When something is expensive because it is insta-worthy or aesthetically pleasing.
That corgi-shaped macaron is expensive because it's got instagram tax.
by L'aimethyst July 14, 2018
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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.
by Yumko July 15, 2018
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