How Long Do You Have to Appeal an Arbitration Award?

Under the Federal Arbitration Act, you have three months from the date the final arbitration award is delivered to serve notice that you are challenging it in court.¹ That is how long you have to appeal an arbitration award under federal law, and it is one of the shortest deadlines in civil litigation. Miss it by a day and your right to contest the result is generally gone for good. The challenge itself is also narrower than a traditional appeal: courts will not second-guess the arbitrator’s reasoning or reweigh the evidence. They step in only when something went fundamentally wrong with the process.

How the Three Months Is Counted

Section 12 of the FAA requires that notice of a motion to vacate, modify, or correct an arbitration award be served on the opposing party or their attorney within three months after the award is filed or delivered.¹ It is not a soft guideline. Once three months pass, the losing party loses the ability to challenge the award through the courts.

A detail that trips people up: three months is not the same as 90 days. Federal courts calculate the period using Federal Rule of Civil Procedure 6(a). You exclude the day the award was delivered. You count three calendar months forward from the next day. If the last day falls on a weekend or legal holiday, the deadline extends to the next business day. So an award delivered on March 15 gives you until June 16 to serve notice, not just 90 days from March 15.

When the Clock Starts

The three-month period begins only when the final, signed award is formally delivered to the parties.¹ An informal phone call from your attorney saying “we lost” does not start it. Neither does a preliminary or partial award. The trigger is receipt of the final executed document.

If the arbitrator corrects a clerical error or miscalculation after issuing the award, the clock may reset from the date the corrected version is delivered. That can shift your deadline by days or weeks, so confirm the exact delivery date of the final award and work backward from there. That date is everything.

State Deadlines May Be Different

Many states have their own arbitration statutes, often modeled on the Uniform Arbitration Act, that impose similar but not identical deadlines. State deadlines commonly run 90 days rather than three calendar months. Whether the federal or state standard controls depends on the nature of the dispute and the jurisdiction. Either way, the window is measured in weeks, not years, and the safest assumption is the shorter of the two.

Can the Deadline Be Extended?

Federal courts are split on whether equitable tolling can rescue a party that misses the three-month window. As of 2023, the Seventh, Ninth, Tenth, and Eleventh Circuits have held that the deadline is not jurisdictional and that courts may toll it in extraordinary circumstances. The Fourth and Fifth Circuits disagree and treat the deadline as absolute. If your case falls in a circuit that has not weighed in, the answer is genuinely uncertain.

Even in circuits that allow tolling, the bar is punishingly high. You would need to show extraordinary circumstances beyond your control that you could not have avoided through reasonable diligence. A busy schedule, a slow attorney, or confusion about the deadline will not qualify. Something closer to the opposing party actively concealing the award from you is the kind of situation courts have in mind. Treat the three-month window as a hard stop regardless of where you are located.

What You Can Actually Argue if You File in Time

Meeting the deadline gets you into court. Winning is a separate problem, and the grounds are narrow. Section 10 of the FAA lists four situations where a court can vacate an award:²

Corruption, fraud, or undue means procured the award.
Evident partiality or corruption on the part of the arbitrator, such as an undisclosed financial relationship with one side.
Arbitrator misconduct, such as refusing to postpone a hearing for good cause or refusing to consider relevant evidence.
The arbitrator exceeded their authority, deciding an issue never submitted or issuing a remedy beyond what the arbitration agreement allowed.

Courts start from a heavy presumption that the award is valid, and the party challenging it carries the full burden of proof. Most vacatur motions fail.

If the problem is smaller, Section 11 allows modification or correction rather than vacatur in three situations: a material miscalculation or a clear mistake in describing a person, property, or thing; a ruling on an issue that was never submitted, as long as the extra ruling does not affect the merits of the properly submitted issues; and a defect in the form of the award that does not change its substance.³ The same three-month service deadline applies.¹

Some federal circuits recognize an additional ground called manifest disregard of the law, meaning the arbitrator knew the clearly applicable legal rule and consciously chose to ignore it. The doctrine is on shaky ground. The Fifth Circuit has rejected it outright as an independent basis for vacatur. Other circuits still apply it in limited form. If manifest disregard is your theory, find out whether your circuit still recognizes it before investing in the challenge.

What Missing the Deadline Costs You

While you are deciding whether to challenge, the winning party has a deadline running in the opposite direction. Under Section 9 of the FAA, if the arbitration agreement provides for court enforcement, either party can apply to confirm the award at any time within one year after it is made.⁴ Once confirmed, the award becomes a court judgment with the same force as any other judgment. The winning party can use standard collection tools like garnishment and liens.

The asymmetry matters. The winning side has a full year to confirm. You have three months to challenge. If you let three months lapse without filing, the other side can seek confirmation and you have no procedural mechanism to object on the merits. Missing the deadline does not just close off the challenge. It effectively makes the award bulletproof.

Filing on time does not automatically freeze the award either. Nothing in the FAA prevents the winning party from seeking to confirm and enforce the award while your challenge is pending.⁵ To prevent that, you have to ask the court for a stay of enforcement, and courts have discretion to grant or deny one. File the stay request at the same time as your vacatur motion. Waiting even a few weeks gives the other side time to confirm the award and start collecting.

What Happens If You Win

If the court vacates the award, the dispute does not disappear. Under Section 10(b) of the FAA, the court has discretion to send the case back to the arbitrators for a rehearing, but only if the time limit set in the original arbitration agreement for issuing an award has not expired.² If the agreement required an award within, say, six months and that window has closed, a rehearing may not be available under the FAA.

When a rehearing is not available or appropriate, the parties may end up litigating the underlying dispute in court or negotiating a new arbitration agreement. If the original arbitrator was the problem, a rehearing would typically go before a different arbitrator. Winning a vacatur motion is the start of a new round of dispute resolution, not the end of the fight. That is worth knowing before you spend the three months deciding whether to file.

1
Office of the Law Revision Counsel. 9 U.S. Code 12 – Notice of Motions to Vacate or Modify; Service; Stay of Proceedings
2
Office of the Law Revision Counsel. 9 USC 10 – Same; Vacation; Grounds; Rehearing
3
Office of the Law Revision Counsel. 9 USC 11 – Same; Modification or Correction; Grounds; Order
4
Office of the Law Revision Counsel. 9 USC 9 – Award of Arbitrators; Confirmation; Jurisdiction; Procedure
5
Office of the Law Revision Counsel. 9 U.S. Code 13 – Papers Filed With Order on Motions; Judgment; Docketing; Force and Effect; Enforcement