Massachusetts General Laws

Mass. Gen. Laws ch. 127, § 129C (2026)

Confinement in prison camp; deduction of sentence for good conduct

✓ current as of July 2026

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Section 129C. For the satisfactory conduct of a prisoner confined in a prison camp, the commissioner may grant, in addition to the deductions of sentence provided under section one hundred and twenty-nine, a further deduction of sentence of not more than two and one half days for each month while confined in a prison camp. Such further deduction of sentence shall be added to any deduction to which the prisoner is entitled under section one hundred and twenty-nine for computing the minimum term of sentence for release on parole as authorized by section one hundred and thirty-three, or for reducing the term of imprisonment by deduction from the maximum term for which he may be held under his sentence or sentences. A prisoner whose term of imprisonment is reduced shall receive from the commissioner a certificate of discharge on the date which has been determined by such additional deduction from the maximum term of his sentence or sentences.

Notes of Decisions

Cited in 10 cases (2 in the last 5 years), 1977–2026 · leading case: Hayward v. Marshall, 603 F.3d 546 (9th Cir. 2010).

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Hayward v. Marshall, 603 F.3d 546 (9th Cir. 2010). · cites it 2× “§§ 3-704; Mass. Gen. Laws Ann. ch. 127, § 129C; Mo.”

M. C. v. Comm'r of Corr., 507 N.E.2d 253 (Mass. 1987). · cites it 2× “127, §§ 83A and 83B, were unconstitutional on their face, but upheld the constitutionality of G. L. c. 127, § 129C. The judge also allowed the plaintiff’s motion for attorney’s fees and costs, but did not allow the full amount of fees and costs sought by the plaintiff.”

Pina v. Superintendent, Massachusetts Corr. Inst., 382 N.E.2d 1079 (Mass. 1978). “2 The judgment ordered other credits not in dispute here, namely: (a) four days credited on the mittimus; (b) two days for the time jailed after the revocation of parole; and (c) 153% days’ good time earned under G. L. c. 127, §§ 129C and 129D. 3 "A prisoner released on parole .”

Connery v. Comm'r of Corr., 598 N.E.2d 1135 (Mass. App. Ct. 1992). “127, § 129, and earned good time, authorized by G. L. c. 127, §§ 129C and 129D. Statutory good time is credited only against the maximum sentence imposed by the judge and, therefore, can bring the date of “wrap up” closer.”

Gardiner v. Comm'r of Corr., 363 N.E.2d 1323 (Mass. App. Ct. 1977). · cites it 2× “22, which became G. L. c. 127, § 129C, by St. 1963, c. 164 (“An Act providing a further deduction of sentence for good conduct while confined át a prison camp”).”

Lynch, 389 N.E.2d 91 (Mass. App. Ct. 1979). “It has not been suggested by anyone that the provisions of G. L. c. 127, § 129C, have any application to the present case.”

Commonwealth v. David A. Delratez (Mass. App. Ct. 2025). “While prisoners in Massachusetts are generally eligible for earned good time credit, see G. L. c. 127, §§ 129C, 129D; 103 Code Mass.”

Commonwealth v. Psikarakis; Commonwealth v. Smith (Mass. 2026). “See G. L. c. 127, §§ 129C (prisoners are eligible for deductions of sentence for "satisfactory conduct"), 129D ("Prisoners are eligible to earn .”

Rampino v. Brady, 392 F. Supp. 2d 77 (D. Mass. 2005). “The petitioner also cites to Mass. Gen. Laws ch. 127, §§ 129C and 129D, which provide that a prisoner may earn certain credits for participation in institutional programs.”

Hayward v. Marshall (9th Cir. 2010). “§§ 3-704; Mass. Gen. Laws Ann. ch. 127, § 129C; Mo.”

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