What is the difference between a conditional and unconditional lien waiver in Illinois?
Last reviewed July 5, 2026
In Illinois, a conditional lien waiver is valid only when payment is received. An unconditional lien waiver releases the lien right regardless of payment status. Use the conditional waiver when payment is pending and the unconditional waiver when payment is confirmed.
Key points
- Conditional waivers depend on payment.
- Unconditional waivers release lien rights immediately.
- Use conditional waivers for pending payments.
- Unconditional waivers confirm payment received.
Conditional waivers protect you by ensuring you only waive your lien rights after payment is received. Unconditional waivers are more straightforward but can be risky if payment does not follow. Always check the specific requirements in Illinois to avoid issues with lien rights.
How Alloovium helps
Alloovium helps track lien waivers and compliance with your project documents.
See how it worksRelated questions
- Can a subcontractor file a lien without a written contract in Illinois?
- Do I need to send a preliminary notice before filing a lien in Illinois?
- How long does a mechanics lien last in Illinois?
- How much retainage can be withheld on a construction project in Illinois?
- What are the prompt payment rules for construction in Illinois?
- What is the deadline to file a mechanics lien in Illinois?
General information for US construction professionals — not legal advice. Lien deadlines, retainage caps and notice rules vary by state; verify with the state statute or a construction attorney.