Form 5472 & Proforma 1120 Calculator: Calculate Related Party Transaction Values & Avoid $25,000 IRS Penalties

What Is Form 5472 and Why Do You Need It?

Form 5472 is an information return filed with the IRS by certain U.S. corporations that have foreign ownership. The form reports transactions between the U.S. corporation and its foreign related parties. It is not a tax return — it does not calculate tax owed. Instead, it provides the IRS with visibility into cross-border transactions that could impact U.S. tax liability.

The form is required under IRC §6038A. The penalty for failing to file Form 5472 is $25,000 per form. If the IRS notifies you of the failure and you do not file within 90 days, an additional $25,000 penalty applies for each 30-day period (or fraction thereof) that the failure continues after the 90-day period expires. There is no maximum cap on continuation penalties.

What Is a Proforma 1120?

A proforma 1120 is a "dummy" or "placeholder" Form 1120 that is filed alongside Form 5472. It is not a real tax return — it does not report actual income or pay tax. Instead, it serves as a cover page to attach Form 5472 to the IRS filing system.

In most cases, Form 5472 is filed by foreign-owned U.S. disregarded entities (DEs), such as single-member LLCs owned by a foreign person. Since a DE does not file Form 1120 for tax purposes, the IRS requires a proforma 1120 to be attached when filing Form 5472. The proforma 1120 should include the entity's name, EIN, and the statement "Foreign-Owned U.S. Disregarded Entity."

The proforma 1120 itself does not calculate tax. It is purely a procedural requirement to get Form 5472 into the IRS system. However, the information reported on Form 5472 — including transaction values — determines your penalty exposure if you fail to file correctly.

What Is a "Reporting Corporation"?

For Form 5472 purposes, a "reporting corporation" includes:

• Domestic corporations — any U.S. corporation (C-Corp) that meets the foreign ownership threshold.
• Foreign corporations engaged in a U.S. trade or business — foreign corporations with U.S. business activities that meet the threshold (filing Form 1120-F).
• Foreign-owned U.S. disregarded entities (DEs) — single-member LLCs, trusts, or other entities that are disregarded for tax purposes but have foreign ownership.

Partnerships are not reporting corporations for Form 5472 purposes, even if foreign-owned. Partners may have separate reporting obligations under other rules. The "reporting corporation" definition comes from IRC §6038A(c)(1) and Reg. §1.6038A-1(c).

What Is a "25% Foreign Shareholder"?

A "25% foreign shareholder" means a foreign person who owns, directly or indirectly, at least 25% of the total voting power or total value of the corporation's stock. Constructive ownership rules apply — you must include stock owned by related persons (spouses, children, parents, siblings, and certain entities).

If multiple foreign persons each own less than 25% but collectively own 50% or more, the reporting corporation must still file Form 5472 for transactions with each foreign related party that meets the reportable transaction threshold.

What Is a "Related Party"?

A related party is a foreign person that is related to the reporting corporation under IRC §6038A(c)(2) and Reg. §1.6038A-1(e). This includes:

• Direct ownership — a foreign person who owns 25% or more of the corporation.
• Indirect ownership — foreign persons related to the direct owner (spouse, children, parents, siblings, and certain entities).
• Foreign corporations — if the U.S. corporation owns 25% or more of the foreign corporation's stock.
• Foreign partnerships, trusts, and estates — if the U.S. corporation owns 25% or more of the entity's profits or capital.

The related party must be a "reportable party" under the regulations. If you are unsure whether a party is related, consult a tax professional.

Do You Need to File Form 5472? (3-Minute Self-Assessment)

Many taxpayers are confused about whether they need to file Form 5472. Use this quick self-assessment to determine your filing obligation. Answer each question in order.

Self-Assessment Checklist

• Step 1: Do you have a U.S. corporation, foreign corporation in U.S. trade/business, or foreign-owned U.S. disregarded entity?
  If NO, you do not need to file Form 5472. If YES, proceed to Step 2.
• Step 2: Does a foreign person own 25% or more of your corporation (directly or indirectly)?
  If NO, you likely do not need to file Form 5472. If YES, proceed to Step 3.
• Step 3: Did you engage in any reportable transactions with a foreign related party during the tax year?
  If NO, you must still file Form 5472 if you meet the ownership threshold (even with zero transactions). If YES, proceed to Step 4.
• Step 4: Are your transactions exempt under the regulations?
  There is no blanket exemption for related-party transactions. Cost-sharing arrangements are not exempt — they are reported on Part VIII of Form 5472. If you engaged in any reportable transaction, you must file Form 5472.

Important: If you meet the 25% foreign ownership threshold, you must file Form 5472 even if you had no transactions during the year. This is a common point of confusion. Dormant entities with foreign ownership still have a filing obligation.

Common Filing Scenarios

What Happens If You Miss the Filing Deadline?

Form 5472 is due on the same day as the corporation's tax return — April 15 for calendar year taxpayers. If you fail to file on time, the $25,000 base penalty applies. If the IRS notifies you of the failure and you do not file within 90 days, an additional $25,000 penalty applies for each 30-day period (or fraction thereof) that the failure continues after the 90-day period expires.

There is no statutory maximum for continuation penalties. In practice, the IRS may abate penalties for reasonable cause, but this is not guaranteed. The safest approach is to file on time — even if you are unsure whether you need to file, it is better to file and avoid the penalty.

Extensions are available. A corporation can file Form 7004 for a 6-month extension (to October 15 for calendar year taxpayers). The extension for Form 5472 automatically extends with the tax return extension.

Key takeaway: If you meet the 25% foreign ownership threshold, file Form 5472 — even with zero transactions. The $25,000 penalty is not worth the risk.

What Counts as a Reportable Transaction on Form 5472?

Understanding what counts as a reportable transaction is critical. The IRS defines reportable transactions broadly, and many taxpayers inadvertently miss transactions that should be reported. This section breaks down every category of reportable transaction with examples.

Monetary Transactions (Part IV)

Monetary transactions are transactions involving the transfer of money or cash equivalents. All monetary transactions between a reporting corporation and a foreign related party must be reported on Part IV — monetary receipts on Lines 9–22 and monetary payments on Lines 23–36. Here are the specific categories:

Nonmonetary Transactions (Part VI — Report at FMV)

Nonmonetary transactions are transfers of property, services, or other assets where no cash changes hands. These must be reported in Part VI at fair market value (FMV), which is then included in Line 1f.

Part V: Reportable Transactions of a Foreign-Owned U.S. DE

Part V applies only to foreign-owned U.S. disregarded entities (DEs) — single-member LLCs and similar entities wholly owned by a foreign person. If the DE had any "other transaction" as defined by Reg. §1.482-1(i)(7) that is not already entered in Part IV — amounts paid or received in connection with the formation, dissolution, acquisition, or disposition of the entity, including contributions to and distributions from the entity — check the box in Part V and describe the transactions on an attached statement.

For a foreign-owned U.S. DE, these Part V amounts are included in the Line 1f total of this form and the Line 1h total across all forms, alongside Lines 22 and 36 of Part IV and the Part VI FMV.

Example: A foreign-owned single-member LLC is formed during the year and receives a $20,000 contribution from its foreign owner. If the contribution is a formation-related transaction not already entered in Part IV, describe it on the attached statement and check the Part V box.

Are Any Transactions NOT Reportable?

There is no general exemption for transactions between a reporting corporation and a foreign related party. A few practical points:

• Domestic related parties — Part IV is not completed for transactions with U.S. related parties; Form 5472 applies to foreign related parties.
• Small amounts — if an individual transaction (or a series of transactions) does not exceed $50,000, you may report the amount as "$50,000 or less." The transaction is still reportable.
• Cost-sharing arrangements — not exempt. They are reported in Part VIII of Form 5472, with the total number of Parts VIII entered on line 1k.
• If in doubt, report it — the $25,000 per-form penalty for noncompliance far exceeds the cost of over-reporting.

Proforma 1120: What It Is and How to Complete It

As covered in Section 1, a proforma 1120 is a "placeholder" Form 1120 filed alongside Form 5472 as a cover page — it is not a real tax return and does not calculate tax.

Most filers are foreign-owned U.S. disregarded entities (DEs) — single-member LLCs owned by a foreign person. Since a DE does not file Form 1120 for tax purposes, the IRS requires a proforma 1120 to be attached when filing Form 5472.

Who Needs to File a Proforma 1120?

You need to file a proforma 1120 if:

• You are a foreign-owned U.S. disregarded entity (DE) — single-member LLC, trust, or other entity that is disregarded for tax purposes.
• You have a reporting corporation that does not file Form 1120 — such as a foreign-owned DE that is not otherwise required to file a tax return.

If your reporting corporation already files Form 1120 (e.g., a U.S. C-Corp), you do not need a separate proforma 1120 — you attach Form 5472 to your actual Form 1120.

Step-by-Step Proforma 1120 Completion Guide

Follow these steps to complete the proforma 1120 correctly:

1. Obtain Form 1120. Download the current year Form 1120 from IRS.gov. Use the same year as your Form 5472 filing.
2. Complete the top of the form. Enter the corporation's name, EIN, address, and the tax year. Use the same information as on Form 5472.
3. Check the "Foreign-Owned U.S. Disregarded Entity" box. This is critical. It signals to the IRS that this is a proforma filing, not a real tax return.
4. Leave all income and expense lines blank or enter zeros. The proforma 1120 does not report income or tax. Only the cover page is required.
5. Attach Form 5472. The proforma 1120 serves as the cover page. Attach all required Form 5472 schedules (Part IV, Part V, Part VI, etc.).
6. Sign and date the proforma 1120. A corporate officer must sign. Include title and date.
7. Mail the filing to the correct IRS address. Form 1120 is e-file mandatory, but a foreign-owned U.S. DE cannot file Form 5472 electronically — per the IRS instructions, mail or fax the proforma 1120 package (Form 5472 with proforma 1120) to the dedicated DE mailing address in the instructions.

Common Mistakes to Avoid

Proforma 1120 vs. Actual Form 1120

Key Takeaway: If you are a foreign-owned U.S. disregarded entity, file a proforma 1120 with Form 5472 every year you meet the filing requirement — even with zero transactions. It keeps you compliant with the IRS and avoids the $25,000 penalty.

Understanding Form 5472 Calculation Mechanics

This section explains exactly how to calculate the figures that go on Form 5472. The IRS instructions require specific calculations for Part IV and Part VI. Follow these steps to ensure accuracy.

Part IV Monetary Receipts: Lines 9–22

Monetary receipts are amounts received by the reporting corporation from a specific foreign related party. You must complete a separate Part IV schedule for each related party, and enter the total receipts on Line 22.

Example: A U.S. corporation had the following monetary transactions with its foreign parent during the tax year:

• Sales of inventory: $50,000 (receipt)
• Purchases of inventory: $20,000 (payment)
• Interest paid on loan: $5,000 (payment)
• Rent paid: $12,000 (payment)
• Services received: $15,000 (payment)

Line 22 (Total Monetary Receipts) = $50,000; Line 36 (Total Monetary Payments) = $20,000 + $5,000 + $12,000 + $15,000 = $52,000

Part IV Monetary Payments: Lines 23–36

Monetary payments are amounts paid by the reporting corporation to the foreign related party (purchases, services, interest paid, amounts loaned, distributions, and other amounts paid). Enter the total on Line 36.

Part VI: Nonmonetary Transactions (FMV)

Nonmonetary and less-than-full-consideration transactions are reported in Part VI at fair market value. This includes property transfers, asset contributions, cryptocurrency transfers, and other non-cash exchanges.

Example: A U.S. corporation received the following nonmonetary items from its foreign shareholder:

• Equipment contribution: FMV $40,000
• Cryptocurrency contribution: FMV $15,000
• Intellectual property transfer: FMV $50,000

Part VI FMV = $40,000 + $15,000 + $50,000 = $105,000

Line 1f: Total of This Form

Line 1f on the main Form 5472 is the total of this form: Line 22 + Line 36 + the Part VI FMV for that related party. Complete a separate Form 5472 for each related party.

Example: You have two related parties:

• Related Party A: Line 22 = $50,000, Line 36 = $52,000, Part VI = $105,000 → Line 1f = $207,000
• Related Party B: Line 22 = $75,000, Line 36 = $0, Part VI = $0 → Line 1f = $75,000

Line 1h: Grand Total Across All Forms

Line 1h is the sum of Line 1f from all Forms 5472 filed for the tax year.

Example:

• Related Party A: Line 1f = $207,000
• Related Party B: Line 1f = $75,000

Line 1h = $207,000 + $75,000 = $282,000

Line 1g: Number of Forms

Line 1g is the number of separate Forms 5472 being filed for the tax year — one form per related party with reportable transactions.

Total Reportable Value

The total reportable value across all related parties is the sum of all monetary and nonmonetary transactions — reported as Line 1h on the form. This is the figure that determines your overall filing obligation and risk level.

Example: Using the numbers above:

Total Reportable Value = $177,000 + $135,000 = $312,000

Currency Conversion for Foreign Transactions

All amounts on Form 5472 must be reported in U.S. dollars. Foreign currency transactions must be converted to USD using an IRS-approved exchange rate.

IRS-Approved Methods:

• Spot Rate: The exchange rate on the transaction date. This is the most common method.
• Annual Average Rate: The average exchange rate for the tax year. Acceptable if consistent.
• U.S. Treasury Financial Management Service Rates: Published monthly and annually.

Example: A U.S. corporation received a €10,000 loan from its foreign parent on March 15, 2026. The spot exchange rate on that date was 1.09 USD/EUR.

USD Amount = €10,000 × 1.09 = $10,900

Always document the exchange rate used and the source. The IRS may request this documentation during an audit.

Imputed Interest Under AFR (Applicable Federal Rates)

When a loan between related parties does not charge adequate interest (or charges below-market interest), the IRS may impute interest under IRC §1274(d). The imputed interest must be reported as a reportable transaction on Form 5472 (as interest received or paid, depending on the direction).

AFR Rates (July 2026, Rev. Rul. 2026-12):

• Short-term (3 years or less): 4.00%
• Mid-term (3–9 years): 4.35%
• Long-term (over 9 years): 4.98%

Example: A U.S. corporation received a $100,000 loan from its foreign shareholder with no interest. The loan is for 5 years (mid-term).

Imputed Interest = $100,000 × 0.0435 × (365/365) = $4,350

The $4,350 is reportable as interest income to the foreign shareholder and interest expense to the U.S. corporation (for Form 5472 purposes).

AFR rates are updated monthly by the IRS. For demand loans, the §7872 blended annual rate for 2026 is 3.82%. Check the current rates at IRS.gov.

Recordkeeping and the Statute of Limitations

Keep records that back up the form. A reporting corporation must maintain records sufficient to verify the accuracy of its Form 5472 — ledgers, invoices, contracts, pricing analyses, and the exchange rates used (Reg. §1.6038A-3). Keep them as long as the assessment period for the year remains open.

Failure to file keeps the assessment period open. Under IRC §6501(c)(8), if Form 5472 is not filed, the IRS can assess additional tax at any time — the normal three-year clock does not start until the form is actually furnished to the IRS. If the failure was due to reasonable cause, the extended period applies only to the items connected to the missing form.

How to Fill Part IV of Form 5472

Part IV of Form 5472 is the primary schedule for reporting transactions with a foreign related party. You must complete a separate Part IV for each related party. This section provides a step-by-step guide for each line.

Line-by-Line Instructions for Part IV

Handling Multiple Related Parties

If you have multiple foreign related parties, you must complete a separate Form 5472 — each with its own Part IV schedule — for each one. Each schedule will have its own Line 22 and Line 36 totals.

On the main Form 5472 (Part I), you will enter:

• Line 1f: Total of this form (Line 22 + Line 36 + Part VI FMV) for that related party.
• Line 1g: Total number of Forms 5472 being filed for the tax year.
• Line 1h: Sum of Line 1f from all Forms 5472 filed for the tax year.

Make sure to include the name and EIN (if available) of each related party on the Part IV schedule header.

December 2024 Instructions vs. Older Revisions

This guide follows the IRS Instructions for Form 5472 (Rev. December 2024), used with the Form 5472 (Rev. December 2023). In the current structure, Part IV reports monetary transactions only: receipts on Lines 9–22 (total on Line 22) and payments on Lines 23–36 (total on Line 36). Nonmonetary transactions are reported in Part VI, and cost-sharing arrangements get their own schedule in Part VIII (counted on Line 1k).

The December 2024 instructions updated the definition of "foreign person" (the joint-return exception now refers to IRC §§6013(g) and (h), per Reg. §1.6038A-1(f)(1)) and streamlined Part VII, removing the imported-goods and CSA-participation questions from the prior revision. Older guides may reference different line numbers, so always confirm the revision box at the top of the form you are completing.

What to Include in Part VI

Part VI is used to report nonmonetary transactions at fair market value. Monetary transactions go on Part IV (Lines 9–22 receipts, Lines 23–36 payments).

The fair market value of all nonmonetary transactions is included in Line 1f of the form (Line 22 + Line 36 + Part VI FMV).

Note: Every reportable nonmonetary transaction must be disclosed in Part VI — there is no option to omit them.

Filing the Form

After completing Part IV and any other required schedules, attach them to the proforma 1120 (if applicable) or to your actual Form 1120. Mail the entire package to the IRS address for Form 1120 filings.

Keep copies of all schedules and supporting documentation for your records. The IRS may request these during an audit.

Real-World Form 5472 Filing Examples

This section walks through five complete filing examples with real numbers. Each example shows the transaction breakdown, Part IV calculations, and the final figures that would appear on Form 5472. Use these examples as a reference for your own filing.

Form 5472 vs. Form 5471: What's the Difference?

Form 5472 and Form 5471 are both information returns filed with the IRS by foreign-owned entities. However, they serve different purposes and apply to different types of entities. This comparison table clarifies the differences.

Key Differences Summarized

• Form 5472 is about inbound transactions — foreign owners reporting to the IRS what they did with a U.S. corporation. It focuses on transactions between the U.S. entity and foreign related parties.
• Form 5471 is about outbound ownership — U.S. persons reporting to the IRS what they own abroad. It focuses on ownership of foreign corporations and their financial activities.
• Form 5472 is filed by the U.S. corporation (or DE) itself. Form 5471 is filed by the U.S. person who owns the foreign corporation.
• Form 5472 has a higher base penalty ($25,000) than Form 5471 ($10,000).

Do I Need to File Both?

In some cases, a U.S. person may need to file both Form 5472 and Form 5471. For example:

• A U.S. person owns a foreign corporation (Form 5471 filing required).
• The foreign corporation has a U.S. subsidiary (U.S. corporation) that engages in transactions with the foreign corporation (Form 5472 filing required by the U.S. subsidiary).
• In this case, both forms are required from different filers.

If you are unsure which forms apply to your situation, consult a tax professional. The penalties for non-filing are significant, so it is better to file than to risk noncompliance. Use our Form 5471 Category 4 vs 5 Filer Tracker to determine your specific filing category for foreign corporation ownership.

Why This Form 5472 Related Party Transaction Value Calculator Is Different

Most Form 5472 "calculators" on the internet are actually penalty estimators. They tell you how much you might owe if you don't file. That's useful information, but it doesn't solve the core problem: calculating the actual transaction values that go on Form 5472 itself.

This calculator was built differently. It helps you determine what to put on Part IV of Form 5472 (monetary receipts on Lines 9–22 and payments on Lines 23–36) and Part VI (nonmonetary transactions at FMV). It sums transactions across multiple related parties, converts foreign currency to USD using IRS-approved exchange rates, and estimates imputed interest under AFR. And yes, it also calculates your penalty exposure — but that is secondary to getting the filing right.

What Makes This Calculator Different?

What Most Penalty Estimators Don't Do

Most Form 5472 tools online stop at the penalty estimate. They compute the $25,000 non-filing penalty but don't help you determine what to actually put on the form — which is the harder part. A transaction-value approach adds:

• Monetary (Part IV) and nonmonetary (Part VI) transaction totals
• Currency conversion with IRS-approved exchange rates
• Per-party totals across multiple related parties
• Imputed interest calculation under AFR
• Penalty exposure as part of the full filing picture

How This Saves You Time and Money

Without this calculator, you would need to:

1. Manually track all transactions with each related party — multiple spreadsheets, risk of errors.
2. Look up exchange rates for every foreign transaction — time-consuming and prone to mistakes.
3. Calculate imputed interest manually using AFR tables — complex and easy to get wrong.
4. Aggregate totals across multiple related parties — arithmetic errors are common.
5. Find and read filing examples — scattered across different websites, often incomplete or outdated.
6. Estimate penalty exposure — many taxpayers underestimate the $25,000 base penalty + continuation penalties.

This calculator does all of these in 2 minutes. It reduces the risk of errors, saves hours of manual work, and helps you avoid the $25,000 penalty for noncompliance.

Built for Real-World Use

This calculator is not a theoretical exercise. It was designed based on real Form 5472 filing requirements, IRS instructions, and common scenarios faced by foreign-owned U.S. corporations and disregarded entities.

Every calculation it produces maps to the parts of Form 5472 it covers — Part IV monetary receipts and payments, Part VI nonmonetary FMV, and penalty exposure under IRC §6038A(d). No guesswork.

If you are a foreign-owned U.S. corporation, a single-member LLC with foreign ownership, or a foreign corporation engaged in U.S. trade or business, this calculator is built for your specific filing needs.

Frequently Asked Questions About Form 5472 & Proforma 1120

Get quick answers to the most common questions about Form 5472, proforma 1120, related party transaction reporting, and penalty exposure.

Methodology: How This Calculator Works

This calculator was built using the official IRS Form 5472 instructions (December 2024 revision), IRC §6038A and §6038C, and current 2026 tax year data. Every calculation in this tool traces directly to the form's line items and the underlying tax code.

Data Sources

• IRS Form 5472 Instructions — December 2024 revision (applicable for 2026 tax year filings)
• IRC §6038A — Information reporting with respect to foreign-related parties
• IRC §6038C — Information reporting with respect to foreign corporations engaged in U.S. business
• IRC §482 — Allocation of income and deductions among taxpayers (arm's length standard)
• IRC §1274(d) — Applicable Federal Rates (AFR) for imputed interest
• IRS Applicable Federal Rates — July 2026 AFRs (Rev. Rul. 2026-12)
• Treasury Financial Management Service — Exchange rates for foreign currency conversion
• Form 7004 — Application for automatic extension of time to file certain business income tax returns

Calculation Formulas Used

Verification and Quality Control

All calculations in this tool have been verified against the following:

• Sample calculations from the IRS Form 5472 instructions
• Published IRS guidance on foreign-related party reporting
• Treasury Financial Management Service exchange rate tables
• Current AFR rates published by the IRS
• IRC §6038A and §6038C statutory language

Each formula has been cross-referenced with the official IRS instructions to ensure accuracy. The tool uses the most current 2026 data available at the time of publication.

Limitations and Disclaimers