Third-degree criminal sexual conduct is a felony charge involving sexual penetration under specific aggravating circumstances — most often the victim’s age, an incapacity that prevents consent, the offender’s position of authority, or a level of force or coercion that falls short of what first-degree charges require. A conviction typically brings up to 15 years in prison, fines that can reach $30,000, mandatory sex offender registration for decades, and a lasting set of restrictions on firearms, travel, housing, and work.
Which States Use This Charge
The “criminal sexual conduct” label with numbered degrees is not used everywhere. Only a handful of states, including Michigan, Minnesota, and South Carolina, classify sex offenses this way. Most states use different labels: New York uses “rape” and “criminal sexual act” with its own degree system, Illinois uses “criminal sexual assault” and “aggravated criminal sexual assault,” and Texas uses “sexual assault” with no degrees at all. If you searched for this term, you are almost certainly dealing with the law of a state that uses the degree structure, and the specific statute in that state controls the exact elements and sentence.
The patterns below reflect common features across the states that use this classification. The specific numbers, age cutoffs, and defenses in your case come from your state’s statute.
What the Prosecution Has to Prove
Two things have to be shown, and both are required. First, that sexual penetration occurred. Second, that at least one specific aggravating circumstance existed at the time. Neither alone supports a third-degree charge.
Sexual Penetration
The legal definition is broader than most people expect. It covers any intrusion, however slight, of a body part or object into another person’s genital or anal opening, and it covers oral sex. The act does not need to be completed; any degree of intrusion is enough.
The Aggravating Circumstance
This is where third-degree CSC gets its shape. The exact list varies by state, but the common categories are:
- The victim’s age. Commonly a teenager between 13 and 15 who cannot legally consent. States set different age ranges and often include close-in-age exceptions when the parties are near-peers.
- Mental or physical incapacity. The victim could not understand or control what was happening because of a mental disability, developmental condition, or physical helplessness, and the offender knew or should have known.
- Force or coercion, but short of the weapons or serious injury that would make the charge first-degree.
- A position of authority or trust that the offender exploited. Teachers, coaches, counselors, and school employees are common examples.
- A close family relationship by blood or marriage, where a separate incest statute does not already cover the conduct.
The prosecution only needs one of these to fit. Where the facts fit more than one, prosecutors typically charge under whichever is easiest to prove.
Where Consent Fits, and Where It Doesn’t
Consent means a voluntary, affirmative, freely given agreement. Silence and the absence of resistance are not consent. It can be withdrawn at any point, and continuing after withdrawal makes the act non-consensual.
Some people cannot legally consent regardless of what they say or do. That includes anyone who is unconscious, asleep, or too impaired by drugs or alcohol to understand what is happening, and minors below the age of consent. Consent obtained through threats, physical force, or coercion is not valid either.
In third-degree cases, the consent question often turns on age or incapacity. The prosecution does not always need to prove the victim said no. If the victim falls into a category of people who cannot legally consent, the circumstance itself establishes the absence of consent.
Penalties
Third-degree CSC is a felony in every state that uses the label. Sentences vary by jurisdiction and by the facts, but the general pattern includes:
- Prison time up to a maximum of about 15 years. Some states impose shorter maximums for narrow subcategories, such as small age-gap cases.
- Fines that can reach $30,000 or more, depending on the state.
- No probation in some states, meaning a prison sentence cannot be suspended for an adult offender.
- Restitution to the victim for costs like therapy, medical treatment, and lost wages.
Criminal history matters. A first-time offender may land closer to the low end of the guidelines; someone with prior sex offense convictions faces significantly harsher treatment, potentially including enhanced mandatory minimums under repeat-offender statutes.
Sex Offender Registration
Conviction triggers mandatory sex offender registration. The federal Sex Offender Registration and Notification Act (SORNA) sets a baseline three-tier system, and every state runs its own registry that incorporates or exceeds those requirements.1Office of Justice Programs. SORNA Requirements
Under the federal framework:
- Tier I requires 15 years of registration.
- Tier II requires 25 years.
- Tier III is lifetime.
Third-degree CSC involving penetration is often classified as Tier II or Tier III depending on the state and the facts, which puts registration in the 25-year to lifetime range.2Federal Register. Registration Requirements Under the Sex Offender Registration and Notification Act Registration means providing your home address, employment, and photograph to law enforcement and updating that information whenever it changes. Failure to register or update is a separate federal crime under 18 U.S.C. § 2250.1Office of Justice Programs. SORNA Requirements
Life After the Sentence
The consequences that outlast the prison term are often the ones that reshape daily life the most.
Firearms
Federal law permanently bars anyone convicted of a crime punishable by more than one year in prison from possessing firearms or ammunition. Third-degree CSC clears that threshold easily, so conviction means a lifetime federal firearms ban.3Office of the Law Revision Counsel. 18 USC 922
Passports
Under International Megan’s Law, registered sex offenders whose victims were minors must self-identify as a covered sex offender when applying for a passport. The State Department prints an identifier inside the passport book that reads: “The bearer was convicted of a sex offense against a minor, and is a covered sex offender pursuant to 22 USC 212b(c)(1).” Passport cards are not available to covered sex offenders at all, and the government can revoke a passport that lacks the identifier.4U.S. Department of State. Passports and International Megan’s Law
Housing and Work
Residence restrictions in many states prohibit living within a set distance of schools, daycare centers, parks, and playgrounds. Any job involving contact with children is effectively closed off, including work at schools, childcare facilities, and libraries. Careers that require professional licensure in healthcare, law enforcement, or education are typically barred as well.
Defenses That May Apply
A charge is not a conviction. The defenses that come up in third-degree CSC cases depend on which aggravating circumstance the prosecution is relying on:
- Consent, when the alleged victim was a legal adult capable of consenting. This defense is not available when the charge is based on the victim’s age or incapacity, because those categories exist precisely because legal consent is impossible.
- Mistaken identity, supported by DNA, alibi evidence, or surveillance footage.
- Insufficient evidence. The prosecution has to prove every element beyond a reasonable doubt, and either penetration or the aggravating circumstance can be challenged.
- A close-in-age exception, where the state’s statute provides an affirmative defense when the offender and victim are near-peers. The exact age gap varies.
Anyone facing a third-degree CSC charge should get a criminal defense attorney involved as early as possible. The exposure includes years of prison, decades on a public registry, and permanent limits on firearms, travel, housing, and work, and the earliest decisions in a case often shape how it ends.