Claimants will keep half of every dollar they earn when they find temporary work while on EI.
Currently, claimants keep the first $75, or 40 per cent, of their benefits, whichever is higher.
The province believes it'll drive economic growth, but the P.E.I. Federation of Labour says it'll be of little help for Islanders on EI.
Carl Pursey, president of the federation, says seasonal workers won't be able to find temporary work in the winter.
The government should focus on retraining workers and scrap the new, bigger changes that are scheduled to take effect early next year, he said.
Some workers in North Rustico told CBC News the changes to EI have become too complicated and they don't understand how it will work.
The changes will cost $74 million over two years.