Most settlement offers don’t come with a legally fixed acceptance window. If the offer states a deadline, that deadline is the answer to how long you have to accept a settlement offer. If it doesn’t, you have what the law calls a “reasonable time,” which might be a few days or a few weeks depending on the case. The one significant exception is a formal offer of judgment in federal court, which carries a hard 14-day window and financial penalties if you turn it down and later do worse at trial.
Offers With a Stated Deadline
An express deadline leaves no room to negotiate the timing. If the offer says it expires on a specific date and time, your power to accept ends at that moment. Miss it by an hour and the offer is dead. The offeror has no obligation to honor a late acceptance, and courts will not rewrite the deadline to save you.
Read the deadline language carefully. “Open until” a date usually means end of business that day. “Must be received by” is stricter than “must be sent by,” because the first shifts the risk of mail or email delays onto you. When the wording is ambiguous, treat the earliest reasonable interpretation as the real deadline.
Offers Without a Deadline
When the offer is silent, general contract law fills the gap. The Restatement of Contracts provides that the power to accept terminates “at the end of a reasonable time,” and what counts as reasonable is “a question of fact depending on the nature of the contract proposed, the usages of business and other circumstances of the case.”
In practical terms, a straightforward fender-bender claim might give you a week or two. A complex commercial dispute with millions at stake could justify a month or more of deliberation. The ambiguity cuts both ways: you might have more time than you think, but you have no guarantee the offer will still be alive when you try to accept.
Several factors drive where a specific offer falls on that spectrum:
- Stage of litigation. Pre-suit offers tend to carry longer windows because neither side has trial preparation costs mounting. Once a trial date is set, the pressure to resolve tightens the window.
- Complexity of the claim. A simple property damage dispute allows less deliberation time than a multi-party commercial case requiring forensic accounting. Courts account for the volume of information the offeree reasonably needs to evaluate.
- Court-imposed deadlines. Discovery cutoffs, mediation deadlines, and pretrial conferences create external pressure. A settlement offer made two weeks before a mandatory mediation reads as having a shorter reasonable life than one made six months before trial.
- The offeror’s situation. An insurer trying to close its books before quarter-end or a defendant facing an upcoming deposition may impose tight deadlines to force a decision. Urgency on the offeror’s side usually means a shorter window.
- Communication between parties. Active, ongoing negotiations tend to extend what’s reasonable because both sides are signaling continued interest. Silence after receiving an offer tends to shorten it.
The 14-Day Rule for Federal Offers of Judgment
Federal Rule of Civil Procedure 68 creates a special category of settlement offer with a hard deadline and real teeth. A defendant in federal court can serve an “offer of judgment” at least 14 days before trial, proposing to let the plaintiff take judgment for a specified amount. The plaintiff then has exactly 14 days to accept by serving written notice. No extensions, no “reasonable time” analysis, just 14 days from service.1Legal Information Institute. Federal Rules of Civil Procedure Rule 68 – Offer of Judgment
The penalty for rejecting a Rule 68 offer is what makes it dangerous. If the plaintiff turns down the offer and later wins a judgment that is less favorable than the rejected offer, the plaintiff must pay all of the defendant’s litigation costs incurred after the offer was made.1Legal Information Institute. Federal Rules of Civil Procedure Rule 68 – Offer of Judgment In cases brought under statutes that define “costs” to include attorney’s fees, such as federal civil rights laws, the financial hit can wipe out the value of a favorable verdict. Many states have their own versions of this rule with similar cost-shifting mechanisms, so the dynamic is not limited to federal court.
Why You Shouldn’t Wait Even If Time Remains
An offer without a deadline is not just subject to the reasonable-time clock. The offeror can also pull it back at any time before you accept. This holds even when the offer says something like “open for 30 days,” because a stated time frame alone is generally treated as an expression of intent, not a binding promise to keep the offer available.
There are narrow exceptions. An option contract, where you pay separate consideration for the right to accept within a set period, is irrevocable during that period. In limited situations, if you relied on the offer to your detriment and the offeror should have expected that reliance, a court might hold the offer open under a promissory estoppel theory. Outside those scenarios, the default rule is clear: the offeror can change their mind, and you have no claim if they do.
The practical takeaway is that speed matters. If an offer looks acceptable, sitting on it while you wait for something better carries real risk. The offer can vanish before its deadline arrives.
Counteroffers Kill the Original Offer
This is where people get burned. Making a counteroffer does not pause or modify the original offer. It kills it. Under basic contract law, a counteroffer operates as a rejection of the original offer and simultaneously creates a new, different offer. The original offer can no longer be accepted, even if it had days or weeks remaining on its deadline.2Legal Information Institute. Counteroffer
Say an insurance company offers you $50,000 to settle a personal injury claim, open for 30 days. On day 10, you respond with a demand for $75,000. That response is a counteroffer, which means the $50,000 offer is gone. If the insurer says no to your $75,000, you cannot go back and accept the original $50,000. The insurer might make a new offer at $50,000, or at $40,000, or walk away entirely. You no longer have the right to accept something you already rejected by countering.
If you want to negotiate without losing the safety net of an existing offer, ask questions, request clarification, or express interest in continued talks. Do not propose different terms until you’re ready to give up the original number.
Asking for More Time
If you need additional time, ask for it. There is nothing unusual about requesting an extension, and most parties will grant a reasonable one when the request comes with a clear reason: waiting on medical records, consulting an expert, getting a second legal opinion.
Get the extension confirmed in writing. An email exchange works. A verbal agreement to extend is better than nothing but creates an obvious proof problem if the other side later claims you missed the deadline. The written confirmation should state the new deadline clearly and be acknowledged by the offeror or their attorney. Without that paper trail, you are gambling that the other side will honor a handshake agreement when money is on the line.
When Your Acceptance Legally Takes Effect
If you’re accepting by mail, email, or fax, knowing when acceptance becomes legally effective can save a deal. Under the mailbox rule, an acceptance takes effect the moment you send it, not when the offeror receives it. If a settlement offer expires on Friday and you drop your written acceptance in the mail on Thursday, the acceptance is effective Thursday, even if the letter doesn’t arrive until the following week.
Two important limits. First, the offeror can override this default by specifying that acceptance is effective only upon receipt. If the offer says “acceptance must be received by” a certain date, mailing it the day before is not enough. Second, the mailbox rule does not apply to option contracts, where acceptance must actually reach the offeror to be effective. Read the offer language carefully before assuming that sending is the same as delivering.
What Happens After the Deadline Passes
Once a deadline passes without acceptance, the offer is gone. You have no right to accept it, and the offeror has no obligation to renew it. Both sides revert to whatever position they were in before the offer was made, which usually means continued litigation.
The offeror might make a new offer, but there is no guarantee it will match the old one. Expired offers often come back at lower numbers. If the case has progressed and the offeror has spent more on legal fees since the original offer, they will typically factor those costs into any new proposal. If discovery has revealed weaknesses in your case, the discount gets steeper.
In federal court, the Rule 68 penalty makes letting an offer expire particularly costly. Reject a formal offer of judgment, win less at trial than the offer was worth, and you bear the defendant’s post-offer costs.1Legal Information Institute. Federal Rules of Civil Procedure Rule 68 – Offer of Judgment In fee-shifting cases, that penalty can exceed the amount you eventually recover.