NYSTRS Tier 5 Retirement: Eligibility, Reductions, and FAS Rules

Tier 5 is the short-lived bridge between Tier 4 and Tier 6 — members who joined NYSTRS between January 1, 2010 and March 31, 2012. If that is you, your rules split the difference between the two neighboring tiers in ways that are easy to confuse.

Eligibility: Age 62 Unreduced, or Age 57 With 30 Years

Tier 5 members vest after five years of credited New York State service, matching every other tier since the 2022 vesting parity reform.

For unreduced benefits, you need either:

• Age 62 with at least 5 years of service, or
• Age 57 with at least 30 years of service

The age-57 threshold is higher than Tier 4's age-55 cutoff for the 30-year rule, but lower than Tier 6's newly reformed age-58 threshold (effective April 2026 for Tier 6 members with 30+ years). It can feel like Tier 5 drew the short straw — Tier 4 members get unreduced benefits two years earlier with the same 30 years of service.

You can retire as early as age 55 with at least 5 years of service, but early retirement reductions apply.

Early Retirement Reduction Schedule

The Tier 5 reduction formula is steeper than Tier 4's. Here is the cumulative reduction for each year before age 62:

• Age 61: 6.67% reduction
• Age 60: 13.33%
• Age 59: 18.33%
• Age 58: 23.33%
• Age 57: 28.33%
• Age 56: 33.33%
• Age 55: 38.33%

Compare this to Tier 4, where the maximum reduction at age 55 is 27%. At age 55 with under 30 years of service, a Tier 5 member loses over 11 percentage points more than a Tier 4 member in the identical situation.

These reductions are permanent. They apply for the rest of your life and carry through to any survivor option you elect.

FAS Calculation: Three Highest Years

Tier 5 uses the same Final Average Salary formula as Tier 4: the highest three consecutive school years (July 1 through June 30) of reportable salary. The 10% annual increase cap applies — no single year in the FAS calculation can exceed the average of the prior two years by more than 10%.

This was never changed for Tier 5 the way it was for Tier 6. Tier 6's FAS was originally a five-year average and was aligned to three years by the 2024 reform. Tier 5 always had the three-year calculation.

Contribution Rate: 3.5% for Your Entire Career

Tier 5 members contribute 3.5% of gross salary for the full duration of their employment. Unlike Tier 4 members, whose contributions stop after 10 years, Tier 5 contributions never end. You pay 3.5% on every paycheck until you retire or separate.

This is a flat rate, not a bracket — unlike Tier 6's variable 3% to 6% rate that depends on salary level. Whether you earn $50,000 or $150,000, the Tier 5 rate is 3.5%.

Pension Factor

The Tier 5 pension factor follows the same structure as Tiers 2 through 4:

• Under 20 years of service: 1.67% of FAS per year
• 20 to 30 years: 2.0% of FAS per year
• Over 30 years: 1.5% of FAS per year

A member with 30 years of service earns a pension factor of approximately 53.3% of FAS before any age reductions. With 35 years, it reaches approximately 60.8%.

Where Tier 5 Sits in the Bigger Picture

Tier 5 lasted just over two years before Tier 6 replaced it. Many Tier 5 members are now mid-career — roughly 14 to 16 years of service in 2026 — and approaching the point where retirement planning becomes concrete.

If you are comparing your Tier 5 rules to what colleagues in Tier 4 or Tier 6 have, the differences that matter most are the reduction schedule (steeper than Tier 4) and the unreduced-with-30-years age (57, versus 55 for Tier 4 and 58 for Tier 6).

The NYSTRS Retirement Guide includes side-by-side tier comparison tables and worked benefit calculations so you can see exactly how your Tier 5 pension stacks up.

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