In 2026, you cannot buy a physical bus ticket from the driver in Sydney, as the entire network is "cashless." The easiest way to pay is by using a contactless credit or debit card (or the digital wallet on your phone/watch). You simply "tap on" at the reader near the bus door when you board and "tap off" when you exit. If you prefer a dedicated card, you can buy an Opal Card at most convenience stores (like 7-Eleven), newsagents, or "Opal machines" at train stations and ferry wharves. The Opal Card is free, but you must load it with a minimum of $10–$20 at the time of purchase. A major benefit of using the Opal system (or contactless) is the Daily and Weekly Fare Caps; once you spend a certain amount in a day (approx. $19) or week ($50), all subsequent travel is free. For tourists, "tapping" your phone is the most seamless method as it applies the same adult-fare discounts and caps as a physical Opal card without the hassle of finding a shop.