The maximum dexterity bonus indicates a cap on the bonus to AC from the dexterity ability modifier as a result of the armor that is being worn. Maximum dexterity bonus does not limit any other benefits from a high dexterity score, such as improved reflex saving throws, bonus to range attack or a bonus to melee attacks with the weapon finesse feat.
- the full bonus to AB for ranged attacks and attacks made with weapon finesse
- the full bonus to Reflex saves.
- the full bonus to skills, although the armor check penalty will reduce some of these skills (Hide, Move Silently, Set Trap, Sleight of Hand and Tumble).
- full damage when using Expose Weakness
The dexterity bonus to armor class is treated as dodge armor class by the game engine. As such, it is of benefit against touch attacks but it is lost if the character is caught flat-footed or is under the effect of feint.
In PnP, Tower shields have a maximum dexterity bonus of 2 and Encumbrance can also affect maximum dexterity bonus. This was not implemented in NWN2. Otherwise, the NWN2 implementation of maximum dexterity bonus is consistent with PnP rules.