user1475: When we buy BTC using USD on MtGox,
Does MtGox charge 0.6% of the USD then do a trade, or does MtGox do a trade first, then charge 0.6% of the BTC we receive?
Similarly, when we sell BTC for USD on MtGox,
Does MtGox charge 0.6% of the BTC then do a trade, or does MtGox do a trade first, then charge 0.6% of the USD we receive?

user4541: The fee is a percentage of whatever you are buying.
Here is their Fee Schedule:
https://mtgox.com/fee-schedule

user441: Mtgox charges the fee from whatever you're buying.
So if you buy 100 btc for however many USD, you'll buy the BTC, then you'll be charged 0.6% of your 100btc as fee.
If you buy 100 USD for however many BTC (i.e., sell some btc), you'll get your USD, and will be charged 0.6% of your 100USD as fee.
Edit: This is actually configurable. If you go to the mtgox settings page in your account, you can set the fee to be taken out either as above (default), or out of your USD balance always.

1475: <p>When we buy BTC using USD on MtGox,</p>

<p>Does MtGox charge 0.6% of the USD then do a trade, or does MtGox do a trade first, then charge 0.6% of the BTC we receive?</p>

<p>Similarly, when we sell BTC for USD on MtGox,</p>

<p>Does MtGox charge 0.6% of the BTC then do a trade, or does MtGox do a trade first, then charge 0.6% of the USD we receive?</p>
 4541: <p>The fee is a percentage of whatever you are buying.
Here is their Fee Schedule:
<a href="https://mtgox.com/fee-schedule" rel="nofollow">https://mtgox.com/fee-schedule</a></p>
 441: <p>Mtgox charges the fee from whatever you're buying.</p>

<p>So if you buy 100 btc for however many USD, you'll buy the BTC, then you'll be charged 0.6% of your 100btc as fee.</p>

<p>If you buy 100 USD for however many BTC (i.e., sell some btc), you'll get your USD, and will be charged 0.6% of your 100USD as fee.</p>

<p>Edit: This is actually configurable. If you go to the mtgox settings page in your account, you can set the fee to be taken out either as above (default), or out of your USD balance always.</p>
