Remember, you’re also giving up the ability to draw more than one card to your hand. If it is advantageous to double, it’s best to get as much money on the table as possible. That’s not surprising, since doubling for less is never the correct strategy for a player at a regular game. The casino will gladly allow you to “double for less”, by adding an amount less than the original bet in return for drawing only one additional card.
While both of these rules allow a player to increase his wager after the initial cards are dealt, splitting specifically requires the player to match the original bet amount with an equal wager on the second hand, while doubling down has no such restriction. In casino blackjack, the rules for doubling and splitting have one key difference.
