You run the business. We take one application to 14 appointed California carriers and hand you back a real comparison — every quote, every declination, and the reason for each. Then you decide.
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See a live WCIRB-rated pricing indication in about two minutes, then complete and sign the official ACORD 130 workers compensation application right here — no printing, no PDFs to email. A licensed broker shops your risk across our 14 appointed California carrier markets.
You shouldn't need to learn rating-bureau jargon to know you're paying the right price. Here's what working with an independent broker actually gets you.
You work directly with Aaron Bollinger — the licensed broker who shops your account. No queue, no ticket number, no automated system.
Every renewal: who was submitted, who quoted, who declined, and why. If a broker can't answer all three, they didn't shop the market.
Misclassification gets caught at your payroll audit and billed retroactively. We review your codes before they go to market — not after.
Claims reporting strategy, reserve-accuracy reviews, return-to-work programs, and audit prep — the work that actually moves your ex-mod.
Carrier appetite, class codes, and claims patterns are different in every trade. Start with the guide written for yours.
High-rate codes, subcontractor COIs, and the carriers that actually want the work.
Construction guide →Slip-and-fall frequency, kitchen ergonomics, and hospitality-friendly markets.
Restaurant guide →From physician offices to home health — where the exposure really sits.
Healthcare guide →Long-haul vs local codes, driver classification, and monopolistic-state issues.
Trucking guide →Machine-shop codes, ergonomics programs, and schedule-credit leverage.
Manufacturing guide →Store codes, seasonal payroll swings, and keeping clerical staff coded right.
Retail guide →Field vs maintenance codes and the loss patterns underwriters price for.
Landscaping guide →Janitorial, auto services, security, professional offices, and more.
Browse all guides →Workers compensation is mandatory for every California employer with one or more employees. The WCIRB governs the rating system — but understanding the three inputs that set your price gives you the leverage to control it. Run your own numbers in the calculator →
Your premium starts with your total payroll by classification. Every dollar paid to employees — wages, salaries, commissions, holiday pay, and most bonuses — counts toward the premium calculation base. Each employee is assigned a class code that reflects their actual job duties, not their title.
The WCIRB publishes advisory pure premium rates for each of the hundreds of class codes, derived from actual California claims data. A clerical employee (8810) carries a rate of $0.15 per $100 of payroll. A roofer (9554) carries $14.22. The difference reflects the actual frequency and cost of injuries in each occupation across the state.
After three years in business and meeting a payroll threshold, WCIRB calculates your experience modification factor. This multiplier — ranging from 0.50 to 1.50 and beyond — compares your actual claims costs to what WCIRB expects for a business of your size and type. Better than average means a credit mod below 1.00, directly reducing your premium.
The WCIRB (Workers' Compensation Insurance Rating Bureau of California) calculates your experience modification factor — universally called the "ex-mod" or "mod" — as a multiplier applied to your manual premium. A mod of 1.00 means your claims history is exactly average for your industry and size. Below 1.00 means you've had fewer or less costly claims than expected — you pay less. Above 1.00 means the reverse — your premium is surcharged, sometimes substantially.
The calculation compares your actual incurred losses over a three-year experience period against "expected losses" — what WCIRB projects a business of your payroll size and class codes would normally incur. The formula weights frequency more heavily than severity: many small claims hurt your mod more than one large claim of equal total cost. And because the mod uses three prior policy years, one bad claims year follows you for three consecutive renewals.
Small claims that look minor — a sprained ankle, a laceration requiring stitches — can stay open in carrier reserve systems for 12-18 months if there's any uncertainty about recovery. High reserves inflate your mod even if the claim ultimately costs very little to settle. An active broker works with your carrier's claims team to ensure reserves reflect actual probable cost, not worst-case estimates. Reserve accuracy is a legitimate subject of broker advocacy.
Your current ex-mod is on the declarations page of your workers comp policy — typically at the top near the premium calculation table. You can also request your Unit Statistical Report directly from WCIRB at wcirb.com. If you haven't seen yours, ask your broker to pull it before your next renewal — and if your broker can't explain the calculation, that's a sign. For the full breakdown, including strategies for bringing a high mod back down, read our complete experience modification guide →
Formula Reference
Manual Premium =
(Payroll ÷ 100)
× Pure Premium Rate
× Ex-Mod
× LCM
LCM = Loss Cost Multiplier
(carrier-specific, typically 0.85–1.20)
Workers comp premiums are calculated using WCIRB class codes — four-digit codes that correspond to specific job descriptions and carry advisory pure premium rates based on that occupation's actual injury history across California. Carriers are required to assign codes based on the actual duties performed, not the employee's title or the employer's preference. Misclassification — whether accidental or intentional — is caught at annual payroll audit, and the result is a retroactive premium adjustment that can be substantial. An independent broker reviews your class code assignments before every renewal — not just at audit — to catch problems before they become retroactive charges, and to identify legitimate reclassification opportunities that reduce your premium. Find your codes in the class code directory →
| Code | Description | Approx Rate per $100 |
|---|---|---|
| 8810 | Clerical — office employees | $0.15 |
| 5537 | Plumbing — not residential | $10.22 |
| 5190 | Electrical wiring — commercial | $5.38 |
| 5403 | Carpentry | $8.14 |
| 9079 | Restaurant / food service | $3.42 |
| 8832 | Physicians' office | $0.50 |
| 8017 | Store — retail | $2.02 |
| 6217 | Landscaping operations | $7.62 |
Five factors drive your workers comp premium: total payroll by classification, the WCIRB pure premium rate for each code, your experience modification factor, your carrier's loss cost multiplier, and any schedule credits or debits applied at underwriting.
| Industry Tier | Approx Rate Range per $100 | Examples | Risk Level |
|---|---|---|---|
| Office / Professional | $0.15 – $0.80 | Clerical, attorneys, accountants, software | Low |
| Retail / Service | $1.50 – $3.50 | Retail stores, food markets, auto dealers | Medium |
| Hospitality | $2.50 – $4.50 | Restaurants, hotels, catering operations | Medium |
| Healthcare | $0.50 – $5.50 | Physicians (low) to home health aides (high) | Med-High |
| Construction — Medium | $5.00 – $9.00 | Electrical, plumbing, HVAC, concrete | High |
| Construction — Heavy | $9.00 – $15.00 | Roofing, structural steel, demolition | High Risk |
The most durable premium reductions come from managing the factors that drive your ex-mod and presenting your risk favorably to underwriters. These are the six highest-leverage programs.
California requires every employer to maintain a written Injury and Illness Prevention Program (IIPP) under Cal/OSHA (Labor Code Section 6401.7). The program must designate a responsible person, establish a hazard communication system, provide training, and document inspections and injury investigations. Beyond legal compliance, a well-documented IIPP signals to underwriters that your business takes loss prevention seriously. Many carriers offer schedule credits of up to 5% specifically for documented safety programs — and some specialty carriers require it as a condition of coverage.
When an employee is injured, claim cost is driven not just by medical expenses but by indemnity payments — the wage replacement paid during recovery. California's temporary total disability benefit pays two-thirds of pre-injury wages for the duration of inability to work. A return-to-work program that offers modified or transitional duty compresses this period dramatically. Employers who bring injured workers back to modified duty within the first 30 days of a claim typically see 30-60% lower indemnity costs. The California DIR Supplemental Job Displacement Benefit also creates real exposure — RTW programs directly reduce this liability.
California Labor Code requires employers to provide a DWC-1 claim form within one working day of learning of an injury. But legal compliance isn't the same as strategic management. Claims reported within 24 hours are typically assigned to an adjuster, have medical treatment authorized, and begin coordinated management immediately. Claims that sit unreported for a week develop higher reserves, slower medical resolution, and more attorney involvement. Every day of delay changes the claim trajectory — and trajectory determines reserve, and reserve determines mod impact. Report everything, immediately, regardless of severity.
Post-offer, pre-employment physical examinations are permitted under California's FEHA and the federal ADA, provided they are offered after a conditional job offer, required of all candidates for the same position, and conducted by a licensed medical professional. Physicals do not allow you to reject candidates with pre-existing conditions — that would be disability discrimination. But they document the condition at hire, which can be critical if a future workers comp claim attempts to attribute pre-existing injuries entirely to your workplace. The physical creates a baseline medical record that protects you at apportionment hearings.
Repetitive motion injuries — carpal tunnel syndrome, rotator cuff damage, lumbar strain — are among the most expensive workers comp claims because they take months or years to resolve, involve surgery in many cases, and often result in permanent partial disability awards. Cal/OSHA Section 5110 requires employers with repetitive motion jobs (two or more employees with musculoskeletal injuries in 12 months) to have a formal ergonomics program. Warehouse operations, restaurant kitchen staff, and home health aides face particularly high exposure. Proactive ergonomics — workstation audits, rotation schedules, mechanical assist equipment — reduces frequency of these high-cost claims before OSHA requires it.
If your business uses subcontractors, your workers comp carrier will audit whether those workers are truly independent — and if they determine they are not, or if you cannot demonstrate they had their own coverage, their estimated payroll gets added to your audit total. Requiring certificates of insurance (COIs) from every subcontractor, with your business listed as additional insured, is the first step. The COI must show active workers comp coverage with policy limits and expiration dates. Track expiration dates actively and require renewed certificates before they lapse — an expired COI at audit creates the same exposure as no COI at all.
Three questions every California business owner should be able to answer at renewal. Expand each for the honest broker's take.
California's workers comp market is not static. Carriers enter and exit the state, adjust their underwriting appetite by industry, and change their pricing philosophy based on their own loss experience and reinsurance costs. A carrier that was the lowest-priced option at your last renewal may have tightened their program and now prices 20% above market — or may have introduced new schedule credit programs that make them suddenly the best option. The only way to know is to shop.
Your own risk profile changes too. If you've had a clean claims year, your ex-mod is improving — and carriers who wouldn't previously quote you may now view your account favorably. An improving mod trend is one of the strongest marketing tools an independent broker has. A carrier looking at your account in year three of a clean-claims trend prices that trajectory very differently than the same carrier looking at static data.
Independent brokers with a full slate of carrier appointments can place your risk across the market and present a genuine comparison. A captive agent — working for one carrier — has no ability to shop your coverage. When they tell you "we found the best price," they mean the best price available from one company. That is structurally different from a broker who can say "we submitted to twelve carriers and here are all twelve quotes with decline reasons for those that didn't offer."
An established carrier relationship has real value at claims time. A carrier who has underwritten your account for three years, received your loss runs annually, and watched your safety program evolve handles a new claim very differently than a carrier seeing your account for the first time. The new carrier's claims team has no context — they're working from your loss runs and policy documents. The incumbent carrier knows your supervisors, knows the job sites, and has a relationship with your HR team. That institutional knowledge changes how reserves are set and how aggressively claims are managed toward closure.
Mid-term cancellations — switching carriers before policy expiration — create accounting complications with loss run reporting. When a carrier takes over mid-term, the new carrier sees incomplete loss runs for the current year. This can temporarily distort loss history presentation at subsequent renewals, particularly if you switch again in year two. Stability has underwriting value. Some carriers operate loyalty programs that offer additional schedule credits for accounts that renew with a clean record for three or more consecutive years.
The honest truth is this: your broker should present renewal options every year, showing you the full market comparison. But a broker who always recommends switching carriers — regardless of your situation — is optimizing for new-business commission, not your premium. New business placements typically earn brokers higher commission rates than renewals. An advisor working in your interest will explain why staying with your current carrier might be the right decision for your specific account in this specific year.
1. Full market presentation. How many carriers were submitted? Who quoted, who declined, and why did the declines happen? If your broker can't answer all three parts of that question, they didn't actually shop the market — they made a judgment call about where to submit and stopped when they got a quote they could present.
2. Loss run review. What is your current five-year loss history, how is it trending, and what is the projected mod trajectory for the next three years based on current open reserves? A broker should provide this analysis, not just forward your loss runs to carriers.
3. Class code audit. Before every renewal, your broker should review all class codes assigned to your payroll. Not at audit — before renewal. Catching misclassification before it goes to market means you're presenting your risk correctly from day one, not correcting it retroactively at higher cost.
4. Ex-mod trajectory analysis. If you have open claims, what is the projected reserve run-off over the next 12-24 months, and how does that affect your mod at each of the next three renewals? Your broker should model this — it changes the calculation about whether to switch carriers or stay.
5. Claims handling strategy. Who is actively managing your open claims? Are they being steered toward closure? Are reserves being reviewed for accuracy? A broker who only engages at renewal time is leaving money on the table in the claims year that determines your mod.
28 employees. Ex-mod of 1.32 following a scaffolding fall that left three claims open. Premium had increased 34% at last renewal. Carrier was threatening non-renewal.
We reviewed all class codes and found a project supervisor miscoded under 5403 (carpentry, $8.14/100) who qualified for a split between field and office duties. Implemented a formal RTW program. Worked with the carrier's claims adjuster to review reserves on the largest open claim — reserves were reduced by $22,000 when the treating physician confirmed full recovery was expected within 90 days.
→ Ex-mod dropped to 1.08 at next WCIRB unit stat. Carrier renewed. Premium declined 19%.
3 locations, 95 employees. Multiple admitted carriers had declined to quote due to prior slip-and-fall frequency: 7 claims in 3 years, $112,000 total incurred.
Placed coverage with an E&S market carrier specializing in hospitality risks. Implemented a documented floor safety protocol — non-slip mats at all stations, hourly inspection logs, mandatory non-slip footwear policy. Premium increased 12% from prior admitted carrier — but coverage was restored. Shopped back to the admitted market at year 2 renewal.
→ Clean year 1 with no lost-time claims. Three admitted carriers quoted at renewal. Placed with ICW Group at 6% below the E&S premium.
210 employees, primarily home health aides (code 8825, $4.62/100). $3.2M annual payroll. Annual premium of $147,840 at 1.00 mod.
Reviewed the full personnel roster and job descriptions. Identified 28 intake coordinators and scheduling staff who worked exclusively from a central office — these employees had been coded 8825 with the field staff. Reclassified them to 8810 (clerical office employees, $0.15/100). Total payroll shift: $680,000.
→ Annual premium reduction of approximately $30,600 on manual premium. Carrier agreed. Class code split held at audit and subsequent renewal.
Access to more markets isn't just about price competition — it's about finding the carrier whose underwriting appetite and claims handling philosophy fits your risk profile. Some carriers specialize in construction and have dedicated loss control consultants who visit your job sites. Others focus on healthcare and understand the nuances of home health exposure. Placing your coverage with the right carrier — not just the cheapest one — matters at claims time.
For risks that admitted carriers decline — whether due to loss history, ex-mod above 1.40, or specific hazard exposure — we access the surplus lines market, including Lloyd's of London syndicates and specialty programs designed for California's unique regulatory environment. State Fund remains available as the insurer of last resort for any California employer.
Appointed Carriers
The most comprehensive California WC resource library — written by licensed brokers, updated regularly, and free to use.
WCIRB rates for 48 California codes — each with an instant payroll calculator. Find your classification and see what it costs.
📈The complete guide to California ex-mod. Formula, strategies, Unit Stat auditing, and how to lower your number.
💰Industry benchmarks, premium calculations, audit exposure, and what it realistically costs to insure your workforce.
🏥What to do in the first 24 hours, return-to-work strategy, DWC-1 forms, and how claims affect your premium.
🏢Who writes California WC, how LCMs work, what underwriters look for, and how to choose the right market.
📋Real California employers. Mod reductions, renewal savings, class code fixes, and assigned risk exits.
❓42 expert-answered questions covering every aspect of California workers comp, from basics to advanced strategy.
🧮Live WCIRB 2025 rates. Enter your class code, payroll, and ex-mod — instant formula breakdown with carrier LCM range.
📖73+ terms defined: ex-mod, LCM, MPN, WCIRB, primary losses, unit stat, C&R, IIPP, and every other term in your policy.
⚖️Labor Code §3700, DWC-1 deadlines, penalty exposure, 2026 benefit rates, AB 5 classification, and employer posting requirements.
🏗️Deep-dive guides for 11 California industries — construction to trucking to professional offices. Class codes, claims patterns, underwriting, and cost reduction.
🧮Live WCIRB rate calculator. Upload your policy or enter your details — our broker team shops our 14 appointed markets.
Takes about 4 minutes. No commitment. We'll review your class codes, ex-mod, and current pricing — and show you what the full California market has to offer.
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