What Is a Rule 35 Motion in Federal Court??

Federal Criminal Rule 35 provides for limited changes to criminal sentences in federal court. While it is the primary tool for adjusting sentences after they have been imposed, Rule 35 motions are only available in narrow circumstances. As explained below, federal district judges cannot entertain Rule 35 motions unless the relevant conditions and procedural requirements are met.

Federal Criminal Rule 35 contains two sections that apply in different circumstances:

Rule 35(a)

Rule 35(a) allows for the correction of “clear errors” that were not apparent during a sentencing hearing. These clear errors include clerical mistakes, mathematical errors, and errors resulting from illegal sentencing guidelines. Rule 35(a) motions are limited to corrections of arithmetical, technical, or other clear error, and the court's authority to make such a correction expires 14 days after sentencing.

Rule 35(b)

Rule 35(b) allows for federal prosecutors to request a reduction in their defendant’s sentence if the defendant has provided substantial assistance in connection with an ongoing or anticipated federal criminal investigation. Rule 35(b) motions are filed at the government’s election, and they are subject to strict procedural requirements.

Other Important Rule 35 Distinctions

Because Federal Criminal Rule 35 only applies in federal district court, it does not govern cases involving sentences imposed by state courts. There are analogous rules and procedures available at the state level, but these are not governed by Rule 35.

Another important distinction is that Criminal Rule 35 is not the same as Civil Rule 35. Federal Civil Rule 35 addresses the ability to order physical and mental examinations in federal civil litigation cases. Specifically, Rule 35 requires the party seeking to conduct the examination to demonstrate good cause, and Rule 35 requires a party to the litigation to have a physical or mental condition that is “in controversy.”

Finally, Rule 43 requires a defendant to be present at sentencing. But because Rule 35 motions are filed after sentencing, Rule 43 does not require a defendant’s presence in order to hold a proceeding under Rule 35.

When can a judge correct a sentence under Rule 35(a)?

Rule 35(a) applies in cases that involve arithmetic errors, technical mistakes, and other types of clear sentencing errors. Rule 35(a) explicitly requires that any correction occur “promptly.” Rule 35(a) itself supplies the limit on prompt correction, providing:

“The district court has a unique and limited role under Rule 35(a) to correct a sentence for ‘clear error.’ A party may file a motion for Rule 35(a) relief at any time. While the district court is required to respond promptly, the court is not required to correct errors that were apparent at sentencing but ignored by the sentencing judge.”

• 14-Day Window. The Sentencing Committee has clarified that, generally, for the purposes of Rule 35(a), any correction must be made within 14 days. The definition of “sentencing” used by the Sentencing Committee in this context is “the oral announcement of sentence.” This is the same definition of sentencing that is used under Rule 35(c), with that rule stating: “Sentencing is the oral announcement of sentence, with any accompanying orders and any other matters as required by law or local court rule.”, Fed. R. Crim. P. 35(c)
• Use of Rule 35(a) and Rule 35(b). Filing a Rule 35(a) motion within the 14-day window does not preserve the district court’s ability to later correct the defendant’s sentence under either Rule 35(a) or Rule 35(b). In fact, Rule 45 states that “unless a federal rule or statute says otherwise, time cannot be extended. Rule 35(a) does not permit extensions of time. . .. Therefore, a district court may not extend the 14-day period in which it can correct a sentence under Rule 35(a).”, Fed. R. Crim. P. 45(b)(2)
• Prohibition on General Reconsideration. Rule 35(a) does not permit a district court to reconsider its sentencing choices. Instead, Rule 35(a) only allows for the correction of clear errors. While a district court does have the authority to independently correct any qualifying Rule 35(a) error, it cannot grant a motion for general reconsideration.
• Interpretation of the Sentencing Guidelines. Federal Sentencing Guidelines issues are one of the most common issues that appear in Rule 35(a) motions. Generally, disputed interpretations of the Sentencing Guidelines fall outside of the narrow authority that gives federal judges the power to correct clear errors under Rule 35(a). However, if there is a clear consensus that is contrary to the district court’s interpretation, then a Rule 35(a) motion that requests the court correct its Sentencing Guidelines interpretation may be warranted.

How do Rule 36 and an appeal differ from Rule 35(a)?

Rule 36 allows for clerical corrections at any time. While both Rule 35(a) and Rule 36 provide for correction of sentencing errors, the key difference between the rules is that Rule 36 corrections only apply to clerical errors that do not result in substantive changes. Unlike Rule 36 corrections, Rule 35(a) corrections must be sought “promptly” from the date of sentencing.

Rule 35(a) is also different from a sentencing appeal in two key respects: (i) a Rule 35(a) motion does not suspend the appeal deadline, and (ii) a Rule 35(a) motion is not a substitute for a sentencing appeal. As a result, defendants who file

Who can obtain a substantial-assistance reduction under Rule 35(b)?

While a defendant may be eligible for a substantial-assistance reduction under Rule 35(b), only the government may request this reduction. Defendants and their counsel will never be able to file a Rule 35(b) motion on their own.

Rule 35(b) requires that a defendant provide substantial assistance to the government after receiving their sentence in federal court. Rule 35(b)(3) expressly permits the court to consider the defendant's presentence assistance when evaluating whether the defendant has provided substantial assistance. Rule 35(b) only allows for a sentence reduction where assistance is rendered “in relation to investigations or prosecutions of another person.”

Importantly, Rule 35(b) does not require that the assistance rendered lead to any convictions. If the prosecutor believes that the defendant’s assistance was “substantial,” they may seek a reduction in their sentence as a result of the assistance provided.

Even when the government decides to move for a sentence reduction under Rule 35(b), this does not necessarily mean that the defendant will receive a reduction in their sentence. A district judge will determine whether to grant the government’s motion to reduce the sentence, and if the district judge grants the government’s motion, then they will determine by how much to reduce the defendant’s sentence.

The United States Sentencing Guidelines do not offer fixed percentages or established formulas for sentence reductions under Rule 35(b). Instead, the Sentencing Guidelines provide a set of guidelines for district judges, in order to ensure that judges do not deviate too significantly from sentencing recommendations when determining a defendant’s Rule 35(b) sentence.

Do you need to file a Rule 35(b) motion?

No. Under Rule 35(b), defendants cannot file a motion for sentence reductions. Only the government will be able to file motions to reduce your sentence under Rule 35(b), and then only in cases where it has been determined that substantial assistance was provided after your sentencing. With this in mind, you should work with your federal defense lawyer to determine whether the government has already filed a Rule 35(b) motion on your behalf, or whether the government will likely do so in the future.

Does it depend on the Sentence Guidelines?

The federal Sentencing Guidelines provide no advice or rules for imposing reductions in this situation. For example, Rule 35(b)(4) states that “[w]hen acting under Rule 35(b), the court may reduce the sentence to a level below the minimum sentence established by statute.” Because of this, if you’re facing a sentence that includes an unusually high mandatory minimum sentence, you should make sure that you discuss this in depth with your federal sentencing lawyer. An experienced federal defense attorney who has a lot of experience with sentence reductions under Rule 35(b) will be able to explain how the district court will determine your reduced sentence, and will be able to advise you about the likelihood of obtaining a reduction.

If any of this describes your situation, it is worth talking it through with counsel. Spodek Law Group can be reached at 212-300-5196.

When can the government file a late Rule 35(b) motion?

As stated above, Rule 35(b) contains no general equitable exception to the one-year deadline that ordinarily applies for government-requested substantial-assistance reductions. Instead, Rule 35(b)(2) sets forth specific requirements that must be met in order to support a late Rule 35(b) motion:

• Late-discovered information, If the government’s late Rule 35(b) motion is based on “information not known” to the government prior to the original deadline, and the government has “taken steps to discover this information before the deadline passed,” the government may be entitled to a reduction for the defendant’s assistance.
• Information becoming useful, If the government’s late Rule 35(b) motion is based on “information that the government discovered before the deadline passed, but that did not, until recently, become ‘useful’,” the government may also be entitled to a reduction for the defendant’s assistance.
• Unforeseeably useful information, If the government’s late Rule 35(b) motion is based on “information that was both unknown to the government, and whose value could not have been reasonably foreseen” when the information was first discovered, then this may support a late Rule 35(b) motion. In this case, the government must have “presented the information to the relevant authorities promptly after discovering its value.”

In each case, if the government’s late Rule 35(b) motion falls outside of the ordinary one-year window that applies for substantial-assistance reductions, the government must show that the defendant's substantial assistance involved information of a kind described in Rule 35(b)(2)(A), (B), or (C).

This, in turn, gives the district judge the ability to determine whether the government’s request for a reduction under Rule 35(b) is based on information that supports a sentence reduction after the original deadline has passed. With this in mind, you should never file a motion for a Rule 35(b) sentence reduction. Instead, work with your federal defense attorney to determine whether the government has already filed a Rule 35(b) motion on your behalf, or whether it is likely to do so in the future.

How do Section 5K1.1, Section 3553(e), and Rule 35 differ?

While Rule 35(b) is one way for a defendant to obtain a sentence reduction, it is not the only way. Defendants can seek a sentence reduction under Section 5K1.1 of the United States Sentencing Guidelines and Section 3553(e) of the United States Code as well. While these provisions all offer a similar benefit, they differ from Rule 35(b) in a number of ways.

Rule 35(b) vs. Section 5K1.1 of the U.S. Sentencing Guidelines

Section 5K1.1 is a provision of the United States Sentencing Guidelines rather than a Rule. While Rule 35(b) governs defendants who have already been sentenced in federal court, Section 5K1.1 applies before the sentencing has been imposed. As a result, Section 5K1.1 applies to defendants during the sentencing proceedings rather than after sentencing. Like Rule 35(b), however, the application of Section 5K1.1 will require a motion to be filed with the district court by the government.

Rule 35(b) vs. Section 3553(e) of the U.S. Code

Section 3553(e) is a provision of the United States Code that offers similar benefits to Rule 35(b). Like Section 5K1.1, however, Section 3553(e) differs from Rule 35(b) in that it applies during the sentencing process rather than after the defendant’s sentence has been imposed. Like Rule 35(b) and Section 5K1.1, however, Section 3553(e) governs cases in which defendants have provided assistance to the government, and the application of Section 3553(e) also requires the filing of a motion to the district court by the government.

Section 5K1.1 vs. Section 3553(e)

In many cases, defendants will be eligible for a sentence reduction under both Section 5K1.1 and Section 3553(e). However, in Melendez v. United States, 518 U.S. 120 (1996), the Supreme Court noted the difference between the two provisions:

While Section 5K1.1 provides the authority for a judge to reduce a defendant’s sentence within the statutory minimum sentence, the judge must look to the authority of Section 3553(e) if he or she wants to reduce a defendant’s sentence below the statutory minimum sentence.

Are You Eligible for Rule 35(b) Relief After Prior Assistance?

As a final important note, defendants are eligible for relief under Rule 35(b) even if they have already received assistance from Rule 35(b) during sentencing. Rule 35(b) does not limit a defendant to a single sentence reduction, and a defendant may receive relief for assistance provided after sentencing even if they were previously granted relief under Section 5K1.1 or Section 3553(e).

Can a prosecutor refuse to file a Rule 35(b) motion?

As we’ve mentioned above, while prosecutors have the ultimate say in when to file Rule 35(b) motions to request a sentence reduction, substantial cooperation in an ongoing federal criminal investigation does not create an entitlement to such a motion. However, while federal prosecutors generally have broad discretion, they will be subject to Wade review in cases in which they refuse to file a Rule 35(b) motion due to unconstitutional motives.

In Wade v. U.S. Department of Justice (1989), the Supreme Court noted that, “the United States government may not refuse to file a substantial-assistance motion based on a defendant’s race, religion, or other protected status, nor on any other unconstitutional motive.” While defendants are able to present allegations that a prosecutor acted with an unconstitutional motive, however, these allegations must be substantial enough to sustain a motion for a Wade review. Importantly, while a defendant’s allegation that they substantially cooperated will be sufficient to allow the prosecutor to deny their Rule 35(b) motion, this allegation alone does not satisfy Wade’s threshold showing for a substantial-assistance motion.

Is a Rule 35(b) Motion Part of a Plea Agreement?

Another situation in which a federal prosecutor may be constrained in their ability to deny a Rule 35(b) motion is when the prosecutor makes a promise in a plea agreement to file a Rule 35(b) motion if the defendant’s cooperation is satisfactory. A Rule 35(b) motion will not be mandated in the same circumstances as where a prosecutor has made a promise that is legally enforceable, and if you are facing these circumstances, you should discuss your potential options with your federal criminal defense attorney.

How Does Wade Review Work?

In Wade, the Supreme Court recognized that the government is expressly prohibited from using a Rule 35(b) motion (or any other tool in the sentencing process) to facilitate “unconstitutional discrimination based on race, religion, or national origin.” However, as noted above, defendants seeking Wade review will still be required to provide a substantial threshold showing that a prosecutor’s refusal to file a Rule 35(b) motion is predicated on unconstitutional motives, such as race or religion, in order to receive discovery or an evidentiary hearing.

How Long Will the Judge Take After the Motion Is Filed?

Rule 35 does not specify a deadline for the government to request a reduction hearing. When a federal judge conducts a reduction hearing, the purpose is to determine whether granting a sentence reduction is warranted. The judge’s primary determination will be whether the assistance provided by the defendant is sufficiently valuable.

Can the prosecutor’s recommended reduction bind the judge?

No, the prosecutor’s recommended reduction cannot bind the judge. As explained above, a Rule 35(b) sentence reduction is not required, and the judge must grant it based on the findings and evidence presented at the sentencing hearing.

Can the judge deny a Rule 35(b) sentence reduction?

Yes, a judge can deny a Rule 35(b) sentence reduction, even in cases in which the federal prosecutor has recommended a sentence reduction. As long as the judge makes a fact-based determination that the assistance provided by the defendant is not sufficiently valuable to warrant relief, he or she can either deny the Rule 35(b) sentence reduction or grant a reduction that is less than the one the federal prosecutor has requested.

Can the judge order a reduction without an evidentiary hearing?

Rule 35(b) does not require a Reduction Hearing. However, courts will order an evidentiary hearing if the government agrees that the defendant is eligible for Rule 35(b) relief, and the defendant agrees to accept the proposed sentence reduction based on the prosecutor’s recommended sentence reduction.

Can the judge grant a Rule 35(b) sentence reduction without the defendant’s presence?

Under Rule 43(b)(4), a defendant need not be present when the proceeding “involves the correction or reduction of sentence under Rule 35 or 18 U.S.C. §3582(c).” As the Seventh Circuit explained in the case of United States v. Johnston, No. 21-2081 (7th Cir. Oct. 29, 2025), Rule 35 proceedings are “ similar proceedings” for purposes of Rule 43.

When the government moves to reduce a defendant’s sentence under Rule 35, the motion will typically be accompanied by a proposal for the reduced sentence. While the Rule 35-eligible defendant should attend the reduction hearing, federal judges are not required to hold these hearings.

Is there a deadline for a judge to rule on a timely Rule 35(b) motion?

The Federal Rules of Criminal Procedure (FRCP) do not establish a deadline for ruling on a timely filed Rule 35(b) motion. While the deadline for the federal prosecutor to file a Rule 35(b) motion is generally one year after sentencing, the judges are not subject to any similar deadline.

Multiple Rule 35(b) Motions

The fact that Rule 35(b)(3) allows for information provided before the sentencing date to be considered when evaluating a Rule 35(b) sentence reduction does not mean that defendants will not receive a sentence reduction for their pre-sentencing assistance. Defendants who continue to provide substantial assistance to the government may be eligible for more than one Rule 35(b) motion. However, the cooperation must have been distinct and in relation to a separate case in order to justify multiple motions.

Rule 35(b) Benchmarks

There is currently a lot of talk regarding benchmarks for Rule 35(b) sentence reductions. The problem is that there are simply no accepted benchmarks available for any jurisdictions.

In order to determine Rule 35(b) sentence reduction benchmarks on a national level, it will be necessary to identify the proper datasets, the appropriate period to analyze, the applicable jurisdictions, the appropriate methodology, and the types of defendants and convictions that are eligible for reduction.

Once this information becomes available, federal judges may be able to rely on Rule 35(b) benchmarks when deciding whether to grant sentence reductions to eligible defendants.

Does Rule 35 Cover Bond or Other Sentence Remedies?

Rule 35 of the Federal Rules of Criminal Procedure covers federal criminal sentences. It does not cover bond reductions, bond hearings, or bond-related issues.

While prosecutors’ win rates in federal criminal cases are very high, being a defendant who helps the federal government investigate and prosecute criminal activity is important regardless of whether it results in a conviction. However, win rates do not dictate Rule 35 eligibility, either.

If a federal defendant needs another type of remedy, there are plenty of options available besides Rule 35 relief. These include direct appeals, Rule 35(c) motions, Rule 35(b) motions, Rule 2255 motions for habeas corpus relief, and compassion release.

Ordinary good time credits, which most federal prisoners are entitled to under the federal sentencing laws, are independent of assistance credits awarded under Rule 35(b). Both types of credit, however, count toward sentencing purposes, and so do credits given for participation in the First Step Act.

Rule 36 clerical corrections can be made at any time after a sentencing judgment is rendered. However, when an appeal has been filed and the record has been transmitted, the federal appellate court has exclusive jurisdiction. In this case, the district court will need the appellate court’s permission to correct a clerical error.

Once an appeal has been initiated, the district court cannot intervene on the sentencing judgment unless the appellate court approves. Again, this is why it’s important to engage an appellate counsel to help you understand your options for mitigating your sentence or ensuring your sentence is applied correctly.

How much can a judge reduce a sentence for substantial assistance?

While Rule 35(b) applies to sentence reductions for cooperation, it does not mandate sentence reductions. Instead, the government can use Rule 35(b) to move for a sentence reduction. If granted, the sentencing court then determines how much of a reduction to impose. The sentencing court has the power to:

• Grant or deny a proposed Rule 35(b) reduction, and
• Determine the extent of the proposed Rule 35(b) reduction.

What Factors Determine the Amount of a Rule 35(b) Sentence Reduction?

Rule 35(b) does not provide a fixed formula for determining the amount of a sentence reduction. Instead, it gives the sentencing court broad authority to consider any relevant factors. In some cases, the sentencing court may also consult with the Federal Sentencing Commission when determining the appropriate sentence reduction.

Can a Sentence Be Reduced Below the Statutory Mandatory Minimum?

Yes, Rule 35(b)(4) permits a reduction below the statutory mandatory minimum. While Rule 35(b) does not address this scenario specifically, Rule 35(b)(4) makes clear that the sentencing court has the authority to impose a sentence below the mandatory minimum if it finds that the defendant’s substantial assistance warrants such a reduction.

How Often Do Judges Reduce Federal Sentences Under Rule 35(b)?

Sentence reductions under Rule 35(b) are relatively uncommon. According to reports by the United States Sentencing Commission, the most common form of sentence reduction based on substantial assistance is Rule 35(b). According to these reports, sentence reductions under Rule 35(b) account for roughly 10% of all cases that involve substantial assistance.

What can cooperation expose a defendant to beyond a reduced sentence?

The federal government can seek a sentence reduction under Rule 35(b) if a defendant provides “substantial assistance” after sentencing. The federal sentencing guidelines define this term, and in many cases, substantial assistance means cooperating with the government. Cooperation can take a number of different forms, and it will vary depending on the circumstances involved. For example, “substantial assistance” may involve:

• Disclosing information that helps the government identify and prosecute others involved in the same criminal conspiracy, other participants in criminal activity, or individuals who have committed similar criminal offenses.
• Testifying against other individuals in one or more criminal proceedings.
• Participating in undercover or controlled investigative operations. While providing substantial assistance is required in order to seek a sentence reduction under Rule 35(b), substantial assistance alone does not warrant a sentence reduction. Even if a defendant provides substantial assistance, they will not be entitled to a reduced sentence in all cases. In addition, when considering the possibility of cooperating with the government, defendants must also consider the potential risks of cooperation. Two of the biggest risks associated with cooperation are:
• Retaliation risk: Cooperation, especially against violent criminals, will create the risk of retaliation in some cases. This includes the risk of retaliation against the defendant’s family members.
• Additional criminal exposure: If a defendant’s cooperation is unprotected, it can create additional criminal exposure. This is why, even when cooperating, it is important for defendants to work with experienced lawyers to ensure that their cooperation is as risk-free as possible. At Spodek Law Group, we understand the risks involved in cooperating with the government, and we will not advise our clients to take these risks unless it is clearly in their best interests to do so.

Contact a Federal Criminal Defense Attorney

Nothing here is legal advice, and the details of your case matter. Todd Spodek and Spodek Law Group take federal criminal and white collar cases nationwide, from offices in New York, Brooklyn, Queens and Los Angeles. You can reach the firm at 212-300-5196.