Most New Mexicans first hear about the Earned Meritorious Deductions Act when a family member gets sentenced, and the conversation turns to a familiar question: how long are they actually going to be inside? It is almost never the same as the number the judge said out loud.
A nine-year sentence is not nine years for everyone. For one person it is closer to four and a half. For another it is closer to eight. The difference usually comes down to a single line buried in the judgment and sentence, and to a statute most people have never heard of: New Mexico's Earned Meritorious Deductions Act, found in N.M. Stat. Ann. § 33-2-34,. Everybody calls it "good time."
This article walks through how it works, where the fight happens, and what changed in 2025. It is general information, not advice about any particular case.
First, the basic idea
“Good time” is credit a person earns off a prison sentence for participating in programs and staying out of trouble while inside the Department of Corrections. It is not a reward the judge hands out, nor is it something the Parole Board grants. It is administered by the New Mexico Corrections Department.
New Mexico courts have said for decades that computing good time is an administrative job, not a judicial one. See State v. Aqui, 104 N.M. 345, 721 P.2d 771 (N.M. 1986). Your sentencing judge sets the number of years. The Department decides, month by month, how much comes off pursuant to statute and inmate participation.
What the judge does control is the category the sentence falls into. And that category is worth years of a person’s life.
Four days a month, or thirty days a month: Which is Which?
New Mexico Statutes Section 33-2-34(C) sets two standards for Good Time:
Four days per month if the person is confined for a serious violent offense.
Thirty days per month if the person is confined for a nonviolent offense, which the statute defines as anything that is not a serious violent offense. This is also known as “day-for-day” credit.
Thirty days a month has historically worked out to something close to day-for-day credit, meaning roughly half the sentence will be served if sentenced to a nonviolent offense. If you are sentenced to a serious violent offense, it works out to four days a month, or roughly 85% of the sentence must be served. The eighty-five percent figure has a history: the Court of Appeals traced the "serious violent offense" scheme back to federal truth-in-sentencing grant conditions from the 1990s in State v. Morales, 131 N.M. 530, 39 P.3d 747, 2002 NMCA 16, 2002-NMCA-016, 2002 NMCA 016 (N.M. Ct. App. 2001).
To put it in plain English, for a nine-year sentence, the difference between the two categories is on the order of three and a half years. That is the whole ball game, and it is decided at sentencing. While the Court sentences the defendant, the Corrections Department does the arithmetic and applies its own rules and release-date calculations. Nobody should treat a back-of-the-envelope number as a release date.
What makes something a "serious violent offense"
Section 33-2-34(N)(4) does this in two parts, and the two parts work very differently.
The automatic list. Subparagraphs (a) through (n) name offenses that are serious violent offenses as a matter of law. Second degree murder. Voluntary manslaughter. Third degree aggravated battery, including against a household member. First degree kidnapping. First and second degree criminal sexual penetration. Second and third degree criminal sexual contact of a minor. First and second-degree robbery. Second degree aggravated arson. Shooting at a dwelling or occupied building. Shooting at or from a motor vehicle. Aggravated battery upon a peace officer, assault with intent to commit a violent felony upon a peace officer, and aggravated assault upon a peace officer.
If the conviction is on that list, the four-day rate applies. There is no judicial finding to make and nothing to argue about.
The judge's-call list. Subparagraph (o) is different, and it is where the work is. It names another set of offenses to include involuntary manslaughter, fourth degree aggravated assault, third and fourth degree aggravated stalking, second degree kidnapping, first, second and third degree child abuse, third and fourth degree criminal sexual penetration, third degree robbery, homicide by vehicle or great bodily harm by vehicle, battery upon a peace officer, and others that count as serious violent offenses only "when the nature of the offense and the resulting harm are such that the court judges the crime to be a serious violent offense." For these offenses, the judge must actually decide on the record.
What changed in 2025
New Mexico Statutes Section 33-2-34 was amended twice in 2025. A few things in the current text are worth knowing about.
Deductions are awarded up front. Subsection B now provides that meritorious deductions "shall be awarded for the remainder of the sentence, after pre-sentence confinement has been deducted, upon admission" to a facility. That is a different structure from the older month-by-month accrual model. Practically, it shifts the emphasis from earning credit forward to keeping the credit you were given.
And they can be taken away. Subsections A, D, and H spell out how deductions are lost, which include a failure to actively participate in approved programs, disciplinary segregation, disobeying a labor order, and, notably, being confined for a serious violent offense during the first sixty days after intake.
Lockdowns are addressed. Subsection E provides that if a person's participation in programs is interrupted by a facility lockdown, deductions may not be taken away unless the warden or the warden's designee determines the person's own conduct contributed to the lockdown. Anyone who has had a loved one in a New Mexico facility during an extended lockdown will understand why that provision exists.
Parole revocation. Subsection C(3) addresses people confined following the revocation of parole, providing that deductions are awarded commensurate with the classification of the offense.
Which version applies? Courts apply the version of the statute in effect when the offense was committed. The Court of Appeals said exactly that in a footnote in Woods, applying the 2015 version to conduct that predated the amendments. If the offense date is before June 20, 2025, the older text is likely the relevant one. That is worth confirming on a case-by-case basis.
Programs and lump-sum awards
Additionally, Subsection F provides one-time awards on top of the monthly deductions:
Thirty days for completing an approved vocational, substance abuse, or mental health program. Ninety days for a high school equivalency credential. One hundred twenty days for an associate's degree. One hundred fifty days for a bachelor's degree or a graduate qualification. And a discretionary award for a heroic act of saving life or property, or for extraordinary conduct benefiting the state or the public.
Subsection G caps these at one year per award and one year total in any twelve-month period.
If you are on the outside and wondering what family members can do to help an inmate, this is one of the few things that genuinely moves the needle: encourage the programs. Encourage the inmate to obtain a GED. The credits are statutory, and they are among the very few levers still available after sentencing.
What good time does not do
It does not touch a life sentence. Subsection I says the statute cannot be read to provide eligibility to earn deductions from a sentence of life imprisonment or life without parole. The Supreme Court reached the same conclusion under earlier versions of the statute in Compton v. Lytle, 134 N.M. 586, 81 P.3d 39, 2003 NMSC 31, 2003-NMSC-031, 2003 NMSC 031 (N.M. 2003), holding that a person serving a life sentence is not eligible for a parole hearing until thirty years have actually been served, good-time credits notwithstanding.
Parole still waits on the other side. Good time moves up the date a person walks out of the facility. It does not eliminate the parole term that follows. Under N.M. Stat. Ann. § 31-21-10, a person convicted of a first-, second-, or third-degree felony serves a two-year parole term after the prison sentence; a fourth-degree felony carries a one-year term. A life sentence carries a minimum five-year parole period. Section 33-2-34(O) does allow deductions of up to thirty days per month against a parole term for a compliant parolee, on the parole officer's recommendation and with the Parole Board's approval — but sex offenders subject to Section 31-21-10.1 are excepted.
County jail is a different animal entirely. Time in a county jail is governed by a completely different statute, N.M. Stat. Ann. § 33-3-9. There, the sheriff or jail administrator, with the committing or presiding judge's approval, may grant deductions capped at one-half of the original sentence. Importantly, no good time accrues at all on the mandatory portion of a DWI or driving-on-a-revoked-license sentence.
And what’s given can be taken back. Good time can be forfeited, but not arbitrarily. In Brooks v. Shanks, 118 N.M. 716, 885 P.2d 637 (N.M. 1994), the Supreme Court recognized an entitlement to good-time credits, the deprivation of which must comply with statutory and regulatory requirements.
What to do next
If someone you care about is facing sentencing, or has just been sentenced, here’s where to put your energy.
Get the judgment and sentence and read it. Not the plea agreement, but the actual signed judgment. Look for the words "serious violent offense." Look to see whether the court made findings and what they say.
Ask the question before the plea is signed, not after. Whether the State will seek a serious violent offense designation is negotiable in a way that the sentence length sometimes is not. A plea that looks identical on its face can carry years of difference depending on how that single issue is handled. This is the single most common place where people find out too late.
Get on the program list early. Vocational, substance abuse, mental health, GED. The statute rewards active participation and penalizes a lack of participation while incarcerated.
Keep the disciplinary record clean, especially in the first sixty days. For someone confined on a serious violent offense, the statute specifically flags that window.
Ask the Corrections Department for the calculation in writing. Subsection J requires that each prisoner receives a statement of meritorious deductions earned on initial award, when additional awards are given, when deductions are lost, and upon request.
Do not rely on what you were told at intake. Release-date estimates get repeated, misremembered, and passed around, and families build their lives around numbers that turn out to be wrong. Get it in writing and have someone who knows the statute look at it.
A word on certainty
The serious violent offense framework is well-developed. The parole consequences and the life-sentence rule are clear. Where it gets less clear is in the mechanics of the 2025 amendments and how the up-front award structure in Subsection B interacts with the monthly ceilings in Subsection C in day-to-day Corrections Department practice. Those are questions I would want to answer by reviewing the Department's rules and the specific case records, not by generalizing. Anyone who tells you they can give you an exact release date for a charge and a sentence length without looking at the judgment, the offense date, and the Department's calculation is guessing.
Disclaimer
This article provides general information about New Mexico's Earned Meritorious Deductions Act and related statutes. It is not legal advice about any particular case, and it should not be relied on as a substitute for consulting an attorney familiar with the specific charges, offense date, sentence, and record involved. Good-time calculations depend on facts this article cannot know.
Frequently Asked Questions
How much time will my family member actually serve?
It depends primarily on whether the sentence is classified as a serious violent offense. Under Section 33-2-34(C), someone confined for a serious violent offense can receive no more than four days of meritorious deductions per month, which historically amounts to roughly 85% of the sentence. Someone confined for a nonviolent offense can receive up to thirty days per month, which has generally meant closer to half. The Corrections Department performs the actual calculation, and the inmate is entitled to a written statement of deductions upon request under Subsection J.
Who decides whether a crime is a "serious violent offense"?
It depends on the offense and the judge that sentenced the defendant. Some crimes are serious violent offenses automatically under Section 33-2-34(N)(4)(a) through (n). Others, listed in Subparagraph (o), qualify only if the sentencing judge finds that the nature of the offense and the resulting harm warrant it.
Can a serious violent offense designation be challenged?
Sometimes. New Mexico appellate courts have reversed designations when the district court made no findings or when its findings addressed the defendant's history rather than the offense. Whether a challenge is available in a given case depends on the record and on procedural timing, so this is a question for counsel, promptly.
Does good time apply to time served in a county jail?
Not usually, because county jail time runs under a separate statute, Section 33-3-9. There the sheriff or jail administrator, with judicial approval, may grant deductions of up to one-half of the original sentence, and no good time accrues on the mandatory portion of a DWI or revoked-license sentence. Presentence confinement is also handled separately from the Earned Meritorious Deductions Act; Section 33-2-34(B) contemplates deductions being awarded on the remainder of the sentence after presentence confinement has been deducted.
Does earning good time shorten parole?
Not the way most people assume. Good time moves up the date a person leaves the facility, but the parole term set by Section 31-21-10 still applies: two years of parole for a first, second, or third-degree felony, and one year of parole for a fourth-degree felony. New Mexico Statutes Section 33-2-34(O) does permit deductions of up to thirty days per month against a parole term for a parolee in compliance with all conditions, on the parole officer's recommendation and with the Adult Parole Board's final approval, though sex offenders governed by Section 31-21-10.1 are excluded from that provision.
Talk to a New Mexico Criminal Defense Attorney
If you or someone in your family is facing a felony sentencing in New Mexico, the serious violent offense question deserves attention before anything is signed, not after. And if a sentence has already been imposed and the designation appears in the judgment without supporting findings, that is worth a second look. Attorney Johnn Osborn of the Law Office of Johnn Osborn PC (Land of Enchantment Law) handles criminal matters in state courts throughout New Mexico, from Albuquerque and Las Cruces to courts across the rest of the state. Bring the charging documents, any plea offer, and the judgment and sentence if one has been entered, and the situation can be reviewed directly.
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Disclaimer: The information in this article is for general informational purposes only and does not constitute legal advice. You should consult an attorney for advice regarding your individual situation. Contacting Land of Enchantment Law does not create an attorney-client relationship.