California’s felony sentencing guidelines give the judge three preset prison terms for most offenses — a lower, middle, and upper term — with the middle term as the starting point. From there, the sentence moves up or down based on aggravating and mitigating facts, gets extended by enhancements for things like firearms or great bodily injury, may be doubled or pushed to life under the Three Strikes Law, and is finally reduced by custody credits or replaced with probation or supervised release. What a defendant actually serves depends on all of these layers working together.
The Triad: Lower, Middle, and Upper Terms
Under California’s Determinate Sentencing Law, most felony statutes list three specific prison terms rather than an open range. A given offense might carry a triad of two, three, or four years. That set of three is the whole menu — the judge picks one.1California Legislative Information. California Penal Code 1170
The middle term is presumed. A judge cannot exceed it unless aggravating facts have been either stipulated to by the defendant or found true beyond a reasonable doubt by a jury (or by the judge in a bench trial). SB 567, effective in 2022, put that proof requirement in place; before then, a judge could impose the upper term based on the judge’s own findings alone. A defendant can now ask that the aggravating-circumstances proceeding be separated from the main trial.2California Legislative Information. SB-567 Criminal Procedure Sentencing
What Moves a Sentence Up or Down
The choice among the three terms turns on aggravating and mitigating circumstances laid out in the California Rules of Court.
Aggravating Circumstances
Aggravating factors related to the crime include great violence or cruelty, being armed, a particularly vulnerable victim, and planning or sophistication. Factors related to the defendant include a pattern of increasingly serious prior convictions, being on probation or parole at the time of the new offense, and poor past performance on supervision.3Judicial Branch of California. California Rules of Court Rule 4.421 – Circumstances in Aggravation Any of these must be admitted or proven beyond a reasonable doubt before the upper term can be imposed.1California Legislative Information. California Penal Code 1170
Mitigating Circumstances
Mitigating factors point toward the lower term. On the crime side: a passive or minor role, provocation by the victim, or unusual circumstances unlikely to recur. On the defendant side: no meaningful criminal record, a mental or physical condition that reduced culpability, or an early acknowledgment of wrongdoing.4Judicial Branch of California. California Rules of Court Rule 4.423 – Circumstances in Mitigation
The Lower Term Presumption
California law goes further for certain defendants. The court must impose the lower term if any of the following contributed to the offense: psychological, physical, or childhood trauma (including abuse, neglect, or sexual violence); the defendant was under 26 at the time of the crime; or the defendant was a victim of intimate partner violence or human trafficking. The only escape from this presumption is a finding that aggravating circumstances outweigh mitigating ones and that the lower term would be contrary to the interests of justice.5California Legislative Information. California Penal Code 1170
Wobblers: Felony or Misdemeanor
Many California crimes can be charged either way. A felony triggers the triad and possible prison or county jail time; a misdemeanor caps out at one year in county jail. Common wobblers include assault with a deadly weapon, grand theft, forgery, and certain domestic violence offenses.
A wobbler can be reduced at several points. The prosecutor can file it as a misdemeanor. The judge can declare it a misdemeanor before trial, at sentencing (if the sentence is something other than state prison), or when granting probation. A defendant on probation can also petition later for reclassification.6California Legislative Information. California Penal Code 17
Enhancements That Add Time
Enhancements are additional years stacked on top of the base sentence. They have to be charged in the complaint or indictment and either admitted or proven to the jury. Causing great bodily injury during a felony adds three consecutive years.7California Legislative Information. California Penal Code 12022.7
Firearm enhancements attached to specified serious felonies are far steeper:
- Personal use of a firearm adds 10 years. The firearm does not need to be loaded or operable.
- Intentionally firing a firearm adds 20 years.
- Firing a firearm and causing great bodily injury or death adds 25 years to life.
These terms run consecutively to the base sentence.8California Legislative Information. California Penal Code 12022.53
When a Judge Can Dismiss an Enhancement
Penal Code 1385 requires the court to dismiss an enhancement when doing so serves the interests of justice, and it lists mitigating circumstances the judge should weigh heavily. Those include cases where multiple enhancements are alleged (in which all but one should be dismissed), where the total sentence with enhancements would exceed 20 years, where the offense is connected to mental illness or childhood trauma, or where the enhancement rests on a prior conviction more than five years old.9California Legislative Information. California Penal Code 1385
The Three Strikes Law
Prior convictions for serious or violent felonies count as “strikes” and drive up the sentence on any new felony conviction. One prior strike doubles the sentence that would otherwise apply to the new offense.10California Legislative Information. California Penal Code 667 Two or more prior strikes trigger an indeterminate sentence of 25 years to life, but only if the new felony is itself serious or violent.11California Legislative Information. California Penal Code 1170.12
The requirement that the third strike be serious or violent came from Proposition 36, passed by voters in 2012. Before that, any felony could trigger 25 to life. Exceptions remain for certain drug offenses, sex crimes, and cases involving firearm use or intent to cause great bodily injury.12Legislative Analyst’s Office. Proposition 36 Three Strikes Law Sentencing for Repeat Felony Offenders
A judge can also strike a prior strike under Penal Code 1385, known as a Romero motion. The court weighs the defendant’s background, character, and the nature of the current offense to decide whether treating the case under Three Strikes would produce an unjust result.9California Legislative Information. California Penal Code 1385
Sentencing on Multiple Convictions
When a defendant is convicted of more than one felony in the same case, the judge decides whether the sentences run concurrently or consecutively. Consecutive sentences use a specific formula. The longest single sentence, plus any enhancements attached to it, becomes the “principal term.” Every other consecutive count becomes a “subordinate term,” computed as one-third of that offense’s middle term plus one-third of its specific enhancements. The total is the principal term, all subordinate terms, and any additional enhancements combined.13California Legislative Information. California Penal Code 1170.1
How Much Time Someone Actually Serves
The announced sentence is rarely the time spent behind bars. Custody credits reduce it, sometimes by half.
Presentence and Conduct Credits
Time in jail before sentencing counts against the sentence. On top of day-for-day credit for actual custody, defendants earn conduct credits for following rules and performing assigned work. Under Penal Code 4019, the formula gives four days of credit for every two days of actual custody, so a defendant who behaves in county jail serves roughly half the credited time.14California Legislative Information. California Penal Code 4019
The 15 Percent Cap for Violent Felonies
Defendants convicted of violent felonies can earn no more than 15 percent credit against their sentence, meaning they serve at least 85 percent of the term imposed. The cap applies to both state prison time and presentence county jail time.15California Legislative Information. California Penal Code 2933.1 The gap between roughly 50 percent time served on a non-violent felony and 85 percent on a violent one is why the “violent” classification under Penal Code 667.5(c) matters so much at sentencing.
Felony Probation
A felony conviction does not always mean custody. The court can grant felony probation with conditions such as restitution, counseling, community service, search terms, and sometimes a short stretch in county jail as part of the grant. For most felonies, the maximum probation term is two years. Violent felonies can carry supervision up to the maximum possible sentence, and certain qualifying theft crimes can carry up to three years.16California Legislative Information. California Penal Code 1203.1
County Jail Felonies and Split Sentences
Many felonies are served in county jail rather than state prison. Under Penal Code 1170(h), a felony that is not serious, not violent, and does not require sex offender registration is punishable in county jail. If the underlying statute doesn’t set a length, the default triad is 16 months, two years, or three years.17California Legislative Information. California Penal Code 1170 Subdivision h
For these sentences, the law prefers “split sentences.” Unless the judge finds it inappropriate, the final portion of the term must be suspended and served as mandatory supervision. A three-year sentence, for example, might be split into 18 months in jail and 18 months of supervised release managed by the county probation department. During mandatory supervision, the defendant earns only actual-day credit, not the enhanced rate.17California Legislative Information. California Penal Code 1170 Subdivision h
Release From State Prison: PRCS or Parole
Defendants who serve their time in state prison and are not classified as serious, violent, or high-risk sex offenders are released to Post-Release Community Supervision. PRCS lasts up to three years and is run by the county probation department; violations are handled locally through the courts, not by the state Board of Parole Hearings.18California Legislative Information. California Penal Code 3451 Defendants convicted of serious or violent felonies, third-strikers, and registered sex offenders remain under state parole supervision.
Mandatory Fines and Victim Restitution
Every California felony conviction carries mandatory financial obligations. The court must impose a restitution fine of at least $300 and up to $10,000, waivable only on a finding of compelling and extraordinary reasons stated on the record.19California Legislative Information. California Penal Code 1202.4
If a victim suffered economic loss, the court must separately order full victim restitution covering actual damages, including medical bills, lost wages, property damage, and funeral costs. The defendant’s ability to pay does not reduce the amount, and the order is enforceable as a civil judgment through wage garnishment and other collection remedies. Victim restitution takes priority over all other fines and fees.19California Legislative Information. California Penal Code 1202.4