By Samo Drole Next week we will begin offering volume-based rebates for trades placed on Coinbase Exchange. Our standard maker-taker fee structure still applies, however, traders will now receive a daily rebate based on their trading volume as a percentage of the total 30-day volume for each Coinbase Exchange order book.
Maker Orders
Maker orders are not immediately filled, creating liquidity on the book. These orders facilitate trading and carry a 0% fee.
Taker Orders
Taker orders are immediately filled, removing liquidity from the book. These orders are charged a fee at the time of trade but receive a daily rebate resulting in an effective fee …read more
Source:: http://blog.coinbase.com/2015/12/08/coinbase-exchange-introduces-volume-based-rebates/