California Public Contract Code: Bidding, Bonds, and Compliance

The California Public Contract Code sets the rules every state and local agency follows when awarding and managing public works contracts, and it sets the corresponding obligations for anyone bidding on or performing that work. The core requirement is competitive bidding: once a project crosses the applicable dollar threshold, the agency must publicly advertise, take sealed bids, and award to the lowest responsible bidder. Around that core, the code layers rules on prequalification, subcontractor listings, bonding, labor registration, change orders, protests, and claims. Missing any of them can void a contract, forfeit a bond, or shut a contractor out of public work entirely.

When Competitive Bidding Is Required

The threshold that triggers formal bidding depends on which framework the agency operates under. Many cities, counties, and special districts have adopted the Uniform Public Construction Cost Accounting Act, which draws the line at $220,000. Projects above that require formal sealed bidding with public advertisement; projects at or below can use informal procedures, and very small jobs can be negotiated directly.¹

Counties operating under the older framework in Part 3 of the code face a formal bidding threshold of $10,000, with informal procedures available between $4,000 and $10,000.² State agencies follow Part 2, where the Department of General Services oversees procurement and contracts go to the lowest responsible bidder after public bid opening.

The principle is the same across frameworks. Once a project clears the threshold, the agency has to advertise, accept sealed proposals, and pick a winner based on price and ability to perform. Agencies cannot split a project into smaller pieces to slip under the threshold.

How Bids Are Evaluated

The default rule is to award to the lowest responsible bidder. That word “responsible” carries weight. An agency does not have to take the cheapest number if the bidder lacks the financial capacity, equipment, experience, or workforce to actually deliver the project on time and to specification.

Every construction bid must be sealed and accompanied by bid security equal to 10 percent of the bid, posted as cash, a cashier’s check, a certified check, or a surety bond. A winning bidder who fails to sign the contract within 15 days of written notice forfeits that security. Losing bidders get theirs back within 60 days of the award.³

Prequalification of Bidders

Some agencies filter contractors before bids are opened. Under PCC Section 20101, a public entity may require prospective bidders to submit a standardized questionnaire and verified financial statement covering their public works experience, then apply an objective, uniform rating system to decide who qualifies to bid and for what size of project.⁴

Rating criteria typically cover past performance, license status, bonding capacity, safety record, financial strength, and any history of defaults or liquidated damages. Prequalification can be run quarterly and remains valid for one calendar year. A contractor who receives a low or disqualifying rating has the right to challenge it before the bid deadline. The agency must explain its reasoning in writing, share any adverse evidence, and give the contractor a chance to respond.⁴

The questionnaires and financial statements are not public records. The names of contractors seeking prequalification are.

Subcontractor Listing Rules

The Subletting and Subcontracting Fair Practices Act targets bid shopping, where a prime contractor wins the job and then pressures subs to cut their prices.⁵

Any prime contractor bidding public work must list every subcontractor performing work that exceeds one-half of one percent of the total bid. The listing must include the subcontractor’s name, business location, California contractor license number, and public works registration number.⁵

Once a subcontractor is listed, substitution is narrow. The awarding agency may consent when the listed subcontractor refuses to sign a written contract at the bid price, becomes insolvent, fails to perform, cannot meet bond requirements, is not properly licensed, or is ineligible for public works under the Labor Code. A prime contractor can also seek substitution based on a clerical error in the original listing, but must prove it to the agency.⁶

Pass-through arrangements are not a workaround. A prime cannot list a single subcontractor who then sublets most of the work to avoid the listing requirement.⁵

Bonding Requirements

Bonds sit at three stages of a public works contract. For local agency construction contracts, the code requires:

Bid security of 10 percent of the bid amount, forfeited if the winning bidder does not sign the contract within 15 days.
A faithful performance bond of at least 25 percent of the contract price, securing completion to specification.
A labor and material bond of at least 50 percent of the contract price, protecting subcontractors and suppliers from nonpayment.³

State contracts under Part 2 require both performance and payment bonds equal to at least half the contract price. On projects exceeding $250 million, the Department of Transportation has discretion to cap the payment bond at $500 million rather than require a full 50 percent.⁷

These are minimums. An agency can set higher bond requirements in its specifications, which is why bonding capacity often appears as a prequalification factor.

Alternative Delivery Methods

Traditional low-bid contracting is the default, but the code authorizes several alternatives.

Design-Build

Design-build combines the architect and builder into a single entity. PCC Sections 6820 through 6829 authorize the method for transportation projects, allowing Caltrans and regional transportation agencies to award on either best value or lowest responsible bid.⁸ Local agencies can use design-build under PCC Section 22164, but the design-build entity and all subcontractors must commit to using a skilled and trained workforce for any work in an apprenticeable building trade. Proposals are evaluated on price, technical expertise, and life-cycle costs over 15 or more years.⁹

Job Order Contracting

Job order contracts cover repetitive, smaller-scale work such as facility repairs and remodeling. The agency sets a catalog of unit prices, and contractors bid adjustment factors applied to those prices. The code limits job order contracts to repair, remodeling, and other repetitive work. New construction is excluded.¹⁰

Prevailing Wage and DIR Registration

Every worker on a California public works project costing more than $1,000 must be paid at least the prevailing wage for their trade and location. The Director of the Department of Industrial Relations sets these rates, typically based on collectively bargained wages in the area.¹¹

Before bidding on or performing any public works, every contractor and subcontractor must register with the Department of Industrial Relations. Registration requires workers’ compensation coverage, a valid contractor’s license if applicable, no delinquent wage assessments, and no active debarments. The fee is $400 per year, with options to prepay two or three years at $800 or $1,200.¹²

Bidding on or performing public work without registering carries a $2,000 penalty on top of the registration fee. A lapsed registration draws a $400 penalty if accidental and $2,000 if not. A contractor caught twice within 12 months can be disqualified from all public works for up to a year.¹²

On projects requiring a skilled and trained workforce, including local agency design-build contracts, all workers in apprenticeable building trades must be skilled journeypersons or registered apprentices. For work performed from 2020 forward, at least 60 percent of skilled journeypersons must be graduates of an approved apprenticeship program, though carpenters, cement masons, operating engineers, roofers, and teamsters remain at 30 percent. A contractor working fewer than 10 hours on a project in a given month is exempt from the graduation percentage requirement, as are subcontractors whose work does not exceed one-half of one percent of the prime contract.¹³

Change Order Limits

Change orders cannot become a route around competitive bidding, so the code caps how much a single change order can add. For county projects, the tiers are:

Contracts up to $50,000: change order costs cannot exceed $5,000.
Contracts between $50,000 and $250,000: change order costs cannot exceed 10 percent of the original contract.
Contracts over $250,000: change order costs cannot exceed $25,000 plus 5 percent of the amount above $250,000, with an absolute cap of $210,000.¹⁴

All change orders must be authorized in writing. A verbal request to add work has no place in public contracting.

Small Business and DVBE Preferences

Certified small businesses receive a 5 percent preference in competitive bidding. In low-bid procurements, the preference is applied to the lowest responsible bid amount, capped at $50,000 per bid and $100,000 when combined with other statutory preferences. In best-value procurements scored on multiple factors, the preference equals 5 percent of the highest bidder’s total score. Non-small businesses can earn up to a 5 percent preference by committing to meaningful small business subcontractor participation.¹⁵

Each state department must hit at least 3 percent disabled veteran business enterprise participation across its contracting annually.¹⁶

Bid Protests

An unsuccessful bidder who believes the award was flawed can file a protest. The specifics vary by agency, but the code sets an alternative protest framework for state-level procurements under PCC Section 12126.

Under that framework, the Department of General Services reviews the protest within seven days to decide whether it is frivolous. If it is, the protest does not proceed unless the protesting bidder posts a bond equal to 10 percent of the estimated contract value. Protests that survive the initial screening must be decided within 45 days. Only actual participating bidders have standing, and the grounds are limited to violations of the solicitation procedures or arguments that the protester should have been selected.¹⁷

Filing a protest does not automatically halt the project. The code allows agencies to enter into contracts and begin work while a protest is pending.

Claims and Dispute Resolution

Disputes during construction, whether over payment, scope, delays, or changed conditions, follow the mandatory claims process in PCC Section 9204.

The contractor submits a written claim with supporting documentation. The public entity has 45 days to respond in writing, identifying which portions it accepts and which it disputes. Undisputed amounts must be paid within 60 days of the written response.¹⁸

If the contractor disagrees with the response, or the agency does not respond within 45 days, the contractor can demand a meet-and-confer conference. The agency must schedule it within 30 days. After the conference, the agency has 10 business days to issue an updated written position on any remaining disputed amounts.¹⁸

Whatever remains after the meet-and-confer goes to nonbinding mediation, with costs split equally. The parties have 10 business days to agree on a mediator; if they cannot, each side picks one and those two mediators select a neutral third. Only after mediation fails, or both sides agree in writing to skip it, can the dispute move to litigation or binding arbitration.¹⁸

Consequences of Noncompliance

The stakes are not abstract. A contract awarded in violation of competitive bidding requirements is void, not merely voidable, unless the violation is technical or nonsubstantive. A taxpayer or competing bidder can bring an action to invalidate an improperly awarded contract, leaving the agency to rebid mid-project and the contractor without an enforceable agreement for work already performed.

For contractors, the consequences reach past any single project. Failure to register with the Department of Industrial Relations means the contractor cannot legally bid on, be listed in a bid for, or perform any public works. Prevailing wage violations can result in back-pay awards, penalties, and debarment. Subcontractor listing violations can lead to disciplinary action and forfeiture of the contract itself.

1
California State Controller’s Office. Uniform Public Construction Cost Accounting Act FAQ
2
Justia. California Code PCC 20150 – Counties
3
California Legislative Information. California Code PCC 20483
4
California Legislative Information. California Code PCC 20101
5
California Legislative Information. California Public Contract Code – Subletting and Subcontracting Fair Practices Act
6
California Legislative Information. California Code PCC 4107 – Substitution of Subcontractors
7
California Legislative Information. California Code PCC 10222
8
California Legislative Information. California Public Contract Code – Design-Build for Transportation
9
California Legislative Information. California Code PCC 22164
10
California Legislative Information. California Code PCC 20386 – Job Order Contracting
11
California Legislative Information. California Labor Code 1771
12
California Department of Industrial Relations. Contractor Registration
13
California Legislative Information. California Code PCC 2601
14
California Legislative Information. California Code PCC 20142 – Counties
15
California Legislative Information. California Government Code 14838
16
California Department of General Services. Small Business and Disabled Veteran Business Enterprise Contracting – 1200
17
California Legislative Information. California Code PCC 12126
18
California Legislative Information. California Public Contract Code 9204