Bottom line
Illinois TRS can convert eligible unused, uncompensated sick leave into retirement service credit at 170 days per year, up to two years. The key is whether the days were truly available for illness and properly certified by the employer.Key facts
- Illinois TRS divides reportable unused sick leave days by 170 to determine added service credit
- The maximum sick-leave service credit is two years, equal to 340 days
- Days paid out as reportable creditable earnings generally cannot also be counted as sick-leave service credit
What Illinois TRS means by creditable sick leave
Illinois TRS grants service credit at retirement for unused, uncompensated sick leave that an employer properly certifies. The days must have been genuinely available for the member to use in the event of illness. This is not a general conversion of every leave balance on a district record. Vacation days, certain restricted leave banks and days created only to inflate retirement service can fail the TRS test even if an employer’s local payroll system displays them as leave.
The basic conversion is straightforward: divide the reportable number of sick leave days by 170. TRS caps the result at two years, or 340 days. That service credit can affect a retirement calculation when the additional service increases the member’s total credit, but the actual benefit impact depends on the member’s tier, formula and retirement record. Use the TRS Benefits Report and retirement estimate rather than assuming a fixed dollar value per sick day.
Why payment for unused sick leave changes the answer
TRS distinguishes uncompensated sick leave from a lump-sum payment that is reportable as creditable earnings. If the payment for unused sick leave is reportable to TRS as creditable earnings, the days used in that payment calculation are considered compensated and are not also reportable for service credit. The rule prevents the same leave from being counted twice: once as salary-related earnings and again as extra service.
If a lump-sum payment is not reportable to TRS as creditable earnings, the associated days may still be considered uncompensated and reportable for service credit when the other requirements are met. TRS summarizes the principle as either the days or the reportable payment being recognized, but not both and not neither. Because district contract language can affect when a payment is due and payable, confirm the employer’s reporting treatment before estimating your final service total.
How to verify sick leave before the retirement report is filed
Your last TRS employer certifies unused, uncompensated sick leave on the supplementary retirement report. For service before the 1987–88 school year, a former employer may need to complete a separate certification if you want those days considered. TRS advises members to review the Benefits Report to see whether prior employers have already reported unused sick leave. Do not wait until the retirement payment is calculated to discover that an old district record is missing.
Compare your district leave ledger with the TRS record and flag any converted personal leave, granted days, leave-bank credits or payment arrangements that might need explanation. Sick leave added near termination can be rejected if it was not actually available for use before retirement. If a former employer has closed or records are incomplete, ask TRS what documentation it will accept rather than inserting an estimated number into your retirement planning.
The 170-day conversion and two-year ceiling
TRS calculates sick-leave service credit by dividing reportable days by 170. For example, 170 qualifying days equal one year of additional service, while 340 qualifying days reach the maximum two-year credit. A partial balance can produce a fractional year, as TRS illustrates with 205 days producing 1.206 years. The conversion is mathematical, but only days that pass the eligibility and reporting rules belong in the numerator.
More than 340 otherwise qualifying days do not create additional sick-leave service credit under this rule. The credited service is not a cash account; it becomes part of the service record used under the applicable pension formula. Confirm the final amount on the TRS calculation because employer certifications and excluded days can change the total shown on a local leave statement.
| Reportable unused days | Service credit result | Key limitation |
|---|---|---|
| 85 days | 0.500 year | Only qualifying unused, uncompensated days count |
| 170 days | 1.000 year | Employer certification is required |
| 205 days | 1.206 years | TRS uses the reportable-day total divided by 170 |
| 340 days | 2.000 years | Maximum sick-leave service credit |
Granted days must have been realistically available for illness
TRS does not automatically accept extra sick days granted shortly before retirement. The system examines whether the days were actually available for use during the remaining employment period. If a district adds days at or near termination only to raise retirement service, those days can be rejected. TRS also excludes categories such as unused vacation and certain leave that can be used only for catastrophic or extended illness rather than ordinary sick leave.
The available-for-use test is particularly important in negotiated end-of-career arrangements. A member who already has enough sick leave to cover every remaining workday cannot necessarily receive a large late grant and turn all of it into service credit. Ask the employer when the days were added, what illnesses they could cover and how many paid workdays remained. The official TRS determination controls whether the added days are creditable.
What to do if an employer report looks wrong
Employers can revise supplementary reports when information such as sick leave, earnings or days paid was submitted incorrectly. If your retirement estimate or Benefits Report does not match the district’s certified balance, gather the leave ledger, final pay records and any former-employer certification before contacting TRS. The goal is to identify a reporting difference, not to choose whichever number produces the larger pension.
Pay close attention when unused leave is converted to a cash payment. Ask whether that payment was due and payable before or with the final paycheck or last day of employment, because TRS reporting guidance connects that timing to whether the payment is creditable earnings. A corrected report can change the service total, so keep the final employer certification with your retirement records and recheck the benefit calculation after any revision.
Before you make a decision
- Compare the sick leave balance on your district record with the balance already shown by Illinois TRS.
- Separate unused sick leave from vacation, restricted leave-bank days and other nonqualifying categories.
- Identify any sick leave that will be paid out and ask how the employer will report that payment to TRS.
- Request former-employer certification for older missing sick leave when TRS requires it.
- Calculate an illustrative credit by dividing qualifying reportable days by 170, capped at 340 days.
- Review the final supplementary report and retirement calculation for corrections before relying on the added service.
Frequently asked questions
How many sick days equal one year of Illinois TRS service credit?
Illinois TRS uses 170 reportable unused, uncompensated sick leave days for one year of service credit. Partial totals are divided by 170 to create fractional service. The days still must meet TRS eligibility and employer-reporting requirements, so a district leave balance is not automatically the same as the final TRS credit.
What is the maximum sick leave credit in Illinois TRS?
The maximum is two years of service credit, which corresponds to 340 qualifying sick leave days under the 170-day conversion. Additional leave beyond that ceiling does not create more sick-leave service credit. The pension effect depends on your tier and total service record, so confirm the final calculation with TRS.
Can I get paid for unused sick leave and also receive TRS service credit?
Usually not for the same days when the payment is reportable as TRS creditable earnings. In that situation, the paid days are treated as compensated and are not also reported for sick-leave service credit. If the payment is not reportable as creditable earnings, the days may still qualify if the other rules are met.
Do unused vacation days count as Illinois TRS sick leave credit?
TRS states that unused vacation days do not receive sick-leave service credit. Some converted or granted leave categories also fail if they were not actually available for ordinary illness before retirement. Review the exact leave type and employer reporting rather than combining every unused paid-leave balance into one number.
Who reports my unused sick leave to Illinois TRS?
Your last TRS employer reports eligible unused, uncompensated sick leave on the supplementary retirement report. Older service can require additional certification, particularly for periods before the 1987–88 school year. Check your TRS Benefits Report before retirement and ask former employers to correct missing information when documentation supports a change.
Official sources
Sources were reviewed on September 1, 2026. Rules and member records maintained by the retirement system control.
Illinois TRS — Service CreditOfficial source ↗Illinois TRS — Sick Leave ReportingOfficial source ↗Illinois TRS — Reporting RemindersOfficial source ↗This article provides general educational information. It is not a benefit determination or financial, tax, or legal advice. Confirm account-specific information with the retirement system.