Form 1120S Instructions and Who Has to File It (2024)

This article has been reviewed by tax expertErica Gellerman, CPA.

One of the most confusing aspects of tax time for business owners is knowing which tax forms they need to file. Even if you engage an accountant to prepare your tax return—and we strongly recommend you do—as a business owner and taxpayer you still need to know which forms are required. You also need to have a basic understanding of how these forms are prepared.

Chances are, you started your business as a sole proprietorship or an LLC taxed as a sole proprietorship (what the IRS considers a disregarded entity). As such, you are familiar with the relatively straightforward Schedule C tax form and how it is used to report your business’s taxable profits.

As your business grows, though, your accountant might encourage you to make an S-Corp election status in order to leverage certain tax benefits. If this is the case, you will have a different form to file: Form 1120S.

What Is Form 1120S?

The five-page Form 1120S is essentially your business’s tax return. When a business is taxed as a sole proprietorship, its profit and loss is reported on Schedule C. In an S-Corp, Form 1120S replaces Schedule C as the way the business’s profit or loss is reported to the IRS. Unlike Schedule C, though, Form 1120S is not filed with your personal tax return. It is submitted to the IRS as a separate filing and is typically due on March 15 each year.

As is the case with Schedule C, the profit or loss on Form 1120S will flow through to your personal tax return and impact your personal tax liability. This is because—like sole proprietorships and partnerships—S-Corps are pass-through tax entities, meaning the tax liability belongs to the shareholders of the corporation rather than to the business itself.

When Do You Need to File Form 1120S?

If your business is an S-Corp or an LLC that has completed Form 2553 to make an S-Corp tax election, you will need to file Form 1120S no later than March 15 each year (or September 15 if you file an extension) if you use a calendar year ending December 31.

You will provide Schedule K-1 to each shareholder when you file Form 1120S. Schedule K-1 reflects the portion of the profit or loss in the business that belongs to each shareholder. The shareholders will then use this information to complete their individual tax returns. Even if you are the only shareholder in the business, you will prepare a Schedule K-1 for yourself.

How to File Form 1120S

If you choose to file your tax return yourself, using a tax software that will walk you through the process of completing Form 1120S is your best bet. Many tax software programs will guide you through the process of completing Form 1120S by asking a series of questions, meaning you won’t even see the form until you download it from the software.

Whether you use tax preparation software to complete Form 1120S or engage an accountant to file it for you, you will need to be able to review the form for accuracy. The following step-by-step Form 1120S instructions will help you understand how the form is put together, which will in turn assist you in this review process.

Form 1120S Instructions: 1 Form With 6 Parts

Form 1120S has six parts. Each part of Form 1120S provides specific information.

Part 1 (Page 1)

The first part of the form, which takes up the entire first page, is where you will provide the profit and loss information for your business. Items A through I on this page ask for identifying information about your business, including the date the business was incorporated and the date of S election status (E and A, respectively).

Once the top part of this page has been completed, you will move on to the income and expenses portion of the form. Most of this information will come from your profit and loss statement, but chances are your business’s P&L is more detailed than the first page of Form 1120S. There are special lines—Line 7 and Line 19—for income and deductions that don’t fall into the main categories listed. Additional statements must be attached to Form 1120S to detail these amounts.

If the business wasn’t previously a C-corporation, you can disregard the Tax and Payments section of this page. Refer to page 16 of the instructions issued by the IRS if this section applies to you.

If you plan to file Form 1120S on paper, don’t forget to sign the bottom of this first page. If you paid a preparer to complete the form for you, he or she needs to sign and provide their information, as well.

Schedule B

Yes, Form 1120S contains its own schedules right inside the form itself. The first one is Schedule B. This is where you provide “other information” about your business. Schedule B looks intimidating, but chances are you won’t have to complete everything on it.

Line 1 is where you provide your accounting method. Unless your accountant instructs you otherwise, or unless you have checked something different on previous years’ Form 1120S, check the box for “Cash.” Most small businesses are cash basis tax filers.

On Line 2, you are asked for your business activity and whether you provide products or services. After you have completed this line, most of the remainder of the information on this form is provided by checking either the Yes or No column for each question, and only questions with “Yes” answers require you to provide additional information.

Don’t forget to complete Lines 14a and 14b, though. If you made payments totaling $600 or more for services to one or more non-incorporated entities during the year, your answer to these two questions is Yes.

Schedule K

Schedule K on Form 1120S summarizes the income, deductions, and credits for all shareholders for the year. Don’t confuse Schedule K on Form 1120S with the Schedule K-1 you must provide to each shareholder in the corporation. Schedule K is a summary. Schedule K-1 is a detail per shareholder.

Schedule L

If you answered “Yes” to questions 11a and 11b on Schedule B, you do not have to complete Schedule L. If you answered “No” to either of these questions, you must complete the Balance Sheet, which is part of Schedule L.

As with the first part of Form 1120S, you can pull most of the information needed to complete Schedule L straight from the balance sheet in your accounting software. Your balance sheet will likely have more detail than Schedule L requires, so you will consolidate some of the information and attach an additional statement to your tax return.

Schedule M-1

If you are required to complete Schedule L, you must also complete Schedule M-1. Schedule M-1 reconciles your books to your tax return.

Most businesses have income and expenses from business-related activity that is not included in the taxable profit calculation. Meals and travel expenses are typically only partially deductible for tax purposes, and the business might use a different depreciation method for assets than the method approved for tax purposes.

Your financial statements are used for management purposes and to help you make business decisions 365 days a year. They are used for filing a tax return one day a year. Schedule M-1 reconciles what’s on your books (what’s reported on financial statements) to your tax return.

Line 8 of Schedule M-1 should match Line 18 of Schedule K when you have finished reconciling your books to your tax return.

Schedule M-2

Schedule M-2 is the final section of Form 1120S. Line 8 of this schedule tells you how much money is left in the corporation that hasn’t been distributed or allocated for a specific use. Although it is one of the shorter schedules on Form 1120S, it is also one of the most confusing. Follow the instructions carefully or work with an accountant to ensure it’s completed correctly.

Form 1120S: Simpler Than It Looks, but More Complex Than It Seems

Form 1120S can be overwhelming when you first see it. As you start breaking it down page by page and schedule by schedule, it seems to diminish in complexity. It’s important to feel confident about your understanding of Form 1120S, but it’s equally important not to disregard how tricky this form can be.

The IRS’s instruction document for Form 1120S is 40 pages long, with multiple references to other resources for additional instruction. Not all of the instructions apply to every business, but there is a level of complexity to Form 1120S which this article does not convey. Before you attempt to file Form 1120S yourself, make sure you thoroughly review the IRS’s instructions for each section to ensure you understand how to complete the form for your business.

You don’t have to complete Form 1120S yourself to benefit from the knowledge of what this form is and how it ties in to your overall tax filing obligations. Engage a tax professional to file Form 1120S for you, and then review the completed form with her for accuracy and understanding. This will help both you and your accountant feel confident that your return has been filed properly.

Form 1120S Instructions and Who Has to File It (2024)

FAQs

Form 1120S Instructions and Who Has to File It? ›

Generally, an S corporation must file Form 1120-S by the 15th day of the 3rd month after the end of its tax year. For calendar year corporations, the due date is March 15, 2023. A corporation that has dissolved must generally file by the 15th day of the 3rd month after the date it dissolved.

Who must file 1120S? ›

Corporations that elect to be S corporations use Schedule D (Form 1120-S) to report: Capital gains and losses. Sales or exchanges of capital assets.

Do I need to file 1120S? ›

Form 1120S is how S corporations report how much they make to the IRS. So if your business is an S-corp or taxed as one, you'll have to file Form 1120S as your company's federal income tax return.

Can a sole proprietor file an 1120S? ›

The five-page Form 1120S is essentially your business's tax return. When a business is taxed as a sole proprietorship, its profit and loss is reported on Schedule C. In an S-Corp, Form 1120S replaces Schedule C as the way the business's profit or loss is reported to the IRS.

Do I have to fill out Schedule L on 1120S? ›

If your business grows big enough, you'll be required to report your balance sheet on Schedule L of your S corporation's tax return. Record your income. The first section of Form 1120-S is where your business's income and cost of goods sold are recorded. Record your expenses.

What are the rules for filing as an S corp? ›

To qualify for S corporation status, the corporation must meet the following requirements:
  • Be a domestic corporation.
  • Have only allowable shareholders. ...
  • Have no more than 100 shareholders.
  • Have only one class of stock.
Feb 7, 2023

Which of the following is required to have an S corp? ›

To qualify for S-Corporation status, the business must be a corporation and meet the following requirements: Geography - Organized in the United States. Citizenship - All shareholders must be US Citizens or resident aliens. Number of Shareholders- It cannot have more than 100 shareholders.

What is the penalty for not filing 1120S? ›

The penalty for failure to file a federal S corporation tax return on Form 1120S — or failure to provide complete information on the return — is $195 per shareholder per month. The penalty can be assessed for a maximum of 12 months.

What is the difference between 1120S and k1? ›

Individuals in the United States submit a version of Form 1040 every year for their personal taxes. The business version, when you own an S corp, is Form 1120S. Your K-1 bridges the gap between the business tax return and your personal income tax return.

Does an S Corp need to file an annual report? ›

An S-corp annual report details an S-corporation's activities during the previous year. S-corporations and other companies must file an annual report each year on the state level, typically through the Secretary of State's office in their state.

Is sole owner of an S corp considered self employed? ›

Some business owners wonder, "Am I considered self-employed if I own an S Corp?" Owners of S Corporations are "employed by" the S Corporation and receive a salary. This means that strictly speaking, you are not self-employed since you're considered an employee of the company.

What is the difference between sole proprietor and S corp? ›

Whereas a sole proprietor would have unlimited liability for business debts, in the same scenario, the S-Corporation would generally be liable, instead of the owner. That said, S-Corporations are more strictly regulated and require Corporate Bylaws, shareholder and director meetings, and more record keeping.

What is the difference between individual sole proprietor and S corp? ›

Sole proprietorships, meanwhile, pay both self-employment taxes and income taxes on the profits of the business. S corp owner-employees still pay Federal Insurance Contribution Act (FICA) tax, or Social Security and Medicare taxes, as well as income tax on any salary they draw from the business.

What is the difference between Schedule C and 1120S? ›

Filing. Both C and S corporations must file a federal income tax return. C corporations use Form 1120 to calculate their taxes due. S corporations use Form 1120S as an information return.

How do I fill out 1120S with no income? ›

If there are no transactions to include on the return, the Form 1120 just contains zeros and the identifying information of the business, including the name and employer identification number (EIN). Partnerships and limited liability companies (LLCs) who choose to be taxed as corporations must also file Form 1120.

What line is taxable income on 1120S? ›

The taxable income reported on Schedule M-1, line 8, is available from the calculation of Form 1120-S, page 3, Schedule K, line 18; Schedule M-1, line 1, “Net income (loss) per books,” is not available without book-to-tax adjusting entries.

What is the 2 year rule for S corp? ›

If, after the 2-year period, the trust continues to hold S corporation stock and does not otherwise qualify as a permitted shareholder, the corporation's S election terminates. If the termination is inadvertent, the corporation may request relief under section 1362(f).

What is the minimum income for an S corp? ›

Is There a Minimum Salary for S Corp? No, there is not a minimum salary for S Corp. The IRS can't require a minimum salary for self-employed workers.

Can I file my S corp separately? ›

Corporation. C-corporation or S-corporation owners can file their personal and business taxes separately, as the IRS sees corporations as separate entities from the owner. As a result, business expenses are reported separately using Form 1120.

What is the 5 year rule for S corp? ›

Once a valid S corporation election is terminated or revoked, the corporation or any successor corporation is generally prohibited from making a new election for five years. The five-year period begins with the tax year after the first tax year for which a termination or revocation is effective (IRC § 1362(g) ).

What is the difference between an S corp and a sub S corp? ›

A sub S corp is a taxation status given to qualified small corporations and limited liability companies (LLCs) to protect them from federal double taxation. This taxation type is only available to entities with 100 or less U.S. shareholders. Corporate or business shareholders are not allowed in S corps.

What are the types of businesses that Cannot be S corp? ›

Your business must be a domestic corporation. The company cannot have over 100 shareholders. Other entities cannot own an S corp, such as estates and trusts.

Do you pay taxes on 1120-S? ›

Annual business tax returns

Even though the S corporation does not pay income tax, it has a responsibility to file an annual tax return on Form 1120S. This tax form is for informational purposes only and provides the IRS with an aggregate view of the business' earnings and expenses.

What is the Max S-corp late filing penalty? ›

Penalties for filing late

If the corporation files its Form 941 after the deadline and it has an unpaid tax balance, a 5 percent penalty may be assessed on the balance for each month or partial month the tax is late, up to a maximum of 25 percent.

What is the penalty per shareholder for late filing of S-corp? ›

S Corp Failure-to-File Penalty

The penalty for failure to file a federal S corporation tax return on Form 1120S -- or failure to provide complete information on the return -- is $195 per shareholder per month. The penalty can be assessed for a maximum of 12 months.

Who gets a k1 from an S corp? ›

An S corporation need to fill out the Form 1120S to file annual tax returns just like partnerships. Every shareholder in the corporation receives a Schedule K-1 after the Form 1120S is filed. The shareholders report all of the information on the K-1 to report the allocated income on their separate tax returns.

Can I file 1120S with TurboTax? ›

With NEW TurboTax Live Full Service Business, we enable the small business owner to be paired with a dedicated tax expert specializing in small business taxes to handle Partnerships (1065), S-corp (1120-S), and multi-member LLCs.

Where do distributions go on 1120S? ›

Each shareholder's distribution amount for the corporation's fiscal year should be reported on Schedule K-1 (Form 1120-S) Shareholder's Share of Income, Deductions, Credits, etc., Line 16, with "D" as the reference code.

Which companies are required to file annual return? ›

According to the Companies Act 2013, every registered company is supposed to file an annual report before the start of the next financial year. all the companies need to file the annual return to the ROC stated under section 92 of the Companies Act.

What happens if an annual report is not filed? ›

Also, if you do not file the Annual Report in a timely manner, the Secretary of State can administratively dissolve your company. If your company is administratively dissolved, your company is no longer in good standing with the State, though it may still be sued.

Who prepares a company's annual report? ›

Most public companies hire auditing companies to write their annual reports. An annual report begins with a letter to the shareholders, then a brief description of the business and industry.

Do all S corp owners have to take a salary? ›

The IRS requires that all S corp owners, also known as shareholders, who are actively involved in running the business receive a W-2 salary. As the business owner, you are still entitled to draw money from the business in the form of a shareholder distribution.

Do S corp owners have to be on payroll? ›

Do S corp owners need to be on payroll? S corporation owners who perform more than just minor work for the business typically need to be on the payroll because they must pay themselves a reasonable salary.

Can you have an S corp with no employees? ›

An S corporation is able to hire employees, but employees are not a requirement. S corporations get taxed the same as partnerships and sole proprietorships. All three of these entities enjoy pass-through taxation. All profits of an S corporation get taxed on shareholders' annual individual returns.

Should my LLC be taxed as an S Corp or sole proprietorship? ›

If you form an LLC without electing S Corp taxation, you stand to pay more in taxes, because you'll be taxed as a sole proprietorship by default. Electing S Corp taxation for your LLC could save you a lot of money in taxes each year.

Do you pay more taxes as a sole proprietor or an S Corp? ›

An S Corporation also pays less taxes than a Sole Proprietorship because not all of its income is subject to FICA taxes.

When should you switch from sole proprietor to S Corp? ›

When it comes to accounting, the easiest time to switch is January 1st. Forming your S Corp at the beginning of the tax year makes record keeping and tax preparation easier because you'll need to track your S Corp finances separately from your sole proprietor finances.

How do I know if I am an individual or a sole proprietor? ›

A sole proprietor is someone who owns an unincorporated business by himself or herself. However, if you are the sole member of a domestic limited liability company (LLC), you are not a sole proprietor if you elect to treat the LLC as a corporation.

What are the benefits of an S corp versus a sole proprietorship? ›

If your business is an S corp, you have more protections related to liability. If there are business debts, typically, the corporation is liable for them, rather than the owner, meaning your business assets may be at risk, but your personal assets are not.

What are the benefits of an S corp vs LLC sole proprietor? ›

Key takeaways: S corp.: Owner can take a salary and avoid self-employment taxes on the rest of profits. LLC: Owner must pay self-employment tax on all net profits if taxed as a sole proprietorship or partnership.

Should I file Schedule C or S Corp? ›

Single layer of taxation: The main advantage of the S corp over the C corp is that an S corp does not pay a corporate-level income tax. So any distribution of income to the shareholders is only taxed at the individual level.

Should I file Schedule C or 1120S? ›

The five-page Form 1120S is essentially your business's tax return. When a business is taxed as a sole proprietorship, its profit and loss is reported on Schedule C. In an S-Corp, Form 1120S replaces Schedule C as the way the business's profit or loss is reported to the IRS.

What is the minimum income to file Schedule C? ›

There is no minimum income threshold for filing IRS Schedule C. You must report all business income and expenses on your Schedule C, no matter how much or how little you make. The minimum threshold for paying self-employment tax is $400.

Can I file 1120S myself? ›

Like most tax forms, Form 1120S can be filed electronically through the IRS's e-file system, or with most tax prep software. You can also file the form by mail. Here's where to send your return.

What happens if you don't file 1120S? ›

Late filing of return.

If tax is due, the penalty is the amount stated above plus 5% of the unpaid tax for each month or part of a month the return is late, up to a maximum of 25% of the unpaid tax. The minimum penalty for a return that is more than 60 days late is the smaller of the tax due or $450.

Do I have to do a balance sheet for 1120S? ›

Not all corporations have to submit a balance sheet, and many smaller corporations do not complete Schedule L. However, when a corporation is required to submit a balance sheet with the tax return, it is critical to submit an accurate balance sheet that is consistent with the other items reported on the tax return.

What is IRS form 1120s used for? ›

A form 1120-S is the tax return form for businesses registered as S corporations, a type of corporation that avoids double taxation at both the corporate and personal level. S corps use this tax form to report any profits, losses, and deductions for that fiscal year.

How do I prepare for 1120s? ›

How to fill out Form 1120-S
  1. Keep your accounting records and financial statements up-to-date. ...
  2. Record your income. ...
  3. Record your expenses. ...
  4. Calculate your net profit or loss. ...
  5. Record taxes owed and payments made. ...
  6. Answer questions on Schedule B. ...
  7. Complete Schedule K. ...
  8. Complete Schedule L.
Feb 8, 2023

Do I pay income tax on S corp? ›

Because of pass-through taxation, the S corporation doesn't pay federal income tax on its business income the way a C corporation does. Instead, business income, deductions, losses, and other tax items flow through (or pass through) to the business owners (e.g., the shareholders).

How do you tell if a company is an S corp or C Corp? ›

In summary, you are able to determine whether a business is an S corporation or a C corporation by reviewing its formation documents, income tax filings, ownership/shareholder structure, and overall tax treatment. It's vital to know the company's tax status as it will impact its tax bill and any shareholder liability.

What is the difference between an 1120 and 1120S? ›

Differences Between Form 1120 and 1120-S

Form 1120-S is filed by S Corps for federal taxes, while Form 1120 is filed by C Corps for taxes. S Corps and C Corps are both classified as corporations; however, they have several differences and offer different advantages and disadvantages to business owners.

Do I file 1120 or 1120S? ›

Both C and S corporations must file a federal income tax return. C corporations use Form 1120 to calculate their taxes due. S corporations use Form 1120S as an information return. S corporations must also prepare a form 10 K-1 for each shareholder to include with their individual returns.

How to tell if a company is S corp or C corp from the tax return? ›

C corporations file taxes on Form 1120. S corporations file taxes like a sole proprietorship or a partnership. The profits (or losses) pass through an S corp to the shareholders, who pay taxes and report them on their personal tax returns. S corporations file on Form 1120-S.

Should my small business be an S corp or C corp? ›

S corps are suited for smaller, domestic businesses that want to treat all owners the same way. C corps give companies unlimited growth potential and flexible options for ownership and profit distribution.

Why would you choose C corp over S corp? ›

Less Ownership Restrictions: While an S Corp is subject to many strict regulations set forth by the IRS, C Corp owners benefit from more flexibility and less restrictions. A C Corp can have unlimited owners, including foreign owners, and can have more than one class of stock.

Does 1120S pay taxes? ›

A form 1120-S is the tax return form for businesses registered as S corporations, a type of corporation that avoids double taxation at both the corporate and personal level. S corps use this tax form to report any profits, losses, and deductions for that fiscal year.

What is the purpose of the Schedule K-1 form 1120S to report? ›

Purpose of Schedule K-1

The corporation uses Schedule K-1 to report your share of the corporation's income, deductions, credits, and other items. Keep it for your records.

How do I file 1120s with no activity? ›

If there are no transactions to include on the return, the Form 1120 just contains zeros and the identifying information of the business, including the name and employer identification number (EIN). Partnerships and limited liability companies (LLCs) who choose to be taxed as corporations must also file Form 1120.

What line is taxable income on 1120s? ›

The taxable income reported on Schedule M-1, line 8, is available from the calculation of Form 1120-S, page 3, Schedule K, line 18; Schedule M-1, line 1, “Net income (loss) per books,” is not available without book-to-tax adjusting entries.

Is Schedule C same as 1120s? ›

Form 1120 is a little more involved than a Schedule C; it asks more questions and you must provide balance sheet information for the beginning and end of the tax period. Form 1120 is not filed as part of your personal income tax return.

Who pays taxes for 1120 S? ›

S corporations are considered pass-through entities as they don't pay corporate taxes. Instead, they pass the tax liabilities to their individual shareholders. The IRS uses the ownership percentage detailed in Form 1120-S to allocate how much profit and loss is assigned to an individual shareholder.

What happens if you don't file form 1120? ›

Failing to File

When you fail to file a Form 1120 by the deadline, the corporation is charged a monthly penalty that's equal to 5 percent of any income tax that remains unpaid. Moreover, the corporation will reach the maximum 25 percent penalty after the fifth month that the return remains unfiled.

When should form 1120 be filed? ›

Form 1120 (or Form 7004).

This form is due on the 15th day of the 4th month after the end of the corporation's tax year. However, a corporation with a fiscal tax year ending June 30 must file by the 15th day of the 3rd month after the end of its tax year.

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