As with most European and North American countries, tipping is graciously accepted in Egypt. A 10% tip at restaurants and to guides and drivers is standard. Unfortunately, at major tourist sites like the Pyramids of Giza or the tombs of the Valley of the Kings, touts aggressively hustle for tips by allowing you to take photos in areas where it’s clearly posted as prohibited (such as inside the tombs). Please refrain from perpetuating this problem by not paying to take pictures.