Form 8804 Explained for US LLCs With Foreign Partners

Form 8804 is the annual U.S. tax form used by a partnership to report its Section 1446 withholding tax liability when it has effectively connected taxable income (ECTI) allocable to foreign partners. For a U.S. multi-member LLC taxed as a partnership, Form 8804 can become an important part of the annual compliance process when one or more members are non-U.S. persons.

The form is often confused with Form 1065, but they serve different purposes. Form 1065 reports the partnership's income and tax information; Form 8804 reports the partnership's Section 1446 withholding liability. Form 8804 also serves as a transmittal form for the applicable Forms 8805 issued to foreign partners.

What Is Form 8804?

Form 8804 is formally called the Annual Return for Partnership Withholding Tax (Section 1446). It is used to report the partnership's total Section 1446 withholding liability for the tax year and to reconcile that liability with withholding payments already made during the year. Any remaining amount due is generally paid with the form. For a U.S. LLC, the form generally becomes relevant when:

• The LLC is taxed as a partnership.
• It has one or more foreign partners.
• The partnership has ECTI allocable to those foreign partners.
• Section 1446 withholding applies. Foreign ownership alone does not automatically mean Form 8804 is required.

Why Does Section 1446 Matter?

Section 1446 is designed to collect U.S. tax from foreign partners on their share of partnership income that is effectively connected with a U.S. trade or business. For example, imagine two non-U.S. residents own a U.S. LLC equally. The LLC operates a consulting business in the United States and generates ECTI.

Because the income is allocable to foreign partners, the partnership may have to make Section 1446 withholding payments during the year and report its annual liability on Form 8804.

The important point is that the withholding obligation is based on the relevant ECTI allocated to foreign partners—not simply on cash distributions. A partnership may therefore have a withholding obligation even if it retains its profits to finance growth rather than distributing them to the members.

Is Form 8804 the Same as Form 1065?

No. The two forms address different aspects of partnership taxation.

The IRS specifically requires Form 8804 to be filed separately from Form 1065.

Who Has to File Form 8804?

A partnership generally files Form 8804 when it has effectively connected gross income allocable to foreign partners under the applicable Section 1446 rules. If it has ECTI allocable to foreign partners, it also has a Section 1446 withholding obligation. This distinction is important because gross income and taxable income are not the same thing.

The IRS instructions explain that ECTI allocable to a foreign partner generally takes into account the partner's distributive share of effectively connected gross income and relevant deductions, along with applicable adjustments and exemptions. Consequently, a foreign-owned LLC should not decide whether Form 8804 applies merely by looking at its bank deposits or gross sales.

What Information Goes Into Form 8804?

Form 8804 essentially brings together the partnership's Section 1446 withholding calculation for the year. The partnership needs to determine matters such as:

1. Its effectively connected income.
2. The amount allocable to foreign partners.
3. The applicable withholding rate.
4. Section 1446 payments already made during the year.
5. Any remaining balance due.
6. Whether applicable penalty calculations are required.

For 2026, the general Section 1446 applicable percentage is 37% for non-corporate foreign partners and 21% for corporate foreign partners, although the rules can permit different treatment for certain types of income and qualifying circumstances. These percentages are withholding rates, not necessarily the foreign partner's final U.S. tax liability.

Form 8804 and Form 8805 Work Together

Form 8804 does not stand alone. The partnership generally prepares Form 8805, Foreign Partner's Information Statement of Section 1446 Withholding Tax, for each applicable foreign partner.

Form 8805 shows the partner's allocable ECTI and the Section 1446 withholding attributable to that partner. The partnership provides the form to the foreign partner and attaches the applicable Forms 8805 to Form 8804.

Example

Suppose a U.S. LLC has two foreign individual members. Each owns 50% of the partnership. The LLC has ECTI allocable to both members and makes Section 1446 withholding payments during the year. At year-end, the compliance process may look like this:

Form 1065 → reports the partnership's overall tax information. Two Schedule K-1s → report each member's share. Two Forms 8805 → report each foreign member's ECTI and withholding information.

Form 8804 → reports the partnership's total Section 1446 withholding liability and transmits the Forms 8805. This structure allows the foreign members to reconcile the partnership withholding with their own U.S. tax reporting.

When Is Form 8804 Due?

Under the 2026 IRS instructions, Forms 8804 and 8805 are generally due by the 15th day of the third month after the close of the partnership's tax year. A special later deadline can apply to partnerships that keep their books and records outside the United States and Puerto Rico.

For a calendar-year partnership, the standard deadline is generally March 15, subject to weekend and holiday rules. An eligible partnership can request additional time by filing Form 7004. However, an extension to file does not extend the time for paying the tax.

Section 1446 Payments Happen During the Year

One of the biggest mistakes is waiting until the Form 8804 deadline to think about withholding. The partnership generally has to make Section 1446 installment payments during the tax year. The IRS generally requires payments by the 15th day of the fourth, sixth, ninth, and twelfth months of the partnership's tax year.

Partnerships can use Form 8804-W to calculate estimated Section 1446 payments. The IRS states that estimated installment payments are generally required when the aggregate Section 1446 tax on ECTI allocable to foreign partners will be $500 or more. This makes cash-flow planning particularly important for foreign-owned startups that reinvest profits instead of distributing them.

Can Form 8804 Withholding Be Reduced?

Potentially. A foreign partner can, in qualifying circumstances, provide Form 8804-C to certify certain partner-level deductions or losses that may reduce or eliminate the partnership's Section 1446 withholding on that partner's allocable ECTI.

However, the partnership is not automatically required to accept the Form 8804-C. If it relies on the certificate, additional reporting requirements apply. The IRS instructions also state that ECTI generally is not allocated to the extent the relevant amount is exempt from U.S. tax for the foreign partner under an applicable treaty or other provision of law.

What If the LLC Has No ECTI?

This is where careful classification matters. A U.S. LLC can have foreign members without automatically having Section 1446 withholding. For example, foreign founders might own a U.S. LLC while conducting all of their service activities outside the United States. The LLC's formation state, U.S. customers, or U.S. bank account does not by itself establish that all of its income is ECTI.

The partnership's actual activities, source of income, U.S. trade or business status, and applicable tax rules must be examined. In other words: Foreign partners ≠ automatic Form 8804 tax liability. The relevant question is whether the Section 1446 rules apply to the partnership's income and foreign partners.

Common Form 8804 Mistakes

Foreign-owned LLCs should watch for several recurring problems.

Confusing Form 8804 with Form 1065

Filing Form 1065 does not automatically satisfy the partnership's Section 1446 reporting requirements. The IRS requires Form 8804 to be filed separately.

Waiting until year-end to calculate withholding

Section 1446 payments generally occur throughout the tax year.

Assuming distributions trigger the tax

The withholding calculation is tied to ECTI allocable to foreign partners, not simply cash distributions.

Treating withholding as final tax

Section 1446 withholding is generally a collection mechanism. The foreign partner's ultimate tax liability is determined through the applicable U.S. tax rules.

Ignoring Forms 8805

The foreign partner needs the relevant information from Form 8805 to properly account for partnership withholding.

A Practical Form 8804 Checklist

If your U.S. LLC has foreign partners, ask:

• Is the LLC taxed as a partnership?
• Does it have foreign partners?
• Does it have effectively connected gross income?
• Does it have ECTI allocable to those partners?
• What Section 1446 rate applies?
• Were installment payments made during the year?
• Are Forms 8805 required for the foreign partners?
• Does Form 8804-C apply to any partner?
• Is an underpayment penalty analysis required?
• Is the filing deadline March 15 or a later applicable date?

For international founders using platforms such as Foundeck, an AI-powered U.S. company formation and management platform for global founders, Form 8804 is a good example of why forming a U.S. LLC and maintaining its tax compliance are two different stages of running the business.

FAQ

What is Form 8804 used for?

Form 8804 is used by a partnership to report its annual Section 1446 withholding tax liability. It also serves as a transmittal form for applicable Forms 8805.

Does every U.S. LLC with foreign owners need Form 8804?

No. A foreign-owned LLC generally needs to analyze whether it is a partnership and whether the Section 1446 rules apply to its income and foreign partners. Foreign ownership alone does not automatically create a Form 8804 tax liability.

Is Form 8804 the same as Form 1065?

No. Form 1065 reports the partnership's income and other tax information. Form 8804 reports Section 1446 withholding liability. The IRS requires them to be filed separately.

What is Form 8805?

Form 8805 provides each applicable foreign partner with information about their allocable ECTI and Section 1446 withholding. The partnership generally attaches the applicable Forms 8805 to Form 8804.

When is Form 8804 due?

Generally, Form 8804 is due by the 15th day of the third month following the close of the partnership's tax year. Certain partnerships with books and records outside the United States and Puerto Rico may qualify for a later deadline.

Does filing an extension postpone the tax payment?

No. Form 7004 can extend the filing deadline, but it does not extend the time for paying the tax.

What if the LLC did not distribute any profits?

A lack of distributions does not necessarily eliminate Section 1446 withholding. The partnership generally calculates withholding based on ECTI allocable to foreign partners and makes installment payments during the year.

Can a foreign partner reduce Section 1446 withholding?

Potentially. Form 8804-C allows a foreign partner, in qualifying circumstances, to certify certain partner-level deductions or losses that may reduce or eliminate the partnership's Section 1446 withholding.

Conclusion

Form 8804 is the annual reporting form for Section 1446 partnership withholding, and it can be a critical filing for U.S. LLCs taxed as partnerships with foreign partners.

The form should not be viewed in isolation. The compliance chain can involve Form 1065, Schedule K-1, Form 8804, Form 8805, Form 8813, Form 8804-W, and, in appropriate cases, Form 8804-C.

The most important distinction is that having foreign partners does not automatically mean an LLC owes Section 1446 withholding. The partnership must determine whether it has effectively connected income and ECTI allocable to foreign partners under the applicable rules.

For founders operating internationally, the practical lesson is to calculate the potential Section 1446 liability during the year—not after the annual return is already being prepared. Proper planning can prevent a year-end cash-flow surprise, missed installment payments, and unnecessary penalties or interest.