Closing a company happens in two places, and most founders only do one of them. You file dissolution papers with the state, the state marks the company as closed, and you assume the job is done. The IRS is a separate agency with separate paperwork, and it does not learn anything from the state filing.
Your last obligation to the IRS is called the final return. Which form that is depends on one thing: how your company is taxed. Not what it is called, not which state it sits in, not whether it made any money. The word "LLC" tells you nothing here, because an LLC can be taxed in three different ways, and each way has a different final form.
So before you look for a form, settle the classification. Then read only the paragraph that applies to you.
What the rule actually requires
There are three regimes. Find yours first.
1. Taxed as a corporation. This covers any corporation, and it covers an LLC that elected to be taxed as a corporation by filing Form 8832. Under IRC § 6043(a), an entity taxed as a corporation must file Form 966, Corporate Dissolution or Liquidation, within 30 days of the day it adopts a resolution or plan to dissolve, or to liquidate all or part of its stock.
Read the deadline again, because the clock does not start where people expect. It starts on the day the plan is adopted, not on the day the state processes the dissolution and not at the end of the tax year. You attach a certified copy of the resolution or plan to the form. The IRS guidance for Form 966 does not set out a specific dollar penalty for a late form, but § 6043(a) still makes the filing a legal duty, and skipping it does not make the duty disappear.
Form 966 is not the whole job. The company also files a final corporate income tax return for its last year, with the box marked to show it is a final return.
2. Taxed as a partnership. This is the default for a multi-member LLC that never filed Form 8832. You file a final Form 1065 for the last year. Two things have to be marked:
- Item G on page 1 of Form 1065 has a "Final return" box. Check it.
- Each partner's Schedule K-1 has a "Final K-1" box. Check it on every K-1 you issue.
If you skip the boxes, the IRS has no way to know the partnership ended, and it will keep expecting a Form 1065 next year.
3. Disregarded (a single-member LLC). A single-member LLC that never elected corporate treatment is not a taxpayer of its own. It is "disregarded," which means the IRS looks straight through it to the owner. Two consequences follow.
First, a disregarded LLC does not file Form 966. Form 966 is for entities taxed as corporations, and this one is not, unless it filed Form 8832 and became one.
Second, what you file instead depends entirely on who the owner is. That is where the two lanes split, and it is the rest of this page.
🇺🇸 If the IRS counts you as a U.S. person
If you own a single-member LLC and the IRS counts you as a U.S. person, the closing is the simplest of the three.
The LLC has no separate return to end, because it never had one. Its income and expenses were already reported on your own return, normally on Schedule C or Schedule E of your Form 1040. In the year you dissolve, you report the last of that activity on your own return, and then you stop reporting it. There is no Form 966, and there is no Form 5472.
If your LLC is taxed as a partnership or as a corporation, you are not in this paragraph. You are in regime 2 or regime 3 above, and the same rules apply to you as to anyone else. A U.S.-owned corporation still owes Form 966 within 30 days of adopting the plan. A U.S.-owned multi-member LLC still owes a final Form 1065 with Item G checked and "Final K-1" marked on every K-1.
The practical risk in this lane is a different one. Because a disregarded LLC feels like it dissolves quietly, owners forget the parts that are not quiet: employment tax returns if they had employees, and state filings that keep running until the state processes the dissolution. Those are separate from the federal final return, and closing one does not close the other.
🌏 If it does not
If the IRS does not count you as a U.S. person and you own a single-member LLC, the dissolution year is the year you are most likely to get wrong.
Here is the rule. A U.S. disregarded entity that is at least 25% foreign-owned is treated as a corporation for one narrow purpose: reporting. It must file Form 5472, and because Form 5472 is an attachment rather than a standalone return, it is filed together with a pro forma Form 1120. The 1120 is not a real income tax return. It exists only to carry the 5472.
In the year you dissolve, all of that still applies, and it applies as a final return.
The reason is the part almost nobody knows. Form 5472 reports "reportable transactions" between the LLC and its foreign owner. Treas. Reg. § 1.482-1(i)(7) defines a transaction broadly enough that the acts of dissolving itself are inside it: distributing cash to the owner, transferring the LLC's assets out, and closing out contributions. Those go in Part V of Form 5472 as other transactions.
So the common belief is exactly backwards:
"The company never made any money, so there is nothing to file."
The revenue is not what triggers the form. The transactions with the owner are. Dissolving the LLC creates those transactions by definition, which means the dissolution year is a year in which you have something to report, even if the company earned zero dollars and had no customers. A dormant LLC that you shut down still owes a final Form 5472 and a final pro forma Form 1120. The Form 5472 instructions attach a penalty to a form that is not filed, or filed incomplete, and that penalty does not care whether the company was profitable.
If your LLC has more than one member and is taxed as a partnership, you are in regime 2 instead: a final Form 1065 with Item G checked and a "Final K-1" for every member.
Where the two lanes split
| 🇺🇸 If the IRS counts you as a U.S. person | 🌏 If it does not | |
|---|---|---|
| Single-member LLC, disregarded | No separate final return for the LLC. The last year of activity ends on your Form 1040 | Final Form 5472 with a pro forma Form 1120, even with zero revenue |
| Does dissolution itself have to be reported? | No separate reporting form for it | Yes. It is a reportable transaction under Treas. Reg. § 1.482-1(i)(7), reported in Part V of Form 5472 |
| Multi-member LLC, taxed as a partnership | Final Form 1065, Item G checked, "Final K-1" on each K-1 | Same |
| LLC that elected corporate tax on Form 8832 | Form 966 within 30 days of adopting the plan, plus a final corporate return | Same |
| Form 966 | Only if taxed as a corporation | Only if taxed as a corporation. A disregarded LLC does not file it |
The rows about partnerships and corporations are identical in both lanes. The split is entirely in the first two rows, and it comes from Form 5472.
Common mistakes
🇺🇸 If the IRS counts you as a U.S. person
- Filing Form 966 for a single-member LLC that never elected corporate tax. Form 966 belongs to entities taxed as corporations. Filing it for a disregarded LLC does not close anything.
- Filing the final Form 1065 but leaving Item G unchecked and the K-1s unmarked. The IRS keeps the partnership open in its records and keeps waiting for next year's return.
- Counting the day the state approves the dissolution as the start of the 30-day Form 966 clock. The clock starts on the day the plan or resolution is adopted, which is usually earlier.
🌏 If it does not
- Believing that no revenue means no filing. The dissolution year is the one year in which a reportable transaction is guaranteed, because distributing assets to the owner is itself the transaction.
- Filing the Form 5472 but not marking the return as final, so the IRS keeps expecting one every year for a company that no longer exists.
- Treating "LLC" as one thing and searching for one form. A single-member LLC, a multi-member LLC and an LLC that elected corporate tax file three different final returns. Settle the classification first.
FAQ
Does closing my LLC with the state end my IRS obligations?
No. The state filing and the federal filing are separate acts with separate agencies. The state does not tell the IRS that your company is gone. Until you file the final return that matches your tax classification, the IRS still expects returns from you.
My single-member LLC never earned anything. Do I still owe a final return?
If you are a U.S. person, there is no separate return for the LLC to file, so there is nothing extra. If you are not a U.S. person, yes. A foreign-owned single-member LLC that is disregarded owes a final Form 5472 with a pro forma Form 1120 for the year it dissolves, because the dissolution itself creates transactions with the owner that Treas. Reg. § 1.482-1(i)(7) treats as reportable.
Does my LLC file Form 966?
Only if it is taxed as a corporation, which means only if it filed Form 8832 to elect corporate treatment. IRC § 6043(a) applies to entities taxed as corporations. A default single-member LLC is disregarded and is not one.
When exactly is Form 966 due?
Within 30 days of the date the entity adopts the resolution or plan to dissolve, or to liquidate all or part of its stock. You attach a certified copy of that resolution or plan. The deadline runs from the adoption date, not from the date the state records the dissolution.
What do I have to mark on a final Form 1065?
Two things. The "Final return" box in Item G on page 1, and the "Final K-1" box on every Schedule K-1 you give to a partner. Both, not one.
I am a non-resident and I want to abandon the LLC instead of dissolving it. Does that avoid the final Form 5472?
Walking away does not end the filing duty, and it usually makes things worse. The LLC continues to exist in the state's records until it is formally dissolved or the state dissolves it for you, and the federal reporting duty follows the entity, not your interest in it. Dissolve it properly and file the final return.
Is the final return the same as the state annual report?
No. They go to different places and answer different questions. The annual report is a state filing that keeps the company in good standing. The final return is a federal tax filing that tells the IRS the company has ended. Filing one has no effect on the other.