California Contractor License Guide: CSLB Classes, Fees, $25,000 Bond, Exams and the $1,000 Rule

If you plan to bid on, sign or get paid for construction work in California, the Contractors State License Board (CSLB) almost certainly governs that work. This guide covers the mechanics that apply across nearly every trade: who needs a license, the classifications, what the license costs, the bonds and insurance you must carry, workers' compensation, contract rules and the penalties for working without a license. Trade-specific guides go deeper into individual classes.

Informational content only. This article is not legal or tax advice. Licensing rules, fees and processing times change. Confirm current figures on CSLB's website at cslb.ca.gov before you spend money or sign a contract. If your situation involves several trades, a partnership, employees or a dispute, consult a qualified attorney or CPA.

Who Needs a California Contractor License

You need a CSLB license for any project valued at $1,000 or more in combined labor, materials and all other items. You also need one for any work that requires a building permit, regardless of price. This comes from Business and Professions Code (BPC) 7048, and it is the rule people mean by the “$1,000 rule.” The threshold is $1,000, not $500.

Three things defeat the small-job exemption:

• You advertise, or put out a sign, card or device, suggesting you are a contractor.
• You employ anyone to do or help with the work.
• You split one project into smaller contracts to stay under $1,000.

The definition of “contractor” reaches further than many people expect. Under BPC 7026.1, it covers a consultant who oversees a bid or schedules work on a home improvement project, and anyone who services heating, air-conditioning or refrigeration equipment fixed to a structure. Advertising construction work without a license in that class is a misdemeanor with a fine of $700 to $1,000 (BPC 7027.1).

California Contractor License Classifications

CSLB issues licenses by classification. Each class covers a defined scope of work, and you must qualify in every class you intend to perform. The main classes are:

Class	Scope
A General Engineering	Fixed works that require specialized engineering knowledge
B General Building	A structure that requires at least two unrelated trades
B-2 Residential Remodeling	Existing wood-frame homes requiring at least three unrelated trades (BPC 7057.5)
C-10 Electrical	Electrical work
C-20 Warm-Air Heating, Ventilating and Air-Conditioning	HVAC work
C-27 Landscaping	Landscaping work
C-33 Painting and Decorating	Painting and decorating work
C-36 Plumbing	Plumbing work
C-39 Roofing	Roofing work
C-46 Solar	Solar work
C-53 Swimming Pool	Swimming pool work
C-61 Limited Specialty	Limited specialty work, with D subclasses such as D-49 Tree Service and D-38 Sand and Water Blasting

Tree workers need to pay close attention here. CSLB's regulations also list a C-49 Tree and Palm class, so check with CSLB which class it issues before you apply.

If you later take on work outside your license, you can add a classification. An additional classification costs $230, or $150 if you apply for it with your original license.

How to Get a Contractor License in California

The core qualifications are the same for every class. Work through them in this order:

1. Meet the basic requirements. You must be at least 18 and have a Social Security number or an ITIN.
2. Document your experience. You need four years of journey-level experience in the classification within the last ten years. CSLB may credit some training on a case-by-case basis, but at least one year of journey-level work is always required.
3. Pass the exams. Most applicants take two computer exams: one on law and business and one on the trade. C-61 applicants take only the law and business exam (BPC 7065.01). Every applicant also takes an open-book asbestos exam. You have 18 months from acceptance to pass, and passed exams count for five years.
4. Name a qualifier. A company qualifies through a responsible managing employee, officer, manager or member. An employee qualifier must be permanently employed and actively engaged in the work, meaning 32 hours a week or 80 percent of the business hours, whichever is less (BPC 7068).
5. Submit fingerprints. CSLB asks for fingerprints after it accepts your application. Expect a Department of Justice fee of $32, an FBI fee of $17 and the rolling fee the Live Scan site charges.

Check CSLB's posted processing times before you plan a start date, because they change.

CSLB License Fees

These figures come from CSLB's fee schedule. Confirm them on the agency site before you pay.

Fee	Amount	Notes
Original application	$450	Non-refundable, covers one classification
Initial license, sole owner	$200	Issued after the application is approved
Initial license, corporation, LLC, partnership or joint venture	$350	Issued after the application is approved
Application plus initial license	$650 sole owner; $800 other entities	Before bonds and fingerprints
Two-year active renewal	$450 sole owner; $700 other entities	C-10 is $470 sole owner and $720 other entities
Delinquent renewal	$675 or $1,050	Amount depends on entity type under CSLB's schedule
Exam retake	$100 each	Charged for each exam you retake
Additional classification	$230	$150 when applied for with the original license
Home improvement salesperson registration	$200	For salespeople who sell home improvement work

Your total cash outlay also includes the bond premium, insurance and fingerprint fees. The fees above do not include the entity filing costs you will face as a business, such as the $70 Articles of Organization (Form LLC-1) for an LLC or the $100 articles fee for a stock corporation, both filed with the California Secretary of State.

California Contractor License Bond and Insurance

Every license requires a $25,000 bond. An LLC license also needs an employee wage bond and liability insurance. The main requirements are:

• Contractor bond: $25,000 for every license (BPC 7071.6). You pay a surety a premium to obtain the bond, and the premium is usually a small percentage of the $25,000 face amount. Get a quote before you budget for it.
• LLC wage bond: An LLC license also needs a $100,000 bond that protects employees owed wages (BPC 7071.6.5).
• Qualifier bond: If a qualifier owns less than 10 percent of the business, that qualifier needs a separate $25,000 qualifier bond.
• LLC liability insurance: At least $1,000,000 in aggregate coverage for up to five listed personnel. The required amount rises by $100,000 for each added person, up to a $5,000,000 cap (BPC 7071.19).

Workers' Compensation Rules

You must file proof of workers' compensation coverage with CSLB. If you have no employees, you may file an exemption instead, and that option is available through December 31, 2027.

Some classes never get the exemption. Holders of C-8, C-20, C-22, C-39 and D-49 must carry coverage even when they work alone (BPC 7125(b)). Outside those classes, the sole-owner exemption is not gone for every class, but the rules shift on January 1, 2028. From that date, the exemption survives only for joint ventures with no employees (SB 1455). If you plan to operate beyond 2027, confirm your current filing obligation with CSLB.

Home Improvement Contract Rules

Home improvement contracts carry strict requirements under BPC 7159.5:

• The contract must be in writing, and the price must be stated in dollars and cents.
• The down payment may not exceed the lesser of $1,000 or 10 percent of the contract price.
• Any payment schedule must tie each payment to work actually completed.
• You may not collect payments ahead of the work you have performed.
• The owner may demand lien releases with each payment.

Build these terms into every home improvement contract from the start. Renegotiating them after a dispute begins is much harder.

Penalties for Unlicensed Contracting

Working without a required license carries serious consequences:

• Criminal penalties: On a first conviction for unlicensed contracting, the penalty is a fine of up to $5,000, up to six months in county jail, or both (BPC 7028).
• Loss of payment rights: An unlicensed contractor cannot sue to collect payment for the work. The owner can also recover all compensation already paid (BPC 7031).
• Advertising violations: Advertising construction work without the required license is a misdemeanor with a fine of $700 to $1,000 (BPC 7027.1).

The third penalty can apply even when you have not yet taken a job. Removing a sign or ad that suggests you are a contractor can prevent a violation.

Next Steps

1. Confirm whether your project falls under the $1,000 rule or the building permit rule.
2. Choose the classification that matches your work, and check with CSLB if your trade is unclear.
3. Document four years of journey-level experience within the last ten years.
4. Set up your business entity with the Secretary of State, and register with the California Department of Tax and Fee Administration if you sell taxable goods. Check with your city about its local business tax or registration certificate, since the requirements vary by city.
5. Get bond and insurance quotes early, since they must be in place before CSLB issues the license.

Because contractor licensing involves licensing, bonding, tax and employment issues at once, a consultation with a qualified attorney or CPA is worth the cost before you commit to a structure or sign contracts. The California Small Business Development Center network also offers free or low-cost planning help.

This guide is informational content and does not constitute legal or tax advice. Verify all fees, deadlines and requirements with the relevant agency before acting.