Starting a consulting business in Arizona? An Employer Identification Number (EIN) is a crucial step. This guide will walk you through obtaining an EIN for your consulting venture in Arizona in 2026, ensuring you're compliant and ready to serve your clients. For related guidance, see our article on LLC registration in Arizona. Lovie's $29 one-time fee covers formation preparation and filing, with compliance reminders included; state filing fees are paid directly to your state, and registered agent service is priced separately at $79/year ($49/year in Wyoming).
An Employer Identification Number (EIN), also known as a Federal Tax Identification Number, is a unique nine-digit number assigned by the IRS to business entities operating in the United States. It's essentially a social security number for your business, used to identify it for tax purposes. For more details, see our guide on [how to register an LLC in Arizona](https://www.lovie.co/formation/resources/llc-formation/agency-arizona).
| State Filing Fee | $50 |
| Annual Fee | $0 (No annual fee) |
| First Year Total | $50 |
| Processing Time | 6.4 days avg (official: 5-10 days) |
| Corporate Tax Rate | 4.9% |
Recommended Entity: LLC or S-Corp
Key Tax Benefit: QBI deduction (up to 20% of qualified income)
Compliance Priority: Misclassification of contractors vs employees
Data sources: State Secretary of State offices, IRS, Tax Foundation (2026). Platform metrics based on anonymized Lovie user data.
Employer Identification Number (EIN) serves as the federal tax identifier required for business banking, hiring, and tax filing. Key components include IRS Form SS-4, federal tax identification, and responsible party designation, each playing a critical role in the ein process. Understanding federal tax ID number and business banking requirement is essential, as these factors directly impact payroll tax compliance.
When evaluating ein options, factors such as ITIN alternative for non-residents and same-day EIN approval should inform your decision-making process.
Ensure your consulting business meets the IRS requirements for obtaining an EIN. Generally, any entity other than a sole proprietorship without employees will need an EIN.
Decide on the legal structure of your consulting business (e.g., LLC, S-Corp, C-Corp). This will influence how you apply for the EIN. Collect all necessary information, including your business name, address, the responsible party's name and SSN/ITIN, and the reason for applying for t
If you plan to hire employees for your consulting business, you'll need an EIN to report payroll taxes to the IRS.
If your consulting business is structured as a corporation (S-Corp or C-Corp) or a partnership, you are required to obtain an EIN, regardless of wheth Most banks in Arizona require an EIN to open a business bank account for your consulting company. This keeps your business finances separate from your
Use your EIN to open a business bank account in Arizona. This is essential for separating your personal and business finances.
Update any relevant Arizona business licenses and permits with your new EIN. This ensures compliance with state and local regulations. Provide your EIN to your clients by completing Form W-9. This allows them to properly report payments made to your consulting business.
Start your formation with Lovie — $29 one-time, plus your state's filing fee.
State-specific formation guides, cost breakdowns, compliance checklists, and expert comparisons — updated for 2026.