If you don’t have health insurance in California, you’ll owe a tax penalty of at least $950 per adult when you file your state return. Beyond the financial hit, you’ll face the full cost of any medical care out of pocket, though you do have options for affordable or free coverage that many residents don’t realize they qualify for.
The Tax Penalty
California has its own individual health insurance mandate, separate from the federal government’s. Since January 1, 2020, every California resident must either carry qualifying health coverage, qualify for an exemption, or pay a penalty on their state tax return.
For the 2025 tax year (filed in 2026), the penalty is at least $950 per uninsured adult and $475 per uninsured dependent child under 18. A family of four without coverage for the entire year would owe at least $2,850. The actual amount can be higher depending on your household income, because the penalty is calculated as either the flat dollar amount or a percentage of your income, whichever is greater. You report and pay it on your California state tax return using Form 3853, which attaches to your standard filing.
The penalty applies for each full month you lack coverage, so if you were uninsured for only part of the year, you’ll owe a proportional amount rather than the full annual figure.
Exemptions That Waive the Penalty
Not everyone who goes without insurance owes the penalty. California recognizes several exemptions, including situations where the lowest-cost plan available to you would exceed a certain percentage of your household income (making coverage unaffordable), short gaps in coverage of three months or less, membership in a recognized health care sharing ministry, certain hardships like eviction or bankruptcy, and income below the state filing threshold. You claim these exemptions on the same Form 3853 when you file your taxes.
What Happens When You Need Medical Care
Without insurance, routine care gets expensive fast. A single urgent care visit can run $200 to $500, and a trip to the emergency room easily reaches thousands of dollars. Preventive care like screenings and blood work, which insurers cover at no cost, comes entirely out of your pocket.
Federal law does protect you in emergencies. Under EMTALA, any hospital emergency department that accepts Medicare funding (which is nearly all of them) must screen you for an emergency medical condition and stabilize you regardless of whether you have insurance, can pay, or are a U.S. citizen. The hospital cannot turn you away based on your coverage status, race, disability, or any other characteristic. But “stabilize” is the key word. Hospitals are required to treat you until your condition won’t get materially worse. They are not required to provide follow-up care, ongoing treatment, or elective procedures. And you will still receive a bill for whatever emergency services you received.
Coverage You Might Already Qualify For
Many Californians who think they can’t afford insurance actually qualify for free or heavily subsidized coverage. The two main programs to check are Medi-Cal and Covered California.
Medi-Cal
Medi-Cal is California’s Medicaid program, and it covers residents with household incomes up to 138% of the federal poverty level. For a single adult in 2025, that’s roughly $21,000 per year. Medi-Cal has no monthly premiums and minimal out-of-pocket costs for most enrollees. You can apply any time of year; there’s no limited enrollment window.
California has also expanded Medi-Cal to cover residents regardless of immigration status. Currently, adults 19 and older can get full Medi-Cal coverage no matter their immigration status, and children have been eligible for years. However, starting January 1, 2026, new enrollment in full-scope Medi-Cal will no longer be available for adults without satisfactory immigration status, though those already enrolled can keep their coverage as long as they renew on time. Beginning July 1, 2027, undocumented adults ages 19 to 59 who remain enrolled will need to pay a $30 monthly premium. Pregnant individuals and their infants remain eligible for full coverage during pregnancy and for one year after delivery, regardless of immigration status.
Covered California
If your income is too high for Medi-Cal, Covered California is the state’s insurance marketplace where you can shop for plans with financial help. Federal premium tax credits are available to households earning between 100% and 400% of the federal poverty level, and California adds its own state subsidy for those between 100% and 165% of the poverty level. These subsidies can reduce your monthly premium to as little as $1 per month for lower-income enrollees.
Open enrollment runs from November 1 through January 31 each year. Outside that window, you can only enroll if you experience a qualifying life event like losing other coverage, getting married, having a baby, or moving to a new area.
Community Health Centers
If you’re currently uninsured and need care right now, community health centers (also called federally qualified health centers) are required by federal law to see patients regardless of ability to pay. These clinics use a sliding fee scale based on your income. If your household income is at or below the federal poverty level, you receive a full discount, meaning care is free or limited to a small nominal charge. Partial discounts apply for incomes up to 200% of the poverty level, with at least three graduated discount tiers in between. Services typically include primary care, dental care, mental health counseling, and preventive screenings.
California has hundreds of these centers across the state. You can find the nearest one by searching HRSA’s online tool at findahealthcenter.hrsa.gov. The centers are also required to inform patients about their discount programs in multiple languages and at accessible literacy levels, so don’t hesitate to ask at intake.
The Real Cost of Going Uninsured
The tax penalty is the most concrete and immediate consequence, but the larger financial risk is an unexpected medical event. A broken bone, an appendectomy, or a car accident can generate tens of thousands of dollars in bills. Without insurance, you’re personally responsible for the full amount, and medical debt is the leading cause of bankruptcy filings in the United States. Hospitals may offer payment plans or charity care programs, but these vary widely and don’t eliminate the underlying bill.
There’s also a subtler cost: people without insurance tend to skip preventive care and delay treatment for symptoms. Conditions that are inexpensive to manage early, like high blood pressure or diabetes, become far more dangerous and expensive when caught late. The penalty exists in part to push people toward coverage before that happens.