Remove the tea bags from the box and tie them together, then clip the paper tags off.
Add the chai tea bags and water to a medium saucepan, and bring to a simmer. Once simmering, allow to simmer for 15 minutes. Remove from heat and remove the tea bags, allowing the tea to drip out of them before discarding them.
Stir the sugar and vanilla extract into the chai concentrate, and keeping stirring until the sugar is dissolved. Allow the concentrate to cool at room temperature for 15 minutes, then transfer to a mason jar or container and refrigerate for up to 7 days.