Bonding is where most small California contractors fall out of the running for public work. A payment bond of at least 100% of the contract price is mandatory on every California public works contract over $25,000, and no agency will let you start work without it. If your surety will not write that bond, the low bid does not matter.
Quick answer: California public works uses three bonds. Bid security, commonly 10% of the amount bid and required at 10% by statute on state contracts (Public Contract Code section 10167), proves you will sign if you win. A performance bond, almost always 100% of the contract, guarantees the work. A payment bond of not less than 100% of the total amount payable, required on any public works contract over $25,000 (Civil Code sections 9550 and 9554), guarantees your subs and suppliers get paid. Premiums run about 1% to 3% of contract value. If a surety declines you, the SBA guarantees 80% to 90% of its loss on contracts up to $9 million, and LA Metro and the City of Los Angeles each guarantee 40% of the bond amount up to $250,000 for certified small firms.
What bonds does California require on a public works contract?
Three, and they do different jobs. Contractors often treat them as one paperwork step, which is how people end up disqualified over a bid bond made payable to the wrong entity.
| Bond | When it is required | Standard amount | Authority | Who is protected |
|---|---|---|---|---|
| Bid security (bidder’s bond) | With the sealed bid | 10% of the amount bid | PCC 10167 (state, mandatory 10%); PCC 20129 sets acceptable forms for counties | The agency, if you win and then walk away |
| Performance bond | Before contract execution | 100% of the contract | PCC 10221 (state); agency-set for local | The agency, if you fail to complete |
| Payment bond | Before work commences | Not less than 100% of the total amount payable | Civil Code 9550, 9554 | Subcontractors, suppliers, and laborers |
Two details in that table are worth reading twice.
First, the 10% bid security figure is statutory only for state contracts. Public Contract Code section 10167 says plainly that “the required bidder’s security shall be in an amount equal to at least 10 percent of the amount bid,” and it accepts an electronic bidder’s bond submitted through an electronic registry service, a signed surety bond, cash, or a cashier’s check payable to the department director. County bidding under section 20129 lists the acceptable forms (cash, cashier’s check, certified check, or a bidder’s bond from an admitted surety insurer, all made payable to the county) without naming a percentage, so the county sets it. In practice nearly every California agency lands on 10%. Read the solicitation rather than assuming.
Second, section 20129 also requires the county to return an unsuccessful bidder’s security within a reasonable time, and “in no event” beyond 60 days from the award. If a county is sitting on your certified check past that window, that is a statutory deadline, not a courtesy.
When does the payment bond requirement kick in?
At $25,000. Civil Code section 9550 requires a direct contractor awarded a public works contract “involving an expenditure in excess of twenty-five thousand dollars ($25,000)” to give a payment bond before commencing work, approved by the awarding officer or entity. The agency has to say so in the call for bids. Section 9554 fixes the amount at not less than 100% of the total amount payable under the contract. Design professionals are not treated as direct contractors and do not owe a payment bond.
That $25,000 line matters most in the informal range. An agency operating under the California Uniform Public Construction Cost Accounting Act can award a public project of $220,000 or less through informal bidding, with no public advertisement. Informal bidding changes how the job is advertised and awarded. It does not touch the bond. A $140,000 informal CUPCCAA paving contract still carries a mandatory 100% payment bond, still carries DIR registration and prevailing wage obligations, and still carries whatever performance bond the agency wrote into its documents.
How much do surety bonds cost in California?
Budget 1% to 3% of contract value for the performance and payment bond package. Rates are tiered and step down as the contract grows, and they move with the strength of your financials, so a well capitalized contractor with an audited statement and a clean loss history sits near the bottom of that band while a newer firm sits above it.
| Contract value | Typical performance and payment premium at 1% to 3% | SBA guarantee fee if used (0.6% of contract price) |
|---|---|---|
| $150,000 | $1,500 to $4,500 | $900 |
| $500,000 | $5,000 to $15,000 | $3,000 |
| $2,000,000 | $20,000 to $60,000 | $12,000 |
Three cost notes contractors get wrong:
- Bid bonds are normally free. A surety that expects to write your final bonds issues the bid bond at no premium. The SBA charges no fee on bid bond guarantees either.
- The premium is a job cost, so price it into the bid. It is not overhead you absorb.
- Your CSLB license bond is a different thing entirely. The $25,000 contractor license bond under Business and Professions Code section 7071.6, raised from $15,000 effective January 1, 2023 and unchanged for 2026, is a licensing requirement. It does not give you any project bonding capacity. The qualifying individual bond under section 7071.7 is also $25,000 where it applies.
Why did the surety decline me, and how do I build capacity?
Sureties underwrite on capital, capacity, and character, and the number that decides most small contractor files is working capital, meaning current assets minus current liabilities.
The common industry conventions:
| Metric | Typical surety expectation |
|---|---|
| Single project limit | Roughly 10 times working capital (range of about 8 to 15 times) |
| Aggregate program limit | Roughly 15 to 20 times working capital |
| Net worth | At least 10% of total bonded backlog |
| Working capital | At least 5% to 10% of annual revenue |
Run those numbers before you chase a job. A contractor with $80,000 in working capital is realistically looking at a single project limit near $800,000 and an aggregate backlog limit near $1.2 million to $1.6 million. Bidding a $2 million contract with that balance sheet wastes the estimating hours no matter how sharp the price is.
The levers that actually move capacity are unglamorous: leave profit in the company instead of distributing it, convert short term debt to long term so it drops out of current liabilities, get a CPA reviewed or audited statement rather than a compilation, clear up aging receivables, and give the surety a work in progress schedule that shows accurate cost to complete. Personal indemnity from the owners is standard and is not a red flag.
What bonding assistance exists for small California contractors?
More than most contractors use. These programs exist precisely because the surety market underwrites on a balance sheet that a growing firm has not built yet.
| Program | What it does | Cap | Who qualifies |
|---|---|---|---|
| SBA Surety Bond Guarantee | Guarantees 80% to 90% of the surety’s loss on bid, performance, payment, and maintenance bonds | Contracts up to $9 million, or $14 million on federal contracts when a contracting officer certifies the need | SBA size standard small businesses. 90% guarantee on contracts of $100,000 or less and for veteran, service-disabled veteran, HUBZone, and socially or economically disadvantaged owners |
| LA Metro Contractor Development and Bonding Program | Bid, performance, and payment bond guarantees on Metro contracts | 40% of contract value or $250,000, whichever is less, per contract, with no cap on contract size | Metro-certified SBE, DBE, and DVBE firms |
| City of Los Angeles Contractor Development and Bonding Program | Bond guarantees to the surety on City contracts and subcontracts | 40% of the bond amount or $250,000, whichever is less | Small local contractors bidding City work |
| USDOT Bonding Education Program | Gets firms bond ready through the Small Business Transportation Resource Center, with the Surety and Fidelity Association of America | Training and technical assistance, no dollar guarantee | Small and disadvantaged transportation contractors. The Southwest Region center covers California |
The SBA program is the one to know cold. The contractor fee is 0.6% of the contract price on a final bond, which works out to $6 per $1,000, and the surety pays SBA 20% of the premium it charges. There is no application fee and no fee on bid bonds. A QuickApp path handles contracts up to $500,000 with approval in about a day. Caltrans has a memorandum of understanding with SBA, developed with the Governor’s Office of the Small Business Advocate, aimed specifically at getting more small firms bonded onto state highway and transit work.
The program is not a niche backwater. In fiscal 2025 SBA guaranteed bonds supporting $10.6 billion in total contract value, helped more than 2,200 small businesses, and backed $3.4 billion in contracts for those firms, up 19% over the prior record. If your surety says no on a $600,000 city job, the next call is to an SBA-authorized agent, not to the next surety.
If you hold a federal Disadvantaged Business Enterprise certification, the transit agencies running the largest Southern California programs are also the ones with the richest bonding support. See our DBE certification guide for how that certification interacts with Caltrans and LA Metro contracting.
What changed for California contractors in 2026?
One meaningful change, and it is about retention rather than bonds, though the two are linked.
Retention on public works has been capped at 5% since 2012 under Public Contract Code section 7201, and an agency can exceed that only by finding a project “substantially complex” at a noticed public hearing before bidding and explaining the basis in the bid documents. SB 61 brought private construction to parity effective January 1, 2026, capping retention on most private contracts at 5% through Civil Code section 8811, non-waivable, and flowing down so a general cannot withhold more from a sub than the owner withholds from the general. Residential-only projects of four stories or fewer are exempt.
Both the public and private caps carry the same bond-shaped exception. The 5% limit does not apply where the contractor gave written notice at or before the time bids were requested that bonds would be required and the subcontractor then could not or would not furnish a performance and payment bond. Being bondable is now directly worth 5% of every progress payment on jobs where the prime asked for bonds.
Subcontractors should also know Public Contract Code section 4108. A prime may require a performance and payment bond from a listed sub only if the written or published request for subbids “clearly specifies the amount and requirements of the bond or bonds,” and if the sub is to bear the cost, the subbid request has to say that as well. A prime that leaves it out is precluded from imposing bond requirements later. Where the prime does request a bond after bid without having shifted the cost, the statute puts the expense on the prime at the established charge or premium. A sub who then fails to furnish the bond can be rejected and substituted under section 4107.
How do I find California public works bids that match my bonding capacity?
Match the job to the balance sheet before you spend estimating hours on it. The bond and insurance requirements sit inside the solicitation documents, not in the one-line bid title on a portal, which is why so many contractors discover a $5 million performance bond requirement three days before the due date.
FindBids reads what your business actually does and matches it to live California state and local bids by meaning, then pulls the full bid documents for you automatically, including from gated portals that normally require a manual login. Legacy tools make you pick NAICS codes and keywords and still leave you downloading documents by hand. Having the full document set in front of you on day one is what lets you screen for contract size, bond requirements, and prevailing wage scope while there is still time to line up the surety.
Send FindBids a short description of your company and get back a free personalized match report of the live California bids that fit you right now, at a contract size your surety will actually write.
Frequently asked questions
Is a performance bond required on every California public works contract?
Not by a single statewide statute the way the payment bond is. The payment bond is mandatory above $25,000 under Civil Code section 9550. Performance bonds are required by the awarding agency, and Public Contract Code section 10221 requires state contracts to provide for separate performance and payment bonds from an admitted surety insurer. In practice, essentially every California public works solicitation over the payment bond threshold requires a performance bond at 100% of the contract, so plan on it.
What is an admitted surety insurer, and why does it matter?
An admitted surety insurer is one licensed by the California Department of Insurance to transact surety business in the state. California bond statutes, including Public Contract Code sections 10167, 20129, and 4108, specify bonds “executed by an admitted surety insurer.” A bond from a non-admitted carrier can get your bid rejected as non-responsive, so verify the carrier before bid day.
Do I need a bond for a CUPCCAA informal bid under $220,000?
Yes, if the contract exceeds $25,000. The Uniform Public Construction Cost Accounting Act changes bidding procedure only. Civil Code section 9550 still requires a payment bond of at least 100% of the contract amount above $25,000, and the agency’s informal bid package will normally require a performance bond as well. Informal bidding is not a bond exemption.
How long does it take to get bonded for the first time?
Plan on two to four weeks for a first submission to a standard surety, longer if your financial statements need work. An SBA-guaranteed bond through the QuickApp path handles contracts up to $500,000 with approval in roughly one day once your agent has your package assembled. Either way, start before you find the job, because bid security is due with the bid.
Does my CSLB contractor license bond count toward project bonding?
No. The $25,000 license bond under Business and Professions Code section 7071.6 protects consumers and the state, and it is a condition of holding the license. It creates no bonding capacity for a public works project. Bid, performance, and payment bonds are underwritten separately against your financial statements.
Frequently Asked Questions
What bonds are legally required on a California public works contract?
A payment bond of at least 100% of the contract amount is mandatory on every California public works contract over $25,000 under Civil Code sections 9550 and 9554, and it must be filed before work begins. Bid security and performance bonds are set by the awarding agency. State contracts require bid security of at least 10% of the amount bid under Public Contract Code section 10167 and separate performance and payment bonds under section 10221. Most local agencies follow the same 10% and 100% pattern.
How much does a performance and payment bond cost in California?
Expect a premium of roughly 1% to 3% of the contract value for the performance and payment bond package, with rates stepping down as contract size increases and as your financial statements improve. A $250,000 job typically runs $2,500 to $7,500. Bid bonds are usually issued at no premium by a surety that expects to write the final bonds. The $25,000 CSLB contractor license bond required under Business and Professions Code section 7071.6 is separate and typically costs a few hundred dollars a year.
Can a prime contractor make me buy a bond as a subcontractor?
Only if the prime said so up front. Public Contract Code section 4108 lets a prime require a performance and payment bond from a listed subcontractor only if the written or published request for subbids clearly specified the amount and requirements of the bond. If the prime also wants you to pay for it, the request for subbids has to say that too. A prime that omits the requirement from the subbid request is barred from imposing it later, and the cost otherwise falls on the prime.
What help exists if my surety will not bond me?
Three layers. The SBA Surety Bond Guarantee Program backs 80% to 90% of the surety's loss on contracts up to $9 million ($14 million on federal contracts with a contracting officer certification), and the contractor fee is 0.6% of the contract price with no fee on bid bonds. LA Metro and the City of Los Angeles each guarantee 40% of the bond amount up to $250,000 for certified small, disadvantaged, and disabled veteran firms. Bonding Education Programs through the Small Business Transportation Resource Center get you bond ready before you apply.
How can FindBids help me find work that fits my bonding capacity?
FindBids reads what your business actually does and matches it to live California state and local bids by meaning, then pulls the full solicitation documents for you automatically, including from gated portals that require a manual login. Because the bond and insurance requirements sit inside those documents, you can filter for jobs inside your single-project limit instead of finding out at bid time that the surety will not write it. Send FindBids a short description of your company and get back a free personalized match report of live California bids that fit you today.