Workers' compensation
Workers' comp, explained without the hedging
What the policy actually does, how the premium is built, and what an underwriter wants to see when your loss history isn't clean.
Coverage
What a workers' comp policy covers
Specific benefits, limits, and eligibility are set by California law and by your policy — this is the general shape of it.
Medical treatment
Care for a work-related injury or illness, typically with no deductible or copay for the employee.
Wage replacement
A portion of lost wages while an injured employee is unable to work, subject to state schedules and waiting periods.
Permanent disability
Benefits where an injury leaves a lasting impairment, rated under state guidelines.
Death benefits
Support for dependents after a fatal workplace injury, including burial expenses.
Employer's liability
The second half of a standard policy, responding to certain injury suits brought against the employer.
Claims handling and defense
The carrier investigates, administers, and defends claims filed under the policy.
The math
How your premium is built
Every workers’ comp premium starts from the same place: payroll, divided into class codes, priced at a rate per $100 of payroll. Everything after that is an adjustment.
Your experience mod sits in the middle of that chain, which is why it has such leverage — it multiplies the whole manual premium rather than adding a fixed charge.
- 1
Manual premium
Payroll ÷ 100 × class rate
Repeated for each class code, then added together.
- 2
Modified premium
× experience mod
Above 1.00 is a debit; below 1.00 is a credit.
- 3
Carrier adjustment
× schedule credits or debits
Carrier's underwriting judgment, where the state allows it.
- 4
Final premium
+ expense constant, assessments, surcharges
State and carrier fees layered on the end.
Underwriting
What an underwriter looks at
On a difficult account, the file matters as much as the numbers. A well-documented submission gets read; a thin one gets declined.
- Three to five years of loss runs, valued recently
- Your current experience modification worksheet
- Payroll by class code, and how the split is justified
- Whether claims are open or closed, and how reserves have moved
- Return-to-work and light-duty practices
- Written safety program, training records, and any OSHA history
- Use of subcontractors and whether certificates are collected
- Prior carriers, and the reason each relationship ended
What to have ready
You don’t need any of this to start a conversation — but having it speeds the whole process up considerably.
- Loss runs for the last 3–5 years from each prior carrier
- Current declarations page and policy number
- Most recent experience rating worksheet
- Payroll by class code and employee count
- Renewal date and any non-renewal notice you've received
- A short written summary of what changed after your worst claims
When someone gets hurt
The hours that decide what a claim costs
A workers' comp policy pays the bill. What determines the size of the bill is how the first day is handled — and that is a service, not a coverage form.
24-hour first aid response
An injury reported at 2am gets a response at 2am. Getting care in front of an employee immediately is the single cheapest thing you can do about your mod, because the claim that never opens never enters your experience.
- Available 24 hours a day, every day, with a 45-minute average response time.
- 87% of reported injuries are resolved as first aid rather than becoming claims.
- Early, documented care measurably reduces the rate at which injuries turn into litigation.
- resolved without a claim
- 87%resolved without a claim
- average response
- 45 minaverage response
Claims management from hour one
What happens in the first two days sets the reserve, and the reserve is what your mod is rated on. We don't leave that window to chance.
- A strategy call within the first 24–48 hours of a clinic referral.
- Direct follow-up with the injured employee, so they hear from a person, not a form letter.
- All incident and injury forms filed correctly and on time.
- Medical treatment arranged and tracked through to resolution.
Fast, safe return to work
The longer an injured employee sits at home, the more the claim costs and the harder they are to bring back. We place people into appropriate modified duty quickly, and the numbers hold up.
- 98% placement success rate, averaging 2 days from injury to placement.
- Re-injury or litigation on placed employees runs under 0.01%.
- Over $4,000 average savings per claim.
- Avoids disability syndrome and protects morale across the rest of your crew.
- placement success
- 98%placement success
- average placement
- 2 daysaverage placement
- average saved per claim
- $4,000+average saved per claim
Anti-fraud training
Most fraudulent claims are opportunistic, and they stop being opportunistic once everyone in the room understands the consequences.
- Bilingual safety professionals present at a company-wide meeting.
- Employees hear plainly what filing a fraudulent workers' compensation claim actually risks.
- Delivered on your site, in the language your crew works in.
Figures shown are Excelsure program results reported across member accounts. Past results do not guarantee a particular outcome, premium, experience modification factor, or offer of coverage for any individual business.
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Workers' comp FAQ
How is workers' comp premium calculated?
The base formula is payroll per $100, multiplied by the rate for each class code, summed across your classifications. That produces manual premium. Your experience mod is then applied as a multiplier, followed by carrier-specific credits or debits, expense constants, assessments, and any state surcharges.
Am I required to carry it?
In California, yes — from the very first employee, with no small-employer exemption. Rules for owners, officers, and family members have their own tests, and treating someone as an independent contractor who does not qualify is a common and expensive mistake that usually surfaces at audit or after an injury.
What is the state fund or assigned risk plan?
In California that is State Fund, the market of last resort for employers who cannot find coverage voluntarily. It fills a real need, but it is usually more expensive and comes with fewer options, so it's worth confirming the voluntary market has genuinely been exhausted first.
What is a class code and why does it matter so much?
Class codes describe the work your employees perform, and rates differ sharply between them — roofing and clerical are not remotely close. Payroll assigned to the wrong code inflates both your premium and, over time, your mod, and it usually surfaces at audit.
What happens at a premium audit?
After the policy period the carrier verifies actual payroll and classifications against what was estimated. If you underestimated, you owe the difference; if you overestimated, you're credited. Disputed audits are one of the more common reasons businesses come to us mid-term.
Can I lower my premium without changing my mod?
Sometimes. Correcting class code assignments, adjusting deductible or dividend structures where a state allows them, qualifying for a carrier's schedule credit, or simply reaching markets your current agent didn't approach can all move the number. None of it is guaranteed — it depends on the carrier and on what California rules allow.
Not ready to talk yet?
Start with the handbook: X-Mod Made Simple
A plain-English guide to how your experience modification factor is calculated, what drives it up, and what you can do about it. Written by Mark Habibeh for owners, not underwriters.
- How the experience mod is actually calculated, in plain English
- Why one bad year follows you for three
- The reporting errors that quietly inflate your mod
- What you can do before renewal, and what's too late to fix
PDF, First Edition. Free, no call required.
Let's look at your workers' comp together
Send us your renewal date and current mod. We'll tell you honestly what we see and what options are realistic.
Monday – Friday, 8:00am – 5:00pm PT