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# 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)