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The IRS Form 5472 fax number (and how to actually send it)

The IRS Form 5472 fax number is +1-855-887-7737 — the Ogden PIN Unit. Fax is the fastest way to file Form 5472 with its attached pro forma Form 1120, and the fax transmission receipt is your proof of timely filing under IRC § 6038A. This is exactly what to send, in what order, which fax services work, what to do if the fax fails, and how to get the IRS-acknowledged proof of timely submission.

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The number

Fax to: +1-855-887-7737 (IRS Ogden PIN Unit) This is the IRS's published fax number for Form 5472 and the attached pro forma Form 1120 filed by foreign-owned US disregarded entities. The Ogden Service Center processes all of these returns — they cannot be e-filed. This number is specific to Form 5472 + pro forma 1120 filings by foreign-owned single-member LLCs. Other tax filings (real corporate returns, partnership returns, personal returns) use different IRS fax numbers. Do not use this fax number for any other type of return. It's a US toll-free number, so from outside the US you can call it via any international fax service that supports US destinations. Most online fax services charge $1-$5 per send.

What you need to send

The fax must contain, in this order: 1. Cover sheet (1 page) — your name, the LLC name, EIN, tax year, page count, and "Form 5472 + Pro Forma 1120 — Foreign-Owned U.S. DE". 2. Pro forma Form 1120 — entity identification fields filled in, signed in pen, with "Foreign-Owned U.S. DE" stamped across the top. Income, deductions, and tax sections blank. 3. Form 5472 — fully filled in (Parts I, II, III, IV, V, VII at minimum). 4. Part V supporting statement — lists every reportable transaction (capital contributions in, distributions out, etc.) with date, amount, and related party. 5. Reasonable Cause Statement — only if you're filing late under DIIRSP. Total pages: typically 5-8 depending on transaction count. Every page that requires a signature must be signed in pen — the IRS does not accept digital-only signatures on these forms. The only signature line is on Form 1120 (bottom of page 1).

Which fax services work?

Any fax service that can send to a US toll-free number works. Common choices: • eFax (~$17/month with several free outbound pages monthly). • MyFax (~$10/month). • FaxZero (free for up to 5 pages with ads, or paid tier for ad-free). • Pamfax (pay-per-page, no subscription). • HelloFax / Dropbox Sign (~$10/month). • Google Voice with Workspace + HelloFax integration. • A physical fax machine if you have access. • Our service ($19 flat — bundled with filing prep). For a one-time fax of a 5-8 page document, FaxZero (free) or Pamfax (pay-per-page) are the cheapest DIY options. For ongoing use, monthly subscriptions become economical. Keep the transmission receipt the service generates — it shows the fax was successfully delivered, with a timestamp. That receipt is your legal proof of timely filing under IRC § 6038A. Without it, you can't prove you filed on time if the IRS later assesses a penalty.

How to actually send a fax in 2026

If you've never sent a fax before, here's the modern path: 1. Sign up for an online fax service (FaxZero is free for occasional use; eFax / MyFax for subscriptions). 2. Upload your signed PDF as the document to fax. 3. Enter the destination fax number: +18558877737 (some services accept hyphens or parentheses; +1-855-887-7737 also works). 4. Add an optional cover sheet (most services let you skip this since your cover letter is page 1 of the PDF). 5. Hit Send. 6. Wait for the confirmation email. Most US fax transmissions to the IRS complete in 5-30 minutes. 7. Save the confirmation email and the transmission receipt PDF. There's no need for a fax machine, fax modem, landline, or any specialized hardware. Online fax services route through real fax protocols on the receiving side — the IRS Ogden line is a standard US fax line that accepts these transmissions transparently.

Skip the fax — we handle it

Add our $19 fax delivery service at checkout and we fax the signed package to +1-855-887-7737 for you. You get: • A timestamped IRS Fax Transmission Receipt PDF emailed back to you. • A copy of the receipt in your portal you can re-download anytime. • An email confirmation when the fax delivers. • Automatic retry if the first attempt fails. • Proof-of-filing language formatted to satisfy any future IRS questions about timing. If the first fax attempt fails, we automatically retry. If multiple attempts fail (rare but possible during IRS Ogden maintenance windows), we'll reach out before falling back to certified mail. 100% money-back guarantee if we fail to submit your filing to the IRS. For most foreign LLC owners — especially those without a US fax service subscription — the $19 fee is worth it for the proof-of-filing receipt alone.

What if the fax fails?

The IRS Ogden fax line is generally reliable but can experience temporary outages, especially during peak filing periods (early April). If your fax fails: 1. Wait 5-10 minutes and retry. Most failures are transient and self-resolve. 2. If multiple retries fail over an hour, check the IRS website for any announced fax outages. 3. If still failing the next business day, fall back to certified mail. Certified mail fallback: • Address: Internal Revenue Service, Ogden, UT 84201-0023. • Use certified mail with return receipt requested. • Postmark date counts as your filing date — same legal weight as a fax transmission timestamp. • Mail USPS or via any major US carrier (UPS, FedEx) that offers tracked international shipping if you're outside the US. Keep your USPS Certified Mail receipt AND the return receipt (PS Form 3811 or USPS tracking confirmation) for at least 6 years. These prove timely filing.

Common fax mistakes to avoid

• Faxing only Form 5472 without the pro forma 1120 — the IRS will reject and treat as not filed. Always send the complete package. • Faxing to the wrong number — must be +1-855-887-7737 (Ogden PIN Unit). Other IRS fax numbers are for different filings. • Sending unsigned forms — the signature line on Form 1120 must be signed in pen on the printed page before fax. • Sending an unsigned cover letter — the cover letter itself doesn't require a signature; the 1120 inside does. • Faxing pages out of order — the IRS Ogden team handles thousands of these; well-ordered packages are processed faster. • Forgetting to save the transmission receipt — without it, you have no proof of timely filing. • Filing after midnight on April 15 (deadline) — the timestamp is what counts, so send before midnight in your local timezone. • Sending color or low-resolution scans — black and white at 200dpi or higher is the safe choice for fax fidelity.

Proof of filing — what to save

Keep all of these for at least 6 years (IRS examination window for incomplete returns): • The signed PDF you faxed (full package). • The fax transmission receipt with timestamp. • The fax service's confirmation email. • If you used our service: the timestamped IRS Fax Transmission Receipt PDF we email and store in your portal. • If you filed by mail: the certified mail receipt (PS Form 3800) and return receipt (PS Form 3811). If the IRS later (incorrectly) assesses a CP-15 penalty for a return you filed on time, you respond with the proof and they reverse the assessment. Without proof, you'd be in a much harder position to dispute the penalty. Store them somewhere durable: cloud storage (Google Drive, Dropbox), email folder, or paper file. Don't rely on your fax service's own retention — many services delete sent items after a year or two.

Mail vs. fax — which is better?

Fax (preferred): • Faster delivery — transmission completes in minutes. • Immediate proof of receipt — the fax confirmation timestamp. • Lower risk of misdelivery (no chance of getting lost in physical mail). • Cheaper than international certified mail. • Works the same from anywhere in the world. Mail (backup): • Slower — takes days to weeks for delivery, especially internationally. • Proof of timely filing relies on postmark date and certified mail receipt. • Risk of physical misdelivery or loss. • More expensive for international senders ($20-$80 vs $0-$5 for fax). • Can be the only option if fax service fails. For most foreign LLC owners, fax is the right default. Mail is the fallback when fax fails or as a redundant filing method (some cautious filers fax AND mail to maximize proof).

Your annual fax routine

If you file Form 5472 every year (and you should), the fax routine becomes: • Tax year ends December 31. • In January or February, prepare the filing (12-question wizard with us, ~5-10 minutes for returning customers). • Sign on screen. • Fax to +1-855-887-7737 (we do it for $19 or you self-fax). • Save the transmission receipt. • Done until next year. Total time investment: about 15 minutes once a year. Cost: $98 with us (1 year + fax delivery). Penalty avoided: $25,000. Most of our returning customers fax in early February and have the obligation handled with 10+ weeks of buffer before the April 15 deadline.

Skip the work — file in 15 minutes.

We generate every form, you sign one PDF, we fax it to the IRS Ogden PIN Unit. Flat $79.00 + $19.00 fax delivery.

  • Filled IRS Form 5472 + pro forma 1120
  • Reasonable cause statement (if late)
  • Faxed to IRS Ogden PIN Unit
  • 100% money-back guarantee

Frequently asked questions

Is +1-855-887-7737 the right fax number for Form 5472 in 2026?
Yes. This is the current IRS Ogden PIN Unit fax number for Form 5472 + pro forma 1120 filings by foreign-owned US disregarded entities. Has been the same number since the §6038A rule extension in 2017.
Can I email Form 5472 to the IRS instead?
No. The IRS does not accept Form 5472 by email under any circumstances. Fax or paper mail only.
Do I get a confirmation from the IRS that they received my fax?
Not directly from the IRS. Your fax transmission receipt (from your fax service) is the legal proof of timely filing. The IRS doesn't send a separate confirmation. If you don't see a CP-15 notice over the following 6-18 months, no news is good news.
How long does it take you to fax it?
Once you sign your filing and our accountant reviews the package, we fax it the same business day. You'll get the IRS fax transmission receipt by email within a few hours.
What's the IRS Ogden mailing address?
Internal Revenue Service, Ogden, UT 84201-0023. Use certified mail with return receipt. The postmark counts as your filing date.
Can I fax from outside the US?
Yes. Any online fax service that supports US destinations works from any country. The fax routes through standard US fax protocols on the receiving side — no special arrangement needed.
What if the IRS Ogden fax is down on the deadline day?
Retry every 30 minutes. If it stays down past evening, fax it the next morning (still on time if the original day's transmission attempt is logged) or send by certified mail with same-day postmark.
Does the fax need a cover sheet?
Recommended but not strictly required. Your filing package's cover letter (page 1 of the PDF) serves as the practical cover sheet. Some fax services add their own cover sheet automatically — that's fine too.
Can I send multiple LLCs' filings in one fax?
No. Each LLC's filing is a separate fax — different EIN, different package. Combining them risks mis-routing and incomplete processing.
How do I get the timestamped receipt that's accepted as proof of filing?
Any fax service generates a transmission receipt with a timestamp and destination number. Our $19 fax delivery service emails you a polished IRS Fax Transmission Receipt PDF that's also stored in your portal for re-download.

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