TL;DR: To level up your clan you complete a quest chain through level 5, then bank Clan Reputation Points to reach 6, 7 and 8 (10,000 / 20,000 / 40,000). Each level unlocks new clan skills and a bigger member cap. Max clan level is 8 (140 members, all skills).

Overview

To raise your clan level you complete specific quests and collect Clan Reputation Points. Each new level unlocks clan skills and increases the member cap. The maximum clan level is 8.

Requirements by Level

The early levels run as a quest chain, then the top levels are gated by reputation. Note that requirements can vary by server, so confirm the exact details on the forum.

Clan LevelRequirementMember Cap
1 → 230 members in the clan; your level 20+.10 → up
2 → 3Your level 40+; turn in the required items.grows
3 → 4You must have your 2nd class transfer; collect Proof of Blood.grows
4 → 5Your level 55+; Alliance Manifesto or Proof of Alliance required.grows
5 → 610,000 Clan Reputation Points.grows
6 → 720,000 Clan Reputation Points.grows
7 → 840,000 Clan Reputation Points.up to 140

Each level raises the member cap, scaling from 10 at level 1 to 140 at level 8.

Clan Reputation Points

Clan Reputation Points are your main resource for developing a clan at the higher levels. Here is how to earn them:

SourceReputation
Raid Bosses (RB)100–1,000 per boss, scaling with boss level
Castle siege victoriesLarge reputation reward
Clan questsFixed reputation per quest
Seven Signs participationPeriodic reputation

Reputation is also spent to learn clan skills. You can lose points by losing a castle siege or when members leave the clan, so keep your roster stable and defend your holdings.

Clan Skills are learned by the clan leader using Clan Reputation Points and SP (Skill Points). The higher your clan level, the more powerful the skills you can unlock — at level 8 every clan skill becomes available, including the strongest ones.

SkillEffect
Clan ImperiumIncreases the maximum number of members.
Clan LuckChance to preserve XP on death.
Clan BodyIncreases HP for all members.
Clan SpiritIncreases MP for all members.
Clan ShieldRaises P.Def and M.Def.

Prioritize the roster-wide passives — they affect every member at all times and pay off most in sieges and mass PvP.