To close a sole proprietorship in California, you wind down the business, cancel your fictitious business name and local permits, file final federal and California tax returns, close any payroll and sales tax accounts within their specific deadlines, and keep your records for the years the IRS requires. There is no entity to formally dissolve, because legally the business and you are the same person. That makes closure simpler in one sense and riskier in another: nothing automatically shuts off, so any account you forget keeps billing or accruing penalties long after you stop working.
Wind Down Operations and Settle Debts
Before any paperwork, handle the practical side. Tell customers, clients, and vendors you’re closing so they can plan. Collect what you’re owed. Pay off vendor invoices, loan balances, and open contracts. Keep your business bank account open until every transaction clears, then close it.
Dispose of or transfer remaining assets: equipment, inventory, furniture. Sales have tax consequences covered below. Moving equipment into personal use can trigger use tax on retained inventory and depreciation recapture on your federal return. Cancel your business insurance when the work is truly done.
Cancel Your Fictitious Business Name
If you registered a Fictitious Business Name (DBA) within the past five years, California law requires a Statement of Abandonment of Use of Fictitious Business Name, filed with the same county clerk who handled your original FBN.1California Legislative Information. California Business and Professions Code 17922
The statement must include the fictitious name, your principal business address, the original filing date and file number, and your full name and mailing address. After filing, publish the abandonment in a newspaper of general circulation in that county once a week for four consecutive weeks, the same way you published the original. Then file an affidavit of publication with the county clerk.1California Legislative Information. California Business and Professions Code 17922 Expect a county filing fee and a separate newspaper charge.
Cancel Local Permits and Licenses
Beyond the FBN, you likely hold a city business tax certificate, zoning permits, health permits, or professional licenses. Contact each issuing agency to cancel or surrender them. California cities and counties will keep billing you if you don’t affirmatively close these accounts, and some charge penalties for late cancellation. Sole proprietorships are not registered with the California Secretary of State, so there is no state-level entity filing to make.
File Your Final Federal Tax Returns
Your federal closure centers on the Form 1040 you file for the year you stop operating.
Schedule C and Schedule SE
File a final Schedule C (Profit or Loss From Business) with Form 1040 for the closure year, reporting income earned and expenses incurred through your closure date.2Internal Revenue Service. Closing a Business If net self-employment earnings for the year are $400 or more, file Schedule SE to calculate self-employment tax, which covers Social Security and Medicare at a combined 15.3%.3Internal Revenue Service. Self-Employment Tax (Social Security and Medicare Taxes) Skipping Schedule SE in a final year is a common oversight that triggers penalties and interest.
Selling or Transferring Business Assets
If you sell equipment, vehicles, or other depreciable property as part of closing, report those sales on Form 4797 (Sales of Business Property).2Internal Revenue Service. Closing a Business Any gain attributable to depreciation you previously claimed gets recaptured as ordinary income rather than taxed at the lower capital gains rate.4Internal Revenue Service. Instructions for Form 4797, Sales of Business Property If a transaction includes depreciable and non-depreciable property together (land and a building, say), you must allocate the sale price between them at fair market value and report each separately.
Final Payroll and Contractor Filings
Skip this section if you had no employees and paid no contractors $600 or more during the year.
Employees
File a final Form 941 (Employer’s Quarterly Federal Tax Return) for the quarter you pay your last wages. Check the box on line 17 marking it as a final return, enter the last date you paid wages, and attach a statement with the name and address of whoever is keeping your payroll records.5Internal Revenue Service. Instructions for Form 941 File a final Form 940 (Federal Unemployment Tax) for the calendar year of those last wages.2Internal Revenue Service. Closing a Business
Give each employee a W-2 for the year of their final wages. When a business closes, the deadline for furnishing W-2s and filing with the Social Security Administration shifts to the due date of your final Form 941, not the usual January 31.6Internal Revenue Service. General Instructions for Forms W-2 and W-3 (2026) That accelerated date is easy to miss.
Independent Contractors
If you paid any contractor $600 or more for services, file Form 1099-NEC.7Internal Revenue Service. Instructions for Forms 1099-MISC and 1099-NEC The deadline is January 31 of the following year even if the business closed months earlier, and late or missing filings carry per-form penalties that climb sharply for intentional disregard.2Internal Revenue Service. Closing a Business
Deactivate Your EIN
If you have an Employer Identification Number, the IRS cannot cancel it but can deactivate it so it’s no longer tied to an active business. Send a letter with your EIN, legal business name, business address, your EIN assignment notice if you still have it, and your reason for deactivating. Mail it to the IRS in Kansas City, MO 64108 (MS 6055) or Ogden, UT 84201 (MS 6273).8Internal Revenue Service. Information on Deactivating an Employer Identification Number The IRS will not process the deactivation until all required returns are filed and all tax liabilities paid.
Close Your California State Tax Accounts
Three California agencies may have open accounts tied to your business. Each must be closed independently, and the deadlines don’t line up.
Franchise Tax Board
A sole proprietorship files no separate California business return. Report your final business income on your personal California Form 540 for the closure year. The FTB recommends writing “final” at the top of the first page and checking the applicable final return box to signal the business activity has ended.9State of California Franchise Tax Board. Closing a California Business Entity
California Department of Tax and Fee Administration
If you held a seller’s permit and collected sales tax, close the account and surrender the permit. Use the CDTFA online services portal or mail Form CDTFA-65, Notice of Closeout.10California Department of Tax and Fee Administration. Closing Out Your Account CDTFA will ask how you disposed of inventory, fixtures, and equipment, including sale prices.
File a final sales and use tax return through the closeout date, including sales of furniture, fixtures, and equipment that were part of closing. If you kept inventory for personal use that was originally purchased tax-free for resale, you owe use tax on those items.10California Department of Tax and Fee Administration. Closing Out Your Account Annual filers must file the final return by the due date of the quarterly period in which the business closed, not the usual annual date.
Employment Development Department
If you had employees, submit your final payroll tax forms and payment within 10 days of closing, regardless of the normal quarterly due dates.11Employment Development Department. Changes to Your Business The required forms are the DE 9 (Quarterly Contribution Return and Report of Wages), the DE 9C (continuation), and the DE 88 (Payroll Tax Deposit).12Employment Development Department. 2025 California Employer’s Guide That 10-day window is one of the tightest deadlines in the whole process. Close the employer payroll tax account through EDD’s e-Services for Business portal.13Employment Development Department. e-Services for Business
Bulk Sale Notice (If It Applies)
If you’re selling more than half of your inventory and equipment in a single transaction or series of related sales, and your principal business was selling inventory from stock or running a restaurant, California’s bulk sale law may apply. When it does, you must record a notice with the county recorder, publish it in a local newspaper, and deliver a copy to the county tax collector at least 12 business days before the sale. The notice identifies the buyer, describes the assets, and states the anticipated sale date. Assets with a net value under $10,000 (after liens and security interests) are exempt.
Bulk sale compliance protects the buyer from inheriting your unpaid debts. Failing to follow the rules can unwind the sale or expose both sides to creditor claims.
Terminate Any Retirement Plan
If you had a solo 401(k) or other one-participant plan, you can’t just stop contributing and walk away. The IRS treats a plan as terminated only when you establish a termination date, determine benefits and liabilities as of that date, and distribute all assets as soon as administratively feasible, generally within one year.14Internal Revenue Service. 401(k) Plan Termination Leaving assets in the plan keeps it alive in the IRS’s eyes and keeps the qualification rules running.
Termination means amending the plan document to set the date, notifying participants (which may just be you and a spouse), distributing all account balances, and filing a final Form 5500 series return. All balances become fully vested on termination regardless of any vesting schedule.14Internal Revenue Service. 401(k) Plan Termination Distributions can be rolled into an IRA to avoid immediate tax.
How Long to Keep Your Records
Closing does not mean you can shred your files. The IRS generally requires income tax records for at least three years after filing, with longer periods for specific situations: six years if you underreported income by more than 25% of gross income, seven years for a claim involving a loss from worthless securities or bad debt, and indefinitely if you never filed a return.15Internal Revenue Service. How Long Should I Keep Records?
Employment tax records have their own rule: at least four years after the tax is due or paid, whichever is later.15Internal Revenue Service. How Long Should I Keep Records? Keep records related to business property (depreciation schedules, purchase records, improvement receipts) until the statute of limitations expires for the year you disposed of that property. Even after IRS retention periods lapse, check whether your insurance company, creditors, or California agencies require longer before discarding anything.