HMRC Whistleblower Reward Lawyer

PRACTICES

International Whistleblower Advocates helped HMRC build the whistleblower reward program, and can guide you through the process of reporting tax evasion or fraud, and applying for rewards.

HMRC whistleblower rewards are real — 15% to 30% of the tax collected, with no stated upper cap, when your information leads to the recovery of £1.5 million or more.

But under the UK’s Strengthened Reward Scheme, every reward is paid at HMRC’s discretion. No entitlement, no US-style appeal rights, no second chance to fix a weak submission.

Whether you are ever paid depends heavily on decisions made before you report — which is why the most important step an HMRC whistleblower can take is retaining experienced reward counsel first.

International Whistleblower Advocates connects tax whistleblowers with the lawyers best positioned to win these claims. If you have information about serious tax evasion, request a free, confidential case review before you contact HMRC or anyone else.

Representation From the Firm Behind the Model HMRC Is Copying

IWA refers HMRC whistleblower reward cases to Kohn, Kohn & Colapinto, the Washington, DC firm whose founding partners helped build the US whistleblower reward system that the HMRC program is modelled on. Their results define the field:

The $104 million Birkenfeld award. The firm represented UBS banker Bradley Birkenfeld, whose disclosures broke Swiss banking secrecy and produced one of the largest individual whistleblower rewards in history under the US IRS program.
The Danske Bank whistleblower. The firm represents Howard Wilkinson, the British trader who exposed the largest money laundering scandal ever uncovered — and whose case shows both what international whistleblowers can achieve and why identity protection must come first.
Decades shaping the law itself. Founding partner Stephen M. Kohn, who also leads IWA’s global advocacy, has spent his career turning discretionary whistleblower programs into ones that actually pay — precisely the problem HMRC whistleblowers face today.

Representation is on a contingency basis: there are no fees unless you recover a reward, and the initial consultation is free and confidential. Start your confidential case review.

Why Retain a Lawyer Before Reporting to HMRC

The HMRC whistleblower reward program adopted the US reward percentages without the US legal rights behind them. In the United States, qualifying whistleblowers are entitled to awards by statute and can appeal underpayment to a court. Under the HMRC reward scheme, payment is discretionary — and that gap defines the legal strategy:

Your submission is your only argument. HMRC’s process is one online form with strict character limits, no attachments, and a no-contact policy afterward. There is no meeting to explain your evidence and no supplementing a thin report. Counsel’s first job is making that single filing specific, credible, and impossible to set aside.
A written agreement may be the key to securing a discretionary reward. The single most valuable move available to an HMRC whistleblower is to seek a formal written agreement with HMRC — negotiated by counsel before full disclosure — setting out the terms of cooperation, the basis for calculating the reward, and the conditions of payment. No entitlement, no US-style appeal rights, no second chance to fix a weak submission. This is not a step to attempt alone.
Eligibility is easily destroyed. Anonymous reports forfeit the reward entirely. HMRC instructs whistleblowers not to gather evidence unlawfully — doing so risks both your claim and personal liability. Information HMRC already holds pays nothing, making timing and originality decisive. Counsel keeps you inside the lines before you have unknowingly crossed them.
Your case may be worth more in the United States. If the fraud touches US taxpayers, US banks, or US markets, you may qualify under the IRS, SEC, CFTC, or anti-money laundering reward programs — which pay mandatory awards to whistleblowers of any nationality. Wilkinson’s Danske Bank case reached US authorities because the money moved through US correspondent banks. Only counsel practicing in the US programs can evaluate that side of your case and sequence disclosures to protect eligibility in every forum.
UK protections are thin. The Public Interest Disclosure Act 1998 leaves you to litigate against your employer after retaliation happens. A confidentiality and protection strategy must exist before your first disclosure is made — not assembled after a leak.

What Your HMRC Reward Lawyer Will Do

Evaluate your information against the reward scheme’s £1.5 million threshold and exclusion rules before anything is filed;
Assess parallel eligibility under US reward programs and sequence your disclosures accordingly;
Draft the HMRC submission for maximum credibility within the form’s limits;
Pursue a written reward agreement with HMRC on your behalf;
Protect your identity with a confidentiality strategy built before disclosure; and
Advocate for a reward at the top of the 15%–30% range when the recovery is made.

Common Questions

How much does an HMRC whistleblower reward lawyer cost?

Nothing up front. Leading whistleblower firms work on a no-win, no-fee contingency basis: the lawyer receives a percentage of your reward if and when you are paid, and nothing otherwise. Rewards exist partly for this reason — they let individual insiders retain world-class counsel against powerful institutions.

Do I need a UK solicitor to claim an HMRC reward?

No. The HMRC reward scheme is an administrative reporting program, not court litigation, and no solicitor or barrister is required to file. What the claim demands is experience with how reward programs evaluate whistleblowers — experience built in the US programs HMRC is copying. Where UK proceedings or UK-specific advice become necessary, international firms coordinate with local counsel.

Can I get a reward if I report anonymously?

No. HMRC accepts anonymous reports but pays no rewards on them — you must provide your contact details to qualify. The role of counsel is to keep your report confidential rather than anonymous: HMRC knows your identity, but its exposure is controlled and protected. For full eligibility rules, see our guide to the HMRC Whistleblower Reward Scheme.

Speak With an HMRC Whistleblower Reward Lawyer

The decisions you make before reporting — where to file, what to include, how to protect your identity, and whether to seek a written reward agreement — can determine whether HMRC ever pays you. Get those decisions right the first time. Request your free, confidential case review with the firm behind the largest tax whistleblower rewards in history.