In short, when signing a buyer agency agreement make sure you are comfortable with the agent and that you understand your responsibilities. I have done a number of buyer agencies and the buyer has not had to pay any fees. So it all depends!
As a side note it is very much in your interest to have a buyer agency, because that agent is representing you and not the seller. Normally all agents represent the seller unless they have a agreement to make the buyer a client. Very good question!
Wish you well.
First Weber Group
Certifed Distressed Property Expert
You may wish to browse through this Question.(Over 700 Comments..Current..Couple hundred agents)
The Discussion covers how agents feel about Commissions, showing or not showing homes based on Commission, what Commission many agents expect and much more pertaining to Commissions.
I think you will find it a very informative and interesting Read.
Good hunting, Dunes
Bottom line: In most cases, you do not have to pay a real estate agent when you're buying. Most of the time, the entire commission is paid by the seller. However, as the previous answers noted, that's something you should discuss with your agent.
Once in a while there may be a situation where the Seller (For Sale By Owner) may say, I won't pay the agent- then adjust your offer by the amount you would pay your agent and pay your agent directly.
Sit down with an agent you'd like to work with- ask them questions, make sure you are comfortable that they with them and their ability to represent you in the manner you expect. It's very important that the agent you work with matches your personality.
All the Best to you!