An EIN cannot be transferred to a new owner. The nine-digit number the IRS issues is permanently tied to the specific entity it was assigned to, and it stays with that entity for life even if the business closes or changes hands.1Internal Revenue Service. When to Get a New EIN Whether the number keeps being used after an ownership change depends on whether the entity itself survives the transaction, not on whether the owners do.
Why the EIN Stays With the Entity, Not the Owner
The IRS assigns an EIN to a legal entity. A corporation, partnership, or LLC exists separately from the people who own it, so when ownership shifts, the entity carries on and its EIN carries on with it. A sole proprietorship is different: there is no separate entity, so the EIN is tied to the owner personally and can’t survive a change in that person.
This is why the real question in almost every ownership transfer is not “can the EIN move?” but “did the transaction create a new entity?” If the answer is yes, the new entity needs its own EIN. If the answer is no, the existing EIN keeps working, and the only paperwork is updating the IRS’s records about who runs the business.
Buying a Business: Stock Purchase vs. Asset Purchase
The structure of the purchase controls what happens to the EIN.
In a stock purchase, the buyer acquires ownership shares of the target company. The company itself continues to exist as the same legal entity, just with new owners. Because the entity’s identity doesn’t change, the target company keeps its existing EIN, and the buyer simply becomes the new owner of an entity the IRS already knows.1Internal Revenue Service. When to Get a New EIN
In an asset purchase, the buyer acquires the equipment, inventory, contracts, and other assets but not the legal entity itself. The buyer is operating a different business using those assets, and that business needs its own EIN. The seller keeps the original EIN for any remaining obligations, including final tax returns.1Internal Revenue Service. When to Get a New EIN
Mergers follow the same logic. The corporation that survives a merger continues using its existing EIN. If two companies combine to form an entirely new corporation, that new corporation needs a new EIN.1Internal Revenue Service. When to Get a New EIN
Inheriting a Business After the Owner Dies
When a sole proprietor dies, the business’s EIN effectively dies too. The original number was assigned to the owner personally, since a sole proprietorship isn’t a separate legal entity, so there is nothing for an heir or estate to inherit. If the estate continues operating the business, the administrator must obtain a new EIN for those operations.1Internal Revenue Service. When to Get a New EIN
The estate itself also needs its own EIN to file Form 1041 (the estate income tax return) if estate assets generate more than $600 in annual income. The estate administrator is responsible for securing that number, reporting wages or income under it, and paying any taxes due.2Internal Revenue Service. Responsibilities of an Estate Administrator
Corporations and LLCs are different. The entity exists separately from its owners, so if a shareholder or member dies, the entity keeps its EIN. The change in ownership is handled through the operating agreement or bylaws, not through the IRS.
Single-Member LLCs: One Narrow Carry-Over
There is one situation that looks like an EIN transfer but isn’t. If you already have a sole proprietor EIN and you form a single-member LLC, you can use that same EIN for the LLC, because the IRS treats single-member LLCs as “disregarded entities” by default. This only works if you don’t elect corporate or S corporation tax treatment and you don’t have employees or owe excise tax.1Internal Revenue Service. When to Get a New EIN
The moment you hire your first employee or elect corporate taxation, that arrangement ends and the LLC needs its own EIN. This catches a lot of growing businesses off guard, especially freelancers who formed an LLC early and later bring on staff.
What Does Carry Over: Successor Employer Wage Credits
Buyers in an asset purchase usually ask about transferring the EIN because they’re worried about restarting payroll taxes mid-year. The EIN doesn’t move, but a separate IRS mechanism solves that problem.
Under IRC ยง3121(a)(1), when a company acquires substantially all the property of another business and immediately employs that business’s workers, the acquiring company can count wages the predecessor already paid toward the Social Security wage base for that calendar year.3Office of the Law Revision Counsel. 26 USC 3121 – Definitions Without this rule, employees caught in a mid-year acquisition would have Social Security taxes withheld on wages they’d already crossed the threshold on under the prior employer.
The same logic applies to federal unemployment tax, which is calculated on the first $7,000 paid to each employee per year. A qualifying successor employer can credit wages the predecessor already paid toward that $7,000 cap rather than restarting from zero.4Internal Revenue Service. Topic No. 759, Form 940 – Employers Annual Federal Unemployment (FUTA) Tax Return
To qualify, the acquiring business must take over substantially all of the predecessor’s trade or business property and immediately employ the predecessor’s workers. Getting the test wrong means filing incorrect employment tax returns for every affected employee, so this is worth working through carefully with a tax professional.
What to Do Instead: New EIN or Updated Records
Once you know whether your transaction creates a new entity, the next step is either applying for a new EIN or updating the existing one.
If the transaction created a new entity (asset purchase, inheritance of a sole proprietorship, or a new corporation formed by merger), apply using IRS Form SS-4. The online application issues an EIN immediately. Fax applications typically return an EIN within four business days, and mailed applications take roughly four weeks.5Internal Revenue Service. Instructions for Form SS-4 The IRS limits each responsible party to one EIN application per day.
If the entity survived the transaction (stock purchase, surviving corporation in a merger, or a death that doesn’t dissolve a corporation or LLC), the existing EIN keeps working, but the IRS needs to know who’s now in charge. File Form 8822-B to update the responsible party within 60 days of the change.6Internal Revenue Service. About Form 8822-B, Change of Address or Responsible Party – Business The same form handles business address updates. Filing it does not transfer the EIN. It simply tells the IRS who to contact. Processing takes four to six weeks, so file promptly to avoid gaps in correspondence.7Internal Revenue Service. Form 8822-B, Change of Address or Responsible Party – Business
State-level filings are a separate matter. Structural or ownership changes typically require updates with the secretary of state, including registered agent information, amended articles of organization or incorporation, and renewed business licenses under the correct entity information. Missing these can cost a business its good standing even if federal filings are current.
Closing an EIN the Seller No Longer Needs
On the seller’s side, the IRS never cancels an EIN. Once assigned, it permanently belongs to that entity. If the business has been sold or wound down, you can ask the IRS to deactivate the account by sending a letter that includes the entity’s EIN, legal name, address, and the reason for closing. Mail the request to the IRS office in Kansas City, MO or Ogden, UT.8Internal Revenue Service. If You No Longer Need Your EIN
Before the IRS will deactivate an EIN, all outstanding tax returns must be filed and all taxes owed must be paid. This is one reason people sometimes look for a shortcut to hand the number off to a buyer instead of closing it out properly. There isn’t one. The EIN stays with the entity it was issued to, and any new owner operating a new entity needs a number of their own.