W-2 vs 1099 vs C2C: Worker Classification Explained for Employers and Consultants

In IT staffing and consulting, three terms come up in almost every conversation: W-2, 1099 and C2C. Each describes a different working relationship with different tax, benefit and compliance implications.

This article provides general information only. Classification depends on specific facts, so employers and consultants should consult qualified tax, legal or HR professionals.

W-2 employment

A W-2 worker is an employee. The employer:

• Withholds federal, state and local income taxes
• Withholds and pays the employer share of Social Security and Medicare
• Pays federal and state unemployment taxes
• Provides workers' compensation coverage and may offer benefits such as health insurance and paid time off
• Issues a Form W-2 at year end

In staffing, a consultant may be a W-2 employee of the staffing firm while working on a client project.

1099 independent contractors

A 1099 worker is an independent contractor who runs their own business. The company paying them generally:

• Does not withhold income or payroll taxes
• Does not provide employee benefits
• Reports payments on Form 1099-NEC when required

The contractor pays self-employment tax and manages their own benefits and expenses.

Corp-to-corp (C2C)

In a C2C arrangement, the consultant works through their own corporation or LLC. The staffing firm or client contracts with that business entity, which invoices for services. The consultant's company is responsible for its own payroll, taxes and insurance.

C2C is common for experienced independent consultants. Some clients and staffing firms accept only W-2 consultants, while others accept C2C.

Why classification matters

Misclassifying employees as independent contractors can lead to back taxes, penalties, unpaid overtime claims and benefits liabilities. Regulators look at the actual relationship, not just the contract label. Factors often include:

• Behavioral control: who controls how, when and where the work is done
• Financial control: who invests in tools, bears the risk of profit or loss and sets rates
• Relationship: whether the work is ongoing, central to the business and comes with benefits

The IRS, the Department of Labor and individual states may apply different tests, and some states use stricter standards than others.

Work authorization is a separate question

Classification and work authorization are different issues. Employers must complete Form I-9 for employees, and sponsored workers such as H-1B employees must be employed under the terms of their approved petitions. Staffing firms should coordinate with immigration counsel on these matters.

Best practices for staffing firms

1. Document the classification decision for every engagement.
2. Verify the business status and insurance of C2C vendors.
3. Track work authorization and expiration dates.
4. Review contracts regularly as laws change.
5. Keep payroll, HR and recruiting teams aligned on requirements.

How Click AI Solutions helps

Our payroll and HR services support W-2 employees, contractor payments and the documentation that IT staffing requires. Our staffing team works with consultants across W-2 and C2C models where appropriate.

Contact us to learn how we can support your consulting workforce.