From what age can someone get a supplementary card?

This varies per provider, but is usually between 16 and 18 years old. Some digital banks such as N26 and Revolut already offer specific youth variants from age 16.

Related questions

• → What is a supplementary card and how do I request one?
• → Who is liable for expenses made with a supplementary card?
• → Does a supplementary card cost extra annual fees?
• → Can I set the spending limit of a supplementary card separately?