NYC TRS Tier 4 vs Tier 6 Retirement: Key Differences

Two Different Retirement Systems Under One Roof

Your hire date determines your tier, and your tier determines nearly everything about your retirement — when you can retire without a penalty, how your benefit is calculated, what you contribute, and how steep the early retirement reduction is. Tier IV (hired before April 1, 2012) and Tier VI (hired on or after that date) operate under materially different rules.

Here is a direct comparison of the provisions that affect your retirement planning.

Unreduced Retirement Age

Tier IV (Basic Plan): Age 62, or age 55 if enrolled in the 55/25 or 55/27 program with the required years of service.

Tier VI: Age 63. No special early-retirement program exists for Tier VI.

This means Tier VI members wait one year longer for an unreduced benefit — and the early retirement penalty is steeper.

Early Retirement Penalties

Tier IV: Retiring between 55 and 61 without qualifying for the 55/25 or 55/27 program triggers reductions of 6% per year for ages 60–61 and 3% per year for ages 55–59. At age 55 with less than 25 years of service, the total reduction is 27%.

Tier VI: 6.5% permanent reduction for each year under age 63. A Tier VI member retiring at age 55 faces a 52% benefit reduction. This is more than double the Tier IV penalty at the same age.

Final Average Salary Calculation

Tier IV: Three highest consecutive years of pensionable earnings.

Tier VI: Also three highest consecutive years, following the 2024 State Budget restoration. Before that legislation, Tier VI used a five-year average. Both tiers apply a 10% annual salary growth cap to prevent salary spiking.

Contribution Rates

Tier IV (Basic Plan): 3% of gross compensation for the first 10 years of membership, then 0%. Members enrolled in the 55/25 or 55/27 program pay 4.85%, reducing to 1.85% after 10, 25, or 27 years of service, depending on the member's enrollment and hire date.

Tier VI: A sliding scale based on annual wages, ranging from 3% to 6%. Contributions continue for the member's entire career with no phase-out.

Vesting

Tier IV: 5 years of Total Service Credit.

Tier VI: Also 5 years, following the 2022 legislative change (Chapter 56) that lowered it from 10 years. Before that, Tier VI members needed a full decade to vest.

Benefit Multiplier

Tier IV (Article 15): Ranges from 1.667% per year (under 20 years) to 2.0% per year (20–29 years) to 60% of FAS at exactly 30 years, then 1.5% for each year beyond 30.

Tier VI: Use the MyTRS estimate for your own calculated allowance rather than applying the Tier IV multiplier schedule.

A Tier IV member with 30 years and a $120,000 FAS receives $72,000 annually. Use MyTRS to compare a Tier VI estimate using your own service and salary record.

The Health Insurance Vesting Trap

Both tiers share the same retiree health insurance rules, but the mismatch is far more dangerous for Tier VI members. Pension vesting at 5 years does not guarantee retiree health coverage. NYC Administrative Code § 12-126 requires 10 years of credited service for City-subsidized retiree health insurance (15 years for UFT-represented DOE employees appointed on or after April 28, 2010).

A Tier VI member who vests their pension at 5 years and leaves city employment loses retiree health coverage entirely. The pension check is real but small — and the cost of private health insurance until Medicare eligibility at 65 can easily exceed the pension itself.

Which Matters More

Tier IV members have more flexibility: lower penalties for early retirement, a higher benefit multiplier, and a contribution rate that eventually drops to zero. Tier VI members need more years of service to reach the same monthly benefit and face significantly steeper penalties for retiring before 63.

If you are Tier IV, the main planning question is whether the 55/25 or 55/27 program applies to you and whether your service credit qualifies. If you are Tier VI, the question is whether you can accumulate enough years to justify retiring before 63 — and whether you will cross the 10-year (or 15-year) threshold for retiree health coverage.

The NYC TRS Retirement Guide includes tier-specific worksheets for calculating your benefit under both scenarios.

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