How much Robux does it cost to upload an item in roblox?

You need 750 robux to upload your design and an additional fee to publish it. The publishing advance(fee) varies depending on item types.

Asset type	Non-limited publishing advance	Paid limited publishing advance
Hat	1500	13000
Face	1500	13000
Hair	1000	6000
Neck	1000	15000
Shoulder	1000	15000
Front	1000	15000
Back	1000	15000
Waist	1000	15000
Jacket	600	5000
T-Shirt	600	5000
Shirt	600	5000
Sweater	600	5000
Pants	600	5000
Dress/Skirt	600	5000
Shorts	600	5000
Body	2500	20000
Head	1500	10000

Also, You don't need Roblox Premium to upload your creation to Roblox, but you need Roblox Premium 1000/2200 to publish it.