Sometimes the owner will be willing to pay a portion or all of the commission. There are many variables, but the full commission rarely exceeds 15%. If your offer is sufficient to warrant doing so, you may be able to negotiate the portion you pick up vs. the portion the owner pays.
Real Estate firms that belong to REBNY(the Real Estate Board of New York) are required, by rule, to share (co-broke) their EXCLUSIVE listings with other REBNY firms.
There is usually have a 50/50 split of the commission, regardless of the commission amount, between the landlord's representative and the tenant's representative. Representation does not follow the compensation.
This is why New York State requires all brokers/sales agents to present their customer with a Disclosure Form. This is to clarify the nature of their agency relationship, and to make sure that the tenant or landlord knows for whom the agent is working, as well as the rights and obligation this agency creates. You can see a Disclosure form by clicking on the link below.
The landlord's representative, who is the one holding the exclusive listing will have the decision making power when it comes to determine a potential commission discount, as the tenant is the one "making an offer" on a listed unit.
There are some scenarios where the exclusive listing agent may reduce their portion of the commission in order to incentivize other agents to come show the apartment.
And sometimes the listing agent may be paid by the landlord, allowing the agent representing the tenant to collect their own fee from the tenant.