A fork of Rural Dictionary
When something is expensive because it is insta-worthy or aesthetically pleasing.
That corgi-shaped macaron is expensive because it's got instagram tax.
An incentive of a price that stems from something becoming popular on Instagram and therefore becoming more wanted, supply and demand kicking in, and the price rising.
Miha: My bakery's bliss rainbow sour sugar has become really popular on instagram, so I raised the cost. Lori: Like instagram tax? Miha: Yeah.