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Real Estate

What is the co-operating brokerage commission and can I reduce it after listing?

TSL Written by the Treadstone Law team· Updated June 2026

The co-operating brokerage commission (sometimes called the co-op fee) is the portion of the total commission that the listing brokerage offers to the brokerage representing the buyer. In Ontario, when a property is listed on MLS, the co-op fee is disclosed to buyer's agents who review the listing.

Once you have signed a listing agreement specifying a co-op commission and the listing is live on MLS, reducing that amount mid-listing can be complicated. Changing the listed co-op fee requires amending the listing agreement and updating the MLS listing — the brokerage will need to agree to the change and the amended amount becomes visible to buyer's agents. A significant reduction mid-listing can deter buyer's agents who had already planned to show the property to their clients based on the original fee.

If you want flexibility in co-operating compensation, negotiate that into the listing agreement at the outset — before signing. Some listing agreements structure the co-op as a fixed dollar amount rather than a percentage, which gives slightly more certainty. Your real estate lawyer can advise you on what terms are achievable and what impact they might have on your sale.

Key takeaways

  • The co-op commission is the fee offered to the buyer's brokerage, disclosed on MLS
  • Reducing the co-op fee mid-listing is possible but can deter buyer's agents who saw the original amount
  • Negotiate co-op flexibility into the listing agreement before signing
  • Consult your lawyer about the practical impact of different co-op structures on your sale
This is general information, not legal advice. It doesn’t create a lawyer–client relationship, and the rules can change. For advice on your situation, a Treadstone real estate lawyer can help.
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