The typical Costco Wholesale Cashier salary is $14. Cashier salaries at Costco Wholesale can range from $8 - $23. This estimate is based upon 151 Costco Wholesale Cashier salary report(s) provided by employees or estimated based upon statistical methods. When factoring in bonuses and additional compensation, a Cashier at Costco Wholesale can expect to make an average total pay of $29,187 . See all Cashier salaries to learn how this stacks up in the market.