The IRS Says It Helped Britain Build a Tax Whistleblower Scheme. Its Own Awards Can Take a Decade.

The IRS used a news release on October 7 to publicise something unusual: a foreign tax authority's whistleblower programme. Release IR-2026-120 says His Majesty's Revenue and Customs drew on the IRS Whistleblower Office's expertise in establishing its Strengthened Reward Scheme, which launched in November 2025 and targets serious avoidance and evasion by the wealthiest individuals and largest businesses.

The release carries no figures. What it carries is a claim about cross-border reach, and two quotes.

By working together, we can strengthen our efforts to tackle tax avoidance and evasion.

Frank J. Bisignano, the IRS Chief Executive Officer, said the collaboration will help deter large-scale, cross-border tax evasion, and that the two authorities' joint work will have a far-reaching global impact on international financial fraud. The release also notes that informants under either programme need not be US or UK citizens or residents, and that a whistleblower may qualify for a monetary award when information leads to the collection of taxes or other proceeds.

What the IRS programme actually pays, and when

The release does not set out the mechanics. The agency's own publication does. IRS Publication 5251, revised August 2026, states that the IRS generally pays at least 15 percent and not more than 30 percent of the proceeds collected from a whistleblower's information. That percentage is reduced where the information came from public sources, or where the whistleblower planned and initiated the non-compliance.

The $2 million threshold

Two figures decide which track a claim follows. For the mandatory award provisions, proceeds in dispute must exceed $2,000,000, and where the subject is an individual, that person's gross income must exceed $200,000 for any taxable year covered by the action. Submissions that do not meet both criteria are considered under the discretionary programme instead, where an award is possible but not required.

Collected proceeds is broader than tax

Proceeds include penalties, interest, additions to tax and additional amounts under the internal revenue laws. They also include proceeds under other laws the IRS administers, enforces or investigates, such as criminal fines, civil forfeitures and violations of reporting requirements.

The timeline is the part that gets least attention

Publication 5251 includes a process map with the agency's own general estimates for each stage. Read end to end, it explains why tax whistleblower cases are measured in years:

1. Intake and initial review: generally 30 to 90 days.
2. Subject matter expert evaluation: generally 90 days.
3. Field examination: generally one to three years.
4. Appeals and court: generally three to ten years.
5. Initial award evaluation: generally 60 days, followed by a preliminary award recommendation in generally 90 days.
6. Final determination: generally 30 to 60 days, then award payment processing of generally 30 to 90 days.

A payment cannot be issued until the tax determination is final, the award is determined, and either all appeals are final or the whistleblower has signed a waiver. Monitoring for payment may run the full ten-year collection statute. A claimant who disagrees with a final award determination may petition the US Tax Court; the publication estimates that route at about three to six years on its own.

Filing requirements

Claims must be submitted online on Form 211, Application for Award for Original Information. The form requires a written narrative, supporting evidence, a description of any evidence the whistleblower does not control, an account of how the whistleblower learned the information, and a statement of their relationship to the subject. The declaration must be signed by the whistleblower under penalty of perjury; a representative cannot sign it for them.

On confidentiality, Publication 5251 points to section 6103, which requires the Whistleblower Office to keep returns and return information confidential, and to a provision withholding information whose disclosure would seriously impair federal tax administration. Telephone inquiries receive only an open-or-closed answer. Status requests must be in writing, mailed, and must meet specific criteria.