Guild Upgrade Chart
Guild LevelFunds requiredDev requiredAdditional requirement
100300,000 coin to establish guild
21,404,00068,400
34,095,000199,500
46,552,000319,200
510,530,000513,400
617,550,000855,400

The item required (Guild Upgrade Medal) for leveling a guild to level 7 and above is not implemented yet.