Use a MetroCard and swipe it at the bus farebox
Use OMNY by tapping a contactless credit or debit card, phone, or wearable
Pay exact cash fare only if using cash; no change is given
Use a reduced-fare card if you qualify
Show a valid transfer if you already paid on another bus or subway within the transfer window
Board through the front door and pay as you enter
Keep your payment proof until your trip is complete