You can increase its interest rate if you make these transactions

Condition	Additional rate	Applied until expiry
More than 500,000 KRW of payroll deposit	0.1 %	Yes
Set your 입출금자유예금 account as card payment account in the bank	0.1 %	No
Set automatic deposit into this account (More than 1 KRW)	0.1 %	No
Completed direct debits (아파트관리비) with 입출금자유예금 account in the bank	0.1 %	No
More than 1 times of online or mobile banking withdrawal or transfer transaction You must use KB스타뱅킹 Application.	0.1 %	No
More than 5 years you have been customer of the bank	0.1 %	Yes
Be a new customer of the bank	0.1 %	Yes
Have opened account '주택청약종합저축' in the bank	0.1 %	Yes
Set a precious day If you open this account, you must mark a precious day within the account period.	0.1 %	Yes
Total (The sum of preferential and basic rates can't exceed the account's maximum interest rate)	0.9 %