Saiva Siddhanta situates karma and rebirth within a larger metaphysical vision in which Shiva (Pati), the individual soul (pasu), and the bonds (pasha) coexist eternally. Among these bonds, karma functions as one of the principal impurities (karma-mala) that fetter the soul and keep it revolving in samsara. Every action of body, speech, and mind, performed with attachment and ego, leaves a subtle residue that becomes the “seed” of future experience. These karmic impressions shape the conditions of birth—body, environment, lifespan, and the mixture of pleasure and pain that characterizes a given life. Karma thus operates as a moral causality: meritorious deeds yield pleasant results, demeritorious ones yield suffering, yet both bind so long as they generate further karmic residue. This process is not seen as merely punitive; it serves an educative function, gradually refining the soul and preparing it for higher realization.

The tradition distinguishes three broad forms of karma: the vast accumulated store from past lives (sanchita), the portion currently bearing fruit as the present life (prarabdha), and the new karma being generated now that will ripen in the future (agami or kriyamana). Because this store cannot be exhausted in a single lifetime, the soul transmigrates through many births, carrying its subtle impressions in a subtle body across human, animal, and other possible realms of existence. Birth in a particular family, social situation, or realm reflects the predominance of specific karmic tendencies, and the soul moves through these varied embodiments until its karmic burden is sufficiently worked through. Rebirth, then, is the necessary mechanism by which the soul experiences and exhausts its karma, remaining bound to the cycle of birth and death so long as these bonds persist.

Yet Saiva Siddhanta does not regard karma as an autonomous or blind law; it operates under the governance of Shiva, who determines when and how karmic fruits ripen. This divine administration is portrayed as just and compassionate, ensuring that the soul receives precisely those experiences needed for its maturation. Spiritual effort—devotion, worship, moral discipline, and the pursuit of liberating knowledge—helps prevent the accumulation of new karma and purifies the old. Still, the tradition insists that the exhaustion of karma alone does not suffice for liberation; the deeper impurity that underlies bondage must also be removed. Liberation (moksha) occurs only through Shiva’s grace (arul), which can burn up vast stores of accumulated and future karma, ripen the soul’s understanding, and finally bring the cycle of rebirth to an end. When all karmic bonds are cut and the soul is freed from the necessity of further birth, it abides in union with Shiva in knowledge and bliss, no longer subject to samsaric becoming.