Fecteau, J.
This case presents the novel issue of whether a plaintiff who recovers punitive damages as part of a judgment under the provisions of G. L. c. 151B, § 9, against a subdivision of the Commonwealth may be awarded postjudgment interest on that award and on the award of attorney’s fees and costs, or whether sovereign immunity bars such interest.1 The statutes relevant to the issue, including those under which the punitive [730]*730damages were awarded, i.e., c. 151B, and G. L. c. 235, § 8 (interest on judgments), are silent on the matter. Neither the Appeals Court nor the Supreme Judicial Court has squarely addressed the issue in a published opinion with respect to c. 151B. In Sheriff of Suffolk County v. Jail Officers & Employees of Suffolk County, 465 Mass. 584, 597-598 (2013), the Supreme Judicial Court stated, “the general rule is that ‘the Commonwealth ... is not liable for postjudgment interest in the absence of a clear statutory waiver of sovereign immunity in that regard,’ ” and “entities entitled to sovereign immunity are not liable for interest under G. L. c. 235, § 8, absent an unequivocal statutory waiver,” citing Chapman v. University of Mass. Med. Center, 423 Mass. 584, 586 (1996). Thus, we must discern whether this case presents an exception to the general rule.
In Todino v. Wellfleet, 448 Mass. 234, 238 (2007) (Todino), the court generally observed that “[m]unicipal liability implicates the doctrine of sovereign immunity, which protects the public treasury from unanticipated money judgments. Sovereign immunity prohibits liability against the Commonwealth [and] ... its instrumentalities . . . except with [the Commonwealth’s] consent, and, when that consent is granted . . . only in the manner and to the extent expressed . . . [by] statute” (citation and quotation omitted). The court also noted that “[t]he rules of construction governing statutory waivers of sovereign immunity are stringent.” Ibid, (quotation omitted). However, it allowed that “even a strict interpretation must be reasonable, and our focus remains on the intent of the Legislature. If sovereign immunity is not waived expressly by statute, we consider whether governmental liability is necessary to effectuate the legislative purpose.” Ibid, (citations omitted). See DeRoche v. Massachusetts Commn. Against Discrimination, 447 Mass. 1,12-13 (2006) (DeRoche). Thus, the issue presented in this case reduces to whether sovereign immunity has been waived by necessary implication in regard to postjudgment interest on punitive damages, costs, and attorney’s fees in an award against the Commonwealth or its entities under c. 15IB.
[731]*731The Commonwealth contends that sovereign immunity has not been waived for this type of postjudgment interest.2 It urges that there is a substantial and practical reason that justifies treatment of the Commonwealth differently from private employers. While it recognizes that G. L. c. 151B, § 1(1) and (5), includes the Commonwealth in the statutory definition of “persons” and “employers” subject to c. 15IB, and that generally the Legislature intended for the Commonwealth to be treated the same as private employers under most of the statutes and rules applicable in c. 15 IB proceedings, it argues that postjudgment interest on punitive damages is fundamentally different in kind from any other type of award or benefit. This is true if only because the amount of punitive damages is neither foreseeable nor readily available for payment given the system of balanced budgeting and that State departments and agencies must depend on legislative appropriation for their funding, thus requiring time to obtain funds necessary to pay such awards. Indeed, as noted in M. O’Connor Contr., Inc. v. Brockton, 61 Mass. App. Ct. 278, 285 n.12 (2004), “[p]unitive damages, by definition, are not intended to compensate the injured party, but rather to punish and deter the wrongdoer; yet an award of punitive damages against a municipality punishes only the taxpayers, who took no part in the wrongful conduct, but who nevertheless may incur an increase in taxes or a reduction in public services as a result of the award. See Newport v. Fact Concerts, Inc., 453 U.S. [247,] 266-267 [1981].” Thus, the underlying reasoning for postjudgment interest on awards under c. 15IB — to encourage prompt payment by employers — ought not apply to the Commonwealth.3
The plaintiff relies on DeRoche, supra at 3, where the Supreme [732]*732Judicial Court reviewed a judgment of the Superior Court affirming an award entered by the Massachusetts Commission Against Discrimination (MCAD) on a complaint brought under G. L. c. 151B, § 5, against a public entity. The MCAD found for the plaintiff and awarded compensatory damages but did not assess interest on the damages. Ibid. The Superior Court, in affirming the award, ordered prejudgment and postjudgment interest. See id. at 6. The Supreme Judicial Court, noting that c. 151B, and G. L. c. 258, § 1 (“the primary statutory basis for the waiver of sovereign immunity”), are silent on whether interest may be assessed on awards under c. 15 IB against the Commonwealth, held that for certain provisions of c. 151B, sovereign immunity of the Commonwealth had been waived for interest purposes “by necessary implication.” Id. at 12-14 (quotation omitted). The court reached its decision on two grounds.
First, because the Commonwealth is explicitly included as a “person” or “employer” subject to suit under c. 15IB, and because the MCAD has the power to impose prejudgment interest on private employers in the c. 15 IB context, the “inevitable conclusion” is that the Legislature must have intended for the Commonwealth to also be subject to interest. Id. at 13.
Second, the court reasoned, c. 151B, § 5 (regarding proceedings before the MCAD and the MCAD’s powers), gives the MCAD broad discretion to order a full range of remedies to eradicate discrimination, therefore also supporting the conclusion that the Legislature intended to allow the MCAD to impose interest on awards entered against the Commonwealth. Id. at 13-14. The court affirmed the judgment of the Superior Court allowing prejudgment and postjudgment interest to be assessed against the Commonwealth. See ibid. The plaintiff here avers, relying on the same reasoning as in DeRoche, that because c. 151B explicitly puts the Commonwealth in the same class as private employers, remedies that can be imposed against a private employer can be imposed against the Commonwealth. The plaintiff contends that it is a logical extension of the reasoning in DeRoche to conclude that, because private employers are subject to postjudgment interest on those types of awards, so must the Commonwealth, by necessary implication of legislative intent.
However, there are three limitations to the reach of DeRoche, [733]*733supra, that we consider significant. First, while we recognize the court addressed postjudgment interest, id. at 19 n. 19 (note 19),4 the MCAD had not raised as an issue whether postjudgment interest should be treated differently from the prejudgment interest portion of the judgment. See note 19. The case was primarily focused on prejudgment interest, see id.
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Fecteau, J.
This case presents the novel issue of whether a plaintiff who recovers punitive damages as part of a judgment under the provisions of G. L. c. 151B, § 9, against a subdivision of the Commonwealth may be awarded postjudgment interest on that award and on the award of attorney’s fees and costs, or whether sovereign immunity bars such interest.1 The statutes relevant to the issue, including those under which the punitive [730]*730damages were awarded, i.e., c. 151B, and G. L. c. 235, § 8 (interest on judgments), are silent on the matter. Neither the Appeals Court nor the Supreme Judicial Court has squarely addressed the issue in a published opinion with respect to c. 151B. In Sheriff of Suffolk County v. Jail Officers & Employees of Suffolk County, 465 Mass. 584, 597-598 (2013), the Supreme Judicial Court stated, “the general rule is that ‘the Commonwealth ... is not liable for postjudgment interest in the absence of a clear statutory waiver of sovereign immunity in that regard,’ ” and “entities entitled to sovereign immunity are not liable for interest under G. L. c. 235, § 8, absent an unequivocal statutory waiver,” citing Chapman v. University of Mass. Med. Center, 423 Mass. 584, 586 (1996). Thus, we must discern whether this case presents an exception to the general rule.
In Todino v. Wellfleet, 448 Mass. 234, 238 (2007) (Todino), the court generally observed that “[m]unicipal liability implicates the doctrine of sovereign immunity, which protects the public treasury from unanticipated money judgments. Sovereign immunity prohibits liability against the Commonwealth [and] ... its instrumentalities . . . except with [the Commonwealth’s] consent, and, when that consent is granted . . . only in the manner and to the extent expressed . . . [by] statute” (citation and quotation omitted). The court also noted that “[t]he rules of construction governing statutory waivers of sovereign immunity are stringent.” Ibid, (quotation omitted). However, it allowed that “even a strict interpretation must be reasonable, and our focus remains on the intent of the Legislature. If sovereign immunity is not waived expressly by statute, we consider whether governmental liability is necessary to effectuate the legislative purpose.” Ibid, (citations omitted). See DeRoche v. Massachusetts Commn. Against Discrimination, 447 Mass. 1,12-13 (2006) (DeRoche). Thus, the issue presented in this case reduces to whether sovereign immunity has been waived by necessary implication in regard to postjudgment interest on punitive damages, costs, and attorney’s fees in an award against the Commonwealth or its entities under c. 15IB.
[731]*731The Commonwealth contends that sovereign immunity has not been waived for this type of postjudgment interest.2 It urges that there is a substantial and practical reason that justifies treatment of the Commonwealth differently from private employers. While it recognizes that G. L. c. 151B, § 1(1) and (5), includes the Commonwealth in the statutory definition of “persons” and “employers” subject to c. 15IB, and that generally the Legislature intended for the Commonwealth to be treated the same as private employers under most of the statutes and rules applicable in c. 15 IB proceedings, it argues that postjudgment interest on punitive damages is fundamentally different in kind from any other type of award or benefit. This is true if only because the amount of punitive damages is neither foreseeable nor readily available for payment given the system of balanced budgeting and that State departments and agencies must depend on legislative appropriation for their funding, thus requiring time to obtain funds necessary to pay such awards. Indeed, as noted in M. O’Connor Contr., Inc. v. Brockton, 61 Mass. App. Ct. 278, 285 n.12 (2004), “[p]unitive damages, by definition, are not intended to compensate the injured party, but rather to punish and deter the wrongdoer; yet an award of punitive damages against a municipality punishes only the taxpayers, who took no part in the wrongful conduct, but who nevertheless may incur an increase in taxes or a reduction in public services as a result of the award. See Newport v. Fact Concerts, Inc., 453 U.S. [247,] 266-267 [1981].” Thus, the underlying reasoning for postjudgment interest on awards under c. 15IB — to encourage prompt payment by employers — ought not apply to the Commonwealth.3
The plaintiff relies on DeRoche, supra at 3, where the Supreme [732]*732Judicial Court reviewed a judgment of the Superior Court affirming an award entered by the Massachusetts Commission Against Discrimination (MCAD) on a complaint brought under G. L. c. 151B, § 5, against a public entity. The MCAD found for the plaintiff and awarded compensatory damages but did not assess interest on the damages. Ibid. The Superior Court, in affirming the award, ordered prejudgment and postjudgment interest. See id. at 6. The Supreme Judicial Court, noting that c. 151B, and G. L. c. 258, § 1 (“the primary statutory basis for the waiver of sovereign immunity”), are silent on whether interest may be assessed on awards under c. 15 IB against the Commonwealth, held that for certain provisions of c. 151B, sovereign immunity of the Commonwealth had been waived for interest purposes “by necessary implication.” Id. at 12-14 (quotation omitted). The court reached its decision on two grounds.
First, because the Commonwealth is explicitly included as a “person” or “employer” subject to suit under c. 15IB, and because the MCAD has the power to impose prejudgment interest on private employers in the c. 15 IB context, the “inevitable conclusion” is that the Legislature must have intended for the Commonwealth to also be subject to interest. Id. at 13.
Second, the court reasoned, c. 151B, § 5 (regarding proceedings before the MCAD and the MCAD’s powers), gives the MCAD broad discretion to order a full range of remedies to eradicate discrimination, therefore also supporting the conclusion that the Legislature intended to allow the MCAD to impose interest on awards entered against the Commonwealth. Id. at 13-14. The court affirmed the judgment of the Superior Court allowing prejudgment and postjudgment interest to be assessed against the Commonwealth. See ibid. The plaintiff here avers, relying on the same reasoning as in DeRoche, that because c. 151B explicitly puts the Commonwealth in the same class as private employers, remedies that can be imposed against a private employer can be imposed against the Commonwealth. The plaintiff contends that it is a logical extension of the reasoning in DeRoche to conclude that, because private employers are subject to postjudgment interest on those types of awards, so must the Commonwealth, by necessary implication of legislative intent.
However, there are three limitations to the reach of DeRoche, [733]*733supra, that we consider significant. First, while we recognize the court addressed postjudgment interest, id. at 19 n. 19 (note 19),4 the MCAD had not raised as an issue whether postjudgment interest should be treated differently from the prejudgment interest portion of the judgment. See note 19. The case was primarily focused on prejudgment interest, see id. at 13-14, and as such, although the court allowed postjudgment interest to stand, that portion of the judgment had not been challenged, and thus served only as a historical artifact not essential to the court’s analysis. Second, the substantive award consisted only of compensatory damages; no punitive damages were awarded. Therefore, the court had no need to address whether postjudgment interest may be allowable on a punitive damages award. Third, one of the bases for the court’s holding, as mentioned above, was the broad discretion the Legislature afforded to the MCAD under c. 151B, § 5, whereas the case at bar involves a Superior Court trial and jury verdict awarding punitive damages under c. 151B, § 9. While civil penalties may now be imposed by the MCAD, see G. L. c. 151B, § 5, as amended in 2003,5 such penalties are limited in amount, not as broad as penalties available after a trial, and “staircased” depending on prior violations. See G. L. c. 151B, § 5, fourth par.
Furthermore, while there is a logical thread in our cases discerning a legislative intent, either expressed or implied, to permit interest on compensatory awards so that employees do not suffer a loss in value, due to the passage of time, of their earnings awarded as damages, there is reason to interpret the case law to limit such interest to compensatory awards only. Compare, e.g., Perkins Sch. for the Blind v. Rate Setting Commn., 383 Mass. 825, 835 (1981) (“Interest is awarded by law so that a person wrongfully deprived of the use of money should be made whole for [her] loss”); Todino, 448 Mass, at 239 (discussing interest on award under provisions of G. L. c. 41, § 11 IF, court stated that “considering the time value of the dollar, the only way in which a[n] . . . award will retain its stated worth is by adding interest in [734]*734order to compensate for delay in payment from that point forward”) (quotation omitted), with Onofrio v. Department of Mental Health, 411 Mass. 657, 659-660 (1992) (noting that “the fact that the Legislature provided for the recovery of damages from the Commonwealth in G. L. c. 258 does not lead necessarily to the conclusion that the statute allows for the recovery of costs as well, because costs are an ancillary matter to the underlying concern of liability for damages. Postjudgment interest, similarly, is not an element of damages. Rather, postjudgment interest serves to compensate the plaintiff for loss of the use of money when damages are not paid on time”) (quotation and citation omitted). In our view, the considerations that apply to the loss of use of money awarded to compensate for lost earnings are significantly different from those involving a delay in receiving a punitive damage award which is not designed to compensate but rather to punish.
Indeed, the court in DeRoche reiterated that it had drawn a line and denied interest for awards of front pay:
“We also have spoken clearly on the issue of the interest on front pay awards in discrimination cases. In Conway v. Electro Switch Corp., [402 Mass. 385, 390 (1988)], we stated that there was ‘no justification for adding interest to damages which, by definition, are for losses to be incurred in the future.’ We decline to revisit this issue. While the plaintiff is entitled to prejudgment interest on the back pay damage award, he is not entitled to prejudgment interest on the front pay award.”
DeRoche, 447 Mass, at 15. Similarly, we conclude that such intent can be discerned with respect to punitive damages, since their purpose is not to compensate for lost pay, but rather to penalize for wrongdoing.
While not on all fours, we find support in Gurley v. Commonwealth, 363 Mass. 595, 599-600 (1973), in which the court failed to discern by necessary implication a waiver of sovereign immunity for interest on awards for victims of violent crimes under the provisions of G. L. c. 258A in effect at the time.6 See Todino, 448 Mass, at 241 (noting that court in Gurley held that “because . . . the payment [under the statute is] essentially a gift, no award of interest would be necessary or reasonable”).
[735]*735Consequently, for the foregoing reasons, we fail to be persuaded by the plaintiff that sovereign immunity has been waived, by necessary implication, for postjudgment interest on awards of punitive damages, attorney’s fees, and costs.
Judgment after rescript affirmed.