Even when your paycheck arrives, it feels like the money doesn't accumulate in your bank account; I think everyone can relate to that. Although we are in a low-interest-rate era, savings accounts are still a good way to build assets. Especially when you have a lump sum of money, you should seriously consider the option of a fixed deposit if you want it to grow safely.

What is a fixed deposit? Simply put, it’s a product where you deposit a certain amount of money into the bank for a fixed period and receive interest at maturity. It’s like lending money to the bank and earning interest in return. The biggest feature of a fixed deposit is that you cannot touch the funds before maturity, but in exchange, you can receive much higher interest rates than a checking or savings account. Usually, you can choose a period from 1 month to 5 years.

It’s different from a savings plan. A savings plan involves regularly saving a fixed amount each month, so you can start with a small amount and develop a savings habit. However, compared to fixed deposits, savings plans tend to offer slightly lower interest. Additionally, a savings account allows withdrawals at any time but offers almost no interest.

To properly understand the concept of a fixed deposit, you need to know why the interest rate is high. From the bank’s perspective, since they receive a promise that the depositor won’t touch the money for a certain period, they can operate the funds stably to generate profits. That’s why they can offer higher interest rates to depositors. Conversely, checking accounts allow money to flow out at any time, so banks have more restrictions on fund management and therefore offer lower interest.

Principal protection is also an important point. According to South Korea’s Deposit Protection Act, up to 50 million won per person in principal and interest is protected. Even if the bank encounters problems, the Korea Deposit Insurance Corporation will pay out that amount, so you can rest assured. For reference, the law will be amended in December 2024 to raise the guarantee limit to 100 million won within the next year.

So, who is a fixed deposit suitable for? Short-term investors can safely grow a lump sum over about 6 months to a year and earn relatively high interest. During periods of rising interest rates, short-term fixed deposits are especially effective. Long-term investors should consider products with maturities of over 3 years, as compound interest gradually increases returns. If you have long-term goals like wedding funds or home purchase funds, a fixed deposit can be a good choice.

When choosing a product, there are a few things to check. First, compare interest rates; it’s essential. You can compare bank rates at the Consumer Portal of the Korea Federation of Banks at a glance. As of May 2026, 1-year fixed deposits offer around 2-3% annual interest, and 3-year deposits range from 2.5% to 3.5%. Next, check the preferential interest rate conditions. There are various conditions like salary transfers, credit card usage, or savings account subscriptions, so find and utilize the ones that are advantageous for you.

Be careful when setting the deposit period. Usually, longer periods yield higher interest, but early withdrawal can cause losses. Also, understand the difference between simple and compound interest. Simple interest is calculated only on the principal, while compound interest accrues on the interest as well, making a bigger difference over time. For long-term investments, compound interest is much more advantageous.

Certain groups such as those aged 65 and over, disabled persons, or independence patriots can enjoy tax exemptions, so take advantage of these benefits.

There are tips for increasing assets with fixed deposits. One method is called the “deposit windmill,” where you subscribe to a fixed deposit with a set amount each month and reinvest the matured deposits. This can leverage the power of compound interest and diversify maturity dates, providing flexible access to funds. Also, commercial banks often offer special high-interest fixed deposit promotions; these products have high rates but may come with strict conditions or short sales periods, so you need to quickly gather information.

If you need quick cash, instead of canceling a fixed deposit, taking out a collateral loan is another option. Fixed deposit collateral loans usually have lower interest rates than unsecured loans and don’t require early withdrawal fees.

Ultimately, a fixed deposit is an ideal product for those seeking stable returns. However, it’s not suitable for everyone, so you should consider your financial situation, goals, and risk tolerance before choosing. By understanding the differences between fixed deposits and savings plans, comparing bank rates and preferential conditions, you can select the best product for your financial goals and achieve your investment objectives more efficiently.