Short description:

Players from the alliance can donate resources in order to unlock various bonuses for all players in the alliance. There are 4 types of bonuses and each of them has 5 unlockable levels that gradually increase the effect of a bonus.

Below you can see what bonuses are available and what their effects are:

• Recruitment: Troop production in all troop-producing buildings is faster.
• Philosophy: Culture points are produced faster. (Townhall celebrations are not affected).
• Metallurgy: Troop values (off and def) are increased on top of their smithy upgrade levels.
• Commerce: Merchants have a larger capacity.

Effects

The effect of each of the bonuses depends on their level:

Level
	Recruitment	Philosophy	Metallurgy	Commerce
Level 0	0 %	0 %	0 %	0 %
Level 1	2 %	4 %	2 %	30 %
Level 2	4 %	8 %	4 %	60 %
Level 3	6 %	12 %	6 %	90 %
Level 4	8 %	16 %	8 %	120 %
Level 5 (max)	10 %	20 %	10 %	150 %

On servers started in 2018 Philosophy bonus was 2% per level and Commerce bonus was 20% per level.

Unlocking bonuses

• Each level requires a different amount of resources to unlock – the higher the level, the higher the amount.
• All 4 bonuses have the same requirements and upgrade times.
• Once players have contributed the required amount of resources, the countdown for unlocking the level starts. The amount and time depends on the level.
• Additionally, there is a limit on how many resources a player can contribute each day, depending on the level of the most developed bonus in the alliance.
• It doesn’t matter which resources are donated. Only the overall amount is calculated, not the resource type.
• Resources can't be contributed when the next level is in the process of unlocking.

The time, limits and required donations to unlock each level are shown in the table below:

For 3 Gold, you can triple your donation. For example, donating 10,000 resources would count as 30,000 – but you still can't go over your donation limit in this way.

Important notes

• The recruitment bonus is multiplied with the corresponding hero items effects (Helmet of Mercenary etc).
• The philosophy bonus counts CP, which is produced only by buildings and hero helmets. Artworks, townhall celebrations and quest rewards do not benefit from the alliance bonus. 
• The bonus from metallurgy is multiplied by the smithy upgrades.
• The commerce bonus is multiplied by the effect of the trade office. Example:
  • Gaul merchant base capacity = 750
  • Capacity with level 3 bonus: 750 * 1.6 = 1,200
  • Capacity with level 3 bonus and level 20 trade office: 750 * 1.6 * 3 = 3,600

Once the bonus is unlocked, it is active for all players in the alliance, with some exceptions for new players: