A basic income consists in purchasing power provided at regular intervals, such as a week, a month, a term or a year, depending on the proposal. One can also conceive of a benefit that would have all other features of a basic income but be provided on a one-off basis, for example at the beginning of adult life. This has occasionally been proposed, for example long ago by Thomas Paine (1796) and far more recently by Bruce Ackerman and Anne Alstott (1999). There is a significant difference between a regular basic income and such a basic endowment. Yet, it should not be overstated. Firstly, the basic endowment can be invested to generate an actuarially equivalent annual or monthly income up to the recipient’s death, which would amount to a regular basic income. If left to the insurance market, the level of this annuity would be negatively affected by the length of a person’s life expectancy. Women, for example, would receive a lower annuity than men. However, the advocates of a basic endowment (including Paine and Ackerman and Alstott) usually supplement it with a uniform basic pension from a certain age, which erases most of this difference. Secondly, while other uses can be made of a basic endowment than turning it into an annuity, the resulting difference with a basic income would be essentially annulled if the latter’s recipients could freely borrow against their future basic income stream. Even if one wisely protects basic income against seizure by creditors, the security it provides will make it easier for its beneficiaries to take loans at every stage and will thereby reduce the gap between the ranges of options opened, respectively, by a one-off basic endowment and a regular basic income.