Same-type attack bonus

Same-type attack bonus (Japanese: タイプボーナス coincident type bonus), abbreviated STAB, is a 50% damage boost of an attack when it is the same type as one of the types of the using the attack. This results in a 50% increase in damage (100% if the Pokémon has the Ability).

Same-type attack bonus does not apply to moves that do not use the normal damage formula, such as. Contrary to what some early strategy guides stated, attacks can receive the same-type attack bonus.

The same-type attack bonus was introduced in Generation I and has remained unchanged since.

Example of attack bonus
A using  increases the power of the move by 50%, from 90 to 135, since both Blastoise and Surf are. However, a Blastoise using does not receive an increase in special attack power of the move, since Blastoise is not an  Pokémon.

A, on the other hand, would receive the same-type attack bonus when using either Surf or Ice Beam, since Lapras is both Water-type and Ice-type.

If is activated before a move's execution, the user will always receive a same-type attack bonus on every move used, regardless of the move's type.

Variable type moves
A Pokémon only receives the same-type attack bonus on the current type of the move, not its listed type. For example, if the user's type matches their type, they do receive same-type attack bonus; however, since a Normal-type Hidden Power is not possible, a pure Normal-type Pokémon cannot receive the same-type attack bonus for Hidden Power. The same is also true for.

Pokémon GO
In Pokémon GO, STAB boosts damage by 20% (25% prior to June 21, 2017).

In other languages
Typen-Bonus Movimiento STAB Bonus di tipo タイプ一致ボーナス 属性一致加成