Yes, you can fax Form 2553 to the IRS. There are two fax numbers, and which one you use depends on where your corporation’s principal business is located: 855-887-7734 for the eastern group of states and 855-214-7520 for the western and southern group.1Internal Revenue Service. Where to File Your Taxes (for Form 2553) Faxing is faster than mail, but it carries a proof-of-filing limitation the IRS instructions spell out, so read past the numbers before you send.
Which Fax Number to Use
The IRS splits Form 2553 processing between two service centers. Match your corporation’s principal business location to one of these lists:1Internal Revenue Service. Where to File Your Taxes (for Form 2553)
Fax to 855-887-7734 if your principal business is in Connecticut, Delaware, District of Columbia, Georgia, Illinois, Indiana, Kentucky, Maine, Maryland, Massachusetts, Michigan, New Hampshire, New Jersey, New York, North Carolina, Ohio, Pennsylvania, Rhode Island, South Carolina, Tennessee, Vermont, Virginia, West Virginia, or Wisconsin.
Fax to 855-214-7520 if your principal business is in Alabama, Alaska, Arizona, Arkansas, California, Colorado, Florida, Hawaii, Idaho, Iowa, Kansas, Louisiana, Minnesota, Mississippi, Missouri, Montana, Nebraska, Nevada, New Mexico, North Dakota, Oklahoma, Oregon, South Dakota, Texas, Utah, Washington, or Wyoming.
Sending the form to the wrong number means the wrong service center receives it, and the IRS may treat an improperly routed submission as if it was never filed. Check the number twice before dialing. If your state of incorporation is different from where you actually operate, go by the location of your principal business office.
Proof of Filing Is the Catch
The Form 2553 instructions list exactly four types of acceptable proof if the IRS ever questions whether you filed: a certified or registered mail receipt with a timely postmark, Form 2553 stamped as accepted, Form 2553 with a stamped IRS received date, or an IRS letter confirming acceptance.2Internal Revenue Service. Instructions for Form 2553 A fax transmission confirmation sheet is not on that list.
Faxing is still a valid filing method. The IRS explicitly offers it. But the confirmation your fax machine spits out carries less evidentiary weight than a certified mail receipt if a dispute arises about whether or when you filed. The instructions also direct you to keep the original signed Form 2553 with your permanent records when you file by fax.2Internal Revenue Service. Instructions for Form 2553 In practice that means holding onto three things: the wet-signature original, the fax confirmation page, and the IRS acceptance letter once it arrives.
When Mail Is the Safer Choice
If you are filing close to a deadline and need ironclad proof of timely submission, mail is often the better option. Certified mail with return receipt requested is the strongest proof you can create. Under federal law, the registered or certified mail date is treated as the postmark date for determining whether a filing was timely.3Office of the Law Revision Counsel. 26 USC 7502 – Timely Mailing Treated as Timely Filing and Paying Keep the certified receipt and the green return card together.
The eastern group of states mails Form 2553 to the Kansas City, MO 64999 service center; the western and southern group mails to Ogden, UT 84201.1Internal Revenue Service. Where to File Your Taxes (for Form 2553)
An IRS-designated private delivery service is another option. FedEx, UPS, and DHL each have specific service tiers that qualify, including FedEx Priority Overnight, UPS Next Day Air, and DHL Express.4Internal Revenue Service. Private Delivery Services (PDS) Not every service level from these carriers qualifies, so confirm the tier before shipping.
Confirming the IRS Received Your Fax
Once the IRS processes Form 2553, you will receive Notice CP261 confirming acceptance of your S corporation election.5Internal Revenue Service. Understanding Your CP261 Notice Put that notice in your permanent records. It is one of the four types of proof the IRS itself recognizes.
Processing times vary. If you filed by fax and have not received Notice CP261 within 60 days, call the IRS to confirm receipt. This follow-up matters more for fax filers than for mail filers, because your fax confirmation page alone is not among the IRS’s listed proof-of-filing methods. Do not assume silence means acceptance.
The Deadline You’re Faxing Against
Timing drives everything about Form 2553. The election must be filed either during the tax year before the one you want S status to begin, or no later than two months and 15 days into the tax year when the election takes effect.6Office of the Law Revision Counsel. 26 USC 1362 – Election; Revocation; Termination For an existing calendar-year corporation, that puts the deadline on March 15.
Filing one day late pushes your S corp status to the following tax year. A March 16 filing for a 2026 effective date means you are taxed as a C corp for all of 2026, with S status not starting until January 1, 2027.
A newly formed corporation has the same two-month-and-15-day window, but the clock starts on the earliest of three dates: when the corporation first has shareholders, first acquires assets, or first begins doing business. Incorporate on June 10, issue no stock and acquire no assets until August 1, and the filing window runs from August 1 through October 15.
If You Missed the Deadline
A late fax does not permanently close the door. The IRS offers simplified relief under Revenue Procedure 2013-30 if you meet all four of these conditions:7Internal Revenue Service. Late Election Relief
- The corporation would have qualified as an S corp if the election had been timely.
- There was reasonable cause for the late filing.
- The corporation and all shareholders reported their income as if the S election had been in effect for the intended year and every year since.
- Fewer than 3 years and 75 days have passed since the intended effective date.
To use this relief, submit the late Form 2553 with a written statement explaining the reasonable cause. The statement must reference Revenue Procedure 2013-30 and include confirmation from every shareholder that they reported all S corporation income on their personal returns for the relevant years. File Form 1120-S consistently with the desired effective date, even if that return is also late.8Internal Revenue Service. Revenue Procedure 2013-30
Past 3 years and 75 days, the simplified path is gone. The only remaining option is requesting a private letter ruling from the IRS National Office, which is expensive and carries no guarantee of relief. Filing late but within the 3-year-and-75-day window is far preferable to waiting.