What Is Missouri’s Suspended Imposition of Sentence Statute?

A suspended imposition of sentence in Missouri, usually called an SIS, is a disposition in which the judge accepts your guilty plea or finding of guilt but holds off on entering a conviction or imposing a sentence. You serve a period of probation instead. If you complete that probation successfully, no conviction is ever entered on your record under Missouri law, which is why the SIS is one of the most sought-after outcomes in Missouri criminal cases. The arrangement comes with real conditions, and with federal consequences that catch people off guard.

How an SIS Works

The process starts with a guilty plea or a finding of guilt at trial. The judge then suspends the step of actually imposing a sentence and places you on probation under conditions the court considers necessary to prevent future violations of law.¹ Because no sentence is formally imposed and no conviction is entered, the disposition is not legally a conviction under Missouri law.²

The plea happens. The paperwork that stamps someone “convicted” does not. Finish probation and the case closes without a conviction. Violate probation and the judge can reopen the matter and impose any sentence that was originally available for the offense.

SIS Compared to a Suspended Execution of Sentence

People confuse the SIS with Missouri’s other common probation arrangement, the Suspended Execution of Sentence, or SES. They sound alike and work very differently.

With an SES, the judge enters a conviction and imposes a specific sentence, then suspends execution of that sentence and places you on probation. The conviction goes on your record immediately and stays there even if probation goes perfectly. If probation is later revoked, the court carries out the specific sentence it already imposed.³

With an SIS, no conviction is entered and no sentence is set. If probation is revoked, the court can impose any sentence available under the law for the offense, not just a pre-set one.³ That wider sentencing range on revocation is the price of a cleaner record if you succeed.

Who Can Receive an SIS

Granting an SIS is entirely within the judge’s discretion. No defendant has a right to one. Judges weigh criminal history, the circumstances of the offense, rehabilitation potential, input from prosecution and defense, and any victim statements. First-time offenders facing nonviolent charges like minor drug possession or property crimes are the most common recipients.

Missouri law flatly bars an SIS for certain serious offenses. Under Section 557.045, you are ineligible for probation, SIS, or SES if you are found guilty of:⁴

Second-degree murder where you knowingly caused the death of another person.
A dangerous felony where you have a prior class A or B felony or a prior dangerous felony conviction.
A dangerous felony involving a deadly weapon, regardless of criminal history.
A dangerous felony against a law enforcement officer, firefighter, or emergency responder acting in the line of duty.

Missouri defines “dangerous felony” broadly, so many violent-crime defendants are automatically excluded.⁵

DWI Rules Are Stricter

Driving while intoxicated cases follow their own SIS rules under Section 577.010. A first-time DWI offender can receive an SIS, but only if the court imposes at least two years of probation. If your blood alcohol concentration was 0.15% or higher and a DWI court or treatment program is available in that circuit, you must complete that program as a condition of the SIS. Repeat DWI offenders are shut out entirely: anyone classified as a prior, persistent, aggravated, chronic, or habitual offender cannot receive an SIS for DWI.⁶

Probation Length and Conditions

When the court grants an SIS, it sets a specific probation term within these ranges:⁷

Felony: one to five years.
Misdemeanor: six months to two years.
Infraction: six months to one year.

If you violate conditions, the court can extend the original term by up to one additional year beyond the maximum, so a five-year felony probation can stretch to six.⁷

Specific conditions are up to the judge and can include community service, victim restitution, substance abuse treatment, offender treatment programs, work release, and community-based residential programs.¹ Supervised probationers also pay a monthly supervision fee of up to $60.⁸

What a Probation Violation Costs

Missed appointments, failed drug tests, skipping required treatment, or new criminal charges can all trigger a revocation hearing. Before revoking, the court must give you notice and an opportunity to be heard on whether a violation occurred and whether revocation is the right response.³

If the court finds a violation, it can modify or extend probation, place you on a second term of probation, or revoke probation entirely and impose any sentence that was originally available for the underlying offense. That last option is where the SIS bargain can hurt. Because no sentence was ever set, the full statutory sentencing range is on the table. The court can reduce a prison or jail term by all or part of the time you spent on probation, but credit is discretionary, not automatic.³

What Shows Up on a Background Check

The record implications shift sharply depending on where you are in the process.

While Probation Is Active

During SIS probation, the case is an open record on Missouri’s criminal history system. The Missouri State Highway Patrol classifies records containing a suspended imposition of sentence during the probation period as open-record information, meaning they appear on standard criminal background checks.⁹ Court records on Case.net are also publicly accessible. Employers, landlords, and others running background checks will likely see the charge and the SIS disposition while probation is ongoing.

After Successful Completion

Once probation ends successfully, the SIS becomes a closed record on the state criminal history system and is no longer included in standard open-record background checks.⁹ Because no conviction was ever entered, you can truthfully say you were not convicted of the offense.²

The arrest record and court proceedings still exist. Certain government agencies and authorized entities can access closed records, and the information may linger in third-party background check databases that captured it while the record was open. Fully clearing the slate requires expungement.

Where an SIS Still Counts Against You

An SIS is not a conviction under Missouri state law, but federal agencies use their own definitions. Whether an SIS counts as a “conviction” depends entirely on which federal law is asking.

Immigration

Federal immigration law treats a conviction as any formal judgment of guilt, or any accepted guilty plea paired with some form of punishment or restraint. An SIS meets that definition because it involves a guilty plea followed by court-supervised probation. The Missouri State Public Defender’s Office puts it plainly: an SIS is a conviction for immigration purposes.¹⁰ A noncitizen who accepts an SIS for a deportable offense faces the same removal consequences as someone with a traditional conviction.

Commercial Driver’s Licenses

Federal CDL regulations define “conviction” to include any plea of guilty accepted by the court, regardless of whether the penalty is suspended or probated.¹¹ An SIS for a disqualifying traffic offense such as DWI therefore counts as a conviction for CDL purposes and can result in license disqualification.¹²

Firearms

Federal law bars anyone convicted of a crime punishable by more than one year in prison from possessing firearms.¹³ The Gun Control Act defers to state law on what counts as a conviction, providing that “what constitutes a conviction of such a crime shall be determined in accordance with the law of the jurisdiction in which the proceedings were held.”¹⁴ Because Missouri does not treat a completed SIS as a conviction, a successfully completed felony SIS generally should not trigger the federal firearms ban. Anyone in this situation should still verify with a firearms attorney before purchasing or possessing a weapon.

Professional Licensing

Missouri licensing boards may still require disclosure of an SIS. Application questions asking about arrests, guilty pleas, or “criminal history” rather than just “convictions” can sweep in an SIS. Missouri’s Fresh Start Act, codified at Section 324.012, lets individuals petition a licensing authority for a pre-determination of whether their record would disqualify them from licensure.

Sex Offender Registration

Missouri’s registration statute reaches anyone who has been convicted of, found guilty of, or pleaded guilty to qualifying offenses.¹⁵ Because an SIS requires a guilty plea or a finding of guilt, a person who receives an SIS for a registrable sex offense must still register. The SIS does not avoid that obligation.

Clearing the Record Afterward

Finishing SIS probation keeps a conviction off your record, but the arrest, the charge, and the court file still exist. Expungement under Section 610.140 is the process for sealing those records so they no longer appear on any background check.¹⁶

You cannot file right away. The waiting period runs at least three years after completing probation for a felony, and at least one year for a misdemeanor, municipal violation, or infraction.¹⁶

Missouri also caps lifetime expungements at no more than three misdemeanor offenses or ordinance violations carrying potential imprisonment, no more than two felony offenses, and unlimited infractions.¹⁶

Not every SIS qualifies. The statute excludes class A felonies, dangerous felonies, offenses requiring sex offender registration, felonies where death is an element, felony assault, domestic assault, felony kidnapping, and all intoxication-related traffic or boating offenses.¹⁶ That last category matters: even a first-offense DWI that received an SIS cannot be expunged. Expungement is also not automatic. You petition the court in the county where the case was filed, pay a $250 filing fee that the court can waive, and the court evaluates the offense, the time elapsed, and your conduct since probation ended before deciding whether to grant it.

1
Missouri Revisor of Statutes. Missouri Revised Statutes Section 559.021 – Conditions of Probation
2
Missouri Department of Corrections. Rules and Regulations Governing the Conditions of Probation, Parole, and Conditional Release
3
Missouri Revisor of Statutes. Missouri Revised Statutes Section 559.036 – Duration of Probation, Revocation
4
Missouri Revisor of Statutes. Missouri Revised Statutes Section 557.045 – Ineligibility for Probation, SIS, SES, or Conditional Release, Certain Offenses
5
Missouri Revisor of Statutes. Missouri Revised Statutes Section 556.061 – Code Definitions
6
Missouri Revisor of Statutes. Missouri Revised Statutes Section 577.010 – Driving While Intoxicated
7
Missouri Revisor of Statutes. Missouri Revised Statutes Section 559.016 – Terms of Probation, Extension
8
Cornell Law Institute. 14 CSR 80-5.020 – Intervention Fee Procedure
9
Missouri State Highway Patrol. Criminal Record Check
10
Missouri State Public Defender. Ethical Obligations When Representing Immigrant Clients
11
eCFR. 49 CFR 383.5 – Definitions
12
eCFR. 49 CFR 383.51 – Disqualification of Drivers
13
Bureau of Alcohol, Tobacco, Firearms and Explosives. Identify Prohibited Persons
14
GovInfo. 18 USC 921 – Definitions
15
Missouri Revisor of Statutes. Missouri Revised Statutes Section 589.400 – Registration of Certain Offenders
16
Missouri Revisor of Statutes. Missouri Revised Statutes Section 610.140 – Expungement of Certain Criminal Records