What Is Medicare Wages and Tips? Key Facts Explained

What Are Medicare Wages and Tips?

Medicare wages and tips refer to the total amount of employee compensation subject to Medicare tax under the Federal Insurance Contributions Act (FICA). These earnings are crucial for payroll professionals and employees to understand, as they determine the amount of Medicare tax withheld. Medicare wages are reported in Box 5 of the Form W-2. Unlike Social Security wages, Medicare wages are not subject to an annual cap, so all eligible earnings are taxed regardless of total yearly compensation.

Medicare wages encompass a range of income types, including:

• Regular salary and hourly pay
• Overtime earnings
• Bonuses, commissions, and cash awards
• Taxable fringe benefits
• Reported tips of $20 or more per month, per employer
• Employee retirement contributions such as 401(k) and 403(b) deferrals

For a deeper understanding of how income affects your Medicare status and premiums, you may also wish to read What Is Modified Adjusted Gross Income for Medicare?.

Key Inclusions and Exclusions

What’s Included in Medicare Wages?

Employers must include all compensation for services performed by an employee unless specifically exempt. Key inclusions are:

• Base compensation: Salary, hourly wages, overtime, holiday, and paid time off
• Bonuses & commissions: All cash performance awards and incentive commissions
• Taxable fringe benefits: Non-cash benefits added to payroll, like personal use of a company car
• Reported tips: Employees are required to report cash and charged tips totaling $20 or more per month; these are included in Medicare wages and are subject to tax withholding
• Employee contributions to 401(k) and 403(b): While deferred from federal income tax, these contributions are still subject to Medicare tax

Exclusions from Medicare Wages

Despite the broad scope, some types of compensation are excluded by regulation:

• Section 125 cafeteria plan deductions: Employee-paid health, dental, or vision insurance premiums, and contributions to flexible spending accounts (FSAs), reduce Medicare wages
• Employer non-taxable fringe benefits: Certain qualified transportation benefits or insurance provided fully by the employer
• Other employer-paid benefits: Life insurance under a certain threshold, dependent care assistance, and some education assistance plans

Retirement plan contributions like 401(k) and 403(b) do not reduce Medicare wages-even though they reduce wages for federal income tax. It’s important to distinguish the impact of these exclusions, especially when reviewing your How to Get Medicare eligibility and planning employer payroll deductions.

How Pre-Tax Deductions Affect Medicare Wages

Understanding pre-tax deductions is vital for accurate payroll processing and individual tax planning. While some deductions lower taxable wages for Medicare purposes, others do not. The critical differentiator is whether the deduction falls under a Section 125 cafeteria plan.

Section 125 Pre-Tax Deductions

• Health, dental, and vision premiums
• Medical and dependent care FSA contributions

Only these deductions are subtracted from gross pay before calculating Medicare wages. Other pre-tax contributions, including 401(k) and 403(b) deferrals, are not subtracted.

Calculation Example

Employee: $90,000 annual salary
Section 125 pre-tax health plan: $3,000
401(k): $5,000

Medicare wages: $90,000 – $3,000 = $87,000

This calculation means Box 5 often shows higher wages than Box 1 of the W-2, which excludes both Section 125 and 401(k) contributions. For more about wage calculations, check out state-specific guidance such as South Carolina Medicare Supplement Plans for 2026: Rates & Coverage.

Understanding the Medicare Tax Rate

The standard Medicare tax rate is 1.45% on all Medicare wages, with no annual limit. The employer matches this amount, creating an effective 2.9% total Medicare tax. Here’s how it works:

• Employees: 1.45% of Medicare wages withheld from every paycheck
• Employers: 1.45% of Medicare wages contributed on the employee’s behalf
• Self-employed individuals: Responsible for both the employee and employer portions (2.9%) as part of the self-employment tax

There is no wage cap, unlike Social Security tax, which is capped at $176,100 in 2025. For more context on payroll and tax calculations, the Medicare Supplement Plans Wisconsin: Coverage and Enrollment resource may be a helpful adjunct.

What is the Additional Medicare Tax?

High earners are subject to an extra 0.9% surtax known as the Additional Medicare Tax on compensation above specific thresholds:

• $200,000 for single filers, heads of household, and qualifying widows/widowers
• $250,000 for married couples filing jointly
• $125,000 for married filing separately

Employers are required to begin withholding the Additional Medicare Tax once an individual’s wages surpass $200,000 for the year, regardless of their known marital or tax filing status. It is the employee’s responsibility to reconcile any additional liability or overpayment on Form 8959 when they file their tax return. The employer’s matching portion is not subject to this extra 0.9%.

For instance, an employee earning $5,000 per biweekly period and having surpassed $200,000 in year-to-date earnings will see the following Medicare tax on the excess:

• 1.45% standard Medicare withholding
• 0.9% Additional Medicare Tax on amounts above $200,000

Example for a High Earner

If you earn $5,000 biweekly and your year-to-date wages just surpassed $200,000, the portion over $200,000 is subject to a combined 2.35% (1.45% + 0.9%) withholding rate.

For employees or payroll professionals in states with unique supplement coverage, further detail is available in the Massachusetts Medicare Supplement Plans Guide 2024.

How Do You Report Medicare Wages and Tips?

Reporting Medicare wages and tips on tax and payroll forms ensures compliance and accurate tax withholding for both employees and employers. The primary form for employer reporting is the W-2:

• Box 5: Total Medicare wages and tips-this comprises gross wages plus all reported tips and taxable deferrals
• Box 6: Total Medicare tax withheld (including the Additional Medicare Tax, if applicable)

Since tips must be reported by the employee to their employer, only reported tips that meet or exceed $20 in a calendar month are included in Box 5. The employer is then responsible for withholding both the employee and employer portions of Medicare tax on these reported tips. Unreported tips, by law, are the responsibility of the employee and may require additional filings such as Form 4137.

Medicare wages often differ from Social Security wages displayed in Box 3, which is capped annually, whereas Box 5 is limitless. For detailed step-by-step instructions and annual changes, consult competent payroll resources or official IRS guidelines.

If you’re considering Medicare enrollment, review our comprehensive How to Get Medicare resource for practical next steps.

Calculation Examples for Medicare Wages

Scenario	Gross Wages	Section 125 Deductions	401(k)	Tips	Medicare Wages	Employee Tax (1.45%)
Basic employee	$90,000	$3,000	$5,000	$0	$87,000	$1,261.50
With tips	$45,000	$0	$0	$5,000	$50,000	$725
Self-employed	Net earnings $10,000	N/A	N/A	N/A	$10,000	$290 (2.9%)
High earner	$5,000 (per pay, >$200k YTD)	$0	$0	$0	$5,000	$72.50 + 0.9% on excess

These examples demonstrate how different compensation structures affect the calculation of Medicare wages and the related employee tax. Employees in specific states can reference guidance tailored to their situation, such as Medicare Supplement Plans Wisconsin: Coverage and Enrollment.

Frequently Asked Questions

• Why is Box 5 higher than Box 1? Because Medicare wages include taxable items like 401(k) and 403(b) deferrals and reported tips that are not included in Box 1 for federal income tax purposes.
• Do employers pay the Medicare tax on tips? Yes, employers must match the 1.45% Medicare tax on all reported tips, the same as for other wages.
• When does withholding for the Additional Medicare Tax begin? The Additional Medicare Tax is withheld on wages exceeding $200,000 in a calendar year, regardless of filing status. Employees reconcile any discrepancies on their tax return using Form 8959.
• How does the Medicare tax apply to self-employed workers? Self-employed individuals pay the full 2.9% rate (employee and employer portions combined) on all net self-employment earnings. For high-earners, the 0.9% Additional Medicare Tax applies to income exceeding the applicable threshold.
• How do reported and unreported tips affect payroll? Employees must report monthly tips of $20 or more to employers; these are included in Medicare wages for tax withholding. Unreported tips are self-declared via Form 4137 and subject to separate FICA tax processing. For more on tip reporting and payroll, stay updated with IRS publications or your payroll provider.
• Is there a cap on Medicare wages? No, all wages subject to Medicare tax are reportable in Box 5, with no maximum. This is in contrast to Social Security wages which are capped annually.

For more answers to specific state-related Medicare wage and insurance questions, you may explore the South Carolina Medicare Supplement Plans or Massachusetts Medicare Supplement Plans guides.