As part of a wider rebranding of the charity, which will attempt to refocus its work on the needs of the "younger older", Age Concern will "push the voices of older people as a political force", said a spokeswoman.
The move, which the charity has been considering for more than a year, follows the decision of RNIB to launch a mass-membership scheme in May.
"There has been a sea change in the voluntary sector; an understanding that the people who you work with need to have a stronger voice in the running of the charity, said the spokeswoman.
Consultation has begun between national body Age Concern England and the Age Concern Federation which represents the 450 local Age Concerns.
The exact voting powers that members will hold has yet to be finalised but there will be some influence over policy.
"The baby boomer generation expects a lot more, said the spokeswoman.