No, an EIN cannot be transferred to a new owner. The IRS assigns each Employer Identification Number to one specific entity for life, and that number stays with that entity even if the business closes, changes hands, or reorganizes. In most ownership changes, the new owner has to apply for a fresh EIN. A handful of situations let the existing number stay in place, and knowing which side of that line your deal falls on is what matters.
Why an EIN Doesn’t Move With Ownership
An EIN identifies an entity to the IRS, not a person or a set of assets. Once issued, it’s permanently tied to the entity it was assigned to. When ownership changes, the question the IRS asks isn’t “who owns this now” but “is this the same entity that was issued the number.” If the answer is yes, the EIN stays. If the answer is no, whoever is running the new entity applies for their own.
That framing explains most of the outcomes below. It also explains why trying to “transfer” an EIN informally, by simply using someone else’s number, causes serious problems: the IRS’s records still tie that number to the original owner and the original tax history.
Buying a Business: Stock Purchase vs. Asset Purchase
The structure of the acquisition controls the EIN outcome, and the two common structures give opposite answers.
In a stock purchase, the buyer acquires ownership shares of the target company. The company itself continues as the same legal entity, just with new owners on the shareholder list. Because the entity’s identity doesn’t change, the target keeps its existing EIN. The buyer becomes the new owner of a business the IRS already recognizes.
In an asset purchase, the buyer acquires equipment, inventory, contracts, and other assets, but not the legal entity itself. The buyer is running a different business with those assets, so a new EIN is required for those operations. The seller keeps the original EIN to wrap up remaining obligations, including final tax returns.1Internal Revenue Service. When to Get a New EIN
If you’re a sole proprietor who buys an existing business and plans to run it as a sole proprietorship, you need a new EIN for that business as well.1Internal Revenue Service. When to Get a New EIN
Mergers
In a corporate merger, the surviving corporation keeps its EIN. When two companies combine to form a brand-new corporation, that new entity needs a new EIN.1Internal Revenue Service. When to Get a New EIN The test is whether an existing entity survives the transaction or something new comes out of it.
Inheriting a Business
When a sole proprietor dies, the EIN effectively dies with them. A sole proprietorship isn’t a separate legal entity, so the EIN was assigned to the owner personally. If the estate continues operating the business, the estate administrator has to obtain a new EIN for those operations.1Internal Revenue Service. When to Get a New EIN The administrator is also responsible for reporting wages or income under the new EIN and paying taxes owed.2Internal Revenue Service. Responsibilities of an Estate Administrator
Corporations and LLCs work differently. The entity exists separately from its owners, so the death of a shareholder or member doesn’t affect the EIN. Ownership passes through the operating agreement, bylaws, or estate, and the entity keeps its number.
Changes That Don’t Require a New EIN
Some changes look like they’d trigger a new number but don’t, because the underlying federal tax identity of the entity hasn’t changed:
- Renaming the business or moving to a new address.
- A corporation declaring bankruptcy.
- A corporation electing S corporation tax treatment.
- The corporation that survives a merger.
- A state-level conversion where the federal tax classification stays the same.
- Converting a partnership to an LLC that’s still taxed as a partnership.
These stay with the existing EIN because the IRS is looking at federal tax identity, not the label a state uses.1Internal Revenue Service. When to Get a New EIN
Single-member LLCs sit in their own category. The IRS treats them as disregarded entities by default, so if you already have a sole proprietor EIN, you can use that same EIN for your single-member LLC — as long as you don’t elect corporate or S corporation tax treatment, don’t have employees, and don’t owe excise tax. Hiring your first employee or electing corporate treatment ends that arrangement and a separate EIN becomes necessary.1Internal Revenue Service. When to Get a New EIN
What the New Owner Actually Does
If a new EIN is required, apply using IRS Form SS-4. The online application issues the number immediately upon completion. Fax applications typically return an EIN within four business days, and mailed applications take about four weeks.3Internal Revenue Service. Instructions for Form SS-4 The IRS limits each responsible party to one EIN application per day.4Internal Revenue Service. Get an Employer Identification Number
The application asks for a “responsible party,” meaning the individual who ultimately owns or controls the entity or its funds. For a corporation, that’s the principal officer; for a partnership, a general partner; for a trust, the grantor or trustee; for an estate, the executor or administrator. It must always be a person, not another entity.3Internal Revenue Service. Instructions for Form SS-4
If your situation is one where the EIN doesn’t change but ownership or management does, you still need to update the IRS. Form 8822-B updates business address, location, or responsible party information. The responsible party change has a hard deadline: file within 60 days of the change.5Internal Revenue Service. About Form 8822-B, Change of Address or Responsible Party – Business Filing 8822-B doesn’t transfer the EIN. It updates the IRS’s records about who to contact. Processing takes four to six weeks.6Internal Revenue Service. Form 8822-B, Change of Address or Responsible Party – Business
Successor Employer Wage Credits
Even though the EIN itself doesn’t come with the business, employees who move with an acquisition aren’t double-taxed on payroll. Under IRC §3121(a)(1), when a company acquires substantially all the property of another business and immediately employs the predecessor’s workers, the acquiring company can count wages the predecessor already paid toward that year’s Social Security wage base.7Office of the Law Revision Counsel. 26 USC 3121 – Definitions Without that rule, employees caught in a mid-year deal would restart the wage base at zero under the new EIN.
The same logic applies to FUTA. Federal unemployment tax applies to the first $7,000 paid to each employee per year, and a qualifying successor employer can credit the predecessor’s wages toward that cap rather than starting over.8Internal Revenue Service. Topic No. 759, Form 940 – Employers Annual Federal Unemployment (FUTA) Tax Return To qualify, the acquirer must take over substantially all of the predecessor’s trade or business property and immediately employ the predecessor’s workers.
What Happens to the Old EIN
The IRS never cancels an EIN. It permanently belongs to the entity it was issued to. If the business has closed and the number is no longer needed, you can ask the IRS to deactivate the account by sending a letter with the entity’s EIN, legal name, address, and reason for deactivating, mailed to the IRS in Kansas City, MO or Ogden, UT. Before deactivation, all outstanding returns must be filed and all taxes paid.9Internal Revenue Service. If You No Longer Need Your EIN
That closure process is why informal “EIN transfers” cause trouble. A buyer using a seller’s EIN inherits the seller’s tax history in the IRS’s records without inheriting any of the legal authority to act for that entity. The clean path, in almost every ownership change, is a new EIN for the new business and a proper wind-down of the old one.