IRS.com

EIN (Tax ID) Numbers.

Learn about EIN (Tax ID) numbers in 2026 — how to apply, who needs one, and key rules. Expert CPA guidance. IRS.com is not affiliated with IRS.gov.

verifiedVerified Guidance

Lead Editor

person

Jacob Dayan

CPA

scheduleUpdated May 3, 2025
calculate

Refund Estimator

Calculate your potential tax refund based on your income and withholdings.

Start Calculatingarrow_forward
account_balance

Tax Bracket Calculator

See where you fall in the current IRS tax brackets for single and joint filers.

View Ratesarrow_forward

Essential Tax Topics

Expert-reviewed articles covering every phase of your tax journey.

Life Events

Taxes change when life does. Find guides for every major milestone.

Frequently Asked Questions

Quick answers to common ein (tax id) numbers inquiries.

You can apply for an EIN online at IRS.gov/EIN at no cost. According to IRS Publication 1635, your EIN is issued immediately once your application information is validated. The IRS warns taxpayers to beware of third-party websites that charge for this free service. You may also apply by fax or mail using Form SS-4, or by phone at 267-941-1099 if your principal business is located outside the United States or U.S. territories.
shield

IRS-Sourced

Data

workspace_premium

Expert

Authors

sync

Updated

Regularly