A pro-forma Form 1120 is a 'dummy' corporate tax return that foreign-owned single-member LLCs must attach to Form 5472 when filing with the IRS. It is not a tax return - it is a required cover sheet that carries crucial identifying information.
When foreign entrepreneurs discover they need to file Form 5472, many are surprised to learn they also need to prepare a pro-forma Form 1120 - even though their LLC is not a corporation and owes no corporate income tax. This requirement causes widespread confusion and is a top reason for compliance failures among international founders.
Form 1120 is the U.S. Corporation Income Tax Return, filed annually by domestic corporations to report their income, deductions, gains, losses, and tax liability. A regular C-corporation files this form and pays federal corporate income tax on its profits. However, a foreign-owned single-member LLC treated as a disregarded entity is not a corporation and normally does not file Form 1120.
A pro-forma Form 1120 is a modified, incomplete version of the standard Form 1120 used solely as a transmittal document - a cover sheet - to accompany Form 5472. It is labeled 'Pro Forma' at the top. The LLC fills in identifying information (name, EIN, address, tax year) but leaves financial fields blank or marks them as not applicable. It signals to the IRS that this filing is for information purposes only under the disregarded entity rules.
IRS regulations under Treas. Reg. ยง1.6038A-2 require that a foreign-owned disregarded entity file Form 5472 'in the manner and at the time prescribed' - which the IRS has determined means attaching it to a pro-forma Form 1120. The IRS treats the disregarded LLC as if it were a separate corporation solely for this reporting purpose. Without the pro-forma 1120, the Form 5472 submission is considered incomplete, and the $25,000 penalty applies.
When completing the pro-forma Form 1120, you will need: the LLC's full legal name exactly as registered, the Employer Identification Number (EIN), the LLC's principal business address (U.S.), the tax year beginning and ending dates, and the principal business activity and product or service description. Financial fields like income, deductions, and tax are left blank. The form must be clearly marked 'Filed pursuant to Treas. Reg. 1.6038A-2(b)' or noted as pro-forma.
Mistake 1: Filing Form 5472 without attaching the pro-forma Form 1120 - this is the single most common error and triggers the $25,000 penalty automatically. Mistake 2: Using the wrong EIN - the EIN must belong to the U.S. LLC, not to the foreign owner. Mistake 3: Omitting the tax year - the form must clearly specify which tax year is being reported. Mistake 4: Failing to sign - both forms must be signed by an authorized officer or owner. Mistake 5: Sending to the wrong IRS address - the combined filing goes to a specific IRS address or fax number.
Does my LLC owe corporate income tax because I filed Form 1120?
No. The pro-forma Form 1120 is only a transmittal document. A disregarded entity LLC does not become a corporation by filing it, and no corporate tax is due. The LLC's income (if any) is reported on the owner's personal tax return in their country of residence.
I filed Form 5472 without the pro-forma 1120. What should I do?
You should file an amended or superseding complete submission immediately - including both forms - and attach a statement explaining the error. Consider consulting a tax professional to request abatement of any penalty based on reasonable cause.
My LLC has no activity and no transactions. Do I still need the pro-forma 1120?
If you have no reportable transactions whatsoever, you may not need to file Form 5472 at all - and therefore no pro-forma 1120 either. However, always verify with a tax professional, because capital contributions from the owner always count as reportable transactions.
Where do I mail or fax the pro-forma Form 1120 with Form 5472?
The combined filing is sent to the IRS center in Ogden, Utah. The current mailing address and fax number are listed in the IRS Instructions for Form 5472. ComplyWise handles the submission directly, so you don't need to worry about the correct destination.
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