What is the best construction bidding site?

There is no single best site, because the work is spread across federal, state, and local sources. For federal work, start with SAM.gov. For state and local work, go straight to your state DOT portal, your state procurement system, and your local government bid boards, which are free. Paid aggregators like Dodge, ConstructConnect, BidNet Direct, and PlanHub are worth it once you are bidding enough volume that the time they save outweighs the subscription cost.

How do I find construction jobs to bid on for free?

Most government work is free to find. SAM.gov for federal, your state DOT and state procurement portals, and your local city, county, and school district bid pages all post opportunities at no cost. Free tiers on aggregators like DemandStar and Public Purchase can cover a single state or agency. You generally only pay when you want wider multi-state coverage or automated bid alerts.

Do I need a license to bid on public construction work?

In most cases yes. Public agencies typically require the appropriate contractor license for the work, and many require you to be prequalified or registered before you can bid. Requirements vary by state and by agency, so confirm the specific requirements with the awarding authority and your state licensing board before you bid.

Do I need a bond to bid on government construction jobs?

Almost always. Public projects usually require a bid bond just to submit, and the winning contractor must post performance and payment bonds before signing. Federal projects follow the Miller Act; state and local projects follow their state's Little Miller Act, each with its own dollar threshold.

How much does it cost to get bonded for a bid?

Bid bonds are typically issued at no direct premium as part of your bonding program. For performance and payment bonds, the cost generally runs a small percentage of the contract value for qualified contractors. Build that into your bid like any other cost of doing the work.

What is a surety bond?

A surety bond is a three-party agreement that guarantees you will do what you promised. You are the principal, the party requiring the bond is the obligee, and the surety company backs your promise. If you do not perform, the surety pays the obligee and then collects that money back from you. A surety bond is not insurance.

What is the purpose of a surety bond?

It protects the obligee, not you. The bond guarantees that you will finish the job, pay your subcontractors and suppliers, or follow the laws tied to your license. If you fall short, the obligee has financial recourse through the bond.

Who are the three parties to a surety bond?

The principal (you, the contractor or business that buys the bond), the obligee (the project owner, government agency, or general contractor that requires it), and the surety (the bond company that guarantees your performance and pays valid claims).

Is a surety bond insurance?

No. Insurance protects you against your own losses. A surety bond protects the other party against your failure to perform, and if the surety pays a claim, you reimburse it in full. Think of a bond as a line of credit backing your promise, not a policy that absorbs your loss.

What does a surety bond cost?

You pay a premium, not the full bond amount. License and permit bonds are often a flat annual premium in the low hundreds of dollars. Contract bonds (bid, performance, and payment) typically run about 1% to 3% of the contract value for contractors with solid financials. Your bond type, credit, experience, and financial strength drive the rate.

What credit score is needed for a surety bond?

There is no single cutoff. Many license and smaller commercial bonds approve quickly with credit in the 600s, and bad-credit bond programs exist below that at a higher rate. Larger contract bonds look at your full financial picture, not just your credit score. At Grit, our job is to find the path to yes.

What are the disadvantages of a surety bond?

The main one: it is not insurance. If a claim is paid, you pay it back. You also pay a premium each term, and qualifying for larger bonds means sharing financial information with the surety. The upside is that bonding unlocks bigger jobs and public work you could not bid otherwise.

Who needs a surety bond?

Contractors bidding public construction almost always need them. The federal Miller Act requires bonds on federal projects over $150,000, and every state has a Little Miller Act for state and local work. Many private owners require bonding on larger jobs, and most states require a license or permit bond to hold a contractor's license.

Bonds & Surety› Find Construction Work to Bid › Illinois

How to Find Construction Work to Bid On in Illinois

Illinois DOT, state, and local bid sources - plus the bond you need to win the work

The short answer for Illinois

Public construction work in Illinois is posted in four places: IDOT (Illinois Department of Transportation) for highway and civil work, BidBuy (the state's eProcurement system) for state agency projects, your local city, county, and school district bid boards, and SAM.gov for federal work. Most are free to search. To win the work you will usually need a bond - Illinois requires a bond on general public works contracts over $150,000 (and IDOT or Tollway work over $500,000).

Finding public construction work in Illinois

If you build in Illinois and want into public and commercial work, the jobs are not hidden - they are advertised in the open, and most of the sources are free. Here is where to look, who runs each one, and the bond you will need to actually win the work.

Before you bid in Illinois: Illinois runs state procurement through BidBuy - vendors register free (no renewals) to receive notifications and submit bids. Register in BidBuy

Illinois highway and civil work: IDOT (Illinois Department of Transportation)

IDOT posts highway lettings on its Letting and Bidding portal (about seven lettings a year), with electronic bids through iCX. Prime contractors must be prequalified (Form BC 8, filed at least 21 days before a letting). See the prequalification requirements.

Start here: IDOT (Illinois Department of Transportation) bidding.

Illinois state agency work: BidBuy (the state's eProcurement system)

State agencies, universities, and many other public bodies in Illinois post their construction solicitations through BidBuy (the state's eProcurement system). You can browse opportunities there, and you will usually need to register to download documents or submit a bid.

Go to: BidBuy (the state's eProcurement system).

Illinois local government work: city, county, and school district bid boards

This is where most contractors should start. Cities, counties, school districts, and special districts build constantly and have to advertise it publicly. The jobs are smaller, the competition is thinner, and the bonding is more reachable for a growing company. Major Illinois bid boards:

More Illinois bid sources

Transit and water agencies

Schools, colleges, and universities

Builders exchanges and plan rooms

Weighing a paid platform to find leads faster? See our comparison of construction bid sites and plan rooms - free and paid.

Federal work in Illinois: SAM.gov

Every open federal construction contract is posted on SAM.gov, and it is free to search and register. You need an active registration and a Unique Entity ID before you can bid. Federal jobs over $150,000 require performance and payment bonds under the Miller Act - see our Miller Act guide.

The bond you need to bid public work in Illinois

Illinois requires a performance and payment bond on general state and local public works contracts over $150,000, and on IDOT or Illinois Tollway work over $500,000 (30 ILCS 550). The obligee sets the bond amount. Note: on January 1, 2029 the general threshold is scheduled to revert to $50,000. (30 ILCS 550.) Below those points many jobs still require a bid bond just to submit. The bottom line: if you want public work in Illinois, you have to be bondable.

That is where contractors lose jobs to competitors who are no better at the work - the other bidder could produce the bond and they could not. It is usually more reachable than contractors assume. If you are not sure where your bonding stands, start with what a surety bond is, see how contractors qualify, or read the full national guide on how to find construction work to bid on.

Illinois certification programs

Illinois certifies firms through the Business Enterprise Program (BEP, administered by the Commission on Equity and Inclusion) and the federal DBE program via the Illinois Unified Certification Program. Federal DBE rules changed in late 2025 - confirm current status and eligibility before relying on it.

See where your bonding stands in Illinois

The work is out there. The bond is what lets you win it. Take the Grit Bond Scorecard to see where your bonding readiness stands and what to work on to grow your limits - or call our bond team and we will walk through it with you.

Take the Bond Scorecard

Call the Grit team: (801) 505-5500

Illinois construction bidding FAQ

Where do I find construction jobs to bid on in Illinois?

Start with IDOT (Illinois Department of Transportation) for highway and civil work, BidBuy (the state's eProcurement system) for state agency projects, and your local city, county, and school district bid boards. For federal work, use SAM.gov. Most are free to search.

Do I need to be prequalified to bid public work in Illinois?

What bond do I need for public construction work in Illinois?

Illinois requires a bond on general public works contracts over $150,000 (and IDOT or Tollway work over $500,000) (30 ILCS 550), and many jobs require a bid bond to submit. If you are not bonded yet, that is the first thing to solve - take the Bond Scorecard or call (801) 505-5500.

A note on the details: Bidding rules, registration steps, and bond thresholds change over time and vary by project and by awarding agency. Use this page as a starting map, not legal advice. Always review the specific requirements in each bid solicitation and confirm the current rules with the awarding authority before you bid.

This page is part of Grit's national guide on how to find construction work to bid on.