Many people sigh when they look at bank accounts that keep disappearing even after their paycheck hits—especially when they need to set aside a large sum and don’t know where to put it. People say it’s a low-interest-rate era, but fixed-term deposits are still a smart way to manage assets.

First, it’s worth clarifying exactly what a fixed-term deposit is. It’s a product where you deposit a set amount of money with a bank for a specified period and receive interest on the maturity date. If you withdraw early, you’ll be penalized, but in return you can earn much higher interest than you would with a regular passbook savings account. One advantage is that you can choose a term from 1 month to 5 years, so you can manage it according to your plans.

Many people confuse fixed-term deposits with installment savings, but the difference is clear. A fixed-term deposit is a way of depositing a lump sum all at once from the beginning, while installment savings is a way of saving a fixed amount consistently every month. Installment savings can be started with small amounts, which makes it good for people who are new to saving or early in their careers, whereas fixed-term deposits are suitable for those who want to put already accumulated funds to work efficiently. There’s also a type called a savings deposit, which allows you to deposit and withdraw freely at any time, but you can basically think of its interest as being almost negligible.

Why are fixed-term deposit rates higher? From the bank’s perspective, customers are essentially promising not to withdraw their money for a certain period. That means the bank can use those funds stably to generate returns, so it can offer customers higher interest. On the other hand, savings deposits that can be accessed anytime can’t be used as freely by the bank, so their interest rates are naturally lower.

The most important thing is principal protection. Under Korea’s Deposit Insurance Act, up to a maximum of 100 million won of principal and interest are protected for money deposited with a bank. With the legal amendment in December 2024, the limit was raised from 50 million won to 100 million won, so by today’s standards, you can entrust up to 100 million won with peace of mind. Unlike stocks or funds, fixed-term deposits aren’t affected by market fluctuations, so there’s no risk that your principal will shrink.

So, who should choose a fixed-term deposit? If you’re a short-term investor, you can operate with a relatively short term of about 6 months to 1 year to target quick returns. In particular, using short-term fixed-term deposits is effective when interest rates are rising. Conversely, if you’re a long-term investor, fixed-term deposits with a term of 3 years or more are better. Thanks to the benefits of compounding, the interest grows as time passes, making this the right kind of product for people with goals for the more distant future—such as wedding funds or funds for purchasing a home.

When choosing a fixed-term deposit, there are a few things to check. First, comparing interest rates is essential. You can use the Consumer Portal of the Korea Federation of Banks to compare rates by bank at a glance. Second, you should carefully review preferential interest-rate conditions. You may be able to receive additional interest through items such as salary transfers, credit card usage, or subscribing to installment savings. Third, you must decide the deposit term thoughtfully. Longer terms typically mean higher interest, but if you cancel early you’ll take a loss.

It also helps to know the difference between simple interest and compound interest. Simple interest calculates interest only on the principal, while compound interest adds interest onto interest. For example, if you invest 1 million won at 10% simple interest, you earn 100,000 won each year. With compound interest, it increases—such as earning 100,000 won in the first year and 110,000 won in the second year. Over the long run, compound interest is far more advantageous.

Here are a few tips for managing fixed-term deposits. The “windmill” method involves subscribing to fixed-term deposits every month, then reinvesting the deposits when they mature to steadily grow your assets. This lets you enjoy compound interest while also spacing out your maturity dates, so you can use your funds when you need them. Also, commercial banks sometimes launch special high-interest deposit promotions. These products offer higher rates, but the eligibility conditions may be strict and the sales period may be short—so it’s important to catch the announcement quickly and sign up fast. If you need cash urgently, instead of canceling your fixed-term deposit, taking out a secured loan is another option. Compared with unsecured credit loans, the interest is usually lower and there are no fees.

Ultimately, fixed-term deposits are a really good option for people who want stable returns. However, they’re not suitable for every investor, so you should decide based on your financial situation, goals, and your ability to avoid risk. By understanding the difference between fixed-term deposits and installment savings, comparing bank interest rates and preferential conditions carefully, and choosing a fixed-term deposit product that fits you, you can move one step closer to your financial goals.