ING will charge a negative interest rate of 0.5 percent from 1 July for customers with a balance of more than 100,000 euros per account, the bank announced on Friday.
The threshold for the negative interest rate was previously at 250,000 euros.
The rate of 0.01 percent continues to apply to private accounts with a balance of up to 100,000 euros.
ING says it is implementing the change due to the persistently low and negative interest rates in the market.
Customers will receive a personal message about it.
ING emphasizes that this is not a large group of savers.
The bank thinks that nothing will change for nearly 98 percent of customers.
Almost all other large banks also charge a negative interest rate above a certain savings balance, but they usually apply a (still) higher threshold.
For example, customers of ABN AMRO currently only pay from 500,000 euros to save and the negative interest at Rabobank, SNS and ASN Bank starts at 250,000 euros.