An ITIN (Individual Taxpayer Identification Number) is a tax processing number issued by the IRS to individuals who need to file U.S. taxes but don’t qualify for a Social Security Number. According to the IRS, over 4.5 million ITINs are issued annually, with many going to foreign entrepreneurs starting U.S. businesses. Understanding how ITINs work with LLCs helps non-resident entrepreneurs navigate U.S. tax compliance and business operations without unnecessary delays.

What Is an ITIN and How Does It Relate to LLCs?

An ITIN is a nine-digit number starting with “9” that the IRS uses to track tax filings from individuals without Social Security Numbers. It applies to you as a person, not your business entity. Your LLC itself doesn’t use an ITIN, it uses an EIN (Employer Identification Number) instead.

Here’s where it gets practical. If you’re a non-U.S. resident forming an LLC, you’ll need an EIN for your company. But you might also need an itin number for llc tax purposes if you have U.S.-sourced income that flows through to you personally.

When Non-Resident LLC Owners Need an ITIN

You need an ITIN if your LLC generates income that requires personal tax reporting. Single-member LLCs are pass-through entities. Income passes directly to you, the owner. If that income comes from U.S. sources, you must file a U.S. tax return, and that requires an ITIN if you don’t have an SSN.

Multi-member LLCs work similarly. Each member reports their share of income. Foreign members without SSNs need ITINs to file correctly.

Do You Need an ITIN Before Forming Your LLC?

No. You can form an LLC in any U.S. state without an ITIN. Delaware, Wyoming, and other states don’t require SSNs or ITINs to file formation documents. You only need personal identification and a registered agent.

After formation, you’ll apply for an EIN from the IRS. That process doesn’t require an ITIN either. The ITIN becomes necessary later, when you file your first tax return showing U.S. income.

The Timeline That Actually Matters

Form your LLC first. Get your EIN second. Apply for your ITIN when you have a tax filing requirement. Don’t wait until the last minute before tax deadlines, though. ITIN applications can take 7 to 11 weeks to process.

How to Apply for an ITIN as an LLC Owner

You submit Form W-7 to the IRS along with your tax return and identity documents. The IRS needs proof of your foreign status and identity. That means original documents or certified copies, passports, national ID cards, or birth certificates.

Complete Form W-7 (Application for IRS Individual Taxpayer Identification Number)
Attach your federal tax return (usually Form 1040-NR for non-residents)
Include original identity documents or certified copies
Mail everything to the IRS address listed in the W-7 instructions

Or use an IRS-authorized Certifying Acceptance Agent. They verify your documents without you mailing originals. This speeds things up and reduces risk of lost paperwork.

Common ITIN Mistakes That Delay LLC Operations

Many entrepreneurs confuse ITINs with EINs. They’re not interchangeable. Your LLC needs an EIN to open a bank account, hire employees, and operate legally. Your ITIN is for personal tax filing only.

Another mistake: letting your ITIN expire. ITINs expire after three years of not being used on a tax return. If yours expires, you’ll need to renew it before filing. That causes unnecessary delays.

Conclusion

For non-resident LLC owners, understanding the difference between ITINs and EINs is essential for smooth business operations and tax compliance. Your LLC needs an EIN to operate legally, while you personally need an ITIN to report U.S.-sourced income if you don’t have a Social Security Number. Apply for your ITIN only when a tax filing requirement arises, use certified documents or a Certifying Acceptance Agent to avoid delays, and keep your ITIN active to prevent unnecessary processing issues. Proper planning ensures your LLC runs smoothly without tax complications.

ITIN Number for LLCs: Everything Entrepreneurs Should Know