IRS Form 966, explained

What is IRS Form 966?

Form 966, titled Corporate Dissolution or Liquidationis a short informational filing that a corporation sends to the IRS after it has formally decided to shut down. It reports one core fact: that the corporation adopted a resolution or plan to dissolve or liquidate, and the date it did so. It also captures identifying details, the corporation's name, its EIN, the service center where it files, and the number of shares outstanding at the time of the plan.

It is important to understand what the form is not. It is not a tax return. It does not calculate any tax, it does not report income, and it does not by itself end the corporation's obligations. Think of it as a notice: it tells the IRS to expect a wind-down and a final return, so the agency's records line up with the decision your board and shareholders already made. The heavy lifting of actually closing the company happens in the steps around it.

Who has to file Form 966?

The dividing line is tax status, not state entity type. Any entity taxed as a corporation for federal purposes files Form 966 when it dissolves or liquidates. That includes:

• C corporationsthe standard case the form was written for.
• S corporationsan S election doesn't remove the requirement; the form still applies.
• LLCs that elected corporate taxationan LLC that filed Form 8832 or 2553 to be taxed as a C or S corporation files Form 966 too, even though its state paperwork is an LLC dissolution.

Who does not file it: an ordinary multi-member LLC taxed as a partnership, and a single-member LLC treated as a disregarded entity. Those close through their own final returns without Form 966. If you're dissolving an LLC and unsure which bucket you're in, the distinction is exactly the sort of thing worth confirming before you file, start with how to dissolve an LLC and the note on final returns.

What is the 30-day rule?

Form 966 is due within 30 days after the corporation adopts the resolution or plan to dissolve or liquidate. The trigger is the internal decision, the dated board and shareholder resolution, not the day your certificate of dissolution is accepted by the state. Those two dates are often weeks apart, and people who wait for the state confirmation before starting the federal paperwork can blow past the window without realizing the clock started earlier.

If the corporation later amends or supplements its plan of dissolution, another Form 966 is generally filed within 30 days of that change. The practical takeaway: fix the date of your dissolution resolution clearly in your records, because it is the anchor for the deadline, the form, and the sequencing of your corporate dissolution as a whole.

What information goes on the form?

The form is short, but each field has to match your records exactly or the filing gets harder to reconcile later. You'll provide:

• The corporation's complete legal name and EIN, as they appear on the IRS's records.
• The type of return the corporation files and the service center it files with.
• The date the resolution or plan to dissolve was adopted, the 30-day anchor.
• A description of the plan, and the number of shares outstanding at the time of adoption.
• A certified copy of the resolution or plan of dissolution, attached as the instructions direct.

What does filing Form 966 actually do?

Filing it puts the dissolution on the IRS's radar and completes one required piece of the corporate wind-down. What it does not do is the part people most often assume: it does not file your final return, and it does not close the IRS business account behind your EIN. Those remain separate steps, and the account stays open until you handle them.

This is the same trap that catches people closing any entity that ever had an EIN, filing one piece of paperwork and assuming the rest follows. It doesn't. To actually stop the IRS from expecting returns, you file the final corporate return marked final and then send a written request to close the IRS business account. Form 966 is the announcement; those two steps are the close.

How does Form 966 fit with your final returns?

Sequence it alongside the rest of the federal wind-down rather than treating it as a standalone errand. A clean order for a dissolving corporation looks like this: adopt the dissolution resolution; file Form 966 within 30 days; wind up the business and settle liabilities; file the final corporate income tax return (Form 1120 or 1120-S) with the “final return” box checked; file any final employment and excise returns; then request closure of the IRS business account once every final return is in.

Each piece signals something different to the IRS, and the “final” markers on the returns are what tell the system to stop expecting the next year's filing. If your company had payroll, the final employment side has its own steps, see final payroll tax when you close. And the whole federal picture, from Form 966 through the last return, is laid out on the final tax return page.

Common Form 966 mistakes

The errors we see most often are procedural, not technical:

• Starting the clock from the state filing. The 30 days run from the internal resolution date, which is usually earlier.
• Assuming it closes the account. It doesn't; the final return and the account-closure letter still have to happen.
• Filing it for the wrong entity. A partnership-taxed LLC doesn't file it; a corporate-taxed LLC does.
• Mismatched name or EIN. Small inconsistencies with IRS records slow everything that follows.
• Not keeping a copy. There's no acknowledgment email, so your dated copy is your proof it was filed on time.

Rather have the whole corporate closure handled?

Form 966 is one piece of a corporate dissolution, and it's the piece most tangled up with the other federal steps. When we handle a Complete Closure, we prepare Form 966 within the deadline, keep it in sequence with the final returns, and close the IRS business account once everything is filed, so nothing is left half-done. State filing fees are passed through at cost, and a specialist is on WhatsApp 24/7 if you want to talk through whether your entity even needs the form. If you started with the $99 State Filing and it turns out you need the corporate side too, the difference is fully credited.

This page explains IRS procedure in general terms and isn't tax advice. Confirm the current filing address and any details specific to your corporation with the IRS or your tax professional before you file.