The first known currency in Lucus Augusti is the "caetra", coined possibly in the Lugo area between 25-23 BC to support the expense of the Roman wars against Cantabri and Astures.

After the foundation of the city, Lucus integrates completely the Roman coinage system. In the first decades of its existence coinage originally from the coining centres of the Valley of Ebro (Celsa, Calagurris, Turiaso …) is widely used. During this period the coins in highest circulation werethe asses (bronze), followed by denarii (silver) and dupondios (bronze) and less frequent, the aureus. Among the coins with the lowest value in circulation is the sestertius, a brass coin equivalent to four asses. Under the monetary reforms of Emperor Diocletian (294 A.D.) he attempts to bring order to the monetary crisis, creating new coins such as antoninianus, equivalent to half a denarii, made in bronze with a silver plate.

At the beginning of the Fourth Century there are inflationary pressures and the currency of that period such as the follis (bronze), suffer continuous devaluations. In the last third of the Fourth Century and beginning of the Fifth Century a large quantity of small treasures or coin deposits are hidden as a consequence of the insecurity caused by the invasions.