The Mahadasha of Rahu in a person's horoscope is for 18 years. Along with the Mahadasha of Rahu, the Antardasha of all the nine planets come in turn and have different effects on our lives. It is said that the houses which are aspected by Rahu are suffering from the Mahadasha of Rahu. Rahu's uncertainty remains in both profit and loss matters. Just like rain-fed farming. There can be a bumper crop and the entire crop can also be soil. As a result of the hopes given by Rahu, after small successes, the person gets stuck even worse.