Under California’s Public Contract Code, the competitive bidding rules require most government agencies to advertise construction projects publicly, take sealed bids, and award the contract to the lowest responsible bidder. The thresholds that trigger formal bidding, the licensing and registration you need before you can submit, and the protest window if you lose all shift depending on the type of agency and the size of the job.
When Formal Bidding Is Required
Not every public project needs a full sealed-bid process. For local agencies that have opted into the Uniform Public Construction Cost Accounting Act, three tiers apply under Public Contract Code sections 22032 and 22034:1California State Controller’s Office. Uniform Public Construction Cost Accounting Act FAQ
- $75,000 or less: the agency can use its own workforce, negotiate directly with a contractor, or issue a purchase order with no competitive bidding.
- $75,001 to $220,000: informal or formal bidding.
- Over $220,000: formal competitive bidding is mandatory.
School districts run on a separate, inflation-adjusted threshold. For contracts effective January 1, 2026, a school district governing board must competitively bid any contract exceeding $119,100 under Public Contract Code section 20111(a). School district “public projects” as defined by PCC section 22002(c) carry a much lower threshold of $15,000, which does not adjust for inflation.2California Department of Education. Bid Threshold Letter State agencies contracting through the Department of General Services follow Part 2 of the Public Contract Code, with competitive bidding generally required unless a specific statutory exemption applies.
What You Need Before You Can Bid
Three eligibility gates stand between you and a valid bid submission: a state contractor’s license, current DIR public works registration, and any prequalification the agency requires.
Contractor’s License
Any construction work in California valued at $1,000 or more in combined labor and materials must be performed by a contractor licensed through the Contractors State License Board, and you must hold the license before submitting the bid, not just before starting work. Bidding or performing without a valid license is a misdemeanor carrying up to six months in jail, a fine of up to $5,000, and administrative fines from $200 to $15,000 for a first offense.3Contractors State License Board. Get Licensed to Build Guide An unlicensed contractor also cannot enforce the contract in court, so you can finish the work and have no legal right to collect.
DIR Public Works Registration
Every contractor and subcontractor must register with the Department of Industrial Relations before bidding on or performing public works. Registration runs July 1 through June 30 and costs $400 per year, with two- and three-year options at $800 and $1,200. Bidding, being awarded, or working on a public project without current registration draws a $2,000 penalty. Contractors who let registration lapse and renew by September 30 may qualify for a reduced $400 penalty, but repeat violations within 12 months can bring disqualification from all public works for up to a year.4California Department of Industrial Relations. Contractor Registration
Prequalification
Some agencies require bidders to prequalify before they are allowed to submit. That typically means showing adequate financial resources, a record of similar completed projects, and satisfactory business ethics. The agency reviews bonding capacity, insurance, safety record, and past performance. Prequalification criteria must be spelled out in the bid documents; agencies cannot impose standards that were not disclosed in advance.
How the Bidding Process Runs
Notice and Advertisement
Public agencies must publish a notice inviting bids that describes the project, states the deadline for sealed bids, and identifies the time and place where bids will be opened.5California Legislative Information. California Public Contract Code 22037 State contracts are typically noticed through the California State Contracts Register and in general-circulation newspapers. The advertisement period is your window to review plans and specifications, walk the site, solicit subcontractor quotes, and put your numbers together.
Submission and Public Opening
Bids must arrive sealed, by the stated deadline. Late bids are rejected regardless of the reason. On the designated date the agency opens every bid publicly and reads the numbers aloud, so any interested party can verify the results. The public opening is one of the core transparency mechanisms in the system.
Award to the Lowest Responsible Bidder
After opening, the agency reviews each bid for compliance with the solicitation and awards the contract to the lowest responsible bidder: the contractor with the lowest price who also meets every qualification and compliance standard set by the agency.6California Legislative Information. California Public Contract Code 20103.8 “Responsible” is doing real work in that phrase. The agency looks at financial stability, past performance, current workload, licensing status, and compliance history. Low price alone doesn’t win the job if the agency finds you lack the capacity or integrity to perform.
The agency may also add or deduct alternates after identifying the lowest responsible bidder, provided the additive or deductive items were included in the original bid documents.6California Legislative Information. California Public Contract Code 20103.8
Correcting a Mistake After Opening
If you find an error in your bid after opening but before award, you can request permission to correct it. You will need clear and convincing evidence that the mistake exists and what you actually intended to bid. If the correction would move you ahead of a previously lower bidder, the standard tightens further: both the mistake and the intended bid must be apparent from the bid documents themselves. Where the evidence shows a mistake but not what you meant to bid, you can request withdrawal instead of correction. The agency head or a designated official decides, not the contracting officer alone.
Subcontractor Listing on the Bid
Under California’s Subletting and Subcontracting Fair Practices Act, your bid must list every subcontractor who will perform work worth more than one-half of one percent of your total bid amount. The listing must include the subcontractor’s name, business location, California contractor license number, and DIR public works registration number.7California Legislative Information. California Public Contract Code 4104
This is where bids die. Failing to list a subcontractor who should have been listed, or trying to swap one out after award, carries serious consequences. Substitution of a listed subcontractor is permitted only on narrow statutory grounds, such as the subcontractor’s failure to execute a written contract, a licensing deficiency, or an inability to meet bonding requirements. The rule exists to prevent bid shopping, where a prime uses one subcontractor’s price to win the job and then pressures other subs to beat it after the award.
Bid Security and Bonds
Public agencies in California typically require three layers of financial security across the life of a project.
- Bid security, submitted with your bid to guarantee that you will enter into the contract if selected. For state contracts, the required amount is at least 10 percent of your bid, submitted as a bid bond, certified check, or other acceptable instrument. A bid without the required security is not considered.
- Performance bond, required after award, guaranteeing that you will complete the work per the contract. The bond amount is typically 100 percent of the contract price.
- Payment bond, also required after award, guaranteeing that subcontractors and material suppliers get paid.
Smaller contractors who cannot obtain bonding on the open market may qualify for the federal Small Business Administration’s Surety Bond Guarantee Program, which backs a portion of the surety’s risk. Eligibility requires that you qualify as a small business, that the bid solicitation expressly requires a bond, and that you cannot obtain one on reasonable terms without the SBA guarantee.8eCFR. 13 CFR Part 115 – Surety Bond Guarantee
Prevailing Wage Attaches to the Contract
Every worker on a California public works project must be paid at least the prevailing wage for their craft and classification in the county where the work is performed. The law applies broadly to construction, alteration, demolition, installation, and repair work done under the direction of a public agency, with no minimum dollar threshold, and it reaches preconstruction activities like site assessment and land surveying as well as postconstruction cleanup.9California Legislative Information. California Labor Code 1720
Compliance is not optional. Contractors and subcontractors must submit certified payroll records for each pay period, documenting every worker’s name, classification, hours, and wages. DIR investigates complaints and audits jobs. Underpayment brings back-wage liability plus penalties, and willful violations can trigger debarment from future public works. When federal funding is involved, the Davis-Bacon Act adds a second prevailing wage layer on federally funded construction contracts over $2,000; where both California and federal rates apply, you pay whichever is higher for each classification.10U.S. Department of Labor. Davis-Bacon and Related Acts
When Competitive Bidding Isn’t Required
The Public Contract Code carves out several categories of work.
Emergencies
When a sudden, unexpected event poses an imminent danger to life, health, property, or essential public services, an agency can bypass bidding. The Code defines “emergency” narrowly as a situation requiring immediate action to prevent or reduce serious harm.11California Department of General Services. Contracts Exempt From California State Contracts Register Advertising and Competitive Bidding – 1233 Poor planning and routine urgency don’t qualify, and the agency must document the circumstances and report to its governing board.
Architects, Engineers, and Related Professionals
California law prohibits using price as the initial selection factor when hiring architects, engineers, land surveyors, environmental consultants, and construction project managers. Under Government Code section 4526, they are selected on demonstrated competence and qualifications for the specific work, and only after the best-qualified firm is identified does the agency negotiate a fair and reasonable fee.12California Legislative Information. California Government Code 4526
Piggybacking and Cooperative Purchasing
An agency can sometimes skip its own bidding by using a contract another public entity already competitively bid. For this to work, the original contract must include language allowing other agencies to use its terms, the goods or services needed must fall within its scope, and it must still be active. Joint powers agreements between multiple public agencies can also pool procurement into a single competitive process.
Other Statutory Exemptions
The Department of General Services maintains a list of additional exemptions, including contracts with other government agencies, sole-source procurements where only one vendor can provide what is needed, and certain information technology acquisitions.11California Department of General Services. Contracts Exempt From California State Contracts Register Advertising and Competitive Bidding – 1233 Each exemption has its own documentation requirements, and stretching one past its statutory limits risks having the contract invalidated.
Protesting a Bid Result
If you believe the agency violated its own procedures or that the winning bidder should not have been selected, you can file a bid protest, and the timelines are short. Under the state’s Alternative Protest Pilot Project, an unsuccessful bidder must submit a written Notice of Intent to Protest within one to five working days after the agency posts its Notice of Intent to Award, depending on what the solicitation specifies. Miss that deadline and your right to protest is gone.13California Department of General Services. Bid Protest Regulations
After the notice, you have seven working days to submit a Detailed Written Statement of Protest with a $50 filing fee and an arbitration deposit to the Office of Administrative Hearings, and to serve the protest on all parties identified in the service list. The grounds are limited by statute: you can argue that the agency violated its solicitation procedures, or that your bid should have been selected under the stated criteria. A protest cannot be used to challenge the solicitation requirements themselves after the fact.13California Department of General Services. Bid Protest Regulations
Protests under this framework are resolved through binding arbitration by a neutral third party from the Office of Administrative Hearings. The arbitrator can administer oaths, issue rulings, and make a binding decision on the merits, and hearings are generally open to the public. Judicial review remains available if arbitration does not resolve the matter, but courts give substantial deference to agency procurement decisions and typically intervene only where an agency acted arbitrarily or clearly violated statutory requirements.