The casino's advantage on video blackjack machines is determined in the same manner as on a regular blackjack table.

It all depends on the number of decks used and the rules of the game.

I believe that all of those IGT games use a single deck which is shuffled after every hand.

The big problem is that those games all pay even-money when you get a blackjack, rather than 3-to-2.

That even-money rule alone accounts for about a 2.3% advantage for the casino.

If they hit soft 17, that's another .20%

Allow double down on 10 or 11 only, around .26%

So, the total advantage for the casino is around 3%.

I have an old software program called BJ Advantage by Stanford Wong which can be used to calculate the casino's advantage for any rule and deck variations.

I will try and track that down here in my office and give you a more definite answer. The main problem is that it's so old it's still on a floppy disk and I need to use an older computer.