October 22, 2026

Beware of Automatic Renewal of Time Deposits! Key Points on Maturity and Renewal to Check in an Era of Rising Interest Rates

Are you leaving your time deposits untouched? Now that interest rates are rising, it is important to check your automatic renewal settings and maturity dates. We have summarized the differences between principal-plus-interest renewal and principal-only renewal, as well as points to keep in mind when renewing, in an easy-to-understand way.

There are various time deposit products available depending on the bank, ranging from short-term to medium-term and long-term.

Now that interest rates are rising, how much your money grows depends on where you keep it.

Previously, interest was negligible no matter where you deposited your money.

However, the situation has changed significantly over the past few years.

“I’ll think about it again when it matures.”

Even if you think that way, it may be automatically renewed without you knowing.

Especially for long-term time deposits such as 3 or 5 years, it is easy to even forget the maturity date.

I think I would have left it as it was even after it matured if it were in the past.

However, in a world where interest rates exist, a small difference can lead to a large gap after a few years.

This time, I looked into the mechanism of automatic renewal for time deposits and points to consider when reviewing them.

What is a time deposit?

A time deposit is a deposit product where you deposit money for a fixed period and receive interest.
Deposit terms include 1 month, 6 months, 1 year, 3 years, 5 years, etc., and the available terms vary depending on the bank and product.

Although higher interest rates are sometimes set compared to ordinary deposits, it is basically premised on leaving the money until maturity.
If you cancel midway, the interest rate may be lower than originally planned, so it is best to use money you do not plan to spend.

What is automatic renewal for time deposits?

Automatic renewal is a mechanism where a time deposit that has reached maturity is automatically renewed as a new time deposit.

The following two types are representative.

1. Principal-plus-interest renewal

This is a method of adding the interest at maturity to the principal and continuing it as a new time deposit.

Since you can manage the principal and interest together, you can expect a compound interest effect where interest also earns interest.

2. Principal Renewal

This is a method where only the principal is automatically renewed, and the interest at maturity is received in a designated savings account or similar.
This may be convenient for those who want to use the interest for living expenses.

Note that there is also a method called “automatic cancellation,” where both the principal and interest are returned to your savings account at maturity.

Since names and handling conditions vary by bank, you should check your own contract details.

Features and Precautions of Automatic Renewal

1. Check the interest rate at the time of renewal

This is particularly important.
With general fixed-rate time deposits, the deposit is renewed at the applicable interest rate at that time upon automatic renewal.

In other words, the old low interest rate is not guaranteed to continue.
However, even if there are products with higher interest rates at other banks, your money will not be automatically transferred to them.

It is important to compare and see if the interest rate after renewal is truly right for you.

2. Beware of campaign interest rates

Special interest rates, such as those limited to new deposits, are not necessarily applied after automatic renewal.
Even if the interest rate is high at first, it may revert to the standard rate upon renewal.

You should check not only the interest rate but also the application conditions and duration.

3. Check the maturity date and renewal period

While automatic renewal is convenient, its drawback is that it is easy to forget about the maturity date.
Money you intended to deposit for one year might end up being locked in a time deposit for another year.

Also, if you cancel mid-term after renewal, a lower mid-term cancellation interest rate may be applied than usual.

You should make sure you are able to decide whether or not to renew before the maturity date.

How much does interest change with different interest rates?

For example, if you deposit 1 million yen for one year:

Annual Interest Rate | 1-Year Interest | 0.2% | 2,000 yen | 0.5% | 5,000 yen | 1.0% | 10,000 yen

*This is a simple calculation before taxes.

Even with the same 1 million yen, there is an 8,000 yen difference per year between 0.2% and 1.0%.

As the amount deposited increases, that difference grows even larger.

That is why I believe it is worth comparing interest rates at the time of maturity, rather than assuming that automatic renewal is safe.

Points to consider when reviewing your time deposits

Here are the five things you should check:

The current interest rate of your time deposit
The maturity date and automatic renewal settings
Whether it is principal-and-interest renewal or principal-only renewal
The interest rate applied after renewal
Interest rates at other banks and early withdrawal conditions

Recently, more banks allow you to check your time deposit details via smartphone or computer.

If you register the maturity date on your calendar, it will be harder to forget.

However, you should avoid prioritizing interest rates so much that you deposit money needed for daily living.

Summary

From now on, I think it will become important not just to deposit money, but to manage it periodically as well.

Automatic renewal is a convenient system.

It saves you the trouble of going to the bank, and it automatically renews your funds into the next time deposit upon maturity.

But leaving everything to that convenience might be a bit of a waste.
As interest rates rise, products with better terms may appear.

Of course, there is no need to chase after interest rates alone.

The important thing is to understand where your money is and under what conditions it is being deposited I believe.

We are moving from an era where you could just deposit your money and leave it alone, to an era where you need to review and manage it from time to time.
For the sake of your future self, it is worth taking the time to check these details rather than avoiding the hassle.