A single-member LLC California tax return actually means two filings in two systems. Federally, the IRS treats your LLC as if it doesn’t exist and you report its income on your personal Form 1040 through Schedule C. In California, the Franchise Tax Board treats the LLC as its own entity, requires Form 568 every year, and charges at least $800 annually whether the business earned money or not. Missing either side triggers penalties that stack quickly.
How the IRS Treats Your Single-Member LLC
The IRS classifies a single-member LLC as a “disregarded entity.”1Internal Revenue Service. Single Member Limited Liability Companies You don’t file a separate federal return for the LLC. Instead, the business’s income, expenses, and deductions land on your personal Form 1040 through Schedule C. The net profit or loss flows into your adjusted gross income and gets taxed at your ordinary rate alongside any wages or other income.
Schedule C is where the real work happens. You report gross receipts, subtract cost of goods sold if applicable, then deduct operating expenses like rent, supplies, insurance, and advertising. The bottom line drives both your income tax and your self-employment tax.
Self-employment tax is the part that catches new owners off guard. You pay the full 15.3%: 12.4% for Social Security and 2.9% for Medicare. For 2026, the Social Security portion applies only to the first $184,500 of net self-employment income.2Social Security Administration. Contribution and Benefit Base Medicare has no cap, and earnings above $200,000 (single) or $250,000 (married filing jointly) trigger an additional 0.9% Medicare surtax. You get to deduct half of the self-employment tax as an adjustment to income on Schedule 1, which lowers your income tax even if you take the standard deduction.
California’s $800 Annual Franchise Tax
California charges every LLC an $800 annual franchise tax simply for being registered in the state. It doesn’t matter whether the LLC earned a dollar or sat dormant all year. The tax is owed for every year the LLC remains on file with the Secretary of State, beginning with the first taxable year.3Justia Law. California Revenue and Taxation Code 17941-17947
Payment is due by the 15th day of the fourth month of your taxable year. For calendar-year LLCs, that’s April 15. You submit it on Form FTB 3522 or pay electronically through the FTB’s Web Pay portal.4Franchise Tax Board. Annual LLC Tax Voucher Form FTB 3522 Online payment skips the paper voucher.
The $800 keeps accruing every year until you formally cancel the LLC with the Secretary of State. Stopping business activity or letting the LLC go inactive doesn’t stop the clock. Owners who walk away from a dormant LLC sometimes discover years of unpaid $800 charges plus penalties and interest when they finally try to clean things up.
California LLC Fee Based on Income
On top of the $800 tax, California imposes a separate fee tied to the LLC’s total income derived from or attributable to California.5California Legislative Information. California Revenue and Taxation Code 17942 The fee only applies when that income reaches $250,000 or more. “Total income” here means gross income plus cost of goods sold, not net profit. An LLC with $400,000 in gross receipts and $350,000 in expenses still owes the fee even though its profit is only $50,000.
The tiers:
- $900 for total California income of $250,000 to $499,999
- $2,500 for total California income of $500,000 to $999,999
- $6,000 for total California income of $1,000,000 to $4,999,999
- $11,790 for total California income of $5,000,000 or more
You estimate and prepay the fee by the 15th day of the sixth month of your taxable year (June 15 for calendar-year filers) using Form FTB 3536.6Franchise Tax Board. 2025 Instructions for Form FTB 3536 Estimated Fee for LLCs If your estimate falls short of what you actually owe, the FTB charges a penalty equal to 10% of the underpayment. You can avoid that penalty if your estimated payment at least matches the prior year’s fee.7Franchise Tax Board. 2024 Form 568 Booklet – Limited Liability Company Return of Income Any remaining balance is due when you file Form 568.
Filing Form 568 With the Franchise Tax Board
Even though the IRS ignores your single-member LLC, California does not. The FTB requires every SMLLC to file Form 568, Limited Liability Company Return of Income, every year regardless of income level.8Franchise Tax Board. Single Member LLC An LLC with zero revenue still files. The only narrow exception is an LLC whose entire taxable year was 15 days or less and that conducted no business during that period.9Franchise Tax Board. 2025 Form 568 Booklet – Limited Liability Company Return of Income
For a calendar-year SMLLC owned by an individual, the return is due on the 15th day of the fourth month after the close of the taxable year, or April 15.10Franchise Tax Board. Due Dates – Business California grants an automatic six-month extension to file, pushing the paperwork deadline to October 15. The extension covers the paperwork only. It does not extend the deadline for paying the $800 annual tax or the LLC fee.9Franchise Tax Board. 2025 Form 568 Booklet – Limited Liability Company Return of Income Those payments are still due on their original dates even if you haven’t filed yet.
Form 568 reports the LLC’s income, deductions, and owner information, and you use it to calculate the LLC fee on Side 1. You can file electronically through compatible tax software or mail the return. If the SMLLC is owned by a partnership or S corporation rather than an individual, the return is due by the 15th day of the third month instead (March 15 for calendar-year filers).8Franchise Tax Board. Single Member LLC
Penalties and Suspension
California stacks penalties in ways that get expensive fast, especially for owners who assume the automatic extension covers everything.
The late filing penalty is 5% of the unpaid tax and fee amount for each month or partial month the return is overdue, up to 25%.7Franchise Tax Board. 2024 Form 568 Booklet – Limited Liability Company Return of Income The late payment penalty starts at 5% and adds 0.5% each month, also topping out at 25%. They’re calculated separately, so you can owe both at once. Interest runs on top of everything from the date the FTB mails notice.
Ignore the obligations entirely and the FTB can suspend or forfeit your LLC. A suspended LLC loses the legal right to conduct business in California, enter contracts, or defend itself in court. Reviving it requires paying all outstanding balances, filing every delinquent return, and submitting an Application for Certificate of Revivor.11Franchise Tax Board. Suspended or Forfeited Businesses
Federal Quarterly Estimated Payments
Because no employer withholds taxes from your LLC profits, you’ll likely owe quarterly estimated payments to the IRS. The requirement kicks in if you expect to owe at least $1,000 in federal tax for the year after subtracting withholding and refundable credits.12Internal Revenue Service. Estimated Tax for Individuals Payments go through Form 1040-ES, either via IRS Direct Pay or by mailing vouchers with a check.
The four 2026 deadlines:
- April 15, 2026, covering income earned January through March
- June 15, 2026, covering April and May
- September 15, 2026, covering June through August
- January 15, 2027, covering September through December
To dodge underpayment penalties, pay either 90% of your current-year tax or 100% of last year’s tax (110% if your prior-year adjusted gross income exceeded $150,000).12Internal Revenue Service. Estimated Tax for Individuals The prior-year method is the safer bet when income fluctuates, since it’s based on a number you already know.
Deductions Worth Knowing About
Qualified Business Income Deduction
The Section 199A deduction lets you exclude up to 20% of your qualified business income from federal tax. It was made permanent in 2025 and applies to your 2026 return. It’s calculated on your personal return, not on Schedule C, and it’s available whether you itemize or take the standard deduction. In specified service fields like law, medicine, consulting, and financial services, the deduction phases out at higher incomes. For 2026, the phase-out starts at $203,000 for single filers and $406,000 for married filing jointly.
Self-Employed Health Insurance
If you pay your own health insurance and aren’t eligible for coverage through a spouse’s employer plan, you can deduct 100% of premiums for yourself, your spouse, and dependents as an adjustment to income on Schedule 1. That includes medical, dental, and qualifying long-term care insurance, plus all parts of Medicare. It’s claimed on your personal return, not on Schedule C, and it’s available whether or not you itemize.
Home Office and Vehicle
Home office expenses can be deducted using either the simplified method ($5 per square foot, up to 300 square feet) or actual expenses tracked on Form 8829.13Internal Revenue Service. Instructions for Schedule C (Form 1040) Vehicle expenses can be claimed using either the standard mileage rate or actual operating costs, not both. If you want the option to use the standard mileage rate in later years, pick it in the first year you use the vehicle for business.
If Your LLC Has Employees
Disregarded entity treatment only applies to income taxes. For employment tax purposes, the IRS treats your single-member LLC as a separate entity. If you hire employees, the LLC itself must obtain its own EIN and use that EIN to report and pay employment taxes, not your personal Social Security number.1Internal Revenue Service. Single Member Limited Liability Companies The LLC files Forms 941 or 944 and handles withholding under its own name and EIN. If you have no employees and don’t file excise tax returns, a separate EIN isn’t federally required, though banks and vendors often ask for one anyway.
Closing the LLC Properly
If you decide to close, tax obligations don’t end until you complete a specific sequence. File a final Form 568 with the FTB, pay the $800 for the year of the final return, and file a Certificate of Cancellation (Form LLC-4/7) with the California Secretary of State. Domestic LLCs also need to file a Certificate of Dissolution (Form LLC-3) before canceling.9Franchise Tax Board. 2025 Form 568 Booklet – Limited Liability Company Return of Income
Timing matters. Filing the cancellation with the Secretary of State after the taxable year ends can leave you owing another $800 for the next year. To avoid the extra charge, the LLC must file a timely final return (including extensions), conduct no further business after the final taxable year, and file the cancellation documents within 12 months of that timely filed final return. LLCs open for less than 12 months that never conducted business and have no debts may qualify for a simplified short-form cancellation using Form LLC-4/8.
Calendar for a Calendar-Year SMLLC
- April 15: $800 annual franchise tax due to the FTB (Form FTB 3522 or Web Pay); federal Q1 estimated tax payment; Form 568 due (or file by October 15 under the automatic extension); federal Form 1040 due (or file by October 15 under its own extension).
- June 15: Estimated LLC fee due to the FTB if you expect to owe it (Form FTB 3536); federal Q2 estimated tax payment.
- September 15: Federal Q3 estimated tax payment.
- October 15: Extended filing deadline for Form 568 and Form 1040.
- January 15 (following year): Federal Q4 estimated tax payment (waived if you file your return and pay in full by January 31).
Keep income documentation, expense receipts, bank statements, and mileage logs for at least three years from the date you file. Employment tax records should be kept for four years.14Internal Revenue Service. Taking Care of Business: Recordkeeping for Small Businesses The IRS can audit further back if it suspects substantial underreporting, so holding records for six or seven years is a reasonable precaution when storage isn’t an issue.