In most home-purchase conversations, the friendly agent showing the property works for the seller. Their job - and their legal duty - is to get the best outcome for the person selling. That is not a criticism of listing agents; it is simply whose side they are on.
A buyer's agent flips that relationship. When you retain one, that agent owes fiduciary duties to you: loyalty, full disclosure, confidentiality, reasonable care, and accounting. They negotiate for your interests, not the seller's.
The disclosure you should expect
Massachusetts requires real estate licensees to present the Massachusetts Mandatory Licensee-Consumer Relationship Disclosure at the first in-person meeting to discuss a specific property. It spells out who the agent represents. If you are handed this form, read it - it tells you whether the person across the table is working for you or for the other side.
What a buyer's agent does day to day
Beyond opening doors, a good buyer's agent helps you define what you can afford, surfaces listings the moment they hit the market, researches a property's history and condition, prepares a competitive but disciplined offer, coordinates inspections and the attorney review, and keeps the transaction on track through closing.
What it typically costs you
Compensation arrangements have evolved, especially after the 2024 industry settlement changed how commissions are presented. The specifics should always be spelled out in writing before you tour homes, so there are no surprises. Ask directly how your agent is paid - a straightforward answer is a good sign.
This article is general information, not legal advice. Your specific situation may differ; consult a licensed professional.