Real estate commission in Illinois typically runs between 4.5% and 6% of the sale price, with recent industry surveys putting the statewide average near 5.3%. On a $300,000 home at that average, the total fee comes to roughly $15,900. No statute sets the rate, and since August 2024 the buyer’s agent fee is negotiated separately from the listing agreement rather than advertised through the MLS.
What You Actually Pay
Total commission has historically been split between the listing broker representing the seller and the cooperating broker representing the buyer, with each side receiving roughly 2.5% to 3%. On a $400,000 sale at 5%, the total commission is $20,000.
These figures reflect market norms, not law. Rates shift with local competition, property type, and how hard you negotiate. In the Chicago metro area, where brokerage competition is intense, total rates closer to 4.5% show up more often. In smaller downstate markets with fewer agents, 6% is still common. What you pay ultimately comes down to the agreement you sign with your broker.
Who Pays After the 2024 NAR Settlement
A national antitrust settlement involving the National Association of Realtors took effect on August 17, 2024, and changed the mechanics of commission across Illinois. Before the settlement, listing brokers routinely advertised the buyer’s agent commission directly on the Multiple Listing Service, which set an expectation that the seller would cover both sides.
Under the new rules, sellers and their listing brokers can no longer make offers of compensation to buyer agents through the MLS.1National Association of REALTORS. Summary of 2024 MLS Changes The buyer’s agent fee is now negotiated directly between the buyer and their agent, separate from the listing agreement. Sellers can still agree to cover the buyer’s agent fee as part of the purchase contract, but they are no longer locked in from the moment the property lists.
In practice, a few arrangements are common:
- The seller and buyer negotiate as part of the purchase contract that the seller will cover the buyer’s agent fee. This looks like the old model, but it is now an explicit negotiating point.
- The buyer’s broker agreement specifies a fee the buyer pays directly, sometimes from cash reserves and sometimes through a price adjustment agreed to by the seller.
- The seller offers a partial credit toward the buyer’s agent fee, and the buyer covers the rest.
Whoever pays, the commission amounts appear on the Closing Disclosure both parties review before settlement.2Consumer Financial Protection Bureau. 12 CFR 1026.38 – Content of Disclosures for Certain Mortgage Transactions (Closing Disclosure) Nothing about the fee should be a surprise at closing.
Written Agreements and Required Disclosures
Illinois law requires every brokerage relationship to be documented in writing. The listing agreement covers sellers and the buyer-broker agreement covers purchasers, and the document must identify which specific agents will represent you.3Illinois General Assembly. 225 ILCS 454, Section 15-50
The NAR settlement adds a nationwide requirement on top of that: every MLS participant working with a buyer must sign a written buyer-broker agreement before touring any home, including live virtual tours. The agreement must state the exact amount or rate of the agent’s compensation in objectively measurable terms, not open-ended language like “whatever the seller offers.”4National Association of REALTORS. Written Buyer Agreements 101 It also has to include a conspicuous statement that broker commissions are not set by law and are fully negotiable.
Illinois adds its own disclosure obligations around compensation. A licensee must tell you the broker’s compensation policy, including the terms of payment and any amounts offered to cooperating brokers on the other side. If a broker receives compensation from a third party, such as a referral fee from a title company in which the broker holds more than a 1% ownership interest, that must be disclosed at the time of the referral. And if a broker collects payment from both the buyer and the seller in the same transaction, that fact must be disclosed to the client in writing.5Illinois General Assembly. 225 ILCS 454/10-10 – Disclosure of Compensation Failing to make these disclosures can result in disciplinary action against the broker’s license.
Negotiating the Rate
No Illinois statute or regulation sets a required commission rate. When an agent describes a percentage as “standard,” that is a sales pitch, not a legal requirement. Federal antitrust law prohibits brokerages from coordinating to fix rates, and the settlement rules now require every written agreement to state clearly that commissions are fully negotiable.1National Association of REALTORS. Summary of 2024 MLS Changes
Leverage depends on your situation. Sellers listing a desirable property in a hot market can push harder because agents want the listing. Buyers on a higher-priced home can sometimes negotiate a reduced percentage because the dollar amount is still substantial. Some brokerages offer flat-fee or limited-service models where you pay a set amount to get the property on the MLS and handle showings, buyer inquiries, and negotiations yourself. You trade hands-on support for a lower price.
When the Broker Has Earned the Fee
A broker’s right to a commission turns on whether they were the “procuring cause” of the sale, meaning the agent whose efforts started and maintained the chain of events leading to a completed transaction. There is no bright-line test. When two agents worked with the same buyer at different points, the dispute can end up in arbitration.
The traditional standard asks whether the broker produced a buyer who was ready, willing, and able to purchase on the seller’s terms. Once you accept an offer and sign the contract, the broker has generally fulfilled the obligation, even if closing is delayed. Illinois courts have recognized that a seller who backs out after receiving a qualifying offer may still owe the commission. Payment is normally deferred until the deed records at closing, but the right to the fee crystallizes earlier.
Protection Period Clauses
Most listing agreements include a protection period, sometimes called a safety or tail clause, that covers a window after the listing expires. If a buyer who toured the property during the listing term later purchases directly from you after the agreement ends, the original listing broker can still claim the commission.
Protection periods are negotiable and commonly run 30 to 180 days. To activate the clause, the broker typically must provide you with a written list of specific buyers who were shown the property or expressed interest during the listing term. Illinois administrative rules add an important safeguard: the protection period becomes void if you enter into a new exclusive listing agreement with a different broker.6Illinois General Assembly. 68 Illinois Administrative Code 1450.770 – Brokerage Agreements and Property Disclosures Switching brokers will not leave you owing two commissions on the same buyer.
When a Broker Forfeits the Commission
A broker who breaches their fiduciary duty can lose the right to a commission entirely, even for work otherwise properly performed. Under agency principles applied in Illinois, intentional disloyalty, fraud, or concealment of material facts can trigger full forfeiture. Courts have stripped six-figure commissions from brokers caught making false representations to sellers about listing cancellations or hiding conflicts of interest.
The fiduciary duty owed to you includes disclosing every fact within the broker’s knowledge that is material to the transaction. Steering you toward a buyer represented by a friend without disclosing the relationship, or failing to pass along a competing offer, is the kind of breach that puts the commission at risk.
Dual Agency and Its Effect on the Fee
Dual agency occurs when one brokerage, or one individual agent, represents both the buyer and the seller in the same transaction. Illinois permits dual agency only with informed written consent from both clients. The consent form must explain the conflict of interest, specify what the agent can and cannot do, and give each party the opportunity to decline.7Illinois General Assembly. 225 ILCS 454/15-45 – Dual Agency
On price, dual agency can open a door. Because the brokerage collects both sides of the fee, some agents will agree to a reduced total rate. If the listing agreement calls for 5% total and the listing broker also brings the buyer, there is room to negotiate down, since the brokerage does not need to split with an outside firm. The tradeoff matters: a dual agent is limited in advocating for either party and cannot share one client’s confidential information with the other. You are trading full representation for potential savings.
The dual agency disclosure form must be presented when you first enter into the brokerage agreement, and the broker must obtain separate written confirmation of your consent before you execute any purchase contract in a dual agency situation.7Illinois General Assembly. 225 ILCS 454/15-45 – Dual Agency
Other Seller Closing Costs
Commission is the largest closing expense, but it is not the only one. Illinois is an attorney state by custom. No statute technically requires a lawyer at closing, but virtually all residential transactions involve one. A real estate attorney generally charges $500 to $1,500 for a standard residential closing, and more for complex deals.
Sellers also commonly pay for:
- Title insurance. In Illinois, the seller customarily provides the buyer’s title insurance policy, with costs varying by sale price and title company.
- State transfer tax. Illinois charges $0.50 per $500 of the sale price, effectively $1 per $1,000. Some municipalities, particularly Chicago, impose additional local transfer taxes that can be substantially higher.
- Prorated property taxes and HOA fees through the closing date.
- Recording fees, typically ranging from roughly $20 to $80 depending on the county.
On a $350,000 home at 5%, the commission alone is $17,500, and total seller closing costs can reach $20,000 to $23,000 once everything is added in. Factor that into any calculation of your net proceeds before you set a listing price.