"If you've got more than 10 years before you retire, then you'll need to think about how inflation will impact the buying power of your savings."
For a 30 year old planning to have a retirement income of $200 per week on top of New Zealand Super the target would probably need to be double today's money when they reach 65, Body said.
"The change to our survey provides a more realistic financial target for the retirement lifestyle people want to have."
The change prompted 28 per cent of those saving to say they would increase their contributions to KiwiSaver.
A further 58 per cent said they would not change their plans despite seeing the impact of inflation but accepted they would need to save more.
Body said people could increase their saving or change their investment approach to help counter inflation.
The survey questioned 989 people aged between 15 and 64 in January and February.