In contract law, a counter offer is a response to an offer that changes one or more of its terms. The moment you make one, two things happen at once: the original offer is rejected, and a brand-new offer takes its place. The person who made the first proposal now holds the power to accept, reject, or counter again, and you cannot later change your mind and accept the original terms.
The Two Things a Counter Offer Does at Once
A counter offer works as a rejection and a new proposal in a single move. By altering any term of what was offered to you, you have legally turned down the original deal and put a fresh one on the table.
That dual function also swaps the roles of the parties. The person who received the first offer (the offeree) becomes the new offeror, and the party who proposed the original terms now sits in the position of deciding whether to accept. The negotiation effectively resets, and the new proposal has to stand on its own.
Counter Offer or Just a Question?
Not every response to an offer counts as a counter offer, and the difference matters a lot. An inquiry keeps the original offer alive. A counter offer kills it.
The dividing line is your language and your intent. “I’ll pay $340,000 instead of $350,000” is a counter offer, because it proposes a definite substitution. “Would you consider a lower price?” or “Could we push the deadline back a week?” is generally treated as a mere inquiry, because you are exploring flexibility rather than replacing a term. If your wording is tentative, asks for more information, or signals that you are still weighing the original offer, courts are more likely to treat it as an inquiry that preserves your right to accept the original terms later.
If you are not sure whether you want to walk away from the terms on the table, phrase your response as a question, not as a substitute term.
The Mirror Image Rule
Under traditional contract law, a valid acceptance has to match the offer exactly, term for term. This is the mirror image rule. Change anything, no matter how small, and your response is not an acceptance; it is a counter offer.
Section 59 of the Restatement (Second) of Contracts captures the same idea: a reply that claims to accept but conditions acceptance on the offeror agreeing to additional or different terms is not an acceptance at all. Even a seemingly minor condition, like requesting a different payment method, can keep a contract from forming.
Sales of Goods Follow a Different Rule
The mirror image rule still governs common-law contracts, including services and real estate. For sales of goods, the Uniform Commercial Code takes a looser approach. Under UCC Section 2-207, a clear and timely expression of acceptance can create a binding contract even when it includes terms that differ from or add to the original offer.
Those additional terms are treated as proposals. When both parties are merchants, the new terms automatically become part of the contract unless one of three things is true:
- The original offer expressly limited acceptance to its exact terms.
- The new terms materially change the deal, such as a liability waiver or a drastically different warranty.
- The offeror has already objected to the new terms, or objects within a reasonable time after learning of them.
So if your transaction is a sale of goods, a response that adds extra terms may still form a contract rather than a counter offer.1Legal Information Institute (LII) / Cornell Law School. UCC 2-207 – Additional Terms in Acceptance or Confirmation
You Cannot Go Back to the Original Offer
Once you make a counter offer, the original offer is gone. You cannot reject your own counter offer and then circle back to accept what was first proposed. Section 39 of the Restatement (Second) of Contracts puts it plainly: the offeree’s power of acceptance ends when they make a counter offer, unless the offeror has indicated otherwise or the counter offer itself signals that the offeree is still keeping the original under consideration.
The original offeror is also released. They have no obligation to honor those first terms unless they voluntarily put them back on the table.
Option Contracts and Firm Offers
There is one meaningful exception. If the original offer is backed by an option contract, meaning you paid something of value for the offeror’s promise to keep the offer open, a counter offer does not destroy it. Section 37 of the Restatement (Second) of Contracts says the power of acceptance under an option contract survives rejection, counter offers, and even the death of the offeror.
A parallel protection applies to merchants under UCC Section 2-205. A merchant who makes a signed, written offer to buy or sell goods, with an assurance that it will stay open, cannot revoke it during the stated period, or for a reasonable time if no period is stated, up to a maximum of three months. This is called a firm offer, and it remains open through counter offers during that window.2Legal Information Institute (LII) / Cornell Law School. UCC 2-205 – Firm Offers
Revoking a Counter Offer You Made
Because your counter offer is itself an offer, you can revoke it any time before the other side accepts, as long as the revocation reaches them first. After they accept, you are bound.
Terms People Commonly Change
A counter offer can touch almost any term in the original proposal. The adjustments that come up most often include:
- Price, raised or lowered to reflect what the party thinks the deal is worth.
- Deadlines, including closing dates, delivery schedules, and performance timelines.
- Contingencies, such as a satisfactory inspection, an appraisal, or financing at an acceptable rate.
- Included assets, specifying which fixtures, equipment, or appliances transfer with the sale.
- Risk allocation, shifting responsibility for repairs, warranties, insurance, or liability.
Any one of these changes is enough to turn a response into a counter offer under the mirror image rule. The number of changes does not matter; altering one term has the same legal effect as rewriting the whole proposal.
When Counter Offers Finally Produce a Contract
A contract forms when one party gives an unqualified acceptance of the most recent counter offer. The acceptance cannot introduce any new conditions or modifications, because doing so just creates another counter offer and restarts the cycle. In many deals, acceptance comes as a signature on a written document, though oral acceptance can create a binding contract where writing is not required.
Once both sides have agreed to identical terms and shown intent to be bound, the negotiating stops and the agreement is enforceable.