You can go to Inventory > Transfer and transfer gold to an alt. Anything below 10,000 though cannot be retrieved FROM your alt. If you go to transfer money back from your alt to your main, or another character, you can only send the amount above the 10,000 mark (so if you have 42,000, you can only send ~32,000 (FUCK THE TAX SYSTEM)). Also, only high ranking individuals can remove money and "payout" to individuals via the Clan Bank. This is to avoid people randomly joining the clan and draining the bank amount and leaving.