What is the most common deduction on a person's pay stub?

The most common deduction on a person's pay stub is typically federal income tax withholding. This deduction is based on the employee's earnings, tax filing status, and allowances claimed on their W-4 form. Other common deductions may include Social Security and Medicare taxes, but federal income tax is usually the most significant. Additionally, some employees may have deductions for state income tax, health insurance, or retirement contributions.