An annuity is a formal financial contract issued primarily by life insurance companies designed to mitigate longevity risk—the financial hazard of an individual outliving their accumulated lifetime savings. Under an annuity agreement, an investor (the annuitant) deposits a lump-sum capital amount or executes a systematic series of periodic premium contributions. In return, the issuing financial institution guarantees a predictable, steady stream of periodic income disbursements—disbursed monthly, quarterly, semi-annually, or annually—for a specified time horizon or for the remaining natural lifetime of the annuitant. Annuities represent a foundational element of post-retirement financial security, transforming accumulated wealth into a self-sustaining personal pension.
The life cycle of an annuity is divided into two distinct chronological stages: the Accumulation Phase, during which capital is contributed, invested, and grows on a tax-deferred basis; and the Annuitisation (or Payout) Phase, during which the accumulated principal is systematically disbursed as regular income. Annuities are primarily classified into Immediate Annuities, where regular payouts commence immediately within one payment cycle after a single lump-sum deposit; and Deferred Annuities, where payments begin at a predetermined future retirement milestone. Additionally, contracts offer diverse payout mechanisms: a standard Life Annuity ceases entirely upon the annuitant's death; an Annuity with Return of Purchase Price (ROP) refunds the original principal corpus to designated nominees upon death; a Joint Life Annuity continues paying a surviving spouse; and an Annuity Certain guarantees payouts for a fixed number of years regardless of survival.
In Indian retirement governance, annuities occupy a mandatory statutory position overseen by the Pension Fund Regulatory and Development Authority (PFRDA) and the Insurance Regulatory and Development Authority of India (IRDAI). Under the National Pension System (NPS), upon reaching the superannuation age of sixty, a subscriber is legally mandated to utilize at least forty percent of their accumulated pension wealth to purchase an immediate annuity from an empaneled Annuity Service Provider (ASP), such as Life Insurance Corporation of India (LIC) or private life insurers. The remaining sixty percent may be withdrawn as a tax-free lump sum. While fixed annuities provide absolute income stability, their primary financial drawback is vulnerability to long-term purchasing-power erosion caused by inflation, prompting modern insurers to develop escalating and index-linked annuity options.