How the Connecticut State Employees Retirement System Works

The Connecticut State Employees Retirement System is a tier-based defined benefit pension covering most state employees, and the date you were first hired into a pension-eligible state job decides almost everything about your retirement: your contribution rate, the age you can retire, the formula that sets your check, and whether you also have a defined contribution account alongside your pension. The system is administered by the State Employees Retirement Commission under the Office of the State Comptroller, and it is governed by Chapter 66 of the Connecticut General Statutes.¹ Find your tier first; the rest of the plan flows from it.

Which Tier You Belong To

Your tier is set by the date you first entered pension-eligible state service, and it stays with you for the rest of your career, even if you leave and come back later.

Tier I: hired on or before July 1, 1984.²
Tier II: hired July 2, 1984 through June 30, 1997.³
Tier IIA: hired on or after July 1, 1997, but before July 1, 2011.⁴
Tier III: hired on or after July 1, 2011, but before July 31, 2017.⁵
Tier IV: hired on or after July 31, 2017.⁶

Tiers I through III are purely defined benefit: your retirement check comes from a formula, not from an investment account. Tier IV is different. It combines a defined benefit pension with a defined contribution account, so a Tier IV retiree draws from two sources.

Vesting

You earn a permanent right to a future pension after 10 years of vesting service. Leave before you hit 10 years and you can withdraw your own contributions plus interest, but the monthly pension is gone. Once vested, the pension is yours even if you separate before retirement age; you just have to wait until the applicable age to start collecting. Vesting service includes your actual state service and, depending on your tier, certain military service and other credited periods.

When You Can Retire With Full Benefits

Each tier has its own age and service thresholds for an unreduced pension. Later tiers generally require older ages.

Tier I: age 55 with 25 years, age 65 with 10 years, or age 70 with 5 years.⁷ Because Tier I closed in 1984, most of these members have already retired.

Tier II: age 60 with 25 years of vesting service, or age 62 with 10 years.³

Tier IIA: for most active members, age 65 with 10 years, or age 63 with 25 years of vesting service. The earlier thresholds of age 62 (or age 60 with 25 years) still apply to members who retired on or before July 1, 2022, who reached that earlier age before that date, or who elected to preserve it under the 2017 SEBAC agreement.⁴

Tier III and Tier IV: age 65 with 10 years, or age 63 with 25 years of vesting service.⁸⁹

Retiring Early

You can retire before your normal retirement age, but your monthly benefit is permanently reduced, and the reduction never adjusts back up when you eventually reach normal retirement age.

Tier II and Tier IIA members can start at age 55 with 10 years of vesting service. Tier II’s reduction is one-quarter of one percent per month before normal retirement age.³ Tier IIA members retiring early after October 1, 2011, face one-half of one percent per month.⁴ Five years early under Tier II is roughly a 15% cut; the same five years under Tier IIA is roughly 30%.

Tier IV early retirement starts at age 58 with 10 years of vesting service, reduced by one-half of one percent per month before normal retirement age.⁹

How Your Pension Is Calculated

Every tier uses the same basic formula: a benefit rate (a percentage) multiplied by your years of credited service, multiplied by an average salary. What changes across tiers is the rate and the salary-averaging period.

Tier I uses 2% per year of service for members with more than 25 years or those over age 65; younger members with less service get a lower rate from a chart that weighs age and service together. The average is your three highest-paid years, and those years do not have to be consecutive.¹⁰ A salary-spiking rule caps any single year at 130% of the average of the two preceding years, or 150% when mandatory overtime is included.¹¹ A Tier I Plan A or Plan C member with 30 years and a $75,000 three-year average earns about $45,000 a year, or $3,750 a month before adjustments.

Tier IV uses a lower rate: 1.3% per year of credited service, multiplied by average salary. The lower multiplier reflects that Tier IV also has a defined contribution account contributing to retirement income.⁹ Hazardous duty Tier IV members use 2.5% for their first 20 years in hazardous positions, then 2% for any service beyond that.

Tier II, Tier IIA, and Tier III fall between those endpoints; the specific rates and averaging periods are in each tier’s summary plan description from the Comptroller’s office.

What Comes Out of Your Paycheck

The 2017 SEBAC agreement restructured contribution rates, so what you pay today is not what was originally set when your tier opened. Contributions are pre-tax.

Tier I: rates depend on plan type (Plan A, B, or C) and Social Security integration.
Tier II: originally state-funded for non-hazardous-duty members; the 2017 SEBAC agreement introduced a 2% employee contribution. Hazardous duty is 4%.³
Tier IIA: 4% of total annual salary, up from the 2% rate in effect through June 30, 2017. Hazardous duty pays more.⁴
Tier III: 2% of total annual salary, or 5% for hazardous duty.⁸
Tier IV: 5% of salary to the defined benefit portion plus 1% to the defined contribution component, totaling 6%. Hazardous duty is 8% to the defined benefit side plus 1% to defined contribution.⁹

Tier IV members may owe additional contributions in years when SERS investments underperform.

If You Become Disabled

SERS has two disability retirement paths. Non-service-connected disability requires at least five years of state service, permanent inability to perform your current job, and being under age 60 when the disability starts. The benefit runs for 24 months initially and continues past that only if you are totally disabled from any comparable job.¹²

Service-connected disability applies when the injury was sustained while performing state duties. There is no minimum service requirement.¹² Claims go to a Medical Examining Board, which reports findings to the Retirement Commission for the final decision.

Payment Options and Survivor Benefits

When you retire, you pick a payment option that trades the size of your check against protection for a survivor.¹³

Straight Life Annuity pays the highest monthly amount, for your lifetime only. Payments stop when you die.
The 50% Spouse Option pays a reduced amount while you live, with half of that continuing to your surviving spouse for life.
The 50% or 100% Survivor Option lets you name any beneficiary and choose either continuation level.
Period Certain (10 or 20 years) pays a reduced monthly amount for life with a guarantee of at least 10 or 20 years of payments from your retirement date; if you die inside the window, the balance goes to your beneficiary.

If you die while still actively employed or on approved leave, your spouse can receive a monthly benefit if you were retirement-eligible or had at least 25 years of service, and you had been married at least one year immediately before your death. That spousal benefit is 50% of the average of what you would have received under the Spouse Option and the Straight Life Annuity. If no spousal benefit applies, your designated beneficiary gets a lump-sum refund of your contributions plus 5% annual interest.

Cost-of-Living Adjustments After You Retire

SERS pensions receive annual COLAs, and the formula depends on when you retired, not which tier you belong to. COLAs track the CPI-W, the Consumer Price Index for Urban Wage Earners and Clerical Workers.¹⁴

Retired on or after August 1, 2022: if CPI-W is 2% or less, your COLA matches it. If CPI-W is above 2%, the COLA runs from a 2% minimum to a 7.5% maximum, calculated as 60% of the CPI-W increase up to 6%, plus 75% of any increase above 6%.
Retired after October 1, 2011, but on or before July 1, 2022: COLA runs from a 2% minimum to a 7.5% maximum, using the same 60%/75% formula. No pass-through in low-inflation years.
Retired on or after July 1, 1999, but before October 2, 2011: COLA runs from a 2.5% minimum to a 6% maximum, using the 60%/75% formula.
Retired before July 1, 1999: the COLA is set by your plan’s original summary plan description.

The floor of 2% or 2.5% gives real inflation protection in quiet years, but the caps mean purchasing power can slip during high-inflation stretches.

Taxes and Social Security

SERS pension payments are subject to federal income tax. If any of your contributions were made after-tax, the portion of each payment that represents return of those contributions is tax-free; the rest is taxable. If all your contributions were pre-tax, everything is taxable.¹⁵

You control federal withholding by filing Form W-4P with the Comptroller’s office. Without a W-4P, taxes are withheld as though you are single with no adjustments. On an eligible rollover distribution paid to you rather than rolled directly, 20% of the taxable amount is withheld automatically.¹⁵

Distributions before age 59½ can trigger an additional 10% early distribution tax. Qualified public safety employees of the state who separate from service during or after the year they turn 50 are exempt from that 10% penalty.¹⁶

Most SERS positions are covered by Social Security, so you pay Social Security taxes on your state earnings and collect Social Security in addition to your pension. Some older arrangements, like Tier I’s Plan B, may have had limited or no Social Security coverage. Two federal rules used to cut Social Security benefits for people with a pension from non-covered government work: the Windfall Elimination Provision, which trimmed your own benefit, and the Government Pension Offset, which reduced spousal or survivor benefits by two-thirds of your government pension. The Social Security Fairness Act, signed January 5, 2025, eliminated both for benefits payable after December 2023.¹⁷ If your check was reduced under either provision, the adjustment should already be reflected; contact the Social Security Administration if you think it is not.

Is Your Pension Safe?

SERS is one of the more underfunded state pension systems in the country. The most recent actuarial valuation put the funded ratio at roughly 59.6%, with an unfunded liability of about $17.6 billion, an improvement over prior years driven by investment gains and larger state contributions. The state has a legal obligation to pay promised benefits regardless of the funded ratio, and benefits already earned by current retirees are not changed by the reforms that have raised contributions and retirement ages for active employees.

Those reforms come out of collective bargaining. SERS benefits are negotiated through the State Employees Bargaining Agent Coalition (SEBAC), and changes to contribution rates, retirement ages, and benefit formulas require agreement between the state and SEBAC. The 2017 SEBAC agreement created Tier IV for new hires, raised contribution rates across existing tiers, moved Tier IIA’s normal retirement age up, and runs through 2027.¹⁸

1
Justia. Connecticut General Statutes Title 5 Chapter 66
2
Office of the State Comptroller. SERS Tier I
3
Connecticut State Employees Retirement System. Tier II Summary Plan Description
4
Office of the State Comptroller. SERS Tier IIA Summary Plan Description
5
Office of the State Comptroller. SERS Tier III
6
Office of the State Comptroller. SERS Tier IV
7
Office of the State Comptroller. Tier I Eligibility Requirements
8
Office of the State Comptroller. Tier III Summary Plan Description
9
Office of the State Comptroller. SERS Tier IV Summary Plan Description
10
Office of the State Comptroller. Tier I Benefit Calculation
11
Connecticut State Employees Retirement System. Tier I Summary Plan Description – Types of Retirement
12
Justia Law. Connecticut General Statutes 5-169 – Disability Retirement
13
Office of the State Comptroller. Tier I Summary Plan Description – Benefit Payment Options
14
Office of the State Comptroller. How is the COLA Calculated?
15
Internal Revenue Service. Topic No. 410, Pensions and Annuities
16
Internal Revenue Service. Retirement Topics – Exceptions to Tax on Early Distributions
17
Social Security Administration. Social Security Fairness Act – Windfall Elimination Provision and Government Pension Offset
18
State of Connecticut / SEBAC. SEBAC 2017 Agreement