Can I Use My Partnership LLC EIN After Changing to a Single-Member LLC?

If your LLC was taxed as a partnership and now has only one owner, it becomes a single-member LLC (SMLLC).

In this case, the IRS treats it as a new tax entity, so you generally must apply for a new EIN.

This applies when:

• You went from 2+ members → 1 member
• The LLC is now a disregarded entity (default SMLLC)
• Or you’ll file as a sole proprietor

👉 Old partnership EIN ❌ cannot usually be reused.

✅ When You May Keep the Same EIN

You can usually keep the EIN only if:

• You elect to be taxed as a corporation (C-Corp or S-Corp), and
• The business structure continues without liquidation

Example:

Partnership → Single owner → Files Form 8832 to be taxed as C-Corp

➡️ Then EIN may stay the same.

📌 Most Common Scenario (What Usually Happens)

In real life, most people do this:

Partnership LLC → Single member → Default tax status

= Treated as sole proprietorship

➡️ New EIN required ✅

⚠️ Important Warning

Using the old partnership EIN after conversion can cause:

• ❌ Tax return rejection
• ❌ IRS mismatch notices
• ❌ Payroll/1099 problems
• ❌ Banking compliance issues

So it’s better to fix it early.

✅ What You Should Do Now

If you’ve already changed to single member:

1. Apply for new EIN (free, online)
2. Update:

• • Bank
  • IRS records
  • Payroll
  • Stripe/PayPal/etc

3. File final partnership return (if not done yet)

Updated on: 06/02/2026