How a California Release Date Is Calculated: Time Credits Explained

The release date CDCR gives you is called the Earliest Possible Release Date, or EPRD, and it is an estimate — not a promise. It is printed on a document called the Legal Status Summary (LSS). The EPRD moves whenever credits are earned, lost, or restored, and CDCR does not simply add or subtract days when that happens. It recalculates the whole date from scratch.

The one document that explains his date

The Legal Status Summary is a computer printout holding the sentence CDCR recorded, every credit applied, and the EPRD. If you want to understand his date, that is the document to ask him for. Three things feed into it:

• The term the court imposed, taken from the Abstract of Judgment (Penal Code §1213).
• Credits from before he arrived at CDCR. County jail days awarded by the judge, plus the days between sentencing and transfer. CDCR calculates those itself (Penal Code §2900.5(e)) and applies conduct credit at the same rate the court used (Penal Code §4019(a)). They appear on the LSS as "vested credits."
• Credits earned in prison — Good Conduct Credit plus the program credits below.

The final step is a projection: CDCR estimates the Good Conduct Credit he is likely to earn between now and release, and subtracts it. That is why the date is only as good as the assumption that nothing changes.

Good Conduct Credit: the rate depends on the offense

There is no single California credit rate. The rates are set by 15 CCR §3043.2, and they turn on what he was convicted of and on which law was in effect for each stretch of his custody. As currently written, the regulation sets these tiers:

• Violent felonies (the list is in Penal Code §667.5(c)) — one day of credit for every four days served from May 1, 2017 through April 30, 2021, and one day for every two days served from May 1, 2021 forward.
• Non-violent offenses sentenced under the Two or Three Strikes laws — one day for every two days served from May 1, 2017 through April 30, 2021, and day-for-day from May 1, 2021 forward.
• Everyone else serving a determinate term — day-for-day.
• Minimum A or Minimum B custody, and people trained for or assigned to a fire camp on a non-violent offense — two days of credit for every one day served.
• Death sentences and life without parole — no Good Conduct Credit.

Two warnings. CDCR's percentage labels mislead: its "50%" means day-for-day credit, and he serves roughly half the term. And multiple cases with different eligibility are calculated separately, longest term first. Read the LSS rather than estimating.

His work group matters too. Classification committees assign work groups under 15 CCR §3044; most do not change the rate, but Work Group C and Work Group D-2 are zero-credit.

Four other credits that pull the date in

• Milestone Completion Credit — for approved academic, vocational, therapeutic, life-skills or substance-abuse programs. Up to 12 weeks per 12 months, excess rolling into the next year (15 CCR §3043.3).
• Rehabilitative Achievement Credit — one week per 52 hours of eligible self-help or volunteer activity, capped at four weeks a year (15 CCR §3043.4).
• Education Merit Credit — 90 days for a GED or high school diploma, 180 days for a higher degree or the offender mentor certification, if he earns at least half of it during this term (15 CCR §3043.5). Cannot be forfeited.
• Extraordinary Conduct Credit — up to 12 months for a heroic act or exceptional help maintaining safety (Penal Code §2935). Also cannot be forfeited.

One limit applies to all of them: credit will not be awarded or restored if doing so would move his release to less than 60 calendar days away (15 CCR §3043(c)).

Why the date moved back after a write-up

Only serious rule violations cost credit. Administrative violations carry no credit loss at all (15 CCR §3314(e)). Serious violations are graded into seven divisions, and 15 CCR §3323 sets the forfeiture range for each: 181 to 360 days for Division A-1, down to 0 to 30 days for Division F.

Here is the part almost nobody explains. CDCR does not add the forfeited days onto the EPRD. It recomputes his net earned credits and rebuilds the date. Because of how that arithmetic works, the date moves less than the number of days lost. If he is earning day-for-day credit and forfeits 90 days, his release date moves back by roughly 45 days — not 90.

Getting forfeited credit back

Some of it can be (15 CCR §§3327–3328). All credit lost for a Division D, E or F offense can come back. Nothing can be restored for an offense punishable by more than a 90-day loss — every A-1, A-2, B and C offense. He must stay disciplinary-free for 180 days (Divisions D and E) or 90 days (Division F) from the date of the violation, and a new violation inside that window ends it permanently.

Some losses are never restorable: refusing a drug or alcohol test, testing positive, making alcohol, and dangerous contraband (15 CCR §3327(a)). To apply he files CDCR Form 958 with his counselor, and a classification committee must hold a hearing within 30 days.

If the date looks wrong

First figure out whose mistake it is, because the fix is completely different.

A court error — wrong pre-sentence days, bad arithmetic, or the clerk mis-recording what the judge said — can only be corrected by the court. Compare the Abstract of Judgment against the sentencing transcript. Clear clerical or math errors can be fixed at any time, sometimes by letter or motion. His trial attorney is the right first call.

A CDCR error goes through the grievance process. He files CDCR Form 602-1 within 60 calendar days of discovering it (15 CCR §3482(b)(1)); the Office of Grievances must acknowledge it within 14 days (15 CCR §3483). If the answer is no, he appeals on CDCR Form 602-2 within 60 calendar days of the decision letter (15 CCR §3484(b)), and must finish that before any court will hear it. In the grievance he should ask for his credit print-outs — the sheets showing each credit earned, forfeited and restored. Those plus the LSS make an error visible.

One hard truth: an incorrect release date is not enforceable. People released early because of a credit error have been returned to prison (In re Messerschmidt (1980) 104 Cal.App.3d 514). Case records reviews his date 60 days and 10 days before release, which is when late corrections surface.

Common questions

Why does his release date keep changing?

Because the EPRD is a prediction, not a fixed date. It assumes his sentence and his credit-earning status stay the same. A new term, a work group change, a completed program, a rule violation, or a credit restoration all force a recalculation. Case records is supposed to update it periodically and give him a new Legal Status Summary when it changes.

Can I get a copy of his Legal Status Summary?

Not directly. The LSS is part of his central file, and CDCR releases it to him, not to family. Ask him to request a copy from his counselor and mail it to you. When his date changes he is entitled to a revised LSS, and he can require staff to explain how the new figure was calculated.

Does a write-up automatically push his date back?

No. Counseling-only and administrative violations carry no credit loss whatsoever. Only a guilty finding on a serious violation forfeits credit, and the amount depends on the division of the offense under 15 CCR §3323. Even then, the date moves by less than the days forfeited, because CDCR recalculates rather than adding days on.

He was found not guilty but was held past his date. Is that legal?

CDCR can hold someone past their release date while a serious disciplinary charge is pending. If he is then found not guilty, that extra time should not simply vanish — it is credited against his parole or post-release supervision period. Make sure the reduced supervision period is actually reflected in his paperwork once he is out.

Who can actually check his credit calculation?

The Prison Law Office is the best free starting point. They publish updated information letters on CDCR time credits and will mail paper copies to people in prison at no charge. Write to Prison Law Office, General Delivery, San Quentin, CA 94964, or call (510) 280-2621. Their materials are also free at prisonlaw.com.

This page is general information, not legal advice. For anything specific to his case, contact the Prison Law Office or a criminal defense attorney.

Last updated: August 2026.