10/07/2026
The IRS is strengthening its international whistleblower efforts, and this is another sign of how much more connected cross-border tax enforcement is becoming.
The IRS announced that it worked with the United Kingdom’s tax authority, HMRC, to help develop its new Strengthened Reward Scheme, modeled in part on the expertise of the IRS Whistleblower Office.
The programs encourage people with specific and credible information about serious tax violations to come forward, potentially in exchange for a monetary award.
The types of conduct the IRS specifically identifies are significant:
• Undeclared foreign bank accounts and FBAR violations
• Assets hidden through foreign trusts, foundations, financial instruments or anonymous entities
• Money laundering
• Transfer pricing manipulation and improper cross-border profit shifting
What stands out to me us as a tax law firm is the increasing coordination between tax authorities.
Offshore accounts, foreign entities and cross-border transactions do not exist in isolation anymore. Information can come from financial institutions, foreign governments, information returns, whistleblowers and other sources.
That does not mean having a foreign account or foreign assets is improper. U.S. taxpayers can absolutely have them. The problems arise when required income, accounts, assets or entities are not properly reported.
We see taxpayers who discover years later that they had U.S. reporting obligations they did not understand. The first step is determining exactly what happened, what should have been reported, what the IRS already knows, and whether the failure was willful or non-willful. Those facts can significantly affect how the problem should be addressed.
International tax compliance is becoming increasingly interconnected. This new U.S.-UK partnership is another example.
Source: https://www.irs.gov/newsroom/irs-highlights-partnership-with-uk-tax-authoritys-new-whistleblower-program
IR-2026-120, Oct. 7, 2026 — The Internal Revenue Service today highlighted its partnership with the United Kingdom’s whistleblower program, which drew upon the IRS Whistleblower Office’s expertise to quickly get established.