XP Bonus is a Statistic that increases character's Experience income.

Statistics
Total Item Level Experience Maximum Hit Points
Offensive and Healing Critical Chance Critical Severity Resistance Ignored Recharge Speed Increase Action Point Gain
Defensive Damage Resistance Deflection Chance Deflect Severity Health Regeneration Bonus Incoming Healing Life Steal Chance Life Steal Severity
PvP Damage Resistance Armor Penetration Resistance Critical Strike Resistance Control Resistance
Utility XP Bonus Gold Bonus Glory Bonus Run Speed Bonus