As an entrepreneur that has formed their business in the United States but is not a citizen of America, one of the major issues that you will face at the start of each tax period will be “What federal tax form should I really file?”
There are several different tax forms for US businesses: Form 1120 vs 1065 Filing being some of the most popular. However, choosing the wrong one may cost you a lot of trouble.
In this post, we’ll outline what differentiates Form 1120 vs 1065 filing, explain why either of the forms applies to your foreign-owned US LLC, and highlight major filing obligations for 2026.
What is Form 1120?
Form 1120 has the name of “U.S. Corporation Income Tax Return”. It is used for reporting incomes by companies based in USA territory and incorporated there in accordance with American laws (C-corporations).
Thus, when you are a foreign entrepreneur from either India or Africa with a company registered as a Delaware C corporation in America (which is the most common legal structure for starting a business, especially for attracting US venture capital from foreigners), you have no option but to file your tax returns through Form 1120.
Key facts about Form 1120 in 2026:
- The corporations will be taxed using a 21% rate for the federal corporate tax.
- When looking at the situation for the year 2026, the date when the corporations’ tax return must be filed is 15th April, 2026, and it could be extended until 15th October, 2026.
- Should a foreign individual own a C corporation, the corporation would have to file Form 5472 alongside their corporate tax return.
- Even without the business being operated in 2025, that should not prevent the corporation from filing a nil return.
What is Form 1065?
Form 1065 refers to the US Partnership Tax Return that needs to be completed by partnerships and multi-member LLCs.
A partnership does not get taxed just like a corporation; rather, it functions as a flow through entity whereby profits and losses are shared between all the partners or members in the business. Each member gets taxed on his/her share of profit or loss on his/her own personal tax return. Non-resident foreign partners might file Form 1040-NR where necessary.
Filing such a form provides the IRS with insight into how the business income was split among partners.
Key facts about Form 1065 in 2026:
- A six-month extension would result in September 15, 2026, as the filing date.
- Allocation of Schedule K-1 among individual partners is made in accordance with percentage income, deduction and credit.
- Withholding tax needs to be provided for foreign partners as partners pay their taxes. Such taxes are documented with Forms 8804 and 8805.
- A US limited liability company owned by two or more foreigners is automatically treated as a partnership.
Main Difference Between Form 1120 vs 1065 Filing
The biggest difference lies in Form 1120 vs 1065 filing: how taxes are handled.
| Factor | Form 1120 | Form 1065 |
| Business type | Corporation | Partnership |
| Tax treatment | Corporate-level taxation | Pass-through taxation |
| Tax payment | A corporation pays taxes | Partners pay taxes individually |
| Ownership structure | Shareholders | Partners or members |
| Additional forms | Corporate schedules | Schedule K-1 |
Understanding your company’s legal and tax structure of Form 1120 vs 1065 Filing determines which form applies.
What About Single-Member LLCs Owned by a Foreign Person?
Even more difficult to comprehend for international entrepreneurs. Below is a list of points you should bear in mind:
If the SMLLC is not treated as a person in the USA, then it will be viewed as a disregarded entity under U.S. tax laws. Consequently, no taxes are paid on the LLC profit.
Which Form Does Your Business Need? A Simple Decision Guide
File Form 1120 when:
- You are a company based in US and operating as a C Corporation (Delaware/Wyoming etc.)
- You have opted to report taxes on basis of an S-Corporation (though S-corporations report taxes using Form 1120-S)
- You are an LLC operated by foreigners hence Pro-Forma Form 1120 and 5472
File Form 1065 when:
- You own a multi-member LLC in the USA (minimum number of owners/members equals two)
- You own a general partnership or limited partnership in the United States of America
- You do not elect to be filed as a corporation despite owning an LLC
You do neither of the above when:
- Your LLC is foreign-owned single-member LLC and only files Pro-Forma 1120 and Form 5472
- You are a sole proprietor filing ITIN
Important 2026 Deadlines for Foreign-Owned US Businesses
|
Form |
Entity Type | Due Date: 2026 | Due Date for Extensions |
| Form: 1065 | Taxpayer: Partnership or Multi-Member LLC (MMLLC) | Date: March 15, 2026 | Date: September 15, 2026 |
| Form 1120 | Taxpayer: C-Corporation | Date: April 15, 2026 | Date: October 15, 2026 |
| Form 5472 + Pro Forma 1120 | Foreign-Owned Single-Member LLC (SMLLC) | April 15, 2026 | October 15, 2026 |
| Form 8804 / 8805 | Partnership with Foreign Partners | March 15, 2026 | September 15, 2026 |
| FinCEN BOI Report | All US Entities | Varies by formation date |
No extension available |
To check out the full list of requirements, see LLC Annual Report and Compliance Guide for Non-US Founders 2026.
Note: There can be changes in filing dates and other regulations depending on the IRS policies. Make sure to clarify your filing obligations.
Common Mistakes Foreign Founders Make with US Tax Filings
1. Not meeting the Form 5472 requirements for the SMLLC.
A number of founders believe that since their SMLLC generated no US income, there is no need for filing. Wrong. All foreign owners’ SMLLCs should submit Form 5472, including those with zero activity during the year. The failure fee amounts to $25,000.
2. Submitting Form 1065 when you need to file Form 1120.
A few founders do not understand their LLC’s tax treatment. In case the LLC elects C-corporation status through Form 8832, it must use Form 1120 and not Form 1065.
3. Not meeting the earlier Form 1065 filing deadline.
This document should be filed on March 15th, which is one month earlier than the usual April 15th tax filing deadline. Missing this date will incur a late fee.
4. Not issuing Schedule K-1 to foreign partners.
In case of any foreign ownership, you must prepare Schedule K-1, and if necessary, withhold income from a partner’s US income. It also relates to withholding tax on dividends rules that many foreign founders neglect. The issuance of this statement should not be confused with information filing.
5. Assuming that filing cannot happen without generating revenue.
Corporations and partnerships that do not earn any revenue must file annually; however, their filings will be zero-return filings.
Entity Type Tax Classification: How the IRS Sees Your US Business
Knowing how the IRS classifies your type of business is critical to identifying which tax form you should use. The information below will guide you in this endeavour:
- C-corporation, Delaware – Form 1120 is always used.
- LLC Multi-Member default (no election is made) – Form 1065 is used (regarded as a partnership)
- LLC Multi-Member (C-corporation election via Form 8832) – Form 1120 is used.
- LLC Single Member Foreign Owner (no election is made) – Disregarded entity form; Form 1120 pro forma is used in addition to form 5472.
- LLC Single Member (C-corporation election via Form 8832) – Form 1120 is used.
- Partnership general form – Form 1065 is used.
- Partnership Limited form – Form 106
Should You Consider Changing Your Entity Classification?
However, for the international founders, there is an opportunity that the default taxation structure may not work the best. For example:
Change Form 1120 vs 1065 Filing, where:
- You wish to seek venture capital funding since most of the U.S. investors require C-Corp structuring.
- Your plan is to retain the cash within your business rather than making payments using the personal foreign tax rate. Instead you will enjoy the favorable corporate rate of 21%
- Issuance of stock options to your employees or advisers
Remain in the 1065 format where:
- You have a services-orientated business such as consultancy
- The founding team would like to have flexibility in terms of distribution of profits among themselves without involving any corporate structures.
- You come from a country that has a bilateral tax treaty with the U.S.—see also FEIE and Foreign Earned Income Exclusion 2026.
Final Thoughts
There are certain things to be considered when it comes to selecting either Form 1120 vs 1065 filing. There must be a need to evaluate the organisational structure of your business first before making a decision.
Many foreigners who own businesses in the USA normally have problems in determining ways to pay their taxes since there are different ways of doing this depending on whether the entity is an LLC, a partnership or even a corporation.
At any particular time, if you experience any difficulty in relation to the choice of the tax form for your foreign corporation in the year 2026, then this information will be useful.
Do you want to Form 1120 vs 1065 Filing to incorporate a company in the United States but lacking information regarding taxes? Contact E-Startup for comprehensive assistance in matters concerning taxation.
FAQs
Can a foreigner own a US C-corp?
Yes. Foreign persons may own US C-corps without limitation. In such a case, Form 1120 must be filed, and the foreign owner must be reported as a beneficial owner using Form 5472 in the case of reportable transactions between the foreign person and the corporation.
Would an LLC registered in the name of a foreigner always need to submit a Form 1065?
No, only when there are at least two members, and the LLC doesn’t elect to be taxed as a corporation via Form 8832. Single-member foreign LLCs are treated as disregarded entities; thus, no taxes should be filed.
What would happen in the event of missing the deadline?
A $235 monthly penalty is charged by the IRS for late filing of Form 1065 in 2026 for each partner. Consequently, if the filing for a partnership with three members is submitted after five months past the due date, penalties of $3,525 will have to be paid along with the interest.
Do I really need an American tax expert for filing those?
While you technically may complete these procedures yourself, most foreign entrepreneurs would greatly appreciate employing a US CPA or EA who has the expertise in international taxes.
