Fast, Free and No Risk
CSLB Form 13B-1 Explained (California Contractor Bond Filing Guide)
Updated for 2026 California contractor licensing requirements
Quick Answer: CSLB Form 13B-1 is the official bond filing form used to verify that a California contractor license bond has been issued and electronically filed with the CSLB. When you purchase a California contractors license bond, the bond you receive is on form 13b-1.
Understanding exactly what Form 13B-1 is—and how it works—helps you avoid delays, rejections, or license suspension.
California Contractor Bond Requirements, Cost, and CSLB Filing Guide (2026)
CSLB Form 13B-1 – Key Facts
- Form Name: CSLB Form 13B-1
- Purpose: Confirms contractor license bond compliance and filing
- Required For: All licensed California contractors by California Contractors State License Board (CSLB)
- Filed By: Surety company (not the contractor)
- Submission Method: Electronic filing with CSLB
- Bond Amount: $25,000 contractor license bond
- Legal Authority: California Business & Professions Code §7071.6
- When Required: License application, activation, renewal, or bond replacement
- Processing Time: Typically same-day when filed correctly
- Main Risk: Missing or incorrect filing can delay, suspend, or prevent license issuance
What Is CSLB Form 13B-1?
CSLB Form 13B-1 is the official bond filing document used to confirm that your contractor license bond is active and compliant with California law.
It is not something most contractors fill out themselves. Instead, your surety company generates and files the form after your bond is issued.
Once filed, the CSLB uses this form to:
- Confirm bond coverage is in place
- Link the bond to your contractor license number
- Activate or maintain your license status
When Is Form 13B-1 Required?
You will need Form 13B-1 filed in any of the following situations:
1. New License Application
Before your contractor license can be issued, the CSLB must receive a valid bond filing.
2. License Activation
If your license is inactive or pending, the bond filing is required to activate it.
3. Bond Replacement or Change
If you switch surety companies or update your bond, a new Form 13B-1 must be filed.
4. License Renewal
Your bond must remain active at all times. If it lapses, a new filing is required.
▶ Video Transcript
[00:00] If you’re applying for a California contractor license, one form can determine whether your license gets approved or delayed—CSLB Form 13B-1.
[00:08] Form 13B-1 is the official proof that your contractor license bond is on file with the California Contractors State License Board.
[00:16] When you purchase a contractor license bond, your surety generates Form 13B-1 and files it electronically with the CSLB.
[00:24] This form is required for new licenses, renewals, bond changes, and license activation.
[00:32] If Form 13B-1 is missing or filed incorrectly, your license can be delayed, become inactive, or even be suspended.
[00:42] The process is simple: apply for the bond, get approved, pay the premium, and your surety files the form—often the same day.
[00:52] Bottom line: a properly filed Form 13B-1 is the official proof your bond is on file with the CSLB.
Are Contractor License Bonds Transferable Between Entities?
No.
If a contractor transitions from a Sole Proprietorship to an LLC, for example, a new contractors bond must be purchased and Form 13B-1 must be re-filed for the new entity. Many contractors assume the bond “follows” the person, which leads to immediate suspension.
Learn more about LLC Employee/Worker bonds:
Who Files CSLB Form 13B-1?
The surety company files Form 13B-1—not the contractor.
Your responsibility is to:
- Apply for the bond
- Pay the premium
- Provide accurate business and license information
Once completed, the surety handles:
- Form generation
- Electronic filing with CSLB
- Confirmation of bond compliance
How the Bond Filing Process Works
Here’s the exact process step-by-step:
- Apply for Contractor License Bond
- Get Approved (based on credit and underwriting)
- Pay the Bond Premium
- Surety Issues Bond
- CSLB Form 13B-1 Generated
- Surety Files Electronically with CSLB
- CSLB Updates License Status
Most filings are completed within minutes to same-day.
Important Note: The CSLB requires the bond to be received within 90 days of the effective date written on Form 13B-1. If a surety files a bond late, the CSLB will reject it, and you’ll have to get a “backdated” bond or a new filing, which causes massive delays.
Common Mistakes That Delay Filing
These are the most frequent issues that cause CSLB delays:
- Incorrect license number on the bond
- Business name mismatch
- Bond not filed electronically
- Using the wrong bond form
- Delay between bond purchase and filing
- Bond cancellation or lapse
Any of these can result in:
- License delay
- Inactive status
- Suspension
Important Note on Bond Filing
After purchasing a bond, contractors need to verify the filing by using the CSLB “Check a License” portal, (this link for new applicants.)
The CSLB does not accept bonds in advance of the effective date, so for example, if a bond was purchased today, it will usually be filed today and will generally show up on a contractors CSLB profile within a few days depending on CSLB processing times, click here for link. If the bond does not show up within a few days, notify your broker who can send another copy.
Example Scenario of a Bond with a Future Effective Date
If a bond is purchased with an effective date 10 days from now, for example, the surety will send the bond in ten days as the CSLB does not accept bonds in advance of the effective date. It will then go into their processing que subject to CSLB processing times and will generally post within a few days later. To prevent bond lapses or license days, plan bond effective dates accordingly.
What Happens If Form 13B-1 Is Missing?
If the CSLB does not receive a valid bond filing:
- Your license will not be issued
- Your license may become inactive
- Your license can be suspended
There is no workaround—the bond must be properly filed.
How to Make Sure Your Bond Is Filed Correctly
To avoid problems:
- Use an experienced surety provider
- Confirm electronic filing (not paper)
- Verify your license number and business name
- Ask for confirmation once filed
- Monitor your CSLB license status online
How Long Does CSLB Form 13B-1 Take to Process?
- Electronic filing: Usually same-day
- CSLB processing: Often within hours
- Full license update: Typically immediate to 24 hours
Delays usually come from incorrect information, not the CSLB itself.
Final Takeaway
CSLB Form 13B-1 is the official verification that your contractor license bond is active and compliant. Without it, your license cannot be issued or maintained.
The process is simple when handled correctly—but mistakes can cause costly delays. The key is working with a surety provider that files quickly and accurately.
Frequently Asked Questions
What is CSLB Form 13B-1 used for?
It is used to verify that a contractor license bond has been properly issued and filed with the CSLB.
Do I need to submit Form 13B-1 myself?
No. The surety company files the form electronically on your behalf.
How long does it take for the CSLB to process the form?
Most filings are processed the same day when submitted correctly. Check CSLB processing times and allow 3-5 business days.
What bond does Form 13B-1 apply to?
It applies to the California contractor license bond required under Business & Professions Code §7071.6.
Can my license be delayed if the form is not filed?
Yes. Your license cannot be issued or activated without a valid bond filing.
What if I change bond companies?
A new Form 13B-1 must be filed by the new surety company.
Related California Contractor Bond Guides
-
-
- California Contractor Bond Requirements, Cost, and CSLB Filing Guide (2026)
- How Much Does a California Contractor License Bond Cost?
- CSLB Bond Claim: How to Handle, Defend & Reinstate Your License
- CSLB Bond Lapses: How to Fix an Automatic License Suspension
- How Does a California Contractor License Bond Work?
- Renewing Your California Contractor License Bond: Multi-Year vs. Annual Terms
- California Disciplinary Bonds: How to Reinstate a Revoked License
-
Reviewed by: Jeremy Schaedler
Principal – Surety First Insurance Services
As principal at Surety First, Jeremy Schaedler has specialized in contractor license bonds and construction insurance since 2006. CA License: 0f06277
This information is for general informational purposes only and does not constitute legal advice. Licensing and insurance requirements may change. Contractors should verify current requirements directly with their state regulatory agency or consult qualified legal counsel.
Why Contractors Choose Surety First
- Specializing in contractor bonds and insurance since 2006 (20,000+ served)
- A-rated surety markets
- Fast approvals, often within minutes
- Electronic CSLB filing
- Serving contractors across CA, OR, WA, NV, AZ
Phone: 1-800-682-1552
Website: suretyfirst.com
Official Regulatory & Legal References:
-
California Business & Professions Code § 7071.6: The primary statute requiring the $25,000 contractor license bond. Source: California Legislative Information – BPC § 7071.6
-
CSLB – About Contractor Bonds: The Board’s official explanation of bond requirements and the electronic filing mandate. Source: Contractors State License Board – Bond Information
-
CSLB – Check a License Portal: The official government tool where contractors can verify if their Form 13B-1 has been successfully posted. Source: CSLB – Instant License Check
-
California Code of Regulations § 822 (Bond Forms): The regulation that authorizes the CSLB to prescribe the specific format of bond forms like the 13B-1. Source: California Office of Administrative Law – CCR Title 16, § 822
-
CSLB – Information on Bond Companies: CSLB guidance on verifying that a surety is admitted by the California Department of Insurance. Source: CSLB – Surety Company Verification
