Marketplace fee

Description
The Marketplace Fee (tax) is a percentage of currency that is taken out of all items that are sold on Roblox. It is effective on both the Robux and Tickets currency. Roblox is built on an economy, and currencies vary value just like an economy in real life. Think of the Marketplace Fee as a tax on all profit you make in-game. The tax helps support the value of Robux and Tickets.

History
The Marketplace Fee has always been a percentage taken out of the profit that you make on your items. It began with the implication of users being able to make and sell their own Clothing and was established at an amount of 10%. Later, when the Limited Items system came out, the tax for Clothing stayed at 10%, and the tax for Limited Items was established at 25% of your profit.

On July 25, 2012, Roblox changed the Marketplace Fee for all items to a 30% tax. They did this in an attempt to regulate the income that came into the economy, making it easier for users to estimate their income and fluctuations in the Trade Currency system. It also matches the taxes that are established for many other big companies.

Helpful Calculations
When you sell an item, many times you want to know exactly how much profit you are going to make. The Marketplace Fee seems to get in the way of this; unless you use a little bit of basic Algebra to figure out the amount you have to sell the item for to make a certain profit.

The formula for how much profit you make from a sale is described below, where p is the profit and x is the amount you are selling it for:

p = x - .3x

Now, let's say you want to make a profit of 100 Tickets. How much do you sell the item for? To find this out, plug 100 in for p and use Algebra to figure out the value of x.

100 = x - .3x 100 = .7x --1x - .3x = .7x 142.9 = x -- divide both sides by .7 x = 143 --Round to nearest whole number

This means that if you want to make a profit of 100 Tickets, you have to sell the shirt for 143 Tickets.