Social security cap
What is social security cap? A plain-English definition for small business employers — meaning, why it matters, and how it applies to your business.
- Read time2 min read
- Filed underTaxes · 64 terms
- Written byHomebase Team
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Contents7 sections
What is the Social Security cap?
Managing payroll taxes correctly is essential for businesses, and one key factor is the Social Security cap—the maximum amount of an employee’s earnings subject to Social Security tax each year. Once an employee reaches this limit, no additional Social Security tax is withheld for the rest of the year.
For businesses using Homebase payroll, tracking these limits automatically ensures accurate tax calculations and IRS compliance without manual adjustments.
How much is the Social Security tax?
The IRS sets the Social Security tax rate and applies to wages up to the annual cap. As of 2025, the tax rate is:
- 6.2% for employees (deducted from wages)
- 6.2% for employers (matched by the business)
- 12.4% total tax contribution (combined employee and employer share)
This tax funds the Social Security program, which benefits retirees, disabled individuals, and survivors of deceased workers.
2025 Social Security wage cap: What you need to know
The Social Security wage cap for 2025 is $176,100. This means:
- Employees only pay Social Security tax on wages up to $176,100
- Wages earned beyond this cap are not subject to Social Security tax
- Employers only match Social Security contributions up to the cap
How the Social Security cap affects payroll
Once an employee reaches the cap, businesses must adjust payroll tax withholdings. Key considerations include:
- Payroll systems must track year-to-date earnings to stop deductions at the cap.
- Higher-earning employees will see increased take-home pay once Social Security tax no longer applies.
- Medicare tax still applies, as it has no wage cap.
With Homebase payroll, businesses can automate Social Security tax tracking and ensure deductions stop at the right time—helping avoid errors and ensuring compliance.
Social Security tax vs. Medicare tax
Unlike Social Security tax, Medicare tax has no cap, meaning employers must continue withholding it on all wages. The Medicare tax rates are:
- 1.45% for employees and 1.45% for employers (2.9% total)
- Additional Medicare tax of 0.9% applies to employees earning over $200,000 (single) or $250,000 (married filing jointly)
How Homebase simplifies payroll tax compliance
Manually tracking payroll tax limits can be time-consuming, but Homebase payroll makes it easy by:
- Automatically adjusting Social Security withholdings when employees hit the cap
- Ensuring compliance with IRS payroll tax regulations
- Generating payroll reports to help track wages and tax payments
- Providing automatic tax calculations to prevent costly mistakes
Keep going
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