Form 4137

Social Security and Medicare Tax on Unreported Tip Income

What is a 4137 Form?

The IRS Form 4137, known formally as "Social Security and Medicare Tax on Unreported Tip Income," is an essential tax form for many workers in the United States. This document serves the critical purpose of ensuring that income received from tips, which was not reported to an employer, is accurately accounted for and taxed appropriately for Social Security and Medicare purposes.

Purpose and Significance

The primary goal of the 4137 form is to maintain the integrity of the Social Security and Medicare systems by ensuring all earned income is reported and taxed accordingly. This includes tip income that employees might receive directly from customers, which employers may not always be aware of. By filling out Form 4137, employees contribute their fair share to their future benefits from these systems.

Components of the Form

Form 4137 is structured to guide taxpayers through calculating the Social Security and Medicare taxes owed on their unreported tip income. Key components include:

  • Section for reporting total unreported tip income
  • Calculations for Social Security and Medicare taxes due
  • Space for detailing any allocated tips

Understanding these components is the first step in accurately completing the 4137 form and ensuring compliance with tax obligations.

Who Needs a 4137 Form?

Not everyone will need to file a 4137 form with their taxes. This form is specifically designed for:

  • Employees who received $20 or more in tips in any single month of the tax year, and did not report these earnings to their employer.
  • Individuals who have a discrepancy between their reported earnings and their actual tips received.

Obligations and Deadlines

Filing this form becomes necessary when there is unreported tip income. The IRS expects these forms to be filed annually, alongside your regular tax returns, typically by April 15th.

How to Read and Understand the 4137 Form

Understanding the 4137 form requires a close look at its structure. The form asks for detailed information about your unreported tips and uses this to calculate the extra taxes owed. Key terms include:

  • Unreported tips: Money earned directly from customers that was not reported to your employer.
  • Allocated tips: Tips assigned to you by your employer, possibly appearing on your W-2 form, that need to be considered in your calculation.

How to Get Your 4137 Form

Obtaining a 4137 form is straightforward. The IRS provides all necessary forms online. You can download Form 4137 directly from the IRS website.

Common Mistakes and How to Avoid Them

Filing your 4137 form accurately is crucial to avoid potential penalties. Common errors include:

  • Not reporting all tip income. Ensure you're keeping daily records of your tips.
  • Misunderstanding allocated tips. Clarify with your employer any allocated tips reported on your W-2 form to avoid double reporting.

4137 Form and Tax Filing

Including Form 4137 in your tax filing affects your overall tax obligations and possibly your returns. By accurately reporting tip income, you ensure that you are paying the correct amount of taxes, thus avoiding potential issues with the IRS.

FAQ Section

  1. Q: Is filing a 4137 form mandatory? A: Yes, if you have unreported tips of $20 or more in a month.

  2. Q: How does the IRS verify reported tips? A: The IRS may compare your reported tips with typical earnings in your industry.

  3. Q: Can failing to report tips lead to penalties? A: Yes, failing to report income, including tips, can result in penalties.

  4. Q: Do tips shared with colleagues need to be reported? A: You only need to report your portion of shared tips.

  5. Q: What if my employer already reports my tips? A: If your employer reports and withholds taxes on your tips, you may not need to file Form 4137, unless there is unreported income.


Understanding and accurately completing Form 4137 is essential for workers in tip-based roles. By reporting all tip income, employees can avoid potential penalties and ensure they are contributing appropriately to Social Security and Medicare. While the process may seem daunting, this guide aims to simplify it, providing all the necessary information to comply with IRS requirements.

We encourage individuals with complex tax situations or uncertainties to consult with a tax professional. Proper guidance can help navigate the complexities of tax law and ensure compliance.

For more information, resources, and the form itself, visit:

By using this guide alongside the provided resources, you can confidently tackle the 4137 form, ensuring that your tax filings are complete and accurate. Always remember to keep detailed records of your earnings, and when in doubt, seek professional advice.

Always refer to the IRS website or a tax professional for the most accurate and up-to-date information. provides general information and software tools for tax preparation; however, it does not offer personalized tax, legal, or professional advice. It's recommended to consult with a qualified professional for specific advice related to your financial situation.