Part of our complete guide to Rule 35(b) sentence reductions in federal court.
One of the most common misconceptions about Rule 35(b) is the belief that any opportunity for a sentence reduction disappears exactly one year after sentencing.
Families often hear that a Rule 35 motion must be filed within one year and conclude that all possibilities have expired once that deadline passes.
The reality is more nuanced.
Rule 35 contains two separate provisions governing substantial-assistance motions. One applies to motions filed within one year after sentencing. The other permits certain motions to be filed after the one-year period has expired.
Understanding the difference between these provisions is essential because many Rule 35 questions arise precisely when a defendant has already been serving a sentence for more than a year.
Rule 35(b)(1): Motions Filed Within One Year of Sentencing
The first provision is Rule 35(b)(1).
Under this subsection, the government may move for a sentence reduction within one year after sentencing if the defendant has provided substantial assistance in investigating or prosecuting another person.
This is the situation most people think of when discussing Rule 35(b).
A defendant provides assistance.
The government evaluates that assistance.
If the government concludes that the assistance was substantial, it may file a motion asking the court to reduce the sentence.
The one-year provision is often used when investigators can evaluate the usefulness of the assistance relatively quickly.
For example:
- Information leads to arrests;
- Investigators verify important facts;
- Assets are recovered;
- Indictments are returned;
- A defendant provides testimony in a related proceeding.
When the government can assess the value of the cooperation within the first year after sentencing, Rule 35(b)(1) frequently provides the vehicle for seeking a reduction.
Why the One-Year Rule Exists
Congress recognized that substantial assistance is most often evaluated within a relatively short period after sentencing.
The one-year provision allows prosecutors to reward cooperation without requiring lengthy litigation over timing issues.
In many cases, both prosecutors and defendants know within months whether the assistance has proven valuable.
But not always.
And that is why Rule 35(b)(2) exists.
Rule 35(b)(2): Motions Filed More Than One Year After Sentencing
Rule 35(b)(2) addresses situations in which substantial assistance cannot reasonably be evaluated within the first year after sentencing.
The rule recognizes a simple reality:
Investigations do not always move on a predictable timetable.
Some cases take years to develop.
Witnesses may not testify for a long time.
Information may not become useful until investigators discover additional evidence.
As a result, Rule 35(b)(2) permits certain substantial-assistance motions to be filed after the one-year period has expired.
Situations That May Fall Within Rule 35(b)(2)
Although every case depends on its facts, several recurring situations commonly arise.
Information That Was Not Useful Within the First Year
A defendant may provide information shortly after sentencing.
At the time, investigators cannot use it effectively.
Months or years later, another investigation develops and the information suddenly becomes important.
What once appeared insignificant now has substantial value.
Rule 35(b)(2) was designed in part to address this situation.
Information Whose Importance Was Not Reasonably Apparent Earlier
Sometimes information is known to investigators but its significance is not immediately understood.
Only later do investigators realize that the information connects to another target, another conspiracy, or another criminal scheme.
The value of the information becomes clear only with the passage of time.
Information That Could Not Reasonably Have Been Acted Upon Earlier
In some cases, circumstances prevent law enforcement from using the information during the first year.
The investigation may be ongoing.
Other witnesses may still be developing.
Prosecutors may be waiting for additional evidence.
Once the information becomes actionable, a Rule 35(b)(2) motion may become appropriate.
Why Families Often Misunderstand the One-Year Rule
Many internet discussions simplify Rule 35 by stating:
The government has one year to file.
That statement is only partially correct.
The government certainly may file within the first year under Rule 35(b)(1).
But Rule 35(b)(2) recognizes that substantial assistance sometimes cannot be fully evaluated within that timeframe.
As a result, the mere fact that more than one year has passed does not automatically mean that Rule 35 relief is unavailable.
The critical question is not simply:
Has one year passed?
The critical question is:
Does the assistance fit within one of the circumstances contemplated by Rule 35(b)(2)?
Delays Do Not Necessarily Mean Nothing Is Happening
Families often become discouraged when months pass without hearing anything about a Rule 35 motion.
That reaction is understandable.
Yet delays frequently occur for legitimate reasons.
Investigators may still be:
- Corroborating information;
- Conducting surveillance;
- Preparing indictments;
- Coordinating with another district;
- Waiting for a trial date;
- Developing additional witnesses.
In some cases, prosecutors intentionally wait until they can fully assess the value of the defendant’s assistance before deciding whether to seek a reduction.
For that reason, a delay does not necessarily indicate that the government has rejected the cooperation.
The One-Year Rule Does Not Create an Automatic Right
Another common misconception is that substantial assistance automatically requires the government to file a motion before the one-year period expires.
Rule 35 creates a mechanism through which the government may seek a reduction.
It does not create an automatic entitlement to a motion.
The government’s evaluation of the assistance remains central to the process both before and after the one-year mark.
Practical Questions Families Should Ask
When more than a year has passed since sentencing, families often focus exclusively on the calendar.
A more productive inquiry is usually:
- What assistance was provided?
- When was it provided?
- When did it become useful?
- Has the government had an opportunity to evaluate it?
- Is the underlying investigation still ongoing?
Those questions often provide more meaningful insight than simply counting the number of months that have elapsed since sentencing.
The Key Takeaway
The one-year deadline is important, but it is not the end of the analysis.
Rule 35(b)(1) governs substantial-assistance motions filed within one year after sentencing. Rule 35(b)(2) permits certain motions to be filed after the one-year period has expired when the value or usefulness of the assistance could not reasonably be assessed earlier.
Because the government controls whether a Rule 35 motion is filed, the next question naturally arises: what happens when the defendant believes substantial assistance was provided, but the government chooses not to file a motion?

