If you had no income last year, you generally do not need to file California state taxes. The Franchise Tax Board only requires a return when your income crosses set thresholds tied to your filing status, age, and number of dependents, and someone with zero earnings sits well below every one of them. That said, a handful of specific situations can still create a filing obligation, and in some cases filing voluntarily is the only way to collect money the state already owes you.
The FTB Income Thresholds
California applies two tests: one based on gross income and one based on adjusted gross income (AGI). If either number exceeds the threshold for your situation, you have to file.1Franchise Tax Board. Residents – Filing Requirements
For a single filer under 65 with no dependents, the 2025 gross income threshold is $22,941 and the AGI threshold is $18,353. A married couple filing jointly, both under 65 with no dependents, must file above $45,887 in gross income or $36,711 in AGI. Thresholds rise with age and each additional dependent. Zero income clears all of them.
When You Still Have to File
A few circumstances create a filing obligation regardless of how little you earned.
You Owe Use Tax on Out-of-State Purchases
If you bought goods from an out-of-state or online retailer that didn’t charge California sales tax, you probably owe use tax on items you use, store, or consume in California. Reporting and paying it on your state income tax return is the standard route.2California Department of Tax and Fee Administration. California Use Tax, Good for You. Good for California
You Received Advance Premium Tax Credit Payments
If you or a family member got advance payments of the health insurance premium tax credit through Covered California, you have to file a federal return to reconcile them on Form 8962, even if you otherwise wouldn’t need to. If the advance payments exceeded what you actually qualified for, you’ll owe the difference.3Internal Revenue Service. Premium Tax Credit: Claiming the Credit and Reconciling Advance Credit Payments California requires a state return whenever you’re required to file a federal one, so this federal duty can drag a state return along with it.4Franchise Tax Board. Do You Need to File?
You Had HSA Activity
California doesn’t conform to the federal rules for health savings accounts. Contributions you deducted federally have to be added back as California income, and distributions used for non-medical expenses are taxable in the state.5Franchise Tax Board. 2025 Form 540 Booklet These adjustments can push someone who looks like they have no California income above the filing threshold.
You’re a Part-Year Resident or Nonresident With California Income
If you moved into or out of California during the year, or you live elsewhere but earned money from a California source, the FTB generally wants a return. Rental income from a California property is one common trigger, and it doesn’t take much of it.4Franchise Tax Board. Do You Need to File?
Why You Might Want to File Anyway
For many low- or no-income Californians, the real question isn’t whether filing is required but whether skipping it leaves money behind. Often it does.
Refund of Withheld Tax
If you worked at all, your employer likely withheld state income tax from your paychecks. Filing a return is the only way to get that money back.4Franchise Tax Board. Do You Need to File?
California Earned Income Tax Credit
The CalEITC is refundable, meaning it can pay you money even when you owe zero state tax. For 2025, you qualify with earned income between $1 and $32,900. The credit runs from $302 with no qualifying children up to $3,756 with three or more.6Franchise Tax Board. Eligibility and Credit Information You have to file and claim it to receive it. Note the floor: with literally zero earned income, CalEITC is off the table.
Young Child and Foster Youth Tax Credits
Two more refundable credits stack on top of CalEITC. The Young Child Tax Credit pays up to $1,189 if you qualify for CalEITC and have a child under six. The Foster Youth Tax Credit offers the same amount to current and former foster youth ages 18 to 25 who qualify for CalEITC and were in California foster care at age 13 or older.6Franchise Tax Board. Eligibility and Credit Information
Filing your California return typically means filing federally too, which opens the door to the federal Earned Income Tax Credit and other refundable credits. If you qualify for CalEITC, you almost certainly qualify for the federal version.
What Happens if You Skip a Return You Should Have Filed
California’s late filing penalty is 5% of unpaid tax per month, capped at 25%. If you owe nothing, the percentage-based penalty is zero, so a missed filing on a zero-tax year carries no standard penalty. When there’s a balance due of $540 or less, a minimum penalty of $135 or 100% of the tax owed, whichever is less, applies instead.7Franchise Tax Board. Common Penalties and Fees
The bigger risk is the FTB deciding you had unreported income. It can send a Request for Tax Return and then a formal Demand for Tax Return. Ignoring the demand triggers a 25% penalty on whatever amount the FTB assesses, and interest runs the whole time.7Franchise Tax Board. Common Penalties and Fees If you actually had no income, responding to any FTB letter promptly keeps the situation from escalating.
Deadlines
Returns for the 2025 tax year are due April 15, 2026. California automatically extends the filing deadline to October 15, 2026 with no application, but any tax owed is still due April 15.8Franchise Tax Board. Due Dates: Personal If you’re filing only to claim a refund, the October date gives you extra time with no penalty because you don’t owe anything. The federal deadline is the same April 15, 2026 date.9Internal Revenue Service. IRS Opens Filing Season
How to File
The FTB’s free CalFile tool lets you e-file your state return directly. Your AGI has to be above $0 to use it, and you must claim the standard deduction rather than itemize. CalFile handles W-2 wages, interest, dividends, Social Security benefits, and unemployment.10Franchise Tax Board. CalFile Qualifications 2025 You also need to have filed a California return in at least one of the previous five years to register.11Franchise Tax Board. CalFile
The IRS Free File program offers free guided software for taxpayers with AGI of $89,000 or less.12Internal Revenue Service. Free Options and Resources for Preparing and Filing Taxes in 2026 Many commercial packages file federal and California returns together, which is often the simplest path if CalFile can’t handle your situation.
If you’d rather file on paper, Form 540 2EZ works for straightforward returns and Form 540 covers more complex ones. Both are available from the FTB website.13Franchise Tax Board. Forms and Publications