TL;DR
- ✅ W-4: employees give it to the employer, who withholds income tax
- ✅ W-9: contractors give it to the client, who withholds nothing
- ✅ W-4 earns a W-2 in January; a W-9 relationship earns a 1099-NEC
- ✅ Contractors owe self-employment tax and usually pay estimates quarterly
Side by side
| W-4 | W-9 | |
|---|---|---|
| Who fills it out | Employee | Independent contractor or other payee |
| Given to | Your employer | The business paying you |
| Purpose | Sets federal income tax withheld | Provides your taxpayer ID for reporting |
| Taxes withheld | Income tax; employer also withholds Social Security and Medicare | None |
| Year-end form | W-2 | 1099-NEC (generally for $2,000 or more from 2026) |
| Sent to the IRS | No, kept by the employer | No, kept by the client |
What each form means for your taxes
As an employee, your employer takes income tax out of every check according to your W-4, and splits Social Security and Medicare with you. As a contractor, no one withholds anything. You owe income tax plus self-employment tax (about 15.3 percent on net earnings) and are expected to pay quarterly. Read how a W-4 works with freelance income if you do both.
Employee? Get your W-4 numbers — free
Enter your pay and situation to see what to put on each line.
Open the W-4 Calculator →⚠️ Check how you are classified
If a company controls when, where and how you work and supplies the tools, you may really be an employee even if they give you a W-9. Misclassification shifts the cost of payroll tax to you. See the IRS’s Form SS-8 or ask a tax professional.
New hire? Start with how to fill out a W-4 for a new job. For W-2 vs. W-4, see W-4 vs. W-2.
Frequently asked questions
What is the difference between a W-4 and a W-9?
A W-4 is filled out by an employee so the employer knows how much federal income tax to withhold. A W-9 is filled out by an independent contractor or other payee to give the client their taxpayer identification number. Nothing is withheld on a W-9; the contractor pays their own taxes.
Do I fill out a W-4 or W-9 for a new job?
A W-4 if you are an employee (you get a W-2 at year end). A W-9 if you are paid as a contractor or freelancer (you get a 1099).
Does a W-9 withhold taxes?
No. The W-9 only supplies your name, address and taxpayer ID. You owe income tax and self-employment tax and usually make quarterly estimated payments.
Can I be given a W-9 when I should be an employee?
Possibly. Companies sometimes misclassify workers. The IRS looks at behavioral control, financial control and the relationship, not the form. If you think you are misclassified, you can file Form SS-8 with the IRS.
Do I need a W-4 and a W-9 if I have a job and freelance on the side?
Yes, one for each relationship: a W-4 for your employer and a W-9 for any client who asks. Your side income is not withheld on, so use Step 4(c) on the W-4 or quarterly estimates to cover it.
Key terms in this article
Related guides
W-4 vs. W-2: What’s the Difference?
The W-4 sets your withholding; the W-2 reports it. How they connect and how to use your W-2 to fix your W-4.
W-4 for Freelancers, 1099 and Side Gig Income (2026 Guide)
Side income has no withholding, so it shows up as a surprise tax bill. Cover income tax and self-employment tax through Step 4c or quarterly estimates, with worked examples and 2026 due dates.
How to Fill Out a W-4 for a New Job (2026 Step-by-Step)
Starting a new job and staring at a blank W-4? This guide walks you through all 5 steps — including what to do if you have a second job or your spouse works.
How to Fill Out a W-4 Form in 2026: Complete Step-by-Step Guide
Complete walkthrough of all five W-4 steps for 2026 — from filing status to extra withholding, the new OBBBA deductions, common mistakes and when to update.
Run the numbers
Ready to file your taxes?
From $0 · Best for: Complex returns
Start filing →Free + $15 state · Best for: Simple returns
Start filing →W4Calc may receive compensation when you click links to tax software partners. This does not affect our recommendations.