2025 Social Security Wage Base
For 2025, the Social Security Wage Base figures are $176,100 (Wage base limit) and 6.2% (Employee social security tax rate).
Effective 2025-01-01Source: Publication 15 (2025), (Circular E), Employer's Tax Guide (IRS)Verified 2026-09-03
Compared with 2024
| Item | 2024 | 2025 | Change |
|---|---|---|---|
| Wage base limit | $168,600 | $176,100 | +$7,500 (+4.4%) |
| Employee social security tax rate | 6.2% | 6.2% | +0% (+0.0%) |
Who it applies to
Employers and employees subject to Social Security (FICA) tax
What changed this year, and why
The Social Security wage base limit for 2025 is $176,100. This is the maximum amount of an employee's wages subject to Social Security tax. Both the employer and the employee pay Social Security tax, but only on wages up to this limit. Wages earned above this amount in 2025 are not subject to Social Security tax. Medicare tax has no wage base limit. The employee's share of the social security tax is 6.2% of wages up to that limit, and the employer is charged the same rate on the same wages.
Common questions
- What happens to wages above the wage base limit?
- Wages paid above $176,100 in 2025 are not subject to the Social Security tax. Medicare tax still applies to all covered wages with no upper limit.
- Does the wage base limit apply to Medicare tax as well?
- No. The wage base limit applies only to Social Security tax. There is no wage base limit for Medicare tax.
- What is the Social Security tax rate for 2025?
- The social security tax rate is 6.2% each for the employer and the employee, and for 2025 it is charged on wages up to the wage base limit of $176,100. Wages above that limit in the same year carry no further social security tax. Medicare tax is charged separately and has no wage base limit, so it keeps applying above $176,100.
Every amount on this page is a published figure rather than yours. The Social Security wage base headroom takes the number you enter and works it out against them, showing which published figure it used.
Only social security has a wage base
The IRS makes clear that among employment taxes, only social security imposes a cap on taxable wages. Medicare has no such ceiling: every dollar of covered wages is subject to Medicare tax regardless of how much an employee earns in the year. The wage base limit is defined as the maximum wage subject to social security tax for the year. Once an employee's wages reach that cap, no further social security tax is withheld or owed for the rest of the calendar year, while Medicare tax continues to apply to every subsequent payment. Employers figure withholding by multiplying each payment by the employee tax rate for each tax separately, because the two taxes operate under different rules.
So- cial security and Medicare taxes have different rates and only the social security tax has a wage base limit. The wage base limit is the maximum wage subject to the tax for the year.
Publication 15 (2025), (Circular E), Employer's Tax Guide (IRS)
An acquisition does not restart the limit
When a business is acquired through a corporate acquisition that meets certain IRS requirements, the acquiring (successor) employer does not get to start the wage base count over at zero for transferred employees. Instead, wages the predecessor already paid to those employees during the calendar year are treated as if the successor paid them. This means the successor applies the social security wage base by counting the predecessor's payments together with its own. For example, if a predecessor already paid an employee wages up to the cap before the acquisition, the successor would owe no further social security tax on that employee's wages for the rest of the year. The rule prevents employees from having social security tax applied to a second round of wages simply because they changed employers mid-year due to a corporate restructuring.
Successor employer. When corporate acquisitions meet certain requirements, wages paid by the predeces- sor are treated as if paid by the successor for purposes of applying the social security wage base and for applying the Additional Medicare Tax withholding threshold (that is, $200,000 in a calendar year).
Publication 15 (2025), (Circular E), Employer's Tax Guide (IRS)
When the employer pays the employee's share
If an employer voluntarily pays the employee's share of social security and Medicare taxes instead of deducting those amounts from the employee's pay, the IRS treats those tax payments as additional wages to the employee. This means the employer must add the amount of the employee tax payments to the employee's wages and then calculate social security and Medicare taxes on that increased total. Because the newly increased wages themselves trigger additional employee social security and Medicare taxes, the employer must repeat the calculation, creating a second increase in taxable wages and additional taxes owed. This circular computation can substantially raise the employer's total tax cost beyond what the original tax payment appeared to be. Employers who choose to cover the employee's share should consult Revenue Ruling 86-14 and Publication 15-A for detailed guidance on properly figuring the grossed-up wage amount and the resulting tax liability.
Employee's portion of taxes paid by employer. If you pay your employee's social security and Medicare taxes without deducting them from the employee's pay, you must include the amount of the payments in the employ- ee's wages for social security and Medicare taxes.
Publication 15 (2025), (Circular E), Employer's Tax Guide (IRS)
Household employers
Household workers such as nannies, housekeepers, and other domestic service workers are subject to social security and Medicare taxes when they meet a cash wage threshold. If a household employer pays a worker at least $2,800 in cash wages during 2025, those wages become subject to social security and Medicare tax withholding. This means the household employer must withhold the employee's share and pay the employer's share of these taxes on the wages above the threshold. Household employers have options for reporting: they may include taxes for household employees on Form 941, Form 943, or Form 944 if they already file those forms for business employees, or they may report on Schedule H (Form 1040). The wages of household employees are also subject to the same social security wage base limit as other employees, meaning social security tax only applies up to the annual maximum.
Social security and Medicare taxes apply to the wages of household workers you pay $2,800 or more in cash wa- ges in 2025.
Publication 15 (2025), (Circular E), Employer's Tax Guide (IRS)
Who counts as an employee
If someone who works for you is not a common-law employee, you generally do not withhold federal income tax from their pay. However, the law identifies certain categories of workers who, even if they would not qualify as employees under the common-law rules, are treated as employees specifically for social security and Medicare tax purposes. These statutory employees include commission drivers delivering specified goods, full-time life insurance salespersons, homeworkers working with materials furnished by the employer, and traveling salespersons working full-time. For social security and Medicare tax purposes, these workers are subject to the same wage base and rates as common-law employees. This means their wages count toward the annual social security wage base limit just like any other employee's wages would, even though they may not be employees for other tax purposes.
Although the following persons may not be common-law employees, they’re con- sidered employees by statute for social security and Medi- care tax purposes if the conditions under Tests, later, are met.
Publication 15 (2025), (Circular E), Employer's Tax Guide (IRS)
The wage base has to line up on Form W-2 and the employer's payroll return
For 2025, the IRS sets the maximum amount of wages subject to the employee Social Security tax at $176,100. Once an employee's cumulative earnings for the year reach this cap, no further Social Security tax is withheld from their pay, and the employer also stops paying its matching 6.2% share on wages above the limit. Employers must apply the cap consistently on every payroll run so that the year-end total of Social Security wages shown on each employee's Form W-2 agrees with the total Social Security wages reported on the quarterly Form 941. If the two totals diverge, the IRS may flag the return for examination. Tracking the cap correctly also prevents over-withholding from employees who work for more than one employer, though any credit for excess withholding is claimed on the employee's individual income tax return, not through the employer's payroll system.
For 2025, the social security tax rate is 6.2% (amount withheld) each for the employer and employee (12.4% to- tal). The social security wage base limit is $176,100.
Publication 15 (2025), (Circular E), Employer's Tax Guide (IRS)
Withheld social security tax that never reaches the Treasury can cost the responsible person 100%
When employers withhold social security taxes from employees' wages but fail to deposit those amounts with the IRS, they face the trust fund recovery penalty. This penalty equals 100% of the unpaid trust fund tax, meaning the responsible person must pay the full amount that should have been deposited. The withheld social security tax represents 6.2% of employee wages up to the $176,100 wage base limit for 2025, and these funds are held in trust for the federal government. If the IRS cannot immediately collect the unpaid taxes from the employer or business, it can impose the trust fund recovery penalty on any person determined to be responsible for collecting, accounting for, or paying over these taxes who acted willfully in failing to do so. A responsible person can be a corporate officer, partner, accountant, or anyone with authority over payroll tax matters. Unlike other penalties that might be reduced or abated, the trust fund recovery penalty targets the full amount of withheld taxes that never reached the Treasury, making it one of the most severe consequences for payroll tax noncompliance.
Trust fund recovery penalty. If federal income, social security, or Medicare taxes that must be withheld (that is, trust fund taxes) aren't withheld or aren't deposited or paid to the U.S. Treasury, the trust fund recovery penalty may apply. The penalty is 100% of the unpaid trust fund tax.
Publication 15 (2025), (Circular E), Employer's Tax Guide (IRS)
How each figure was verified
Each number below was read from a stored copy of the document named beside it, and checked to occur word for word in the quoted sentence. The digest is of that stored text.
Publication 15 (2025), (Circular E), Employer's Tax Guide (IRS)
- Wage base limit
For 2025, the social security tax rate is 6.2% (amount withheld) each for the employer and employee (12.4% to- tal). The social security wage base limit is $176,100.
- Employee social security tax rate
For 2025, the social security tax rate is 6.2% (amount withheld) each for the employer and employee (12.4% to- tal).