securities and Exchange Commission (SEC) fee and the Financial Industry Regulatory Authority (FINRA) fee are also charged. The standard online trading fee at major securities firms is usually around 0.25%.

2025 Comparison of Stock Trading Commissions by Securities Firm

Fees vary significantly depending on the trading platform. Comparing the commissions of the top 5 securities firms for online trading:

Mirae Asset Securities: Domestic stocks 0.136%, U.S. stocks 0.25%. Offers a 90-day fee waiver for domestic and U.S. stock trades for new/dormant customers.

Korea Investment & Securities: Domestic stocks 0.147%, U.S. stocks 0.25%. Runs a 3-month U.S. stock trading fee waiver event for Banki’s new overseas stock customers.

Samsung Securities: 0.147216% + 1,500 won for transactions under 10 million won; U.S. stocks 0.25%. Waives U.S. stock fees for 3 months for new non-face-to-face account customers.

Kiwoom Securities: Based on the Hero M4 platform, only 0.015%, making it the cheapest. U.S. stocks at 0.25%, with a 3-month fee waiver for new customers.

Shinhan Investment Corp.: 0.1391639% + 2,000 won for transactions under 30 million won; U.S. stocks 0.25%. Offers a full 1-year U.S. stock trading fee waiver for new non-face-to-face account customers.

While domestic stock trading fees vary greatly depending on transaction amount and platform, fees for overseas stocks are generally similar across major securities firms.

The Actual Impact of Commissions on Investment Returns

Let’s look at concrete examples to understand how important trading commissions are. Suppose you make 10 trades of 100,000 won each, earning 10% profit per trade. With a 0.1% fee, the final profit would be about 2.57 million won; with a 0.2% fee, about 2.54 million won. Just a 0.1% difference results in a loss of around 20,000 to 30,000 won.

As trading frequency and investment amounts increase, this difference widens further. Due to compound effects, small differences in fees accumulate over time, significantly affecting long-term returns.

Fixed fees also have a substantial impact. For example, Samsung Securities’ fixed fee of 1,500 won can greatly reduce returns on small, quick trades.

How to Reduce Currency Exchange Fees

When investing in overseas stocks, currency exchange fees are also a key cost. Many securities firms offer less favorable exchange rates than banks. If you plan to invest in foreign currencies like dollars, it’s wise to exchange funds when rates are favorable or to check for preferential exchange rates offered by your securities firm in advance.

Choosing the Right Stock Trading Fee Strategy for You

The best securities firm depends on your investment style. Small, short-term traders benefit from firms with no fixed fees, while investors dealing with large amounts should choose firms with lower fees at higher transaction scales. Also, if you are just starting, consider firms that offer abundant fee benefits for new customers.

Investment returns are not determined solely by stock selection skills. Managing trading commissions is equally important. Careful consideration of securities firm choice and trading strategies can lead to real profit improvements.