Kalsarp yog is formed when all seven planets are come between Rahu and Ketu. A complete Kalsarp Yog is formed when exactly half the natal chart is unoccupied by planets. Exclusion of even one single planet outside the Rahu-Ketu Axis does not signify Kalsarp Yog. An individual taking birth in this Kaalsarpyog suffers tensions, fear and insecurity, and has a constant fear from death. This yoga is considered to be more malefic than any other malefic yoga or dosha.

According to Indian astrology, there are twelve different types of Kalsarpa yoga or Kaalsarp Dosh. Kalsarp Dosh due to its negative implications on people's life. Depending on the positioning of Rahu and Ketu, Kal Sarp Dosh or Kalsarp Yog may bring various problems in an individual's life like; delayed marriage, losses in business, lack of self-confidence, financial problems, child problems, family problems, fear of death, legal litigation and accidents to imprisonment. In fact, this condition also prevents some good effects ensuing from the other beneficial planetary positions in the individual’s horoscope. Therefore, most people are dread Kaal Sarp Dosh.

One of the most important aspects of Kaal Sarp Yog is the chanting of Mantra as many times as possible.