 Now, Costco bargain hunters are going to have to pay a little bit more, an additional $5 to $10 annually, as the popular warehouse chain prepares to raise its membership fees for the first time in seven years. The Issaquah Washington Company disclosed the forthcoming 8% increase in the fee to gain entry in its more than 700 warehouses in the U.S. and Canada as part of a monthly sales report Wednesday. The new fee set to take effect September 1st will boost the price of Costco's basic Gold Star membership from $60 to $65 annually.