The economic system referred to the transactions and trade that individuals partook in. To do this, money could be earned to purchase weapons and equipment from merchants by fulfilling assassination contracts, pickpocketing, hiring thieves, looting treasure chests, or other more legitimate means.
The following represented the major currency of the region, during their respective time periods:
- Florins in Renaissance Italy.
- Akçe in the Ottoman Empire.
- Reales during the Golden Age of Piracy.
- Pounds sterling in Colonial America. People also paid with Spanish, French, and Portuguese coins, wampum, or colony-specific bills, but it was simplified to just pounds sterling in the Animus 3.0.
- Écu in Colonial Louisiana.
Banks were an essential part of everyday Renaissance life. Ezio Auditore da Firenze came from a family of bankers, and by investing in renovating Monteriggioni, he and his sister Claudia received a share of the profits. Ezio used the money to pay for the following:
- Services offered by blacksmiths, doctors and tailors
- Hiring mercenaries, courtesans and thieves
- Bribing heralds
- Buying paintings - improving the value of the Villa Auditore - and maps from art merchants to find treasure chests
- Lessons from mercenaries on how to use long weapons, two-handed weapons and throwing knives
- Caravan travel
Thieves would also attempt to rob Ezio; in the event that money had been stolen from him, Ezio could tackle or kill the thief to get it back.
He could also find exotic items in chests around the city to trade for special upgrades from the stores in Tiber Island, and repurchase the inventions of Altaïr Ibn-La'Ahad's Codex from Leonardo da Vinci. Upon restoring the city of Rome completely, Ezio was reunited with the Auditore cape for his efforts.
When Ezio arrived in Constantinople, many shops were closed after the Byzantines had captured the Assassin Dens and the surrounding area. By recapturing a Den, Ezio could reopen the shops, banks and faction buildings, and they would remain open even if the Templars reoccupied a Den. However, should the Templars ever do so, there would be an additional 15% tax cost on all items that could be bought.
Ezio could then use the money earned by his share in Constantinople's shops to renovate other cities reclaimed from the Templars, increasing his daily payment of akçe. He could also increase his revenue by purchasing items from book shops, improving the value of the library in Galata headquarters. During his time in the city, he learned to use bombs and began buying them from black market dealers, and received ingredients from his apprentices in other cities, once they had surveyed the region for the Master Assassin Piri Reis.
The economy of the American colonies in the 18th century were based around the crafting and trading of goods. Ratonhnhaké:ton (known also as Connor) and Aveline de Grandpré earned money by arranging the transportation of materials and goods; for Connor, many goods were hunted or bought from the residents on the Davenport Homestead, while Aveline could purchase and resell materials via her family's shipping business.
Profits made through land or naval convoys were determined by where and which merchant or port they traded with, with naval convoys earning more than than those sent to Boston, New York or the Frontier via land routes.
Lance O'Donnell could craft a total of three land convoys, with a maximum capacity of eight items to trade per convoy, and three naval convoys with a maximum capacity of fifteen tradeable items. Liberating forts and undertaking privateer contracts in the Aquila made the trade routes safer, lowering the risk percentage as well as lowering taxes.
For example, the risk of a naval convoy being attacked dropped from 80% to 5% after the Aquila had cleared the route. In the event of the convoy being attacked while on the road, Connor would be notified that it was in danger, and had to defend it himself or send his recruits to do so, otherwise the profits would be lost. There was nothing that could be done if a naval convoy was lost at sea however.
Unlike Renaissance Italy, general stores provided all the items Connor needed. He could make money by selling them his hunting spoils, the value and quantity of which depended on how the animal was killed.
Game slain by a single strike of an arrow, poison darts or the Hidden Blade was worth more than spoils slashed or shot by a weapon multiple times, such as firearms, trip mines, and rope darts, which ruined pelts and skins. The Aquila could also be upgraded with purchases made from harbormasters, making the vessel a more formidable force for Connor during privateer contracts.
- While conventional trade was unavailable in Assassin's Creed: Bloodlines, upgrades for Altaïr Ibn-La'Ahad could be purchased by finding Templar coins.