Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.
I am using Magento 1.9.3
Tier price is applied on checkout page when customer is not log in but it's not applied when customer is login,
Can not find any solution to fix this.
Login to admin and check product price section:
If you want to apply tier price for all customer then select "ALL GROUPS"
I hope it will resolve your issue.
Required, but never shown