Insurance and Liens

Introduction

This section is small on paper and large in consequence. Only about one question in eight comes from Insurance and Liens, yet it is one of the highest-error areas on the whole exam — because almost every point turns on a precise rule, a precise deadline, or a distinction that sounds like a technicality until it costs someone their license or their payment.

The section splits cleanly into two worlds. The first is insurance: workers' compensation (which California treats as a licensing condition, not just a business decision) and the other policies a contractor carries — general liability, builder's risk, commercial property and auto — plus the often-misunderstood difference between a surety bond and an insurance policy. The second is liens and remedies: the mechanics lien and its cousins — the preliminary notice, the stop payment notice, and the payment bond — each governed by a strict clock under California's Civil Code §8000 framework. Get the clocks wrong and a perfectly valid debt becomes uncollectible.

Two currency notes before we begin, because stale study material gets both wrong. First, California's workers'-compensation mandate for contractors is in the middle of a phase-in: the old "no employees, no coverage needed" exemption is being eliminated classification by classification under SB 216 (2022), and SB 1455 (Stats. 2024, Ch. 485) pushed the all-classifications deadline back to January 1, 2028. Any answer that says every no-employee contractor must already carry workers' comp "as of 2026" is wrong for most classifications. Second, the mechanics-lien rules cited here are the modern §8000 et seq. scheme (operative July 1, 2012), not the old §3082 numbering that older books still use. This chapter reflects current law.

---

Learning objectives

After working through this chapter you should be able to:

• State that every California employer must secure workers' compensation for its employees, that one employee triggers the duty, and that the system is no-fault and generally the employee's exclusive remedy (Lab. Code §3700).
• Explain that a contractor must keep a current workers'-comp certificate (or valid exemption) on file with CSLB, that a lapse causes automatic license suspension, and exactly which classifications have already lost the no-employee exemption and when it ends for all (B&P §7125; SB 216/SB 1455).
• Describe the consequences of being an uninsured employer — civil suit, loss of the exclusive-remedy shield, penalties, and the Uninsured Employers Benefit Trust Fund (Lab. Code §§3706, 3715).
• Identify who counts as an "employee" for workers' comp, including the presumption that unlicensed workers hired to do licensed work are employees (Lab. Code §§3351, 3352).
• Match the right business-insurance policy to the right risk — general liability, builder's risk, commercial property, commercial auto — and know that none of them covers employee injuries (that is workers' comp).
• Explain the structural difference between a surety bond (three parties, contractor repays) and insurance (two parties, risk transfer).
• State the LLC liability-insurance requirement — $1 million scaling up to $5 million with the number of members (B&P §7071.19).
• Explain the mechanics lien, who may claim it, and that it attaches only to private property (Civ. Code §§8400, 8402).
• Apply the lien clocks: the 20-day preliminary notice (required by §8200; the 20-day deadline is set by §8204), the 90/60/30-day recording deadlines (§§8412, 8414), and the separate 90-day deadline to foreclose (§8460).
• Distinguish the stop payment notice (§8500) and the payment bond claim (§8600) from the lien, and state the prompt-payment and retention-release rules (§§8800, 8802, 8814), including that only disputed amounts may be withheld.

---

Part A — Workers' compensation

Every employer must carry it, and one employee is enough

California law is blunt: every employer must secure the payment of workers' compensation for its employees, either by buying a policy from an insurer (including the State Compensation Insurance Fund) or by qualifying with the state to self-insure (Lab. Code §3700). There is no headcount threshold to cross first — a single employee triggers the duty. The idea that a business needs some minimum number of workers before coverage kicks in is a common and costly misconception.

Two features of the system define it. It is no-fault: an injured worker collects medical care, disability payments, and death benefits without having to prove the employer did anything wrong. And in exchange, workers' comp is generally the employee's exclusive remedy — the worker takes the guaranteed benefits and gives up the right to sue the employer in civil court for the injury. That trade — guaranteed no-fault benefits for the employee, immunity from lawsuits for the employer — is the entire logic of the system, and the exam tests it directly.

California example. A small drywall contractor in Modesto hires his first helper — one part-time employee. From that first hire, the contractor must have a workers' comp policy in force. If the helper hurts his back on the job, he files a comp claim and is paid regardless of whose fault the injury was; he does not have to prove the contractor was negligent, and ordinarily he cannot sue the contractor in court instead.

The workers'-comp certificate as a licensing condition — and the phase-out you must know

Here California goes a step further than most states: workers' comp is not just an employment obligation, it is a condition of holding a contractor's license. A licensee must keep a current Certificate of Workers' Compensation Insurance — or a valid certificate of exemption — on file with CSLB (B&P §7125; §7125.2). Let the coverage lapse and the certificate expire, and the license is automatically suspended. This is not a "you'll get a warning" or "you'll pay a small fine" situation; the suspension is automatic, and an unlicensed contractor cannot legally contract or collect for the work.

Now the part that stale materials get wrong. Historically, a contractor with no employees could file an exemption instead of a policy — the "I work alone, so there's no one to insure" rule. California is phasing that exemption out under SB 216 (2022). The phase-out is staggered by classification, and — critically — SB 1455 (Stats. 2024, Ch. 485) postponed the all-classifications deadline from January 1, 2026 to January 1, 2028. As of 2026, the no-employee exemption is already gone for the higher-risk trades — C-8 (concrete), C-20 (HVAC), C-22 (asbestos abatement), C-39 (roofing), and D-49/C-61 (tree service) — so contractors in those classifications must carry a policy even if they truly have no employees. Every other classification keeps the exemption until January 1, 2028, when it ends for everyone.

The exam trap is a blanket statement: "As of 2026, any contractor with no employees must carry workers' comp." That is wrong for most classifications right now. The correct picture is the schedule: a named set of trades already covered, the rest covered on 1/1/2028.

California example. Two sole proprietors, each working alone with no employees. One holds a C-39 roofing license; the other holds a C-10 electrical license. In 2026 the roofer's no-employee exemption is already gone — a roofing contractor must carry workers' comp regardless — so he files a policy or his license is suspended. The electrician may still file the no-employee exemption for now, but on January 1, 2028 that door closes for his classification too.

What happens if you go uninsured

Going without required coverage is far worse than paying a premium late. An uninsured employer faces a stacked set of consequences (Lab. Code §§3706, 3715):

• The injured worker can sue the employer in civil court for the injury — and in that suit the employer loses key defenses it would normally have, so the worker's path to a judgment is much easier.
• The worker can simultaneously claim benefits from the state's Uninsured Employers Benefit Trust Fund (UEBTF), which pays the worker and then pursues the employer for reimbursement.
• The state can issue stop-work orders and impose substantial penalties.

The through-line is that being uninsured strips away the exclusive-remedy shield. The whole benefit an employer gets from the workers'-comp bargain — immunity from being sued — evaporates the moment the required coverage is missing. So the misconception that "an uninsured employer still can't be sued" is exactly backward, and the notion that "the only downside is buying coverage late" badly understates the exposure.

California example. A landscaping contractor lets his policy lapse to save money. A crew member is injured. The worker sues the contractor directly — and because the contractor was uninsured, the contractor cannot raise the usual workers'-comp defenses. Meanwhile the UEBTF pays the worker's benefits and comes after the contractor to recover every dollar, on top of state penalties and a possible stop-work order.

Who counts as an "employee"

Because the duty attaches to employees, coverage turns on who qualifies. California law defines "employee" broadly and resolves doubt in favor of coverage (Lab. Code §§3351, 3352). Most workers are included. A trap the exam likes: an unlicensed worker hired to perform work that requires a license is generally presumed to be an employee — so a contractor who hands a licensed-scope task to an unlicensed "independent contractor" has likely just created an employee (and a coverage obligation), not avoided one.

The statute carves out narrow exclusions — certain corporate officers and directors who own the business, some working family members, and true independent contractors — but these are limited and conditional. Two misconceptions to bury: calling someone an "independent contractor" does not by itself remove them from workers' comp — the ABC test (Lab. Code §2775, from Section 3) still decides status, and most workers default to employee; and not all corporate officers are automatically excluded — the exclusion is specific and often requires an ownership stake and an affirmative election to opt out.

California example. A framing contractor pays a day-laborer crew in cash and calls them "independent contractors," carrying no comp coverage. Because the framing work requires a license and the laborers are unlicensed, the law presumes they are employees. When one is hurt, the contractor is treated as an uninsured employer — exposed to the civil suit, penalties, and UEBTF recovery described above.

---

Part B — Business insurance

Matching the policy to the risk

Beyond workers' comp, a contractor carries a portfolio of insurance, and the exam's business-insurance questions are almost always "match the right policy to the right loss." Learn what each one does, and — just as important — what it does not cover. There is no single California code section here; these are insurance-coverage concepts (with one licensing exception, the LLC requirement below).

• Commercial General Liability (CGL): covers third-party bodily injury and property damage arising from the contractor's operations — a passerby hurt on the site, a client's property damaged by the work. It responds to claims by outsiders.
• Builder's risk (course-of-construction): covers the project itself — the structure under construction — against loss (fire, wind, theft of installed materials) while the work is in progress.
• Commercial property: covers the contractor's own buildings, tools, and equipment.
• Commercial auto: covers the contractor's vehicles.

The single most important negative rule: general liability does not cover injuries to the contractor's own employees — that is what workers' comp is for. Confusing those two is the classic error. A second common mix-up is treating builder's risk and commercial property as the same thing; builder's risk covers the project being built, while commercial property covers the contractor's own existing assets. And none of these policies substitutes for workers' comp.

California example. A general contractor building a custom home suffers a fire that destroys the half-framed structure; builder's risk responds to the loss of the project. Separately, a delivery driver is injured when the contractor's truck backs into him on the sidewalk — a general liability (and commercial auto) matter, because he is a third party. If instead the contractor's own carpenter had been hurt framing that house, neither policy applies — that claim goes to workers' comp.

Surety bonds versus insurance — a structural difference

Candidates constantly treat a bond as a kind of insurance that protects the contractor. It is not. The two are built differently.

Insurance is a two-party arrangement. The insurer accepts and prices a risk from the insured, expects to pay some losses, and pools premiums to cover them. When the insurer pays a covered claim, it does not turn around and bill the insured for the payout. Risk has genuinely been transferred to the insurer.

A surety bond is a three-party arrangement — the principal (the contractor), the obligee/beneficiary (the party protected by the bond, such as a project owner or, for the license bond, the public), and the surety (who issues the bond). The surety guarantees the contractor's performance or obligations to the beneficiary. Here is the pivotal point: if the surety pays a claim, the contractor must reimburse the surety in full. A bond is essentially a credit guarantee — the surety is vouching for the contractor, not absorbing the loss. The contractor stays on the hook.

So two misconceptions to reject: that a bond "protects the contractor like insurance" (it protects the beneficiary; the contractor repays), and that a bond involves only two parties (it involves three). The $25,000 contractor's license bond (B&P §7071.6) is the everyday example — it protects the public, not the contractor, and the surety who pays a valid claim will seek repayment from the licensee.

California example. A homeowner wins a CSLB claim against a contractor's $25,000 license bond, and the surety pays her. The contractor does not walk away clean: the surety demands the full amount back from the contractor. Contrast that with the contractor's general liability policy, where a covered payout to an injured third party is not charged back to the contractor. Same word — "covered" — completely different economics.

The LLC liability-insurance requirement

One business-insurance rule is a hard licensing condition, and it applies only to contractors organized as limited liability companies. An LLC licensee must carry liability insurance starting at $1,000,000, and that required amount scales up with the number of LLC members, to a maximum of $5,000,000 (B&P §7071.19). This coverage exists on top of the LLC's separate $100,000 employee/worker bond — the two are different requirements, and the insurance does not replace the bond. The policy exists because an LLC gives its members a limited-liability shield, and the extra insurance protects the public who deal with the LLC.

Two misconceptions to avoid: that the requirement is a flat $1,000,000 regardless of size (it scales up to $5,000,000 with member count), and that the liability insurance replaces the worker bond (both are required).

California example. A contracting business licensed as an LLC adds members as it grows. At formation it carries the $1,000,000 minimum liability policy; as membership increases, the required limit rises toward the $5,000,000 cap — and throughout, the LLC must also maintain its $100,000 worker bond. Dropping either one puts the license out of compliance.

---

Part C — Liens and other remedies

This is the deadline-arithmetic half of the section, governed by California's Civil Code §8000 et seq. (the modern works-of-improvement law, operative since July 1, 2012). The remedies form a toolkit — mechanics lien, stop payment notice, payment bond — and almost all of them share one gatekeeper: the preliminary notice. Learn the tools, then learn the clocks.

The mechanics lien — the core private-work remedy

A mechanics lien is a security interest recorded against privately owned real property to secure payment for the labor, services, equipment, or materials that improved that property (Civ. Code §8400 et seq.). It is not just for general contractors: direct (prime) contractors, subcontractors, material suppliers, and laborers who contributed to the work of improvement may all claim one, provided they follow the required steps and deadlines. If the claimant remains unpaid and enforces the lien, the remedy is powerful — it can ultimately force a sale of the property to satisfy the debt.

Two misconceptions the exam targets: that only the general contractor can lien (subs, suppliers, and laborers can too), and that a lien can attach to public property (it cannot — you cannot lien a school or a highway; public-works claimants use a payment bond or public stop notice instead, which is Section 6 material). The mechanics lien is a private-property remedy, and it is strictly procedural: the substance of the debt does not save a claimant who misses a step.

California example. A tile supplier delivers $12,000 of material to a private home remodel and is never paid by the subcontractor who ordered it. Even though the supplier never signed a contract with the homeowner, it contributed to the improvement of that private property and — if it served its preliminary notice and meets the recording deadline — can record a mechanics lien against the home.

The preliminary (20-day) notice — the gateway to every remedy

Before most claimants have any lien, stop-notice, or bond right, they must serve a preliminary notice — the "20-day notice" (required by Civ. Code §8200; the 20-day deadline itself is set by §8204). It goes to the owner, the direct contractor, and the construction lender (if any), and it must be served within 20 days after the claimant first furnishes labor or materials to the job. This is a condition precedent, not optional paperwork: a subcontractor or supplier who never serves it generally loses its mechanics-lien, stop-payment-notice, and bond-claim rights entirely. Serving it late does not cure the miss completely either — it limits recovery to amounts attributable to the 20 days before the notice was served, and afterward, cutting off everything earlier.

This single requirement is the most common way subs and suppliers destroy their own rights, which is why it is high-value on the exam. The person who most often doesn't need to serve it is the direct contractor dealing straight with the owner (the owner already knows about them); nearly everyone below that level must serve it to preserve any remedy.

California example. An electrician subcontractor starts wiring a private office build on March 1 but never sends a preliminary notice. When the general contractor fails to pay him in June, he discovers he has no lien rights at all — the missing 20-day notice cut them off before the job even progressed. His neighbor on the same site, a plumbing sub who served the notice on day 5, kept full lien rights for everything he furnished.

Deadlines to record a mechanics lien — 90 / 60 / 30

Once a claimant has preserved its rights with the preliminary notice, it must record the lien within a hard window, and the window depends on who is claiming and whether a notice of completion or cessation has been recorded (Civ. Code §§8412, 8414):

• Direct (prime) contractor: 90 days after completion of the work of improvement — shortened to 60 days if the owner records a notice of completion or cessation.
• Subcontractor or supplier: 90 days after completion — shortened to 30 days if a notice of completion or cessation is recorded.

The recording clock runs from completion (or the recorded notice), not from the day the claimant was last paid — a frequent wrong answer. And the trigger that shortens everyone's window is the recorded notice of completion: it compresses the prime's window to 60 days and the subs'/suppliers' to 30, which is precisely why owners record one. Miss the recording deadline and the lien is void even though the debt is real.

California example. A framing subcontractor finishes a private home and the debt goes unpaid. If nothing is recorded, he has 90 days from completion to record his lien. But the owner records a notice of completion three days after the job ends — now the sub has only 30 days from that recording to get his lien on file. A sub who assumes he still has the full 90 days will blow the deadline and lose the lien entirely.

The separate deadline to foreclose — another 90 days

Recording the lien is only step one. To actually enforce it, the claimant must file a lawsuit to foreclose the lien within 90 days after the lien is recorded (Civ. Code §8460). Miss that, and the lien expires and becomes unenforceable — the cloud on title effectively self-clears.

The exam deliberately tests whether you keep the two clocks straight:

• Clock 1 — record the lien: measured from completion (or a recorded notice of completion): 90/60/30 days (§§8412, 8414).
• Clock 2 — foreclose the lien: 90 days measured from the date the lien was recorded (§8460).

They are both "90-day-anchored" in the common case, which is exactly the confusion the test exploits — but they measure from different events, and missing either one voids the remedy. Recording a lien and then sitting on it does not preserve it indefinitely.

California example. A supplier records a valid mechanics lien on day 80 after completion — inside the recording window. Then, believing the recorded lien protects him, he waits eight months trying to negotiate. By the time he sues, the 90-day foreclosure deadline has long passed and the lien is dead. He met the first clock and missed the second, and the result is the same as never having filed.

The stop payment notice — reaching the money, not the property

A stop payment notice is a different remedy aimed at a different target (Civ. Code §8500 et seq.). Instead of encumbering the property, an unpaid claimant notifies the owner or the construction lender to withhold (freeze) undisbursed construction funds up to the amount owed. On a lender-financed job, a claimant who serves a bonded stop payment notice can compel the lender to hold back money from the loan for the claimant's benefit. It can be used instead of, or in addition to, a mechanics lien.

The distinction the exam wants: a mechanics lien attaches to the real property; a stop payment notice reaches the pool of undisbursed construction funds. And like the lien, the stop payment notice generally depends on the preliminary notice having been served and has its own deadlines — it is not a way around the §8200 gateway.

California example. A subcontractor on a lender-financed private project is unpaid but knows the construction loan still has undisbursed funds. Rather than lien the property, he serves a bonded stop payment notice on the lender, forcing it to freeze enough of the remaining loan proceeds to cover his claim — capturing the money before it is paid out to the general contractor.

Payment bond claims on private work

Some private projects carry a payment bond obtained by the owner or prime contractor that guarantees payment to subs and suppliers (Civ. Code §8600 et seq.). If a bonded project goes unpaid, a claimant can make a claim against the payment bond — again, instead of or in addition to recording a lien. The advantage is that the claimant pursues a solvent surety rather than fighting over the property, which is especially useful where a lien would be hard to enforce (for example, where the owner has already paid the prime). As with the other remedies, the preliminary notice is generally a prerequisite.

Two things not to confuse: a payment bond claim is not the same remedy as a mechanics lien (one pursues a surety, the other encumbers property), and the bond does not eliminate the preliminary-notice requirement. This private-work payment bond is also the conceptual bridge to Section 6, where on public works — because you cannot lien public property — the payment bond claim becomes the primary remedy.

California example. A supplier on a bonded private commercial project isn't paid. Rather than record a lien and wait to foreclose, it files a claim against the project's payment bond and collects from the surety, which had guaranteed payment to subs and suppliers. Because the supplier served its preliminary notice, the bond claim is available.

Prompt payment and retention release

California's prompt-payment statutes require owners and prime contractors to pay down the chain within set timeframes after they receive payment or hit a progress or retention milestone, with penalties (often including interest) for wrongful delay (Civ. Code §§8800, 8802). Retention — money withheld from each progress payment as security that the job gets finished and defects corrected — must be released within a defined period after the triggering event, commonly completion and acceptance (Civ. Code §8814).

The rule the exam most often tests: when a payment is only partly disputed, the paying party may withhold only the disputed amount — not the entire payment. Freezing the whole payment over a partial dispute is improper withholding and creates liability (often for interest and penalties). And retention cannot be held indefinitely — the clock to release it starts at the defined triggering event. (Retention mechanics also appear in Section 5, on the payments side of the contract.)

California example. A general contractor is satisfied with all but one item of a subcontractor's $50,000 billing, disputing $4,000 of it. Prompt-payment law lets the GC hold back the $4,000 in genuine dispute but requires it to pay the other $46,000 on time. Withholding the full $50,000 to pressure the sub would be improper and expose the GC to penalties and interest.

Limits that protect the paid-up homeowner

Lien rights are strong but not unlimited, and the exam tests the boundaries (Civ. Code §§8400, 8402). Two limits matter most. First, for an owner-occupied dwelling whose owner has paid the direct contractor in full, special rules can limit what unpaid subcontractors may recover against the home — the law is reluctant to make a good-faith homeowner pay twice for the same work, and homeowners have specific notice protections built into the scheme. Second, a claimant may lien only for the reasonable value of what it actually furnished — not an inflated number and not more than was really provided.

So the misconception that "a homeowner who fully paid the general can always be forced to pay the subs again through liens" overstates it — the paid-up owner-occupant has protections. (It is not an absolute shield, which is exactly why the §7159 mechanics-lien warning in Section 5 exists — an owner can still face exposure, so the rules balance both interests.) And a lien padded beyond the reasonable value furnished is vulnerable to challenge.

California example. A homeowner pays her general contractor the full contract price for a kitchen remodel. The GC pockets the money and never pays the cabinet subcontractor. Because this is an owner-occupied dwelling and she paid the direct contractor in full, lien-law protections limit the sub's ability to force her to pay a second time — one reason she was required to receive a mechanics-lien warning in her contract in the first place.

---

Key numbers & deadlines

Workers' comp — who must carry it: every employer, from the first employee (no minimum headcount); no-fault; generally the employee's exclusive remedy (Lab. Code §3700).

Workers'-comp certificate on file with CSLB: required as a licensing condition; lapse = automatic license suspension (B&P §7125, §7125.2).

No-employee exemption phase-out: already gone for C-8, C-20, C-22, C-39, D-49/C-61; ends for ALL classifications on 1/1/2028 (SB 216, as amended by SB 1455, Stats. 2024, Ch. 485). A blanket "every no-employee contractor must carry WC as of 2026" is wrong.

LLC liability insurance: $1,000,000 minimum, scaling up to $5,000,000 with member count — plus a separate $100,000 worker bond (B&P §7071.19; §7071.6.5).

Contractor's license bond: $25,000 — a bond (three-party; contractor repays claims), not insurance (B&P §7071.6).

Preliminary (20-day) notice: serve within 20 days of first furnishing; condition precedent to lien / stop-notice / bond rights (Civ. Code §8200 requires it; §8204 sets the 20-day deadline).

Record a mechanics lien: prime contractor — 90 days after completion (60 if notice of completion/cessation recorded); sub/supplier — 90 days (30 if notice of completion/cessation recorded) (Civ. Code §§8412, 8414).

Foreclose the lien: file suit within 90 days after the lien is recorded, or it expires — a separate clock from recording (Civ. Code §8460).

Stop payment notice: freezes undisbursed construction funds (Civ. Code §8500 et seq.). Payment bond claim: pursue the surety (Civ. Code §8600 et seq.). Both generally need the 20-day notice.

Prompt payment / retention: withhold only the disputed amount; release retention within the statutory window (Civ. Code §§8800, 8802, 8814).

Current-law flags: WC phase-out per SB 1455 (all classes 1/1/2028); liens use the modern Civ. Code §8000 et seq. numbering (operative 7/1/2012), not the old §3082 scheme.

---

Summary

Section 4 is compact but unforgiving, and it rewards precision. On the insurance side, start from the rule that every California employer must secure workers' compensation from its very first employee — a no-fault system that is the employee's exclusive remedy (Lab. Code §3700) and, for contractors, a licensing condition whose lapse triggers automatic suspension (B&P §7125). The one moving part you must track is the no-employee exemption phase-out: gone already for C-8, C-20, C-22, C-39, and D-49/C-61, and gone for everyone on January 1, 2028 under SB 216 as amended by SB 1455. Round that out by knowing the penalties for going uninsured (civil suit, lost exclusive-remedy shield, UEBTF, stop-work orders), the broad definition of employee (including the presumption that unlicensed workers doing licensed work are employees), the portfolio of business policies (general liability, builder's risk, property, auto — none of which covers employee injuries), the bond-versus-insurance distinction (three parties and repayment versus two parties and risk transfer), and the LLC's $1M–$5M liability requirement.

On the liens side, the mechanics lien is the core private-property remedy, open to primes, subs, suppliers, and laborers — but everything hinges on clocks. The 20-day preliminary notice is the gateway; miss it and most claimants lose all remedies. Recording deadlines run 90/60/30 days from completion (shortened by a recorded notice of completion), and a separate 90-day clock governs the foreclosure suit — two clocks, both fatal if missed. The stop payment notice reaches undisbursed funds and the payment bond reaches a surety, giving claimants alternatives to the lien, while prompt-payment and retention rules keep cash flowing and forbid withholding more than the disputed amount. Finally, owner-occupied dwelling limits protect the homeowner who already paid the direct contractor in full. Master the two lists — the insurances and the clocks — and this small section becomes reliable points.

Key takeaways

• One employee triggers workers' comp. Every California employer must secure it from the first hire; it is no-fault and generally the employee's exclusive remedy (Lab. Code §3700).
• The WC certificate is a license condition. A lapse causes automatic license suspension (B&P §7125, §7125.2).
• The no-employee exemption is phasing out, not gone. Already eliminated for C-8/C-20/C-22/C-39/D-49-C-61; all classifications by 1/1/2028 (SB 216 / SB 1455). Reject any "every no-employee contractor must carry WC as of 2026" answer.
• Uninsured is catastrophic. Civil suit with lost defenses, loss of the exclusive-remedy shield, UEBTF recovery, penalties, stop-work orders (Lab. Code §§3706, 3715).
• "Employee" is broad. Unlicensed workers hired for licensed work are presumed employees; the ABC test still governs; not all officers are excluded (Lab. Code §§3351, 3352).
• Match the policy to the risk. General liability = third parties; builder's risk = the project under construction; property = the contractor's own assets; auto = vehicles — and none covers employee injuries (that's workers' comp).
• A bond is not insurance. Surety bond = three parties, and the contractor repays paid claims; insurance = two parties, risk transferred, no chargeback (B&P §7071.6).
• LLCs carry more. Liability insurance $1M scaling to $5M with member count, plus a separate $100,000 worker bond (B&P §7071.19).
• A mechanics lien is a private-property remedy open to primes, subs, suppliers, and laborers — never against public property (Civ. Code §§8400, 8402).
• The 20-day preliminary notice is the gateway. Miss it and most claimants lose lien, stop-notice, and bond rights entirely (Civ. Code §8200).
• Two lien clocks, both fatal. Record within 90/60/30 days of completion (§§8412, 8414); then foreclose within 90 days of recording (§8460).
• Stop payment notice vs. payment bond. One freezes undisbursed funds (§8500); the other pursues a surety (§8600) — both usually require the 20-day notice.
• Withhold only what's disputed; release retention on time (Civ. Code §§8800, 8802, 8814).

---

Sources

Official California primary law, cited to the Legislative Information site (leginfo.legislature.ca.gov) and the CSLB Law Book. Statutory figures reflect law in force as of the 2026 edition. The workers'-comp no-employee exemption phase-out reflects SB 216 (2022) as amended by SB 1455 (Stats. 2024, Ch. 485), moving the all-classifications date to 1/1/2028. Mechanics-lien citations use the modern Civil Code §8000 et seq. scheme (operative 7/1/2012).

• Cal. Lab. Code § 3700 — every employer must secure workers' compensation (insure or self-insure); no-fault, exclusive-remedy framework.
• Cal. Lab. Code §§ 3351, 3352 — definition of "employee" for workers' comp; broad inclusion, narrow exclusions, presumption for unlicensed workers doing licensed work.
• Cal. Lab. Code §§ 3706, 3715 — consequences of being an uninsured employer: civil suit with lost defenses, loss of exclusive-remedy protection, Uninsured Employers Benefit Trust Fund, penalties.
• Cal. Bus. & Prof. Code § 7125; § 7125.2 — workers'-comp certificate (or valid exemption) on file with CSLB as a licensing condition; automatic suspension on lapse. No-employee exemption phase-out: SB 216 (Stats. 2022), as amended by SB 1455 (Stats. 2024, Ch. 485) — already effective for C-8, C-20, C-22, C-39, D-49/C-61; all classifications 1/1/2028.
• Cal. Bus. & Prof. Code § 7071.6 — $25,000 contractor's license bond (illustrating the surety-bond structure).
• Cal. Bus. & Prof. Code § 7071.6.5 — LLC $100,000 employee/worker bond (separate from the liability insurance).
• Cal. Bus. & Prof. Code § 7071.19 — LLC liability insurance: $1,000,000 minimum, scaling with membership up to $5,000,000.
• Cal. Civ. Code § 8200 & § 8204 — preliminary notice: §8200 requires it, §8204 sets the 20-day deadline; condition precedent to lien, stop-payment-notice, and bond-claim rights.
• Cal. Civ. Code §§ 8400, 8402 — who may claim a mechanics lien; owner-occupied dwelling and reasonable-value limitations.
• Cal. Civ. Code §§ 8412, 8414 — deadlines to record a mechanics lien: prime contractor 90 days after completion (60 if a notice of completion/cessation is recorded); subcontractor/supplier 90 days (30 if a notice of completion/cessation is recorded).
• Cal. Civ. Code § 8460 — deadline to file suit to foreclose (enforce) a recorded lien: 90 days after recording, or the lien expires.
• Cal. Civ. Code § 8500 et seq. — stop payment notice (withholding of undisbursed construction funds).
• Cal. Civ. Code § 8600 et seq. — payment bond claims on private works of improvement.
• Cal. Civ. Code §§ 8800, 8802, 8814 — prompt-payment obligations down the chain and retention-release timing; only disputed amounts may be withheld.
• CSLB, California Contractors License Law & Reference Book (2026 ed.) — reprints B&P Code Chapter 9 and CSLB regulations with commentary.
• CSLB, Law and Business Study Guide — official exam content outline (Section 4: Insurance and Liens).

The business-insurance coverage concepts in Part B — general liability, builder's risk, commercial property, commercial auto, and the surety-vs-insurance distinction — are standard insurance principles with no single California code section (except the LLC insurance/bond requirements, which are statutory), and are presented as business practice.