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Colorado criminal charge

Failure to register as a sex offender in Colorado

Current through 2026 Colorado legislative session

Failure to register as a sex offender is a criminal offense under Colorado law, defined by C.R.S. § 18-3-412.5. Its classification is not fixed: Colorado assigns a different penalty class depending on the circumstances of the offense. The class that applies — and the sentencing range that follows from it — depends on which statutory variant fits the facts.

Defined by C.R.S. § 18-3-412.5.

What is the penalty for failure to register as a sex offender in Colorado?

Penalties for Failure to register as a sex offender
PenaltyRangeBasisAuthority
Jail / prison12 months to 18 months (Felony failure to register — underlying felony unlawful sexual behavior (first offense) — The person was convicted of, or received a disposition/adjudication for, felony unlawful sexual behavior (or another offense with an underlying factual basis of felony unlawful sexual behavior), and this is not a second or subsequent offense.)presumptiveC.R.S. § 18-1.3-401
Fine1000 usd to 100000 usd (Felony failure to register — underlying felony unlawful sexual behavior (first offense) — The person was convicted of, or received a disposition/adjudication for, felony unlawful sexual behavior (or another offense with an underlying factual basis of felony unlawful sexual behavior), and this is not a second or subsequent offense.)discretionaryC.R.S. § 18-1.3-401
Parole / supervision1 years to 1 years (Felony failure to register — underlying felony unlawful sexual behavior (first offense) — The person was convicted of, or received a disposition/adjudication for, felony unlawful sexual behavior (or another offense with an underlying factual basis of felony unlawful sexual behavior), and this is not a second or subsequent offense.; mandatory parole)mandatoryC.R.S. § 18-1.3-401
Jail / prison1 years to 3 years (Felony failure to register — second or subsequent offense — The person's underlying qualifying offense involves felony unlawful sexual behavior as described in (2)(a) and this is the person's second or subsequent offense of failure to register as a sex offender.)presumptiveC.R.S. § 18-1.3-401
Fine1000 usd to 100000 usd (Felony failure to register — second or subsequent offense — The person's underlying qualifying offense involves felony unlawful sexual behavior as described in (2)(a) and this is the person's second or subsequent offense of failure to register as a sex offender.)discretionaryC.R.S. § 18-1.3-401
Parole / supervision2 years to 2 years (Felony failure to register — second or subsequent offense — The person's underlying qualifying offense involves felony unlawful sexual behavior as described in (2)(a) and this is the person's second or subsequent offense of failure to register as a sex offender.; mandatory parole)mandatoryC.R.S. § 18-1.3-401
Jail / prisonup to 364 days (no statutory minimum) (Misdemeanor failure to register — underlying misdemeanor unlawful sexual behavior — The person was convicted of, or received a disposition/adjudication for, misdemeanor unlawful sexual behavior (or another offense with an underlying factual basis involving misdemeanor unlawful sexual behavior).)discretionaryC.R.S. § 18-1.3-501
Fineup to 1000 usd (no statutory minimum) (Misdemeanor failure to register — underlying misdemeanor unlawful sexual behavior — The person was convicted of, or received a disposition/adjudication for, misdemeanor unlawful sexual behavior (or another offense with an underlying factual basis involving misdemeanor unlawful sexual behavior).)discretionaryC.R.S. § 18-1.3-501

Applies to offenses on/after 2018-07-01.

How is failure to register as a sex offender classified in Colorado?

The classification depends on the circumstances:

Classification variants for Failure to register as a sex offender
VariantClassificationWhen it appliesStatute
Felony failure to register — underlying felony unlawful sexual behavior (first offense)class 6 felonyThe person was convicted of, or received a disposition/adjudication for, felony unlawful sexual behavior (or another offense with an underlying factual basis of felony unlawful sexual behavior), and this is not a second or subsequent offense.18-3-412.5(2)(a)
Felony failure to register — second or subsequent offenseclass 5 felonyThe person's underlying qualifying offense involves felony unlawful sexual behavior as described in (2)(a) and this is the person's second or subsequent offense of failure to register as a sex offender.18-3-412.5(2)(a)
Misdemeanor failure to register — underlying misdemeanor unlawful sexual behaviorclass 1 misdemeanorThe person was convicted of, or received a disposition/adjudication for, misdemeanor unlawful sexual behavior (or another offense with an underlying factual basis involving misdemeanor unlawful sexual behavior).18-3-412.5(3)(a)

Common questions about failure to register as a sex offender in Colorado

Is failure to register as a sex offender a felony or a misdemeanor in Colorado?

It depends on the circumstances: failure to register as a sex offender ranges from a class 1 misdemeanor to a class 5 felony in Colorado under C.R.S. § 18-3-412.5.

Felony failure to register — underlying felony unlawful sexual behavior (first offense): class 6 felony (C.R.S. § 18-3-412.5(2)(a)) · Felony failure to register — second or subsequent offense: class 5 felony (C.R.S. § 18-3-412.5(2)(a)) · Misdemeanor failure to register — underlying misdemeanor unlawful sexual behavior: class 1 misdemeanor (C.R.S. § 18-3-412.5(3)(a))

What are the penalties for failure to register as a sex offender in Colorado?

Penalties for failure to register as a sex offender in Colorado depend on how it is classified — from a class 1 misdemeanor up to a class 5 felony — with the ranges set by C.R.S. § 18-1.3-401 and C.R.S. § 18-1.3-501; the full table of ranges by variant is published on this page.

Which Colorado statute covers failure to register as a sex offender?

Failure to register as a sex offender is governed by C.R.S. § 18-3-412.5 (Failure to register as a sex offender).

Legal terms used in this law

This reference is informational and is not legal advice. Penalty ranges are the statutory classification ranges; sentencing in a specific case depends on its facts and history.