German phrase
Ab welchem Alter gelten ~?
Meaning
From what age do ___ apply?
When to use it
It asks when a benefit starts. This is polite for checking age-based discounts or similar benefits.
Example dialogue
Ab welchem Alter gelten Seniorenrabatte?
From what age do senior discounts apply?
Seniorenrabatte gelten ab 65 Jahren.
Senior discounts apply from age 65.