Last Updated: April 2026 by the ZipBonds Team
If you’re a contractor working on public or large commercial projects in Illinois, construction bonds may be required before work can begin.
Illinois projects commonly require:
- Bid bonds during competitive bidding
- Performance bonds once a contract is awarded
- Payment bonds to protect subcontractors and suppliers
These requirements primarily apply to public works projects. However, many private developers across Illinois also require contractors to be bonded to reduce financial risk.
As of 2026, Illinois law requires bonding on many public projects exceeding $150,000, although requirements can vary by agency and project type.
ZipBonds helps contractors across Illinois secure fast approvals, competitive rates, and expert support for construction bonds of all sizes.
Quick Summary: Illinois Construction Bond Requirements
- Illinois public works projects typically require performance and payment bonds for 100% of the contract amount.
- Bid bonds are often required during the bidding process.
- The Illinois Public Construction Bond Act, as updated by Public Act 103-570, governs bonding requirements in the state.
- Until January 1, 2029, performance and payment bonds will be required for public works projects exceeding $150,000.
- After January 1, 2029, the threshold is scheduled to revert to $50,000.
- Illinois Department of Transportation (IDOT) and Toll Highway projects require bonds for contracts exceeding $500,000 until 2029.
- Local government entities may still require bonds on smaller projects by ordinance or resolution.
- Many private projects also require bonding, depending on the project’s size and the developer’s requirements.
Illinois Construction Bond Requirements (Legal Overview)
In Illinois, public construction bonding requirements are governed by the Illinois Public Construction Bond Act (30 ILCS 550), as updated by Public Act 103-570.
- Until January 1, 2029, contractors working on public works projects exceeding $150,000 must furnish performance and payment bonds.
- After January 1, 2029, the threshold is scheduled to revert to $50,000.
- For Illinois Department of Transportation (IDOT) and Toll Highway Authority projects, the threshold is $500,000 through 2029.
- Local government entities may require bonds on smaller projects by ordinance or resolution.
- You must provide these bonds before work begins or at the time of contract award.
- The purpose is to protect the public entity (project owner) and subcontractors, laborers, and suppliers.
Performance and payment bonds may be issued as separate bonds or combined into a single instrument and are typically required for 100% of the contract amount.
Unlike some states, Illinois law focuses primarily on performance and payment bonds, while bid bond requirements are specified in project bid documents rather than in statute. Additionally, Illinois law requires that a surety company licensed by the Illinois Department of Insurance issue all construction bonds. The surety must also meet minimum financial strength requirements, typically an A- or better rating from a recognized rating agency such as A.M. Best, S&P, or Moody’s.
⚠️ Important: Illinois bonding thresholds are temporarily increased through January 1, 2029. Contractors should be aware that requirements are scheduled to become more stringent after this date.
For a deeper breakdown of how these requirements impact approvals and contractor capacity, see our Performance Bond Guide.
Construction Bond Comparison Table
| Requirement | Illinois Standard (2026) |
|---|---|
| Bond Threshold | $150,000 (until 2029) |
| Future Threshold | $50,000 (after 2029) |
| IDOT/Tollway Threshold | $500,000 |
| Bond Amount | Typically 100% |
| Bid Bond | 5–10% of bid |
What types of construction bonds are mandatory in Illinois?
1. Bid Bond
A bid bond guarantees that:
- You will honor your bid if selected
- You will provide the required performance and payment bonds
In Illinois public bidding, bid bonds are commonly required at 5%–10% of the total bid amount, depending on the project and agency. If you fail to move forward after winning the bid or cannot provide the required bonds, the project owner may file a claim.
2. Performance Bond
A performance bond guarantees that:
- The contractor completes the project according to contract terms
- The project owner is financially protected if you default
This bond protects the public entity or private developer.
3. Payment Bond
A payment bond guarantees that:
- Subcontractors, suppliers, and laborers are paid
- Lower-tier parties can file a claim if unpaid
This is especially important on public projects where mechanics’ liens are not available.
4. Illinois Contractor License Bond
Illinois does not require a statewide contractor license bond for general contractors. However, many cities and municipalities require license bonds as part of their contractor licensing process.
Certain trades, such as plumbing and roofing, may have additional state-level requirements.
Learn more about Illinois contractor license bond requirements.
How much do Illinois construction bonds cost?
Construction bond costs in Illinois depend on:
- Project size (bond amount)
- Contractor financial strength
- Experience and track record
- Credit score
Typical Cost Range:
- 0.5%–3% of the total bond amount for well-qualified contractors
- Higher rates for new businesses, lower credit, or higher-risk projects
Example:
- $500,000 project → ~$2,500–$15,000 bond cost
Apply in minutes to get a fast, competitive quote from ZipBonds.
How to Get a Construction Bond in Illinois
Getting bonded in Illinois is simple with ZipBonds:
Step 1: Apply Online
Submit a short application with basic business and project details.
Step 2: Submit Supporting Documents (if needed)
For larger projects, you may need:
- Business financial statements
- Work-in-progress (WIP) schedule
- Project details and contract information
- Resume of completed projects
- Personal financials (for larger bonds)
Step 3: Get Approved
We approve many bonds within 24 hours — often the same day.
Step 4: Receive Your Bond
Once approved and paid, your bond is issued and ready for submission.
Bond Forms & Submission Requirements in Illinois
Many Illinois public agencies require bonds to be submitted on specific forms, such as AIA bond forms or agency-specific templates.
Submitting the incorrect bond form can delay project approval, so it’s important to confirm requirements in the bid or contract documents.
Do private projects require construction bonds in Illinois?
Yes, many private developers in Illinois require bonds. You may need construction bonds for:
- Commercial developments
- Large residential builds
- Public-private partnership projects
Private bond requirements vary by contract but often mirror public project standards. Unlike public projects, private construction bond requirements are entirely contractual. Some developers require performance and payment bonds for 100% of the contract value, while others may require reduced coverage or no bonding at all.
Why Contractors Choose ZipBonds
- Fast approvals — many bonds issued the same day
- Direct access to surety experts
- Competitive rates across all contractor profiles
- Solutions for complex or hard-to-place risks
- Licensed in all 50 states
Common Reasons Construction Bonds Get Denied
Construction bond approvals depend on financial strength, experience, and project fit. Common reasons for delays or denials include:
- Limited financial history or weak financials
- Low credit score
- Taking on a project larger than past experience
- Incomplete or inaccurate application information
ZipBonds works with contractors to overcome these challenges and find the best available bonding options. Call us at (888) 435-4191 or email support@zipbonds.com to speak with an agent about your options.
What happens if someone files a claim on my bond?
If a contractor fails to meet contractual obligations or pay subcontractors, the project owner or affected parties may file a claim against the bond.
The surety will investigate the claim and may:
- Pay valid claims
- Arrange for project completion
- Seek reimbursement from the contractor
Claims are relatively rare among qualified contractors, but they highlight the importance of strong financials and project management.
How to Get a Construction Bond in Illinois
- Submit a bond application
- Provide financial and project details
- Underwriting review
- Approval and rate determination
- Bond issuance
- File bond with the project owner
ZipBonds helps contractors move through this process efficiently. We also offer a 3-minute pre-qualification process to help you get the bonds you need as quickly as possible.
FAQs About Illinois Construction Bonds
No. As of 2026, under Illinois law, construction bonds are typically required for public works projects exceeding $150,000. This threshold is scheduled to revert to $50,000 after January 1, 2029, and local agencies may require bonds on smaller projects.
No. Bid bonds are usually required by project bid documents, not state statute.
As of 2026, Illinois generally requires performance and payment bonds for public works projects exceeding $150,000 under Public Act 103-570. This threshold is scheduled to revert to $50,000 after January 1, 2029. Certain agencies, such as IDOT and the Toll Highway Authority, use a higher threshold of $500,000 through 2029.
Many Illinois construction bonds are issued the same day or within 24 hours.
Strong credit helps secure the best rates, but options are available for contractors with lower credit.
Apply for a Construction Bond Today
Need a performance and payment bond for your next project? Gather essential information like your bid amount, bid date, business history, and credit score, and we’ll do the rest. Select your state below to begin our simple bonding process. Call (888) 435-4191 or email support@zipbonds.com to speak directly with an agent.
About ZipBonds.com
Founders Ryan Swalve and Zach Mefferd formed the vision for ZipBonds.com when they realized how overly complicated it was to help clients place surety. The frustration of being unable to incorporate the technology they’d used in other insurance-focused projects left them thinking “there has to be a better way.”
Fast forward a couple of years, and that better way is the impetus of everything we do at ZipBonds. We constantly look for innovative ways to improve the bonding process for our clients and agents. Our team comprises individuals who understand all angles of surety – for companies, agencies, and individuals. Incorporating everyone’s point of view to improve the process while simultaneously integrating cutting-edge technology is what sets our business apart.