Avoid a $75,000+ loss from a missed deadline
Illinois Lien Deadlines for Material Suppliers
Illinois requires a Notice of Intent to Lien within 90 days of your last furnishing. For single-family owner-occupied projects, notice is due within 60 days of starting work.
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Illinois is High Risk for Suppliers
Illinois has a 90-day Notice of Intent to Lien requirement from last furnishing. However, if you are working on a single-family owner-occupied project, you must provide notice within 60 days of starting work. Missing these notices puts your lien rights at risk.
Illinois Mechanics Lien Deadlines (Updated 2026)
| Deadline Type | Timing | Details |
|---|---|---|
| Preliminary/Notice | Notice of Intent to Lien — within 90 days of last furnishing | Required. |
| Special Notice | Within 60 days of starting work | For single-family owner-occupied projects. |
| Lien Filing | 4 months after completion | Must file lien by 4 months after completion. |
| Enforcement | 2 years after completion | Suit to enforce must be filed within 2 years after completion. |
| Statutes | 770 ILCS 60/7; 770 ILCS 60/21 |
Common Supplier Mistakes in Illinois
Missing the 90-Day Notice
Failing to send the Notice of Intent to Lien within 90 days of your last furnishing is a critical error.
Missing the 60-Day Residential Notice
On single-family owner-occupied projects, you must send notice within 60 days of starting work, not just 90 days from last furnishing.
Late Lien Filing
The lien must be filed 4 months after completion. Missing this deadline invalidates the lien.
Missing Enforcement Deadline
Enforcement must occur within 2 years after completion.
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Frequently Asked Questions
When must the lien be filed?
4 months after completion.
What is the enforcement period?
2 years after completion.
What statutes apply?
770 ILCS 60/7; 770 ILCS 60/21.
When is the Notice of Intent to Lien due?
Within 90 days of last furnishing.
Is there a special rule for residential projects?
Yes, for single-family owner-occupied projects, notice is due within 60 days of starting work.
Disclaimer: This content is for informational purposes only and does not constitute legal advice.