CoinStar machines take a 10.9 percent cut from any coins turned into cash. As of 2015, CoinStar machines also accept gift cards for cash for up to 15 percent of the card's value as a processing fee.
When trading in a gift card for cash, CoinStar machines also offer free coin counting if coins are also being traded in for cash. Also, gift cards must have a balance over $20 or they will not be accepted.
There is a limit to the amount of gift cards that can be traded in per day with fees varying based on the type of gift card, but users can trade in an unlimited amount of coins for the flat 10.9 percent fee.