Tipping is not mandatory in the Philippines but is appreciated for good service. It is customary to tip around 10% of the fare or round up to the nearest convenient amount. However, if you have pre-paid for the airport pickup and airport drop-off service, tipping may not be necessary.
Tipping practices for sea transfers in the Philippines can vary. It is not mandatory to tip the driver, but if you feel satisfied with the service provided, you may choose to give a small tip as a gesture of appreciation.