Oregonians will be voting next month on whether to require food labeling for GMO's.
The firm EconoNorthwest looked at more than two dozen studies on GE labeling.
Bob Whelan with the group says they calculated the median figure.
"I guess in theory you could skip labeling food altogether and save a few dollars a year on groceries. But consumers value information and when you cut through all the research, it's quite clear -- the cost of changing the label is about $2.30 a year."
Two dollars 30 cents is in sharp contrast to anti Measure 92 ads which claim that farmers and food producers will have to spend millions of dollars to accommodate food labeling.
Researchers found the costs ranged from 32 cents to $15 dollars per consumer per year.