{"id":413936,"date":"2026-09-24T12:14:52","date_gmt":"2026-09-24T17:14:52","guid":{"rendered":"https:\/\/ability-fl-prod.internetbrands.com\/ability-law\/?page_id=413936"},"modified":"2026-09-24T12:11:31","modified_gmt":"2026-09-24T17:11:31","slug":"what-is-a-5k1-1-motion-for-substantial-assistance","status":"publish","type":"page","link":"https:\/\/www.findlaw.com\/criminal\/criminal-procedure\/what-is-a-5k1-1-motion-for-substantial-assistance.html","title":{"rendered":"What Is a 5K1.1 Motion for Substantial Assistance?"},"content":{"rendered":"\n
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What Is a 5K1.1 Motion for Substantial Assistance? <\/h1>\n\n
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\n By Lyle Therese A. Hilotin-Lee, J.D.<\/a> | Legally reviewed by Laura Temme, Esq.<\/a>\n | Last updated\n
\n \n <\/i>\n Legally Reviewed\n <\/summary>\n\n
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This article has been written and reviewed for legal accuracy, clarity, and style by FindLaw\u2019s team of legal writers and attorneys<\/a> and in accordance with our editorial standards<\/a>.<\/em><\/p>\n\n <\/div>\n <\/details>\n\n

\n \n <\/i>\n Fact-Checked\n <\/summary>\n\n
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The last updated date refers to the last time this article was reviewed by FindLaw or one of our contributing authors<\/a>. We make every effort to keep our articles updated. For information regarding a specific legal issue affecting you, please contact an attorney in your area<\/a>.<\/em><\/p>\n\n <\/div>\n <\/details>\n<\/section>\n\n\n

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Key Takeaways<\/h2>\n

A 5K1.1 motion<\/span> is a formal request by a federal prosecutor<\/span> for a reduced sentence when a defendant provides the government with “substantial assistance<\/span>.” This cooperation typically involves giving information that helps investigate or prosecute another person. If granted, this motion is one of the few ways a judge can impose a sentence below the standard federal guidelines, but it comes with significant risks and no guarantees.<\/p>\n\n <\/div>\n <\/div>\n<\/div>\n\n

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A defendant facing federal charges can sometimes earn a sentence reduction<\/span> by\u00a0helping the government investigate or prosecute someone else. This cooperation is recognized through a 5K1.1 motion<\/span>,\u00a0one of the few tools that can reduce the prison time below the standard federal <\/span>sentencing <\/span>guideline<\/span> range<\/span>.<\/p>\n

Cooperating with the government can lead to a lighter sentence, but this process follows strict legal rules. Anyone considering this option, or trying to help a loved one, should speak with a federal criminal defense attorney<\/span><\/a> before talking to investigators.<\/p>\n

What a 5K1.1 Motion Does<\/strong><\/h2>\n

A U.S.S.G. \u00a7 <\/span>5K1.1<\/span><\/a> motion<\/span> of the United States <\/span>Sentencing Guidelines<\/span> notifies the sentencing judge that a defendant has earned credit for cooperating. After the motion is filed according to 28 U.S.C. \u00a7 994(n<\/span>)<\/a>, the district court<\/span> judge can consider a downward departure<\/span> (a sentence shorter than what the standard federal <\/span>sentencing guidelines<\/span> recommend).<\/p>\n

A 5K1.1 motion<\/span> allows a judge to sentence below the advisory<\/em> federal <\/span>sentencing guidelines<\/span>, but it does not, on its own, get below a mandatory minimum sentence<\/span>. Mandatory minimums<\/a> are legally required prison time set by Congress for certain offenses.<\/p>\n

To reduce the sentence below the statutory minimum<\/span>, a separate motion under 18 U.S.C. \u00a7 3553(e<\/span>)<\/a> must be filed by the government. This motion covers relief from mandatory sentences alongside statutory safety valve<\/span> provisions.<\/p>\n

The U.S. Supreme Court confirmed this distinction in\u00a0Melendez v. United States<\/em><\/a>.<\/em> The Court held that a 5K1.1 motion<\/span> does not, by itself, authorize a court to sentence below a statutory floor. The government has to specifically invoke the mandatory minimum statute for that relief to be available.<\/p>\n

Prosecutors often file the 5K1.1 motion<\/span> and the \u00a7 3553(e) motion together when a mandatory minimum applies. Without the second motion, the judge cannot go below the statutory minimum<\/span>, no matter how valuable the cooperation was.<\/p>\n

What Counts as Substantial Assistance?<\/strong><\/h2>\n

Substantial assistance<\/span> involves helping the government investigate or prosecute another person. It does not relate to the defendant’s own charges, but instead focuses on what the defendant knows about someone else’s criminal conduct, and whether that knowledge actually moves a separate case forward.<\/p>\n

There are several ways a defendant can provide this kind of help:<\/p>\n