Illinois TRS Creditable Earnings: What Counts Toward Your Pension

Why this term matters more than it sounds

"Creditable earnings" is the pay figure Illinois TRS uses for two things: how much you and your employer contribute each year, and the salary average that goes into your pension formula. If a payment is not creditable, it does not raise your pension no matter how large it is.

This is why your pension estimate can differ from your gross pay. TRS is not averaging your W-2. It is averaging the specific compensation categories the Illinois Pension Code lets it count.

What generally counts, and what generally does not

Base salary is always creditable. So are most payments for work you actually perform: summer school, coaching and club stipends, department-head pay, extended contract days, and homebound instruction. Board-paid member contributions (the district "picking up" your TRS contribution) are also creditable in most contracts. Creditable pay is still subject to tier-specific pension limits: for Tier 2, the salary cap is $129,192.26 for the 2026–27 school year, so additional earnings above that cap do not increase the pensionable salary used in the benefit calculation.

On the other side, TRS generally excludes payments that are not for services rendered: lump sums for unused sick or vacation days, bonuses conditioned on retiring or resigning, most insurance and fringe benefits, expense reimbursements, and severance. A payment relabeled to look like salary in a member's last year gets close scrutiny.

The 6% employer-contribution rule, in plain terms

Illinois generally requires an employer contribution when a salary increase of more than 6% at the same employer raises the final average salary used to calculate a retiring member's pension. TRS calculates the actuarial cost of the added benefit and bills the employer; this is not a deduction from the member's pension. The threshold was briefly lowered to 3% in 2018, then restored to 6% in 2019.

Effective July 10, 2026, Public Act 104-0544 added permanent exemptions for qualifying overload, summer-school, and classroom-instruction stipend increases. These exemptions apply only to the portion attributable to classroom instruction by a full-time teacher, and employers must submit TRS's Salary Exemption Affidavit after receiving an eligible bill. For example, coaching and club sponsorship stipends do not qualify under the new classroom-instruction exemption. Ask the district or TRS about the specific pay item and whether it qualifies.

Certain increases are exempt, such as those required by a previously ratified collective bargaining agreement or by law, and increases due to a genuine change in position or duties. If your final-years pay is going to jump, ask your district and TRS how the increase will be treated before you sign.

How to protect your own estimate

Check your Member Account Access statement each year and compare the reported creditable earnings to what you think you earned. Reporting errors are easiest to fix in the year they happen, not at retirement.

If you are planning to add stipends or a summer assignment in your final four to eight years to lift your average, confirm two things first: that the pay is creditable, and whether an increase over 6% creates an employer contribution or qualifies for a current exemption. A large but non-creditable payment does nothing for your pension; an increase that raises final average salary can trigger a charge to the employer.

• Verify reported creditable earnings on your annual TRS statement.
• Ask whether a specific stipend or assignment is creditable before counting on it.
• Model whether a final-year raise crosses the 6% line.
• Keep documentation for any position or duty change that justifies a larger increase.

The exemptions to the 6% rule

The 6% employer-contribution rule has exceptions, and the details depend on the increase and the employer's record. A new permanent exemption under Public Act 104-0544 applies to qualifying overload work, summer-school instruction, and certain stipends for classroom instruction for salary increases given on or after July 10, 2026. It covers only the portion attributable to classroom instruction performed by a full-time teacher; coaching and club sponsorship are not included in the new stipend exemption. The employer must submit a TRS Salary Exemption Affidavit within 30 days of the applicable Employer Bill to seek the exemption.

If your pay will rise sharply in your final years, ask your district and TRS whether the increase is creditable, whether it affects final average salary, and whether an exemption applies. TRS's new exemption process is handled by the employer, not the member.