How do pre-tax deductions like 401(k) contributions affect tax withholding? 

Pre-tax deductions, such as 401(k) contributions, are amounts taken from an employee’s gross pay before federal income tax is calculated. These deductions help lower taxable income, allowing employees to save for retirement while reducing the amount of tax withheld from each paycheck. 

How It Works 
When an employee contributes to a 401(k) plan, the contribution is subtracted from their gross wages before taxes are applied. This means taxes are calculated only on the remaining income. 
For instance, if an employee earns $3,000 in gross pay and contributes $300 to a 401(k), taxes are based on $2,700 instead of $3,000. 

Impact on Taxes 

• Federal Income Tax: Reduced taxable income leads to lower federal tax withholding. 

• Social Security and Medicare Taxes: These deductions generally do not reduce FICA (Social Security and Medicare) taxes, meaning they are still calculated on the full gross pay. 

• State Income Tax: In most states, pre-tax deductions also lower taxable income for state withholding. 

Using SecurePayStubs 
When generating a pay stub through SecurePayStubs, enter 401(k) or other pre-tax deductions under the Deductions section. The system will automatically adjust the taxable income and calculate accurate withholdings to reflect the correct tax impact.