Skill Mastery

Skill mastery is achieved by reaching level 99 in any skill. Level 99 is achieved by reaching 13,034,431 experience points in a skill with the exception being Invention (36,073,511 experience to reach skill mastery). Level 99 is the maximum level in most skills. Dungeoneering, Invention, and Slayer are the only skills with a maximum level of 120 (referred to as true skill mastery), achieved at 104,273,167 experience points for Dungeoneering and 80,618,654 for Invention. The current maximum total level is 2496.(level 99 in all skills and level 120 in Dungeoneering, Invention, and Slayer). When level 99 is reached in any skill, there is a different fireworks animation that can be heard by everyone nearby.

Pay-to-play players reaching level 99 in a skill are entitled to wear a Cape of Accomplishment for that particular skill. This cape is bought from a specific skill master for 99,000 coins. Every Cape of Accomplishment gives access to a unique emote. Furthermore, it can be used to boost the corresponding skill's level to 100 for a short time. Every Cape of Accomplishment has its own unique perk, some of them can be activated by right-clicking on the cape, others are passive. If the player reaches level 99 in more than one skill, the player's skill cape becomes trimmed and any more skill capes the player obtains will also become trimmed along with the newly received cape.

Before the Skill interface update, players with a level 99 skill could view the experience needed to earn level 100. With the virtual levels update, players could once again view the experience needed, all the way to level 120.

In RuneScape Classic, the maximum total level was 1,782. With the addition of Runecrafting (1,881), Slayer(1,980), Farming (2,079), Construction (2,178), Hunter (2,277), Summoning (2,376), Dungeoneering (2,496), Divination (2,595), Invention (2,715), and the increase of Slayer from level 99 to 120, the maximum total level is now 2,736.