
Forming a Limited Liability Company (LLC) and starting a business come with paperwork. One of the first important things you should do is obtain an Employer Identification Number (EIN). Businesses need an EIN to file tax returns, open a business bank account, hire employees, apply for business licenses, and report payroll taxes. But what happens if your EIN has not yet arrived, and your tax deadline is coming up fast?
If you are waiting for your EIN and your taxes are due, no need to panic. There are clear steps you can take to stay compliant and avoid penalties. In this article, we will discuss this matter so you do not have to stress waiting for your EIN.
- An EIN is required for most business tax filings.
- If your EIN has not arrived and taxes are due, file an extension.
- Sole proprietors may be able to file taxes using their SSN.
- Online EIN applications are issued immediately, while mail and fax applications can take several days or weeks.
Can You File Taxes Without an EIN?
This is the biggest question most business owners ask when their EIN has not arrived yet. The simple answer is, it depends on your business structure. The Internal Revenue Service (IRS) requires certain business entities to use an EIN when filing tax returns. Let us break this down clearly:
If You Are a Sole Proprietor
A sole proprietor who does not have employees and is not required to file certain excise or pension plan returns may use their Social Security Number (SSN) instead of an EIN.
Sole proprietors report business income and expenses on Schedule C (Form 1040). This form is attached to your personal tax return. In this situation, your business income is treated as personal income for federal tax purposes. So if you are a one-person business, you do not have employees, and you are not required to file federal employment or excise taxes, you can usually file your tax return using your SSN while waiting for your EIN.
If You Have a Single-Member LLC

By default, a single-member LLC is treated by the IRS as a “disregarded entity.” This means the IRS treats it like a sole proprietorship for federal tax purposes (unless you elected corporate taxation). In this case, you generally report income on Schedule C, and you may be able to use your SSN to file. But if your LLC has employees, files excise taxes, or has elected to be taxed as an S corporation or C corporation, then an EIN is required.
Even if the IRS allows filing with an SSN, many business owners prefer using an EIN to separate personal and business records.
If You Are a Partnership (Multi-Member LLC)
If your business is structured as a partnership, you cannot file your federal tax return without an EIN. Partnerships must file Form 1065 (U.S. Return of Partnership Income). This form requires an EIN, and there is no option to use a SSN instead.
If your EIN has not arrived and your partnership return is due, your best option is to file Form 7004 to request an automatic extension of time to file. Do not wait until the deadline passes. File the extension before the due date to avoid failure-to-file penalties.
What Should You Do While Waiting for Your EIN?
Focus on how to stay compliant. The IRS cares more about whether you took timely action than whether your paperwork was completely finalised. Now, let us look at the first and most important actions you should take:
1. File an Extension Before the Deadline
Do not miss the tax deadline. If your EIN has not arrived and you cannot file your return, your safest move is to file a tax extension. The IRS allows businesses to request an automatic extension of time to file.

- Sole proprietors and single-member LLCs can file Form 4868 for personal tax returns.
- Partnerships or multi-member LLCs can file Form 7004 for an automatic extension.
An extension gives you more time to file your return, usually six months. If you expect to owe taxes, you should estimate the amount and pay it by the original deadline to avoid penalties and interest.
2. Estimate and Pay What You Owe
Even if your EIN has not arrived, you should calculate your estimated tax liability. The IRS charges failure-to-file penalties (generally 5% of the unpaid tax per month, up to 25%), failure-to-pay penalties (typically 0.5% per month), and interest on unpaid taxes.
To reduce penalties, if possible:
- Estimate your income.
- Calculate your expected tax.
- Pay as much as you reasonably can by the deadline.
3. Contact the IRS If Necessary
If your EIN application is delayed beyond normal processing times, you can contact the IRS Business and Speciality Tax Line at 800-829-4933. Before reaching out, prepare important documents and details, including your legal business name, the date you applied, the method of application (online, fax, or mail), and a copy of your SS-4 form. If your application was never processed, you may need to resubmit Form SS-4.
Why Has Your EIN Not Arrived Yet?
The IRS issues EINs in different ways depending on how you applied:
Online Application
If you applied online through the official IRS website, your EIN will be issued immediately by the end of the session. The IRS states that online EIN applications provide instant confirmation. If you did not receive it:
- The session may have timed out.
- There may have been an error.
- The application may not have been completed.
Other Methods of Application:
- Fax Application: If you applied by fax, the IRS generally processes it within four business days. But delays can still happen during busy periods.
- Mail Application: If you mailed your Form SS-4, processing can take four weeks or more, depending on IRS workload.
- Third-Party or Formation Service: If you hired a company to apply on your behalf, delays can happen if:
- The information was incomplete.
- There were errors in your formation documents.
- The service has not submitted the application yet.
Final Words
Waiting for your EIN while tax deadlines approach can feel stressful. But this situation is manageable if you act quickly and follow the correct steps. What matters most is not ignoring the deadline. File an extension if necessary, pay what you can, and communicate with the IRS if needed.
This article provided simple information on what you should know and what you can do. For a deeper understanding, the IRS website provides clear instructions for EIN applications, extensions, and payments. The Small Business Administration (SBA) also offers helpful guidance for new entrepreneurs.