If you are a businessman in the US, it is vital to understand and choose the right tax form for your business. For many businessmen, particularly non-resident businessmen and new entrepreneurs, it is often difficult to differentiate between Form 1120 and Form 1065. Although these two Tax forms are associated with business taxation, they are used by different business entities and have different requirements.
Understanding these two Tax Forms will not only help you avoid any penalty imposed by the Internal Revenue Service but will also allow you to manage your business finance more efficiently.
In this article, we will explain the basic differences between these two tax forms and who needs to file these forms.
What Is Form 1120?
Form 1120 is the U.S. Corporation Income Tax Return. It is used by corporations to report income, gains, losses, deductions, and credits to the Internal Revenue Service (IRS).
A C corporation is treated as a separate entity from its owners, who are its shareholders. This means it is taxed on its income.
Who Must File Form 1120?
The types of businesses that must file Form 1120 include:
- U.S. C corporations
- LLCs electing to be taxed as corporations
- Foreign corporations with operations in the U.S.
- Corporations with taxable income in the U.S.
Key Features of Form 1120
Here are some key features of Form 1120:
1. Corporate Level Taxation
A C corporation is taxed on its income. Then, it is taxed again by its shareholders on dividends they receive, which is why it is called double taxation.
2. Fixed Tax Rate
Corporate income is taxed at a flat rate. The rate is currently 21%.
3. Detailed Reporting Requirements
Corporations are required to report:
- Gross income
- Cost of goods sold
- Operating expenses
- Depreciation
- Taxes and credits
4. Filing Deadline
The Form 1120 is due by April 15 for calendar-year corporations or the 15th day of the fourth month after the close of the tax year.
What Is Form 1065?
Form 1065 is the U.S. Return of Partnership Income. It is used by partnerships to report financial information for the business.
Unlike corporations, partnerships do not pay income taxes. The income is passed through to the partners and reported on their tax return.
Who Must File Form 1065?
Businesses required to file Form 1065 include:
- Partnerships
- Multi-member LLCs taxed as partnerships
- Some foreign partnerships with U.S. income
Key Features of Form 1065
1. Pass-Through Taxation
The partnership does not pay federal income tax. Its income is paid out to its partners in the form of Schedule K-1.
2. Allocation of Profits and Losses
The profits and losses are allocated to the partners according to the partnership agreement.
3. Informational Return
The 1065 Form is used for filing an informational return with the IRS.
4. Filing Deadline
The deadline is March 15 if they operate on a calendar year.
Differences Between Form 1120 and Form 1065
Recognizing the essential differences between these types will also aid in identifying which one is appropriate for your business.
1. Business Structure
Form 1120 is for corporations, while Form 1065 is for partnerships and multi-member LLCs.
If your business is incorporated, then Form 1120 is required. If your business is owned by multiple members and is therefore a partnership, then Form 1065 is necessary.
2. Tax Treatment
One of the biggest differences is in how taxes are handled.
Form 1120 (Corporations)
- A corporation pays taxes on profit.
- Shareholders pay taxes on dividends received.
Form 1065 (Partnerships)
- A business does not pay tax.
- Partners pay taxes on income.
3. Ownership and Profit Distribution
Corporations and partnerships have different ways of functioning in terms of the distribution of income.
Income belongs to the corporation; shareholders receive dividends.
Income goes directly to partners; each partner reports his or her own share.
4. Complexity of Filing
In general:
Form 1120 can be more complicated because corporations have to report more financial information, corporate governance details, and tax computations.
Form 1065 focuses on the allocation of partnership income and the preparation of Schedule K-1 for each partner.
5. Tax Planning Opportunities
Corporations that file Form 1120 can benefit from:
- Retaining earnings within the company
- Corporate deductions
- Structured compensation strategies
Partnerships that file Form 1065 often benefit from:
- Flexible profit distribution
- Pass-through taxation
- Avoiding double taxation
Key Differences Overview
| Feature | Form 1120 | Form 1065 |
| Business Type | C Corporation | Partnership / Multi-member LLC |
| Taxation | Corporation pays tax | Pass-through taxation |
| Profit Distribution | Dividends to shareholders | Allocation to partners |
| Schedule K-1 | Not required | Required |
| Filing Deadline | April 15 | March 15 |
| Double Taxation | Possible | No |
Which Form Do Non-Residents Usually Need?
Many international entrepreneurs operate businesses in the U.S., and that’s where the confusion comes in.
Here’s a simplified overview:
- If you are a U.S. corporation (C corp) → File Form 1120
- If you are a multi-member LLC that files a partnership return → File Form 1065
- If you are an LLC that elects corporate taxation → File Form 1120
Non-residents should also be aware of the additional reporting that may be necessary, including
- Registration of ITIN or EIN
- State reporting
- Withholding tax compliance
- International tax compliance rules
This is important if you operate an online business, an e-commerce business, or a service-based business that serves the U.S. market.
Common Mistakes Businesses Make
Many businesses make the wrong form selection or are unaware of their obligations. Here are some common errors that should be avoided:
1. Wrong Tax Classification
Many LLC owners assume they have to file Form 1065 when they actually chose corporate taxation.
2. Missing Deadlines
Partnerships with multiple partners may face penalties if they file late.
3. Incorrect Income Allocation
Partnerships may incorrectly allocate income, and this may cause problems with the IRS.
4. International Tax Regulations
Entities with foreign owners have more regulations to follow.
How to Decide Which Form You Need
To determine the correct form, ask yourself these questions:
- Is my business registered as a corporation?
- Does my company have multiple owners?
- Did I elect corporate taxation for my LLC?
- How do I want my profits taxed?
If your business structure is unclear, it’s a good idea to consult a tax professional before filing.
Conclusion
The selection between Form 1120 and 1065 largely depends on the type of business structure you have adopted or the tax classification you have chosen. Usually, corporations file Form 1120, whereas partnerships file Form 1065.
The above information can be very beneficial in adhering to the rules set by the Internal Revenue Service. It can also be very beneficial in efficiently managing your taxes.
This information can be very beneficial to entrepreneurs, especially those who are not residents of the country and are establishing businesses in the US. It can save them a lot of trouble during Tax Season.
If you are not aware which form to file for your business, then you can start by checking your business type. Proper Bookkeeping can also help you in efficiently managing your taxes.
FAQs
1. What is the main difference between Form 1120 and 1065?
The main difference between Form 1120 and 1065 is the type of business entity filing these tax forms. Form 1120 is filed by corporations, while Form 1065 is filed by partnerships and multi-member LLCs. These tax forms are used by businesses to report income to the Internal Revenue Service.
2. Can an LLC file Form 1120?
Yes, an LLC is eligible to file Form 1120. LLCs can be taxed as corporations. By default, multi-member LLCs file Form 1065. However, they can choose corporate taxation by filing an election with the Internal Revenue Service.
3. Do partnerships pay taxes when filing Form 1065?
No, partnerships do not pay taxes when filing Form 1065. Form 1065 is an informational return for partnerships. The income earned by each partner is reported separately by each partner on his/her tax return. The income earned by each partner is reflected in Schedule K-1 attached to Form 1065.
4. What happens if a business files the wrong tax form?
If a business files the wrong tax form, it can result in penalties, delays, and audits. The business has to correct its tax form with the Internal Revenue Service.
5. What are the filing deadlines for Form 1120 and 1065?
In general, Form 1065 is due on March 15, whereas Form 1120 is due on April 15 for businesses that follow a calendar tax year.
6. Do foreign-owned businesses have to file Form 1120 or 1065?
Yes, foreign-owned businesses in the US may be required to file one of these forms, depending on their business type. For instance, a foreign-owned corporation may be required to file Form 1120, whereas a multi-member LLC owned by foreign partners may be required to file Form 1065.
7. Which of these forms is best for saving money on taxes: Form 1120 or 1065?
This depends on your business objectives and type. For instance, corporations that File Form 1120 may be able to save on taxes by retaining earnings, whereas partnerships that file Form 1065 may be able to save on taxes by avoiding double taxation.


