Taxation Requirements for an S Corporation


An S corporation, also known as an S-corp, is a popular business structure for small and medium-sized companies. It offers a number of benefits, including limited liability protection and the ability to pass through income and losses to shareholders. However, S-corps also have specific tax requirements that must be followed. In this blog post, we will take a closer look at the taxation requirements for an S-corp, including filing requirements, income taxes, and self-employment taxes.

Filing Requirements

S-corps are required to file an annual tax return, Form 1120S, with the IRS. The return must be filed by the 15th day of the 3rd month following the end of the company’s tax year, which is typically December 31st. The return must include information on the company’s income, deductions, and credits, as well as the names and addresses of the shareholders.

In addition to the annual return, S-corps are also required to file Schedule K-1 with the IRS, which shows the share of income, deductions, and credits allocated to each shareholder. Shareholders are then required to report this information on their personal tax returns.

Income Taxes

S-corps are considered pass-through entities, meaning that the company’s income and losses are passed through to the shareholders and reported on their individual tax returns. The company itself does not pay income taxes, but shareholders are required to pay taxes on their share of the company’s income.

However, S-corps are subject to certain restrictions on the types of income they can generate and still be considered a pass-through entity. Generally, passive income, such as rent, and investment income, such as interest and dividends, are not eligible for pass-through treatment, and are subject to a special tax called “built-in gains tax”.

Self-Employment Taxes

S-corp shareholders who also work for the company are considered employees and are required to pay self-employment taxes on their share of the company’s income. Self-employment taxes include Social Security and Medicare taxes, and they are calculated at a rate of 15.3%.

However, S-corp shareholders can also elect to take a salary and be considered an employee for tax purposes, which means that they would be subject to the same payroll taxes as any other employee. This can be a more tax-efficient option for shareholders who have significant income from the company.


S-corps have specific tax requirements that must be followed in order to maintain their pass-through status and avoid additional taxes. It is important for S-corp shareholders to understand these requirements and work with a tax professional to ensure that they are in compliance with all applicable laws. Overall, tax compliance for an S-Corp can be complex and requires a good understanding of the tax laws and regulations, and it’s advisable to seek the help of a tax professional to ensure compliance and minimize tax liability.

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