Updated October 30, 2026. Quick answer: Kentucky TRS 4 members, who entered on or after January 1, 2022, can retire with unreduced benefits at age 57 with 30 years of service, age 60 with 10 years, or age 65 with five years. They can also retire at 57 with 10 years, with a penalty of up to 18%. The account is vested once five years of creditable Kentucky service are completed. TRS 1, 2 and 3 members, who entered through December 31, 2021, get an unreduced benefit at any age with 27 years or at 60 with five years.
Which members this covers
“This informational bulletin is for TRS 4 members who entered TRS on or after Jan. 1, 2022.”
TRS 4 retirement eligibility
“TRS 4 members are eligible for service retirement with unreduced benefits at age 57 with 30 years of service, age 60 with 10 years of service or age 65 with five years of service.” “TRS 4 members also are eligible for service retirement subject to penalties of up to 18% at age 57 with 10 years.”
The TRS 4 penalty
“The standard penalty is a reduction of 6% for the lesser of each year that the member’s age is below 60 or that the service is less than 30 years with a maximum penalty of 18%.”
Vesting
“A retirement account is vested once five years of creditable Kentucky service are completed.”
TRS 1, 2 and 3
“The requirements for an unreduced retirement benefit are either any age with 27 years of service credit or age 60 with at least five years of service credit.” “TRS 1 and TRS 2 members are eligible for a reduced retirement benefit at age 55 with at least five years of service credit. The reduction is 5% for each year under age 60 or under 27 years of service, whichever is less.” “TRS 3 members are eligible for a reduced retirement benefit at age 55 with at least 10 years of service credit. The reduction is 6% for each year under age 60 or under 27 years of service, whichever is less.”
What the pension is based on
TRS 4 uses age and career factors. “For non-university members, the age factor is 1.7% from age 57 to 60 and then increases monthly to 1.9% at age 65.” “For all members, the career factor is 0.25% from 20 to 29.99 years of service or 0.5% at 30 or more years of service.” “Final average salary is the average of the highest five salaries.” For TRS 1 to 3: “Final average salary is the average of the highest five salaries until the member reaches at least 27 years and age 55, when the average of the highest three salaries are used.”
A worked example with invented numbers
Take an invented non-university TRS 4 member retiring at 57 with 30 years of service, using the 1.7% age factor plus the 0.5% career factor (2.2% in all, computed). That is 30 years at 2.2%, or 66% (computed) of a final average salary of $60,000 (invented, for the computation), which comes to $39,600 a year (computed).
Now take a TRS 4 member retiring at 57 with 10 years of service. The reduction is the lesser of 3 years under age 60 at 6% each, which is 18% (computed); and 20 years under 30 years of service at 6% each, which is 120% (computed), so it is 18% (computed).
What the documents do not say
The multiplier charts are tables, so the example uses only the age factor and career factor the plan description states in prose, and university multipliers and the TRS 1 to 3 multipliers for service over 30 years are not covered. No Rule of N appears in any KTRS document read. Vesting for TRS 1, 2 and 3 is not stated in the documents read, and the Kentucky Revised Statutes were not read, so the bulletins are the sources.
Common mistakes
- Using the TRS 1 to 3 rule of 27 years at any age for a TRS 4 member. TRS 4 needs age 57 with 30 years.
- Applying the 18% penalty to every early retirement. It is the maximum, and it applies to the lesser of the years under 60 or under 30 years of service.
- Counting on university multipliers. The example here uses the non-university factors.
Related: Kentucky TRS retirement decisions, the Kentucky TRS COLA for 2027, how public pension decisions work, and whether Kentucky taxes pensions.
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Answer againSources
- Teachers’ Retirement System of the State of Kentucky, TRS 4 Service Retirement information sheet: trs.ky.gov
- Teachers’ Retirement System of the State of Kentucky, TRS 4 Summary Plan Description: trs.ky.gov
- Teachers’ Retirement System of the State of Kentucky, TRS 1, TRS 2 and TRS 3 Service Retirement information sheet: trs.ky.gov
- Related official page (not quoted): IRS Tax Topic 410, Pensions and annuities: www.irs.gov
- Related official page (not quoted): IRS Tax Topic 411, Pensions: the General Rule and the Simplified Method: www.irs.gov
Read from the primary documents linked above on October 30, 2026. General information, not tax advice. Your own facts decide the outcome, and a preparer or the IRS itself is the right place to confirm anything consequential.