Small Business Health Insurance California: Rules and Costs

Medically reviewed by Jawad Arshad, MD, FACEP. Last reviewed: October 5, 2026.

Small business health insurance in California is a group plan an employer offers to its workers, and California law treats an employer with up to 100 employees as small. The state has its own marketplace for small employers, its own continuation rules, and 19 rating regions. This guide covers the California rules, the cost data, and one way to lower what the plan costs your payroll.

Key facts

• California defines a small employer as one with at least 1 but no more than 100 employees, counted with the federal full-time equivalent method (California Health and Safety Code, Section 1357.500).
• Covered California for Small Business serves employers with 1 to 100 employees, enrolls year-round, and offers four carriers (Covered California, 2026).
• Cal-COBRA gives up to 36 months of continuation coverage to people in groups of 2 to 19 employees (California Department of Managed Health Care).
• California has 19 geographic rating areas for individual and small group plans (CMS).
• The median proposed 2027 small group premium increase nationally is 14% (Peterson-KFF Health System Tracker, August 2026).
• Average annual premiums at firms with 10 to 199 workers were $9,211 for single coverage and $26,054 for family coverage in 2025 (KFF Employer Health Benefits Survey, 2025).

What is small business health insurance in California?

Small business health insurance in California is group medical coverage that an employer sponsors for its employees, with the employer picking the plan and sharing the premium. California covers employers with 1 to 100 employees, a wider band than the federal 1 to 50 used in many states.

California Health and Safety Code Section 1357.500 defines a small employer as one with at least one but no more than 100 employees, most of them employed in California, for plan years starting in 2016 or later. Employers count staff with the federal full-time equivalent method in Section 4980H(c)(2) of the Internal Revenue Code. For plan years from 2019, sole proprietors, partners and their spouses do not count as employees when deciding whether a business has one employee (California Health and Safety Code, Section 1357.500).

California small employers have three main routes. A fully insured group plan is the most common, and a level-funded plan can cost less for a healthy group. An individual coverage HRA lets employees shop for their own plan. Our level-funded health plan guide and ICHRA guide cover the last two. Summit Health Benefits also publishes a California small business health benefits page and a national small business health insurance overview.

What is Covered California for Small Business?

Covered California for Small Business is the state marketplace where employers with 1 to 100 employees buy group health and dental plans. Enrollment is year-round, so you can add or remove employees without waiting for a window.

Covered California says employers can request a quote and a team follows up within two business days with plan options and pricing. The marketplace lists four carriers: Blue Shield of California, Kaiser Permanente, Sharp Health Plan and Western Health Advantage. Plans come in four tiers, Platinum, Gold, Silver and Bronze, and an employer that offers more than one tier must choose adjacent tiers only (Covered California, 2026). Covered California also says small employers may qualify for a federal tax credit worth up to 50% of premium contributions, with the IRS making the final determination.

Not every carrier sells through the marketplace. Carriers and brokers outside it sell group plans to the same employers, so compare both. Our best small business health insurance guide lists carriers, and our group health insurance quotes checklist covers what a broker needs from you.

How much does small business health insurance cost in California?

Small business health insurance in California costs about what it costs employers nationally, and 2027 filings point higher. KFF reports averages by firm size but not by state, so the national numbers below are the best sourced benchmark.

Table: 2025 average group premiums at firms with 10 to 199 workers, and the 2027 outlook

Source: KFF Employer Health Benefits Survey (2025) and Peterson-KFF Health System Tracker (August 2026). Monthly figures are annual averages divided by 12. Worker and employer amounts apply KFF's average worker shares to the average premium. These are national figures, not California quotes.

California prices vary by region because the state sets 19 geographic rating areas for individual and small group plans (CMS). A San Francisco employer and a Fresno employer can see very different quotes for the same plan. The 2027 request for small group coverage is a proposal, not a final rate, so treat the 14% median as a signal to get quotes early. In the individual market, Covered California announced a preliminary 9.9% weighted average rate increase for 2027 (Covered California, July 2026).

Here is what the averages mean for payroll. A California employer with 12 employees on single coverage at the KFF averages pays $110,532 a year in total premium, of which the employer pays $92,846.88 and workers pay $17,685.12 (KFF, 2025, calculated). If a 2027 renewal lands at 14%, total premium rises by $15,474.48 a year, to $126,006.48. This is an illustration built from national averages, not a quote.

How does a Section 125 plan lower a California employer's health plan cost?

A Section 125 cafeteria plan lets employees pay their share of premiums with pay that has not been taxed yet. That lowers the wages the employer pays payroll tax on.

The employer FICA rate is 7.65%, which is 6.2% Social Security plus 1.45% Medicare (IRS Tax Topic 751, 2026). Take the 12-employee example above. Each worker pays $1,473.76 a year toward single coverage. Moving that pre-tax saves the employer 7.65% of $17,685.12, which is $1,352.91 for the team. Each worker saves too. At the same $1,473.76, an employee in the 12% federal bracket saves about $176.85 in income tax plus $112.74 in FICA, about $289.59 a year (IRS Tax Topic 751, 2026; IRS 2026 inflation adjustments).

Premium contributions alone produce a modest number, because workers pay a small share of single coverage. Summit Health Benefits runs a Section 125 plan with a $35 per enrolled employee per month administration fee that is paid out of the FICA savings the plan creates. Summit's plan design produces employer FICA recapture of about $91 to $136 per enrolled employee per month, so the employer nets about $56 to $101 per enrolled employee per month (Summit Health Benefits, 2026). Your number depends on which benefits run through the plan, so run the Section 125 savings calculator with your headcount and premiums. Our Section 125 cafeteria plan guide explains how the plan works.

What are the small group health plan options for California employers?

California small employers can buy a fully insured group plan, a level-funded plan, or fund an individual coverage HRA. Each fits a different size, budget and risk tolerance.

A Section 125 plan sits on top of the first three. It does not replace the plan, it changes how employees pay their share. See our small business health insurance plans comparison for QSEHRA and SHOP too.

What happens when a California employee leaves a small group plan?

A California employee who leaves a small employer can keep group coverage under Cal-COBRA for up to 36 months if the group has 2 to 19 employees. Federal COBRA covers larger groups.

The California Department of Managed Health Care says people who qualify have 60 days after being notified to sign up and 45 days to pay the first premium after submitting the enrollment form. If federal COBRA ran out at 18 months, 18 more months of Cal-COBRA may be available, for up to 36 months in total (California Department of Managed Health Care). The employee pays the premium. California employers under 20 employees should put these rules in their termination checklist. Our COBRA guide explains the federal rules, and our COBRA alternatives guide covers what a departing worker can do next.

Is there a tax credit for small business health insurance in California?

Yes. The federal small business health care tax credit can cover up to 50% of premiums for qualifying employers, and it is not limited to California. It applies to employers with fewer than 25 full-time equivalent employees whose average wages are below the IRS limit, generally through a SHOP Marketplace plan, and it runs for 2 consecutive tax years (IRS, Instructions for Form 8941, 2025).

Covered California for Small Business points employers to the same federal credit (Covered California, 2026). Ask a broker whether your group qualifies before you count on it. Our small business health care tax credit guide has the worked math and the wage limit.

How do I get small business health insurance quotes in California?

You get quotes by giving a broker or carrier your employee census, your ZIP codes and your current plan. Ask for at least three quotes and compare the deductible and out-of-pocket maximum, not only the premium.

Copy and send this request, and fill in the brackets:

Subject: Small group health insurance quote request, [Company Name], California

>

Hello, I run a business in [City], California with [number] employees. I would like quotes for a [January 1 / other] effective date. Please quote a fully insured plan, a level-funded plan if available, and a Covered California for Small Business option. Attached is my census with each employee's age and ZIP code. I plan to contribute [percent] of the employee-only premium. Please include the deductible, out-of-pocket maximum, network and 2027 renewal outlook for each option. Thank you.

Frequently Asked Questions

Sources: California Health and Safety Code, Section 1357.500, Small employer definition (California Legislature, via FindLaw); Covered California, Covered California for Small Business overview and health plans pages (2026); Covered California, 2027 rates and plans press release (July 2026); California Department of Managed Health Care, Keep Your Health Coverage (COBRA); CMS, California geographic rating areas; KFF, 2025 Employer Health Benefits Survey (2025); Peterson-KFF Health System Tracker, How much and why premiums are going up for small businesses in 2027 (August 2026); IRS, Employer Shared Responsibility Provisions; IRS Tax Topic 751 (2026); IRS, 2026 tax inflation adjustments (2025); IRS, Instructions for Form 8941 (2025); Summit Health Benefits, Section 125 program terms (2026).