Teachers · Public Employees
Illinois Teacher Pension Calculator 2026
Teachers' Retirement System of Illinois (Tier II). See your exact monthly pension, vesting timeline, and COLA-adjusted income — free, no sign-up.
Pension multiplier
2.2%
Social Security
No ⚠️
Vesting
5 years
COLA
CPI-linked (up to 3.0%)
Your teacher pension breakdown
Select your state and fill in your details →
About the Teachers' Retirement System of Illinois (Tier II)
The Teachers' Retirement System of Illinois (Tier II) is Illinois's primary retirement plan for public school teachers. It is a <strong>defined benefit</strong> plan, meaning your retirement income is guaranteed by formula — not dependent on market performance.
Your monthly pension is calculated as: Years of Service × 2.2% × Final Average Salary (averaged over your highest 4 years). For example, a teacher with 30 years of service and a $70,000 final average salary would receive approximately $3,850/month before any deductions.
Vesting: You must complete 5 years of service to vest. Before that point, leaving the system means forfeiting your pension benefit entirely (though you can withdraw your own contributions).
Cost-of-living adjustments (COLA): The Teachers' Retirement System of Illinois (Tier II) provides a CPI-linked (up to 3.0%) COLA, helping your pension maintain purchasing power through retirement.
Employee contribution rate: Illinois teachers contribute 9.0% of their salary to the pension system each year.
Important note: Tier II (hired after Jan 1, 2011). FAS is highest 4 of last 5 years, capped at CPI growth.
Frequently Asked Questions
Does Illinois have Social Security for teachers?
No. Illinois teachers do not participate in Social Security. Your Teachers' Retirement System of Illinois (Tier II) pension is your primary guaranteed retirement income. If you have Social Security earnings from other employment, the Windfall Elimination Provision (WEP) will likely reduce those benefits.
How many years to vest in the Teachers' Retirement System of Illinois (Tier II)?
You need 5 years of service to vest. Once vested, you are entitled to a pension at normal retirement age even if you leave teaching before then.
What is the Illinois teacher pension formula?
Your monthly pension = Years of Service × 2.2% × Final Average Salary (highest 4-year average). A teacher with 30 years and $70,000 FAS earns ~$3,850/month.
Does the Teachers' Retirement System of Illinois (Tier II) have a COLA?
Yes — a CPI-linked (up to 3.0%) annual adjustment. Use the calculator above to see how COLA compounds your income over 10 and 20 years.
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