W-2 vs 1099：主要税务差异
The Fundamental Difference
W-2 employees have taxes withheld from each paycheck by their employer, who also pays half of FICA taxes (7.65%). 1099 independent contractors receive their full pay without any tax withholding and are responsible for paying both halves of FICA (15.3%) as self-employment tax. This fundamental difference means a $100,000 salary as a W-2 employee and $100,000 in 1099 income produce very different after-tax results — the 1099 worker pays approximately 7.65% more in FICA taxes alone.
Tax Obligations for Each Classification
W-2 employees: Employer withholds federal income tax, Social Security (6.2%), Medicare (1.45%), and state tax from each check. At year-end, you receive a W-2 and reconcile withholding vs actual tax on your 1040. 1099 contractors: No withholding at all. You must calculate and pay quarterly estimated taxes covering both income tax and self-employment tax. At year-end, you receive 1099-NEC forms from each client and report all income on Schedule C.
Deductions Available to 1099 Workers
1099 contractors can deduct ordinary and necessary business expenses directly against their income on Schedule C, reducing both income tax and self-employment tax. Common deductions: home office, vehicle mileage (67 cents per mile in 2026), health insurance premiums, retirement contributions, equipment and supplies, professional development, internet and phone, and a portion of meals. W-2 employees generally cannot deduct unreimbursed business expenses, making this a major advantage of 1099 status.
Benefits and Protections Comparison
W-2 employees typically receive: employer-sponsored health insurance (often subsidized), paid time off, 401(k) with employer match, workers' compensation, unemployment insurance, and FLSA protections (minimum wage, overtime). 1099 contractors are responsible for: purchasing their own health insurance (deductible), funding their own retirement (Solo 401(k) or SEP IRA), no paid time off, no unemployment benefits, and no FLSA protections. Contractors should factor these costs into their rates.
Worker Classification Rules
The IRS and Department of Labor use multi-factor tests to determine whether a worker is properly classified as an employee or contractor. Key factors: behavioral control (who directs how work is done), financial control (who bears profit/loss risk), and relationship type (permanency, benefits, integral work). Misclassifying employees as contractors can result in back taxes, penalties, and interest. If you're unsure about your classification, consult an employment attorney or file Form SS-8 for an IRS determination.