The dealer in Blackjack has a slight advantage over the players mainly due to the fact that the dealer acts last. This means players can bust before the dealer even plays their hand, which gives the dealer a "last-mover" edge. Additionally, the dealer’s actions are determined by fixed rules, while players have more strategic freedom, which can lead to greater variation in player performance. Overall, the house has a small built-in edge (typically 0.5% to 1%), even when players use optimal strategies, because of these rule-based dynamics and the fact that dealer blackjacks are often paid at a standard rate rather than the higher 3:2 payout for a player's blackjack.