How Do Form 5472 Reference IDs Change After a Merger or Form 8832 Election?

November 13, 2026 · 2 min read

The IRS normally expects the same Form 5472 reference ID for the same foreign shareholder or related foreign party across tax years. A merger or acquisition involving that party can require a link between its old and new reference IDs. When a relevant foreign party makes a Form 8832 election, the first affected Form 5472 has a separate rule for entering that party's new EIN and its old reference ID.

What to check

A reference ID identifies a foreign shareholder or foreign related party for Form 5472 reporting. The reporting corporation establishes it directly or through its preparer. Preserve the prior filings and the assignment history, even if the person or entity no longer appears on the form. The instructions prohibit reassigning a retired ID to another party. After a qualifying election made for the foreign shareholder or related party, enter its new EIN and old reference ID in the corresponding Part II or Part III fields on the first affected filing. The IRS instructions require at least the EIN in later years for that party.

Example

Last year's Form 5472 identified an overseas corporate shareholder with reference ID OWNER01. Its merger records support assigning a new ID. Preserve OWNER01 in the records and apply the IRS correlation format when preparing the new filing. Confirm which entity the transaction involves before changing the U.S. reporting company's own EIN or the foreign party's identifying fields.

Before you proceed

Recover the exact prior reference ID from the submitted Form 5472.
Record the merger or election effective date and identify which foreign party it affects.
Check the current IRS instructions for which fields to complete and how to correlate IDs.

Can I give a new shareholder the reference ID of an owner who left?

No. Once an ID falls out of use, the IRS instructions prohibit reusing it to identify a different shareholder or related foreign party.