Money in multiplayer is shared and thus it does not matter who picks up the gold, everyone will receive the same amount money. However, when someone has %gold gain multipliers, the gold gained between different players may be different. For example, Player 1 with a %gold multiplier of 100% (default) picks up 100G -> 100G will show up in their personal coffers. Player 2 with a %gold multiplier of 120% will instead receive 120G in their coffers. It does not matter who picks up the gold, gold gained will go through these personalized %gold gain multipliers to determine actual amount added to one's personal coffers.
All %gold gain multipliers in the gain are additive and are listed below...
Thief Passive Gold Fever: 50% or 100%
Thief Class Title: 0%-55%+
Cloak of Many Pockets (Uncommon Item): 25%
Tax is calculated by the amount you have in town and on hand. However, the tax rate is reduced upon purchase of treasury upgrades found in your town hall. In multiplayer, tax rates are calculated individually based on each player's individual Treasury level. The host’s treasury level is NOT shared.
Example: for level 1 treasury, you will be taxed at 50% for 10000G. Level 2 treasury = 50% tax at 15000G, level 3 treasury = 50% tax at 20000G, etc.
If you defeat the final boss, your gold and ore will be sent back to town, automatically, like a normal deposit (i.e. you are still taxed).
Money Pickup Base Values