TRS Illinois · Social Security

Your TRS Illinois pension and Social Security

Most Illinois teachers don't pay into Social Security on their teaching pay. Here's what the TRS Illinois guides say.

Illinois specificsShort answer: Illinois teachers in TRS Illinois don't pay Social Security tax on teaching pay, and TRS Illinois never reduces a pension because of Social Security. If you were hired after March 31, 1986 you pay the 1.45% Medicare tax. Your TRS Illinois pension is the main benefit, so estimate it in the calculator; Medicare and TRIP are on retiree health, and taxes on the taxes page.

Active TRS Illinois members do not contribute to Social Security on TRS-covered earnings. TRS Illinois never reduces benefits because of Social Security. The Social Security Fairness Act changed the WEP and GPO; contact SSA. Tier 1 Guide p. 26, Ch. 13 Medicare and Social Security; TRS Illinois Tier 2 slides, slide 47

Public employees hired after March 31, 1986 pay the 1.45% Medicare tax (employer pays 1.45% too). Tier 1 Guide p. 26, Medicare; Tier 2 Guide p. 25

Ask Social SecurityTRS Illinois doesn't figure Social Security benefits. If you have Social Security from other work, check your own benefit with the Social Security Administration.

What the guides say

Questions

Do Illinois teachers pay Social Security?

Not on TRS Illinois-covered pay. Teachers hired after March 31, 1986 do pay the 1.45% Medicare tax.

Does TRS Illinois reduce my pension for Social Security?

No. TRS Illinois never reduces benefits because of Social Security.

What about the WEP and GPO?

The Social Security Fairness Act changed them. Contact the Social Security Administration about your own benefit.

Source: TRS Tier 1 and Tier 2 Member Guides, September 2026, Tier 1 Guide p. 26; Tier 2 meeting slide 47; Tier 2 Guide p. 25. Last reviewed .