If you are a foreign owner of a US LLC and you have missed multiple years of Form 5472 filings, you can catch up on all of them in a single submission. There is no cap on how many years you can file at once, and the IRS has a specific pathway for doing this called the Delinquent International Information Return Submission Procedures (DIIRSP). This guide walks through the practical mechanics.

TL;DR

  • You can file Form 5472 for any prior year. There is no statute of limitations on filing a delinquent information return.
  • Each tax year is a SEPARATE package: one pro forma Form 1120 + one Form 5472 + one reasonable cause statement per year. You cannot combine multiple years onto a single form.
  • You can submit all years together in one fax or envelope to the IRS. A single submission, multiple packages inside.
  • Use the current revision of Form 5472 (Rev. Dec 2023) for all tax years since 2019. Form 1120 is year-specific: use the revision that matches each tax year.
  • Filing voluntarily under DIIRSP before the IRS contacts you is the recommended path.

The Structure of a Multi-Year Catch-Up

A single-year Form 5472 package has three parts: the pro forma Form 1120, the Form 5472 itself attached to it, and optionally a reasonable cause statement explaining why the return is late. When you catch up on multiple years, you simply produce one of these packages per year and submit them together.

For example, a user catching up on 2022, 2023, and 2024 would prepare:

  • Tax year 2022: pro forma Form 1120 (2022 revision) + Form 5472 + reasonable cause statement for 2022
  • Tax year 2023: pro forma Form 1120 (2023 revision) + Form 5472 + reasonable cause statement for 2023
  • Tax year 2024: pro forma Form 1120 (2024 revision) + Form 5472 + reasonable cause statement for 2024

All three packages can be faxed together to the IRS DE-only fax number (855-887-7737) or mailed as a single envelope. Internally the IRS PIN Unit processes each year independently, so mixing them does not cause a problem.

Which Form Revisions to Use

This is the most common source of confusion in multi-year catch-up.

Form 5472 is stable. The IRS accepts the current revision (Rev. December 2023 as of this writing) for all tax years since 2019 per IRM 4.4.9.4.6. You do not need to hunt down the 2021 or 2022 revision of Form 5472.

Form 1120 is different. The IRS updates Form 1120 almost every year and the layout can change meaningfully between years. For each tax year you catch up on, use the Form 1120 revision that matches that year. Old revisions are available on the IRS prior-year products page.

If you file a 2022 tax return using the 2025 revision of Form 1120 by mistake, the IRS generally still processes it, but it is cleaner and lower-risk to use the correct year's form.

The Reasonable Cause Statement for Multiple Years

Each year needs its own statement because each year's late filing is a separate penalty event under IRC §6038A(d). In practice the statements for multiple years in the same catch-up package are very similar. They typically share the same underlying explanation (you did not know you had to file, your formation service did not mention it, etc.) but are dated and signed separately.

A well-structured multi-year reasonable cause statement does four things, per the standards in IRM 20.1.1.3.2:

  1. States the facts chronologically, starting with the entity formation and ending with the current catch-up filing.
  2. Explains what prevented timely filing (formation service did not mention Form 5472, accountant did not flag it, reliance on a foreign tax professional who was not familiar with US information reporting, etc.).
  3. Shows ordinary business care and prudence — what a reasonable person in the same position would have done.
  4. Documents what you did once you learned: reconstructed transactions, prepared forms for every delinquent year, filed voluntarily before IRS contact.

Continuation Penalties and Why Filing Soon Matters

The §6038A(d) penalty structure is $25,000 per form, plus an additional $25,000 per 30-day period (or fraction thereof) if the failure continues after the IRS mails a notice about it. The continuation penalty has no statutory cap.

For catch-up filings, the critical threshold is whether the IRS has sent you a notice about the missing return. Before a notice arrives, you are filing voluntarily under DIIRSP and the facts strongly support penalty abatement. After a notice arrives, you are responding to an assessment and the path is more adversarial.

Does Catching Up on Many Years Trigger Extra Scrutiny?

No. Filing three or five years at once is a routine workflow for the IRS PIN Unit in Ogden. They handle catch-up packages for foreign-owned DEs every day. A well-structured multi-year submission does not increase audit risk compared to a single-year filing.

What DOES increase risk is submitting inconsistent data across years (e.g., different owner names, different addresses without explanation) or failing to explain why the catch-up is happening. Keep the data consistent year-to-year and provide one unified narrative in the reasonable cause statements.

Frequently Asked Questions

How far back can I go?

You can file for any year the LLC existed and had a filing obligation. In practice most foreign-owned LLC catch-ups cover the years since formation. There is no "too old to file" cutoff.

Do I need to pay back taxes for those years?

Generally no. Form 5472 is an information return, not a tax return in the traditional sense. Foreign-owned single-member disregarded entities typically owe no federal income tax on the entity itself (the owner may have separate personal obligations in their home country). The catch-up is about reporting, not paying.

What if I had zero activity in some years?

You still need to file for those years. Under Reg §1.6038A-2, reportable transactions include any capital contribution or distribution between the LLC and its foreign owner. If you put any money into the LLC bank account (even at formation) or paid any expense from personal funds, those count. True zero-activity years are rare.

What if one of those years is a year I did file?

Skip that year. Only file delinquent years that were never submitted.

How long does the IRS take to process a multi-year catch-up?

The IRS does not typically send confirmation of information returns. You will know processing happened if they accept the reasonable cause statements (no penalty notice arrives) or reject them (you get a penalty notice and can appeal). Processing times vary but are often 6 to 12 months for paper/fax submissions.

How Filabl Handles Multi-Year Catch-Up

Filabl supports multi-year catch-up in a single flow. You select the years you want to file (2019 through the current year minus one), upload a bank statement for each year, and we generate one complete package per year with the correct Form 1120 revision, the current Form 5472 revision, and individualized reasonable cause statements. All years are faxed together to the IRS PIN Unit in a single coordinated submission.

If you only need to catch up on one year, a single-year filing works the same way. Catch-up pricing is tier-based and scales with the number of years filed.

This article is general information, not legal or tax advice. For complex catch-up scenarios with multiple years and significant transaction volume, consider consulting a qualified tax professional before submission.