An annuity is a financial contract guaranteeing a series of regular payments made at equal intervals over a fixed period of time.

It may also refer to:

Life annuity, an annuity in which the term is a person's lifetime Perpetuity, or perpetual annuity, an annuity from which payments continue indefinitely

See also Annuities under American law Annuities under European law Annuities under Swiss law