# Illinois — Workers' compensation waiting periods and retroactive thresholds by US state

For Illinois, waiting period (days) is 3 lost workdays; retroactive trigger (days) is 14 calendar days; how days are counted is Lost workdays, not calendar days. TTD is not paid for the first three lost workdays unless the employee misses 14 or more calendar days due to the injury; statute or rule citation is 820 ILCS 305/8(a), recorded from its source on 2026-08-17.

- **State:** Illinois _(our reading, not quoted from the source)_
- **Waiting period (days):** 3 lost workdays _(verified: appears in the quote below)_
- **Retroactive trigger (days):** 14 calendar days _(verified: appears in the quote below)_
- **How days are counted:** Lost workdays, not calendar days. TTD is not paid for the first three lost workdays unless the employee misses 14 or more calendar days due to the injury. _(verified: appears in the quote below)_
- **Statute or rule citation:** 820 ILCS 305/8(a) _(our reading, not quoted from the source)_

## What the source says

> TTD is not paid for the first three lost workdays, unless the employee misses 14 or more calendar days due to the injury.

## Source

- https://iwcc.illinois.gov/content/dam/soi/en/web/iwcc/documents/handbook/IWCC%20handbook%2006.06.24.pdf

Last verified: 2026-08-17. Review by: 2027-08-17.
Part of [Workers' compensation waiting periods and retroactive thresholds by US state](https://referencesource.org/wc-waiting-periods-by-state/).