To close an S corp, you take a formal vote to dissolve, adopt a plan of liquidation, and then work through a set sequence of federal and state filings while paying off creditors and distributing what’s left to shareholders. The order matters, several of the deadlines are short, and shareholders can end up personally liable if payroll taxes or state obligations are left unpaid. Expect the whole process to take a few months from the vote to the final piece of paper.
Vote to Dissolve and Adopt a Plan of Liquidation
Everything starts with a formal vote. Your bylaws or articles of incorporation say who has to approve dissolution (the board, the shareholders, or both) and what majority is required. Record the vote in official corporate meeting minutes. If the vote isn’t properly documented, you may hit friction later when the state asks for proof that the dissolution was authorized.
Once the vote passes, adopt a written plan of liquidation. For a small S corp it doesn’t need to be elaborate, but it should fix the date the corporation stops doing business, how assets will be sold or distributed, how debts will be paid, and a timeline for the final distribution to shareholders. Get the adoption date right, because it starts the 30-day clock on Form 966 and gets referenced by later IRS filings.
File Form 966 Within 30 Days
Within 30 days of adopting the resolution or plan to dissolve, file Form 966, Corporate Dissolution or Liquidation, with the IRS.1Office of the Law Revision Counsel. 26 U.S. Code 6043 – Liquidating, Etc., Transactions The form asks for the corporation’s name and EIN, when and where it was incorporated, the date the plan was adopted, and the number of outstanding shares. Attach a certified copy of the dissolution resolution or plan.2Internal Revenue Service. Form 966, Corporate Dissolution or Liquidation If the plan is amended later, file another Form 966 within 30 days of the amendment.
File the Final 1120-S and Schedule K-1s
The corporation files a final Form 1120-S covering the period from the start of its last tax year through the dissolution date. Check the “Final return” box in Item H so the IRS knows no more returns are coming.3Internal Revenue Service. Instructions for Form 1120-S (2025) – Section: Item H. Final Return Because a wind-down rarely lands on December 31, this is almost always a short-year return. A corporation that dissolves mid-year must file by the 15th day of the third month after the dissolution date.4Internal Revenue Service. 2025 Instructions for Form 1120-S – Section: When To File Dissolve on August 15 and the return is due November 15.
Report all income, deductions, and gains or losses from the final year, including any gains recognized when the corporation sells or distributes assets during liquidation. Issue each person who was a shareholder at any point during the final year a Schedule K-1, and check the “Final K-1” box on every one.5Internal Revenue Service. 2025 Instructions for Form 1120-S – Section: Item H. Final Return Shareholders need those K-1s to finish their personal returns, so send them promptly.
Close Out Employment Taxes
If you had employees, the final payroll has its own set of filings. Pay all final wages, bonuses, and accrued vacation. Make final federal deposits for income tax withholding, Social Security, and Medicare. If you fail to withhold or deposit those employment taxes, the IRS can impose the Trust Fund Recovery Penalty, which makes responsible individuals personally liable for the unpaid amount.6Internal Revenue Service. Closing a Business – Section: Take Care of Your Employees
The forms:
- Form 941 (or 944) for the quarter in which you paid final wages. Check the box on line 17 indicating the business has closed, enter the date of the last wage payment, and attach a statement listing who is keeping the payroll records and where.7Internal Revenue Service. Instructions for Form 941 (Rev. March 2026) – Section: If Your Business Has Closed
- Form 940 for the calendar year in which final wages were paid. Check box “d” in the Type of Return section to mark it as final.6Internal Revenue Service. Closing a Business – Section: Take Care of Your Employees
- Final W-2s to all employees, filed with the Social Security Administration.
Contact your state labor department to close the state unemployment insurance account and file any final returns.
WARN Act Notice for Larger Employers
Employers with 100 or more employees face an additional federal requirement. The Worker Adjustment and Retraining Notification Act requires at least 60 calendar days’ written notice to affected employees before a plant closing or mass layoff.8eCFR. 20 CFR Part 639 – Worker Adjustment and Retraining Notification Exceptions exist for temporary facilities, projects with a defined end date, and certain unforeseeable business circumstances, but the employer has to prove the exception applies. A WARN violation can mean back pay and benefits liability for each day of the violation, up to 60 days.
COBRA
If the corporation provided group health insurance and had 20 or more workers, COBRA rules apply. Termination of employment is a qualifying event, and the employer must notify the plan administrator within 30 days. If the employer is also the plan administrator, COBRA election notices must go out within 44 days of the qualifying event.9CMS. COBRA Continuation Coverage Questions and Answers The practical wrinkle in a full closure: if the group health plan itself is being wound up along with the business, COBRA obligations end because there’s no plan through which to offer coverage. If the corporation is part of a controlled group that keeps a plan, COBRA rights may survive.
Terminate Any Retirement Plan
If the S corp sponsored a 401(k), profit-sharing plan, or other qualified retirement plan, you can’t simply stop contributing and walk away. The plan has to be formally terminated to protect its tax-qualified status.
The core steps: amend the plan to set a termination date, fully vest all participants with an account balance as of that date, and distribute all plan assets as soon as administratively feasible. The IRS generally expects that within 12 months of termination. Participants must get rollover notices so they can move balances into IRAs or other qualified plans without triggering tax.10Internal Revenue Service. Terminating a Retirement Plan File a final Form 5500 for the plan. A plan that still holds assets after the termination date is treated as ongoing and stays subject to all qualification rules, annual reporting, and fiduciary obligations. Leaving a retirement plan in limbo is one of the more expensive mistakes a dissolving S corp can make.
Shareholder Tax Consequences
Liquidating Distributions
Shareholders don’t pocket liquidating distributions tax-free. Amounts received in a complete liquidation are treated as payment in exchange for the shareholder’s stock.11Office of the Law Revision Counsel. 26 U.S. Code 331 – Gain or Loss to Shareholder in Corporate Liquidations Each shareholder compares what they received (cash plus the fair market value of any property distributed) against their adjusted stock basis. Excess over basis is capital gain; a shortfall is a capital loss. If the stock was held more than one year, the gain is long-term.12Internal Revenue Service. S Corporation Stock and Debt Basis Debt basis doesn’t factor into whether a distribution is taxable. Get the basis calculation right, because the final year’s pass-through income and losses on the K-1 adjust basis before the liquidating distribution is measured against it.
Corporate-Level Gain on Asset Sales and Distributions
When the corporation distributes appreciated property or sells assets during the liquidation, it recognizes gain or loss as if the property were sold at fair market value.13Office of the Law Revision Counsel. 26 U.S. Code 336 – Gain or Loss Recognized on Property Distributed in Complete Liquidation That gain flows through to shareholders on their K-1s, which can leave a shareholder owing tax on gain from property they’ve received but not yet turned into cash. Plan the timing with that in mind.
Built-In Gains Tax for Former C Corporations
If the S corporation used to be a C corporation, a separate corporate-level tax may hit. The built-in gains tax applies when an S corp disposes of assets it held on the date the S election first took effect, provided the disposition happens within five years of that date. The tax uses the highest corporate rate applied to the net recognized built-in gain for the year. It doesn’t apply if the corporation was always an S corp, the five-year recognition period has run, or there was no net unrealized built-in gain on the effective date of the S election.14Office of the Law Revision Counsel. 26 U.S. Code 1374 – Tax Imposed on Certain Built-in Gains If you converted from a C corp within the last five years and still hold appreciated assets, the timing of dissolution directly affects the tax bill.
File State Dissolution Paperwork
Federal filings don’t end the corporation’s legal existence. That takes filing Articles of Dissolution or a Certificate of Dissolution with the Secretary of State (or equivalent agency) in the state where the corporation was formed. Filing fees are usually modest, generally from under $10 to around $60.
States typically want the legal name, date of incorporation, and effective date of dissolution. Many also require a tax clearance certificate from the state’s department of revenue confirming all state taxes are paid before they’ll accept the dissolution filing. Clearance times run from same-day in states with automated systems to several months where the review is manual. Build the lead time into your schedule.
If the S corporation was registered to do business in other states, file withdrawal paperwork in each of those states too. Skip that and the corporation may stay on the hook for franchise taxes, annual reports, and filing fees in the foreign state indefinitely.
Notifying Creditors
Most states have a process for formally notifying creditors of the dissolution, either by direct mail to known creditors or by publishing a notice in a local newspaper. Following the process properly can bar future claims from creditors who fail to respond within the deadline set by state law, typically six months from the date of notice. Skip it and creditors may pursue claims against shareholders who received liquidating distributions after the corporation is gone.
Wind Down Operations
Pay Debts, Then Distribute What’s Left
Creditors first. Before any money goes to shareholders, the corporation must pay or make reasonable provision for all its debts and liabilities. Only after that do remaining assets go to shareholders in proportion to stock ownership. If you’re distributing property rather than cash, the fair market value on the distribution date is what matters for tax on both the corporate and shareholder side. Get appraisals for any non-cash assets of significant value.
Cancel Licenses, Permits, and the EIN
Cancel business licenses, permits, and registrations at every level of government, including state and local sales tax permits, professional licenses, and industry-specific permits. To close the federal EIN account, send a letter to the IRS at Cincinnati, OH 45999 with the corporation’s legal name, EIN, business address, and reason for closing the account. Include a copy of the EIN assignment notice if you have it.15Internal Revenue Service. Closing a Business – Section: Cancel Your EIN and Close Your IRS Business Account The IRS won’t close the account until all required returns have been filed and all taxes are paid.
Unclaimed Property
During wind-down the corporation may hold outstanding checks, unreturned customer deposits, or other property owed to people it can’t locate. Every state has unclaimed property laws requiring businesses to report and remit these assets. Some states let dissolving businesses submit unclaimed property on an accelerated timeline without waiting for the normal dormancy periods. Check with the state controller or treasurer’s office before the final distribution.
Keep the Records
Dissolution doesn’t end record retention. The IRS sets minimum periods by record type:
- General tax records: at least three years after filing the return, longer in some situations.16Internal Revenue Service. How Long Should I Keep Records?
- Records involving unreported income exceeding 25% of gross income: six years.
- Worthless securities or bad debt claims: seven years.
- Employment tax records: at least four years after the tax is due or paid, whichever is later.17Internal Revenue Service. Publication 583, Starting a Business and Keeping Records – Section: How Long To Keep Records
- Asset and property records: until the period of limitations expires for the year the property was disposed of.
Keep corporate minutes, formation documents, and financial statements permanently, or at least as long as any potential legal claim could arise. Insurance companies and creditors may want longer retention than the IRS does.16Internal Revenue Service. How Long Should I Keep Records? Designate someone to hold the records after dissolution, and put that person’s name and address on the final Form 941.