Payroll taxes are the money your employer withholds from your paycheck plus the separate taxes they pay directly to the government

When you see a deduction on your pay stub labeled Social Security or Medicare, that is one part. But your employer also pays a matching amount on your behalf that never appears on your check — you do not see it, but it comes out of what the company spends on you. A third piece is federal and state unemployment insurance, which the employer pays entirely. Together, these are payroll taxes.

The money does not stay with your employer. It goes to the U.S. Treasury, state revenue departments, and unemployment insurance funds. Your Social Security and Medicare contributions build your own future benefits. The unemployment insurance funds pay benefits to workers who lose jobs. Understanding what these taxes are and where they go helps explain why your paycheck is smaller than your salary, and why your employer's cost to hire you is higher than what you take home.

Key Takeaways

  • Employers withhold Social Security (6.2%) and Medicare (1.45%) from your paycheck and pay matching amounts themselves, totaling 15.3% of your wages combined.
  • Your employer also pays federal and state unemployment insurance taxes, which fund benefits for workers who are laid off or fired without cause.
  • The money withheld from your paycheck goes to Social Security and Medicare trust funds; your employer's share goes to the same funds plus unemployment accounts.
  • Self-employed people pay both the employee and employer portions of Social Security and Medicare, which is why their tax burden is roughly double that of wage workers.
  • Payroll tax rates and wage bases (the maximum income subject to tax) change yearly, and some high earners stop paying Social Security tax after reaching the annual cap.

The two parts of Social Security and Medicare taxes

Social Security tax is 6.2% of your wages. Your employer withholds 6.2% from your paycheck and pays another 6.2% directly to the government. That is 12.4% of your salary total. Medicare tax is 1.45% withheld from your check, plus 1.45% paid by your employer — 2.9% total. These percentages have been the same for decades.

There is a cap on Social Security tax. In 2024, you stop paying Social Security tax once your wages reach $168,600 for the year. After that point, no more Social Security tax is withheld, and your employer stops paying their share. Medicare tax has no cap — it applies to all wages, no matter how high. High earners also pay an additional 0.9% Medicare tax on income over $200,000 (single) or $250,000 (married filing jointly), which is withheld from their paycheck only, not matched by the employer.

The money goes into two separate trust funds: the Social Security Trust Fund and the Medicare Trust Fund. When you retire, become disabled, or die, Social Security pays benefits from that fund. When you turn 65 or become disabled, Medicare covers hospital and medical insurance from its fund. Your employer's matching contribution goes into the same funds — there is no distinction between employee and employer money once it arrives.

Unemployment insurance taxes paid entirely by employers

Unlike Social Security and Medicare, unemployment insurance is paid by employers only. You do not see a deduction for it on your paycheck. The employer pays the full amount to the state unemployment insurance fund and, in some cases, a small federal unemployment tax as well.

The state rate varies by state and by industry. Most employers pay between 0.5% and 5.4% of each employee's wages, up to a state-set wage base (often $7,000 to $42,000 per year, depending on the state). A new business typically pays a higher rate; established businesses with few layoffs pay lower rates. The federal unemployment tax (FUTA) is 6% of the first $7,000 of wages per employee per year, but employers receive a credit for state taxes paid, so the net federal rate is usually 0.6%.

When you lose your job through no fault of your own — layoff, business closure, or reduction in hours — you may receive unemployment benefits from this fund. The amount and duration depend on your state and your earnings history. Your employer's unemployment tax rate can increase if many former employees file for benefits, so companies have a financial incentive to contest claims or to avoid layoffs.

Why the employer's cost is higher than your salary

If your salary is $50,000 per year, your employer's actual cost to employ you is roughly $53,825. That extra $3,825 is payroll taxes. The employer pays 6.2% Social Security ($3,100), 1.45% Medicare ($725), and roughly 1% unemployment insurance ($500, though this varies by state and industry). These are mandatory costs that come out of the company's budget, not optional.

This is why employers sometimes negotiate salary rather than benefits — every dollar of salary triggers payroll taxes, but some benefits (like health insurance contributions up to certain limits) do not. It is also why very small businesses sometimes struggle with hiring: the payroll tax burden is proportionally larger when you have few employees and cannot spread the cost across a large payroll.

When you see a job posting that says "salary $50,000," the employer is budgeting for roughly $53,825 in total compensation cost. Understanding this helps explain why raises sometimes come slowly and why employers care about reducing turnover — replacing an employee means paying payroll taxes on a new hire while potentially still paying unemployment benefits to the departing one.

How self-employed people handle payroll taxes

If you are self-employed, you pay both the employee and employer portions of Social Security and Medicare. That is 12.4% Social Security and 2.9% Medicare on your net self-employment income — 15.3% total. You also pay federal self-employment tax, which funds Social Security and Medicare.

Self-employed people file Schedule SE (Self-Employment Tax) with their tax return to calculate what they owe. You pay this tax quarterly through estimated tax payments, not through an employer withholding. The IRS provides Form 1040-ES to help you calculate quarterly payments. You can deduct half of your self-employment tax as a business expense on your tax return, which provides some relief, but the burden is still roughly double that of a wage worker because you are covering both sides.

Gig workers, freelancers, and independent contractors are self-employed for tax purposes, even if they work regularly for one company. They receive a 1099 form instead of a W-2 and are responsible for calculating and paying their own payroll taxes. This is a major difference from being a regular employee — there is no withholding, no employer match, and no unemployment insurance available.

State and local payroll taxes

In addition to federal payroll taxes, many states and some cities collect their own payroll taxes. State income tax is withheld from your paycheck in 41 states and the District of Columbia (nine states have no income tax). The rate varies widely — from roughly 1% to over 13% depending on your income and state.

Some states also collect state disability insurance (SDI) or paid family leave taxes. California, New Jersey, New York, and Rhode Island are the main states with these programs. Employees pay a small percentage (usually under 1%), and employers may pay a portion as well. These funds pay benefits when you take time off for disability, childbirth, or family care.

A few cities — including New York City, Washington D.C., and some others — collect local income tax on top of state and federal taxes. These are withheld from your paycheck the same way federal and state taxes are. Your employer handles all the withholding and remits the money to the appropriate state and local agencies.

When and how employers pay payroll taxes

Employers do not pay payroll taxes once a year. They withhold from each paycheck and remit the money to the IRS and state agencies on a schedule based on how much they owe. Small employers might pay monthly; larger employers pay weekly or even more frequently. The IRS uses a system called EFTPS (Electronic Federal Tax Payment System) to collect these payments.

Employers also file quarterly reports (Form 941) to reconcile what they withheld and paid against what employees actually earned. At the end of the year, employers file annual reports and issue W-2 forms to employees showing total wages and taxes withheld. If an employer fails to pay payroll taxes, the IRS can seize business assets, garnish the owner's personal accounts, and pursue criminal charges in severe cases.

Payroll tax compliance is one of the most heavily enforced areas of tax law because the money belongs to employees and government programs, not to the business. An employer cannot legally use payroll tax money for operating expenses, even temporarily.

Frequently Asked Questions

Why do I pay Social Security tax if I am already paying for Medicare?

Social Security and Medicare are separate programs with different purposes. Social Security provides retirement, disability, and survivor benefits based on your work history. Medicare is health insurance for people 65 and older or those with certain disabilities. Both are funded through payroll taxes, and both build benefits you may receive later. You pay into both because they are distinct programs.

What happens to my payroll taxes if I change jobs?

Your Social Security and Medicare contributions follow you — they are credited to your Social Security account regardless of how many jobs you have. If you change jobs mid-year, your new employer withholds Social Security and Medicare starting from your first paycheck there. If you reach the Social Security wage cap before year-end, you stop paying Social Security tax at your current job, but if you start a new job, that employer will withhold again until the cap is reached. Your W-2 forms from each employer show what you paid at each job.

Can I opt out of paying payroll taxes?

No. Payroll taxes are mandatory for all employees and employers. There are narrow exceptions — some religious groups and certain government employees have different rules — but for standard W-2 employees, there is no option to opt out. Self-employed people must pay self-employment tax on net income over $400.

Do payroll taxes go toward my future benefits or general government spending?

Social Security and Medicare taxes are dedicated to those programs' trust funds. The money is not mixed into general government revenue. However, if a trust fund pays out more than it collects in a given year, it draws from reserves. Social Security and Medicare are separate from income tax, which does go into general government spending.

Why is my employer's unemployment tax rate different from other businesses?

States set unemployment tax rates based on a company's history of layoffs and claims. A business with many former employees filing for benefits pays a higher rate; a business with few claims pays a lower rate. New businesses pay a standard rate until they have a claims history. This system is designed to encourage employers to avoid unnecessary layoffs and to contest fraudulent claims.