About one-third of eligible retirees applied to take their money out of KiwiSaver last month and the country's largest provider expects it to rise to 50 per cent.
From July 1 savers over 65 who have been in KiwiSaver for five years have been able to apply to their provider and break into their nest egg.
About 17,500 people were eligible last month, with a total 75,000 savers able to take their money out in the year to June 30.
OnePath, which manages nearly $2.9 billion of the KiwiSaver money and has more than 470,000 members, said it had received about 800 applications from people wanting to withdraw their money out of several thousand eligible savers.
ASB Bank, the second-largest market player with $2.5 billion, said it too had had applications from about a third of its eligible savers.