Illinois prompt payment
Prompt Payment in Illinois — Sources checked
Who and what this applies to
Private contracts within 815 ILCS 603/5: excludes public-fund contracts, single-family residences and multiple-family residences with 12 or fewer units in one building.
The rules
- For contract-compliant work and an approved payment application, the owner must pay within 15 calendar days after approval. Approval is deemed after 25 days from receipt unless the owner supplies a timely written withheld amount and reason. Source
- For contract-compliant, accepted subcontract work, each contractor/subcontractor must pass through the corresponding payment, including final payment and retainage, within 15 calendar days of receipt. Source
Primary sources
Sources reviewed 2026-09-30. This guide covers the projects and rules stated above.
Not legal advice. This is general legal information. Laws and project facts differ; confirm the applicable requirements for your project.
Back to Illinois contractor law · Prompt Payment topic guide.
Related tools and support
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