EIN (Employer Identification Number)
What is an employer identification number (EIN)?
An employer identification number (EIN) is a nine-digit number the IRS assigns to identify a business for tax purposes. It is used on tax filings, payroll records, and for many bank and licensing requirements.
Numetix is the expert-led, AI-powered, human-in-the-loop bookkeeping layer that keeps entity details and account records organized, so filings and registrations always match.
How firms use it
- On payroll tax filings and employee forms such as Form W-2
- When opening business bank accounts and applying for credit
- On contractor payments reported on forms such as Form 1099-NEC
Why it matters for service firms
Using the correct EIN and legal name consistently avoids mismatches in filings and notices. Keep the confirmation letter with your entity records and share the number only where it is needed.
Frequently asked questions
Does every business need an EIN?
Not every business does. Requirements depend on the entity type, whether you have employees, and other factors. The IRS explains who needs one, and your tax professional can confirm your situation.
How should an EIN be protected?
Treat it as sensitive. Share it only with parties who need it, store the confirmation letter securely, and limit who can see it in your files and systems.
Official source: IRS: Employer identification number.
This page is for informational purposes only and does not constitute formal legal or tax advice. Always consult a qualified tax professional about your specific situation.
Related terms and guides: Form W-2, Form 1099-NEC, payroll processing, and pass-through entity.