Blog

S Corp Compliance: What You Need to Know About Payroll & Filings

Marlene Seefeld

Operating an S Corporation (S Corp) involves adhering to specific compliance requirements, particularly concerning payroll and tax filings. Here's a comprehensive overview:

1. Payroll Compliance:

  • Obtain an Employer Identification Number (EIN): Before hiring employees or processing payroll, your S Corp must secure an EIN from the IRS. This identifier is essential for tax filings and reporting.

  • Paying Reasonable Compensation: The IRS mandates that S Corp shareholder-employees receive a salary that reflects the value of services provided. This salary is subject to employment taxes.

  • Withholding and Remitting Payroll Taxes: S Corps are responsible for withholding federal income tax, Social Security, and Medicare taxes from employees' wages. Additionally, the corporation must pay the employer's portion of Social Security and Medicare taxes, as well as federal and state unemployment taxes.

  • Filing Payroll Tax Forms: Regular filing of payroll tax forms is crucial. Key forms include:


    • Form 941: Filed quarterly to report income taxes, Social Security, and Medicare taxes withheld.
    • Form 940: Filed annually to report federal unemployment taxes.
    • Form W-2: Provided annually to employees, summarizing their earnings and tax withholdings.

2. Federal Tax Filings:

  • Form 1120-S: Annually, S Corps must file Form 1120-S to report income, gains, losses, deductions, and credits. This form is due by the 15th day of the third month after the end of the tax year, typically March 15 for calendar-year taxpayers.

  • Schedule K-1: Alongside Form 1120-S, the corporation must provide each shareholder with a Schedule K-1, detailing their share of the company's income, deductions, and credits. Shareholders use this information to report their share of S Corp income on their personal tax returns.

3. State-Specific Filings:

  • State Income Tax Returns: Depending on the state, S Corps may need to file state income tax returns. For instance, in California, S Corps are required to file Form 100S if they are incorporated, doing business, registered, or receiving income from California sources.

  • Franchise Taxes or Fees: Some states impose franchise taxes or additional fees on S Corps. It's essential to consult your state's tax authority to understand specific obligations.

4. Maintaining Corporate Formalities:

  • Annual Reports: Many states require corporations to file annual reports, providing updated information about the business.

  • Record-Keeping: Maintaining accurate records of corporate meetings, decisions, and financial transactions is vital for legal compliance and can protect the corporation's limited liability status.

Adhering to these compliance requirements ensures that your S Corp remains in good standing with federal and state authorities, helping to avoid potential penalties and legal issues.