Contractor vs Employee Compensation
Contractors typically need to charge 40-70% more per hour than the equivalent employee hourly rate to achieve comparable take-home pay, because they cover self-employment tax (15.3%), health insurance, retirement, PTO, and business expenses themselves.
Why It Matters
If you're considering switching from employment to contracting (or evaluating a contract offer), comparing the hourly rate to your salary directly is misleading. The hidden costs of self-employment — taxes, benefits, unpaid time off, and expenses — mean a $60/hour contract rate may actually pay less than a $120,000 salary once you account for everything the employer was covering.
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As an employee, your employer pays half your Social Security and Medicare taxes (7.65%), provides benefits worth 20-40% of your salary, and gives you paid time off. As a contractor, you pay the full 15.3% self-employment tax, buy your own health insurance, fund your own retirement, lose paid vacation, and cover business expenses. The calculator adds all these costs to your salary and divides by your actual billable hours to find the minimum contractor rate.
Example
An employee earning $120,000/year with standard benefits has total compensation worth ~$155,000. To match this as a contractor working 1,920 billable hours/year, you need to gross ~$184,000 (adding SE tax and expenses). That's about $96/hour — 66% higher than the naive $57.69/hour you'd get by dividing salary by 2,080 hours.
Resources
Learn how the IRS classifies workers as employees or contractors
IRS guidance on the factors that determine whether a worker is an employee or independent contractor: behavioral control, financial control, and the type of relationship.
Source: Internal Revenue Service (IRS)
Learn how to pay quarterly estimated taxes as a contractor
IRS guide to estimated tax payments for self-employed individuals. Covers who must pay, when payments are due, how to calculate amounts, and penalties for underpayment.
Source: Internal Revenue Service (IRS)
Understand self-employment tax obligations from the IRS
The official IRS page explaining self-employment tax: the 15.3% rate (12.4% Social Security + 2.9% Medicare), who must pay, how to calculate, and the deduction for the employer-equivalent portion.
Source: Internal Revenue Service (IRS)
Frequently Asked Questions
How do contractors pay taxes throughout the year?
Contractors pay estimated taxes quarterly (April 15, June 15, September 15, January 15) using IRS Form 1040-ES. You estimate your annual tax liability and pay roughly 25% each quarter to avoid underpayment penalties.
Unlike employees who have taxes withheld from each paycheck, contractors must calculate and send tax payments four times per year. This includes both income tax and self-employment tax. The IRS expects you to pay at least 90% of your current year tax (or 100% of last year's tax) through estimated payments to avoid penalties. Many contractors set aside 25-30% of each payment received into a separate account for taxes.
How many hours can a contractor actually bill per week?
Most independent contractors bill 30-35 hours per week even if they work 40+. The remaining time goes to finding clients, invoicing, admin, professional development, and gaps between contracts.
A common mistake when calculating contractor rates is assuming 40 billable hours per week, 52 weeks per year (2,080 hours). In reality, contractors lose time to: unpaid vacation and sick days (2-4 weeks), administrative work (5-10 hours/week), business development and marketing (2-5 hours/week), and gaps between contracts. A realistic estimate is 1,500-1,800 billable hours per year for most independent contractors.
What is self-employment tax and how much is it?
Self-employment tax is 15.3% of net earnings — it covers Social Security (12.4%) and Medicare (2.9%). Employees only pay half (7.65%) because their employer pays the other half. The Social Security portion applies to the first $176,100 of earnings in 2025.
When you're employed, you see 7.65% withheld from your paycheck for FICA, and your employer quietly pays another 7.65% on your behalf. As a self-employed contractor, you pay both halves — the full 15.3%. However, you can deduct the employer-equivalent portion (7.65%) when calculating your adjusted gross income, which reduces your income tax slightly. An additional 0.9% Medicare tax applies to earnings above $200,000 for single filers.
Why do contractors need to charge more than their employee hourly rate?
Contractors cover costs that employers pay for employees: the full 15.3% self-employment tax (vs. 7.65% for employees), health insurance, retirement contributions, paid time off, and business expenses. These add 40-70% to the base salary equivalent.
As an employee earning $120,000, your employer pays ~$9,180 in FICA taxes, $12,000+ for health insurance, $4,800 in 401(k) matching, and gives you 20+ days of paid leave worth ~$9,200. That's over $35,000 in hidden compensation. As a contractor, you pay all of this yourself from your hourly rate, plus business expenses like liability insurance, accounting, and equipment.
Key Terms
Next review: 2026-11-01 • Applies to tax year: 2025