⇒ Annuity due is an annuity whose payment is to be made immediately at the beginning of each period.
⇒ A common example of an annuity due payment is rent, as the payment is often required upon the start of a new month as opposed to being collected after the benefit of rent has been received for an entire month.
⇒ All payments are in the same amount.
⇒ All payments are made at the same intervals of time