Illinois
Has state requirement OA state
Apprenticeship Administration
Office of Apprenticeship (OA) — Office of Apprenticeship — federal DOL administers apprenticeship program
Requirement Details
| Type | utilization |
| Ratio / Percentage | Varies by trade |
| Description | Apprentice utilization required on public works; specific percentages set by IDOL |
| Project Threshold | $0 |
| Statute | Illinois Prevailing Wage Act (820 ILCS 130) |
| Penalty | Penalties under prevailing wage act |
| Enforcement | Illinois Department of Labor (IDOL) |
Illinois ties apprenticeship requirements to the prevailing wage law. The Illinois Department of Labor sets trade-specific ratios.
Exemptions
- Residential projects under certain thresholds
- Emergency work
Trade-Specific Ratios
| Trade | Ratio | Source |
|---|---|---|
| Electricians | 1:3 | IDOL apprentice ratios |
| Plumbers | 1:3 | IDOL apprentice ratios |
Federal IRA Requirement
15% apprentice labor hours on IRA/IIJA-funded clean energy projects over $1 million
Threshold: $1,000,000
IRS guidance
Sources
- https://www.ilga.gov/legislation/ilcs/ilcs3.asp?ActID=1567
- https://labor.illinois.gov/laws-rules/conmed/apprenticeship.html
Last verified: 2026-02-06