Yes, employers do pay Social Security tax. Federal law requires every employer to pay 6.2% of each employee’s wages, up to an annual cap, entirely out of the business’s own funds. For 2026, that cap is $184,500 per employee, so a single worker can cost an employer as much as $11,439 in Social Security tax before Medicare and other payroll obligations are added.1Social Security Administration. Contribution and Benefit Base The 6.2% the employer pays is separate from, and identical to, the 6.2% withheld from the worker’s paycheck. Together, that’s 12.4% flowing to Social Security on every covered dollar of wages.
The Employer’s 6.2% Share
The employer’s Social Security tax is not a deduction from the employee’s earnings. The business writes its own check to the government for this amount as part of its payroll overhead.2Office of the Law Revision Counsel. 26 USC 3111 – Rate of Tax The obligation applies to all taxable wages paid during the calendar year, up to the wage base.
Once an employee’s earnings for the year cross $184,500, the employer stops owing Social Security tax on any additional wages paid to that worker for the rest of the year. The cap resets every January, and the Social Security Administration adjusts it annually based on changes in average wages nationwide.
Medicare Pushes the True Cost Higher
Social Security tax is only one piece of what an employer owes on wages. Employers also pay a 1.45% Medicare tax on all wages, with no annual cap.2Office of the Law Revision Counsel. 26 USC 3111 – Rate of Tax The combined employer FICA rate is 7.65% on wages up to $184,500, and 1.45% on everything above.3Internal Revenue Service. Publication 15-A (2026), Employer’s Supplemental Tax Guide
When an employee’s wages exceed $200,000 in a calendar year, the employer must also begin withholding an Additional Medicare Tax of 0.9% from that worker’s pay.4Internal Revenue Service. Questions and Answers for the Additional Medicare Tax The employer does not match this extra 0.9%, but the withholding kicks in automatically at $200,000 regardless of the worker’s filing status or outside income.
Which Workers Trigger the Tax
The employer share applies to common-law employees. The IRS looks at whether the business controls what work gets done and how it gets done. If it does, the worker is an employee, whatever the contract says and whether the person works full-time or part-time.5Internal Revenue Service. Employee (Common-Law Employee)
Independent contractors handle their own self-employment taxes, so the hiring business owes no employer FICA on those payments.6Internal Revenue Service. Independent Contractor (Self-Employed) or Employee? Misclassifying employees as contractors to avoid the tax is one of the fastest ways to draw IRS scrutiny, and the back taxes, penalties, and interest can dwarf whatever the business saved.
Family, Students, and Household Workers
A few narrow situations remove the employer’s obligation. Children under 18 who work for a parent’s sole proprietorship, or for a partnership where both partners are the child’s parents, are exempt from Social Security and Medicare taxes.7Internal Revenue Service. Publication 15 (2026), (Circular E), Employer’s Tax Guide The exemption disappears if the business is a corporation or a partnership with non-parent partners. A spouse working in the other spouse’s trade or business is treated like any unrelated employee and owes the tax.
Students employed by the college or university where they’re enrolled can be exempt from FICA if the work is incidental to their coursework; the school makes that call, not the student.8Internal Revenue Service. Student FICA Exception Household employers operate under a different threshold: paying a nanny, housekeeper, or caregiver $3,000 or more in cash wages during 2026 triggers Social Security and Medicare taxes, including the employer share.9Internal Revenue Service. Publication 926 (2026), Household Employer’s Tax Guide Pay less than that to a single household worker, and no FICA is owed by either side.
How Employers Actually Pay It
Most employers report Social Security and Medicare taxes on Form 941, the quarterly federal tax return. Total wages go on line 2 and Social Security tax on line 5a. If total employment tax liability for the year will be $1,000 or less, an employer can request written IRS approval to file Form 944 annually instead.10Internal Revenue Service. Instructions for Form 941 (03/2026)
Filing the form is not the same as paying. Deposits run on a separate schedule set by the IRS based on the employer’s lookback-period liability:
- Employers who reported $50,000 or less in employment taxes during the lookback period deposit monthly, due by the 15th of the following month.
- Employers who reported more than $50,000 deposit on a semiweekly cycle tied to paydays.
- Any employer that accumulates $100,000 or more in tax liability on a single day must deposit by the next business day, and moves to semiweekly status for the rest of the year and the following year.
- If quarterly liability is under $2,500, the employer can pay with Form 941 rather than making separate deposits.
These thresholds cover combined income tax withholding, Social Security, and Medicare.11Internal Revenue Service. Topic No. 757, Forms 941 and 944 – Deposit Requirements All deposits must go through the Electronic Federal Tax Payment System (EFTPS), which provides immediate confirmation that doubles as an audit trail.12Internal Revenue Service. IRS Reminds Employers About the Benefits of EFTPS
What Happens If You Don’t Pay
The IRS does not treat late payroll deposits casually. Penalties scale with how late the money arrives: 2% for deposits 1–5 days late, 5% for 6–15 days late, 10% for more than 15 days, and 15% if the balance is still unpaid 10 days after the first IRS notice.13Office of the Law Revision Counsel. 26 USC 6656 – Failure to Make Deposit of Taxes Interest runs on top of those penalties.
The consequences get much worse when an employer collects the employee half of Social Security and Medicare from paychecks but doesn’t send it to the IRS. Those withheld amounts are trust fund taxes, and responsible individuals inside the company can be personally assessed a penalty equal to 100% of the unpaid tax.14Office of the Law Revision Counsel. 26 US Code 6672 – Failure to Collect and Pay Over Tax, or Attempt to Evade or Defeat Tax Responsible individuals is defined broadly enough to include owners, officers, and anyone with authority over company finances. It is one of the few payroll penalties that reaches past the corporation and lands on people personally.