1099 vs. W-2 US Tax & QBI Deduction Calculator (2026)

1099 vs W-2 Tax Calculator 2026: The Real Cost of Freelancing vs Employment

A client offers you $120,000 as a 1099 contractor. Your current W-2 job pays $100,000. The contractor role pays 20% more — obvious choice, right? Wrong, and it is not close. As a 1099 worker you pay both halves of Social Security and Medicare (15.3% up to $184,500, versus 7.65% as an employee), you get zero employer health insurance, zero 401(k) match, zero paid time off — and you owe quarterly estimated taxes instead of painless withholding. The honest breakeven is roughly 25–30% above the W-2 salary. That $120,000 contract needs to be $128,000+ to match your $100,000 job.

Self-employment tax is the line item that shocks every new freelancer. Employees split FICA with their employer: 6.2% Social Security + 1.45% Medicare each. Contractors pay all of it: 12.4% + 2.9% = 15.3% on the first $184,500, plus 2.9% Medicare beyond that. There is a small mercy — you deduct half the SE tax from your income tax — but the net effect is still roughly 7–8% more tax on the same income. On $100,000 of profit, that is about $7,000 extra that your W-2 colleague never sees. The calculator shows this side by side so the comparison is honest.

But the tax story has a second act: deductions employees cannot touch. Contractors deduct the home office (simplified: $5/sq ft up to $1,500), health insurance premiums (100% deductible — often $6,000–$12,000/year), half of SE tax, business travel, equipment, software, professional development, and retirement contributions far beyond employee limits (SEP-IRA up to 25% of profit, ~$69,000 in 2026). A disciplined contractor with $120,000 in revenue and $25,000 in legitimate deductions is taxed on $95,000 — while the W-2 worker is taxed on nearly the full $100,000 with only the standard deduction. Deductions do not erase the SE tax penalty, but they narrow it substantially.

The benefits gap is where W-2 quietly wins back ground. Employer health insurance is worth $7,000–$20,000/year depending on family size — and it is pre-tax. A 401(k) match of 4–6% on $100,000 is $4,000–$6,000 of free money. Paid time off: 15 vacation days + 10 holidays = 25 paid days, worth roughly $9,600 on a $100k salary. Add disability insurance, life insurance, and FSA/HSA access, and total W-2 compensation often runs 25–40% above the salary number. Contractors must buy all of this retail. When you compare, compare total compensation — not salary to contract rate.

Quarterly estimated taxes are the administrative reality nobody warns you about. No employer withholds for you, so you pay the IRS four times a year (April, June, September, January) — and underpaying triggers penalties. The safe harbor: pay 100% of last year's tax (110% if you earned over $150,000) across the four quarters and you owe no penalty regardless. Open a separate "tax" savings account and transfer 25–30% of every payment received, immediately, before you touch it. The freelancers who go broke at tax time are not the ones who earned too little — they are the ones who spent the IRS's money.