Updated October 22, 2026. Quick answer: Under Massachusetts General Laws chapter 32, section 3, subdivision (3), an employee who had the right to join a retirement system but did not may apply and be admitted if still under the maximum age for the group on the date of application. Any other employee can be admitted only by a vote of the retirement board, and only if the board finds the failure to join was caused by circumstances other than those generally applicable to employees. Full credit for the earlier years comes only from make-up payments, with buyback interest, completed before the retirement allowance becomes effective.
What this covers
This is the rule for an employee who was eligible to join a Massachusetts public retirement system and did not, which the statute calls “Late Entry into Membership”. It is separate from repaying money you withdrew after leaving (see repaying withdrawn contributions in Massachusetts). For the wider choices at retirement, see Massachusetts state retirement decisions and public pension retirement decisions.
What the statute says, step by step
Each row is the statute’s own wording.
| Question | What section 3, subdivision (3) says |
|---|---|
| Who may apply | “any employee who, having or having had the right to become a member, failed to become or elected not to become a member, may apply for and be admitted to membership if under the maximum age for his group on the date of his application; provided, that during his present period of service he had previously been eligible for membership”, and the same sentence admits on the same age test “any employee who, having had the right to become a member of any retirement system established under the provisions of this chapter” who did not join |
| Anyone else: a board vote | “No employee shall otherwise be admitted to membership except by vote of the retirement board of the system for which application is made, and then only if that board finds that his failure to become or his election not to become a member was caused by circumstances other than those generally applicable to employees.” |
| What earns full credit for the earlier years | “No such member shall be entitled to full credit for service rendered prior to the date of his becoming a member, unless before the date any retirement allowance becomes effective for him he shall have paid into the annuity savings fund of the system in one sum, or in instalments, upon such terms and conditions as the board may prescribe, make-up payments of an amount equal to that which would have been withheld as regular deductions from his regular compensation had he joined the system at his earliest opportunity, together with buyback interest.” |
| When payments are finished | “Upon the completion of such make-up payments such member shall be entitled to all creditable service to which he would have been entitled had he joined the system when first eligible to become a member.” |
| If the allowance starts first | “In the event any retirement allowance becomes effective for him before the completion of such make-up payments, such member shall, in addition to credit for his actual membership service, be entitled to credit for that proportion of his service rendered prior to the date of his becoming a member which the total amount of his make-up payments actually made, together with buyback interest thereon to the date his retirement allowance becomes effective, bears to the total amount of what his make-up payments, together with buyback interest thereon to such latter date, would have been had he made payment thereof in one sum on such latter date.” |
The two year waiting rule that follows
Late entry does not bring an immediate right to an allowance. Another part of section 3 says that “no person who becomes a member under subdivision (3) of this section” “shall be eligible to receive a superannuation retirement allowance, an ordinary disability retirement allowance or a termination retirement allowance unless and until he shall have been in active service for at least two consecutive years”. The same paragraph does not apply to a member who is reinstated or re-enters service under paragraph (b), or who transfers membership under paragraph (8)(a), and who was eligible to receive a retirement allowance under section ten at the last separation from service. The next paragraph, (6)(f), separately requires at least five years of active service for a person whose earlier service was in a political subdivision before its retirement system became operative.
What the statute does not say
Section 3 does not itself state a number for the buyback interest rate, and the installment terms are the board’s to set. Section 1 of the chapter defines “buyback interest” as “one-half of actuarial assumed interest” and defines “maximum age” by reference to age 65 for Group 3 members and for listed uniformed occupations, without a figure for Groups 1, 2 and 4 in that definition. Subdivision (8)(b) adds that a member who is reinstated, re-enters service or is eligible to receive credit for other service under section 3, and who does not pay, or arrange installments, within one year pays “actuarial assumed interest instead of buyback interest”; whether that reaches a late entrant is a question for the board. Ask the board for a written figure before you decide. For the general question of whether paying for earlier service is worth it, see whether buying service credit is worth it and the pension buyback calculator.
Edition
This page reads Massachusetts General Laws, Part I, Title IV, Chapter 32, Section 3 (Membership), as malegislature.gov served it on 2026-10-22. It is statute text, not the retirement board’s member guide: the board’s forms, its installment terms and its buyback interest rate are outside it, so confirm them with the board.
Common mistakes
- Assuming any employee can join late. Admission without a vote is for an employee who had the right to join and is “under the maximum age for his group on the date of his application”; anyone else needs a vote of the board and a finding that the failure to join was “caused by circumstances other than those generally applicable to employees.”
- Waiting until after the allowance starts to pay. Full credit needs the payments finished “before the date any retirement allowance becomes effective for him”
- Expecting a benefit at once. The statute requires “active service for at least two consecutive years” after late entry.
Related: Massachusetts state retirement decisions, public pension retirement decisions, and pension buyback calculator.
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Answer againSources
- Massachusetts General Laws, Part I, Title IV, Chapter 32, Section 3 (Membership): malegislature.gov
- Related official page (not quoted): IRS, Topic no. 410, Pensions and annuities: www.irs.gov
- Related official page (not quoted): IRS, Topic no. 558, Additional tax on early distributions: www.irs.gov
Read from the statute text linked above on October 22, 2026. General information, not tax advice. Your own facts decide the outcome, and a pension system or a qualified professional is the right place to confirm anything consequential.