Does every corporation file income tax returns?

A corporate income tax return must be filed by any U.S. business that makes net income during a tax year. Whether these corporations must pay income tax or not is a different topic. For example, a limited liability company (LLC) does not pay federal income taxes since it is not a separate tax entity, unlike a corporation (though some states do require LLCs to pay taxes).

The two main types of corporations that must file federal tax returns are:

· C corporations: The most common type of corporation is a C corporation, which is a legal form in which the owners or shareholders are taxed independently of the company. Federal corporate income taxes apply to these corporations. Business profits are liable to both corporate and personal taxation, which could result in double taxation.

· S corporations: An S corporation does not pay federal corporate taxes and may provide income (as well as various credits, deductions, and losses) directly to shareholders. This category, which is typically used for small companies with 100 or fewer shareholders, provides both the tax-exempt advantages of a partnership and the standard advantages of incorporation.

C corporations and S corporations both must file corporate tax returns to local, state, federal, and maybe international authorities once a tax year via corporate tax returns.

7 steps for preparing corporate tax returns and filings

1. Determine if your corporation is a C corporation or an S corporation

By default, a corporation other than an LLC in the U.S. is a C corporation. Once you have established your company as a C corporation, you can then file an option to be taxed as an S corporation, which means that tax obligations pass through to the owners’ personal tax reporting.

If you don’t know what kind of corporation your business is, call the IRS Business Tax Line at 800-829-4933. The IRS can tell you whether you should file taxes as a C corporation or an S corporation.

2. Determine your tax deductions for write-offs

The next step in preparing a corporate tax return is determining the tax deductions you’ll be able to write off. For corporations, the IRS allows you to deduct all current expenses necessary for the operation of your business, as well as certain investment and real estate purchases, employee salaries and benefits, some taxes, insurance payments, and more. Section 162 of the Internal Revenue Code details the allowable business expenses.

3. Pay your estimated taxes to the IRS

Next, estimate how much tax you’ll need to pay on the net amount. Then, if your business is a C corporation, submit estimated tax payments four times a year to state and federal authorities. S corporations typically don’t pay income taxes, since they pass tax obligations through to their shareholders, which means that they usually don’t pay estimated taxes. However, S corporations do need to pay estimated tax when their tax on built-in gains, the excess net passive-income tax, and the investment credit recapture tax total $500 or more. C corporations usually must also pay estimated taxes to one or more states.

4. File your federal tax return by its due date

C corporations use Form 1120 to file their federal income taxes, while S corporations use Form 1120-S. An S corporation’s shareholders must report their share of income from the corporation on a Schedule K-1 attached to their personal tax returns.

When are corporate tax returns due?

· C corporations must file on the 15th day of the fourth month after the fiscal year’s end. That means that for C corporations whose fiscal year ends on December 31, tax returns are due by April 15. The only exception to this rule is for a corporation whose fiscal year ends on June 30, which must file a tax return by September 15.

·  S corporations must file on the 15th day of the third month, which usually means that these companies’ tax returns are due on March 15. Tax calendar software can help you keep track of these deadlines.

How do you file an extension for your corporate tax return?

The IRS provides Form 7004 for companies that want to request an automatic 6-month extension to file their income tax and other returns. As with tax extensions for individuals, filing the form does not extend the date on which any payment is due.

What is the penalty for filing corporate tax returns late?

Missed-deadline penalties for C corporations and S corporations (if you owe the IRS) are 5% of the outstanding tax for up to five months, shifting to a different percentage thereafter, depending on the amount owed.

Are you required to e-file your corporate federal return?

Most corporations don’t need to e-file, but C corporations and S corporations must file their federal income tax returns through either approved software or a tax professional who is an authorized e-file provider. Tax professionals who want to e-file for their clients must be Authorized IRS E-file Providers or Electronic Return Originators.

5. File your state tax returns by their due dates

You also need to file a return for any state in which you conduct business, if that state requires it.

When are state corporate income taxes due?

Although most states require a corporation to file its income tax return on the same day that it files its federal taxes, this is beginning to change. Several states now have due dates one month or later, to give taxpayers more time to complete their federal returns, on which the state returns are based.

What are the state filing requirements for corporations?

Not all states have the same tax filing requirements for corporations. While 44 states and the District of Columbia do have corporate income taxes, some states (namely, Ohio, Nevada, Texas, and Washington) tax corporate gross receipts instead. Two states, South Dakota and Wyoming, currently have no corporate income tax or gross receipts tax.

How are state taxes calculated?

States use various formulas to determine how much of a company’s income from sales should be taxed in that state, a process called apportionment. It’s important to keep abreast of the details for each state in which you do business, as well as other state-specific details like corporate tax rates, deduction rules, and due dates for estimated tax payments and annual returns.

6. File local tax returns by their due dates

Corporations may also be liable for taxes to city, county, or regional jurisdictions. Local taxing authorities are less likely to require estimated tax payments, but it’s important to check the local rules that apply to your business. Most local tax returns are due on the same schedule as state taxes, but that is also a detail to check before filing.

7. File international taxes for any business in other countries

U.S.-based organizations that do international business will also need to consider the specialized rules and guidance for paying and filing corporate taxes globally. Companies should keep in mind that the IRS allows companies to file for a foreign tax credit to defray U.S. tax obligations to account for taxes paid to other countries on income derived from business there.

Addressing corporate tax return challenges for corporations

Tax teams face many challenges in preparing and filing tax returns accurately. It’s essential to keep up with changes in tax rules and regulations, which happen frequently at all levels. This can be particularly challenging if your company has nexus in multiple states and you’re required to file taxes in multiple jurisdictions.

Survey results from prominent global companies have revealed the top five challenges corporate tax professionals faced in 2025:

1. Political changes

2. Hiring/talent

3. Digital transformation

4. Pillar 2 (Global minimum tax, BEPS 2.0)

5. Complex geopolitical factors

A good tax research tool coupled with income tax technology can help your team tackle these challenges and file your company’s corporate tax returns faster, efficiently, and more accurately.

Conclusion

In the United States, filing business in Texas for corporations is a very important task that requires careful planning and pure accuracy. It's very important to know that if your company is a C corporation or an S corporation, then this knowledge will help you to understand how your business income is taxed. With this helpful guide, you can avoid mistakes and fines by being aware of tax laws. It's also helpful to face deductions and deadlines.

FAQs

1. Do all corporations in the USA have to file a tax return?

Yes, all C corporations and S corporations must file federal corporate tax returns, even if no tax is owed for the year.

2. What is the main difference between C corporations and S corporations for taxes?

C corporations pay corporate income tax at the entity level, while S corporations pass income and tax responsibility to shareholders.

3. Which IRS forms are used for corporate tax filing?

C corporations file Form 1120, and S corporations file Form 1120-S, with Schedule K-1 issued to shareholders.

4. Can a corporation get more time to file its tax return?

Yes, corporations can request a six-month filing extension by submitting IRS Form 7004, but taxes must still be paid on time.

5. Are corporations required to file taxes in every state they operate in?

Yes, if a corporation has taxable presence in a state, it must follow that state’s corporate tax filing and payment rules.