I think it depends on what you are selling. It could be passive income if you are shipping in goods that are quickly marketable. Also, if you are getting orders regularly on a daily basis, you will definitely be making a profit every day, and it could become passive income for you. Some people drop-ship items that are frequently used or needed by people, and if you are lucky enough to have become known as a seller for a particular item, people will always demand it from you, and you can earn a profit. In conclusion, not everyone can earn passive income from drop-shipping.