What is an HMRC nudge letter?

A nudge letter is a letter from HMRC asking the taxpayer to review their tax affairs and disclose any offshore income or gains that have not been reported. It is typically sent after HMRC receives information through international information exchange. An HMRC nudge letter is a letter sent to a taxpayer asking them to review their tax affairs and disclose any offshore income or gains that have not been properly reported. The letter typically: (1) States that HMRC has received information about the taxpayer's offshore affairs (through international information exchange). (2) Does not specify what information HMRC has or what the taxpayer's alleged irregularities are. (3) Asks the taxpayer to review their self-assessment returns and check whether all offshore income and gains have been reported. (4) Advises the taxpayer to make a disclosure if they find any irregularities, using the Worldwide Disclosure Facility (WDF). (5) Warns that if the taxpayer does not respond, HMRC may open an investigation. Nudge letters are based on information HMRC receives through: (a) Common Reporting Standard (CRS) — automatic exchange of financial account information between 100+ countries. (b) FATCA — exchange of information between the US and the UK. (c) Bilateral information exchange agreements. (d) Other sources of offshore information. The nudge letter is HMRC's way of encouraging voluntary disclosure without opening a formal investigation. However, receiving a nudge letter should be taken seriously, as it means HMRC has information about the taxpayer's offshore affairs. Relevant legislation: Finance Act 2016, Schedule 18 (WDF — disclosure after nudge letter); Common Reporting Standard (CRS) regulations; FATCA agreement. Example: A taxpayer receives a nudge letter from HMRC stating that HMRC has received information about their offshore affairs. The taxpayer has a foreign bank account with undeclared interest income. The letter asks the taxpayer to review their returns and make a disclosure if necessary. The taxpayer should seek specialist advice and consider making a voluntary disclosure through the WDF. Common mistake: Ignoring the nudge letter, thinking it is a generic mailshot. Nudge letters are targeted — they are sent because HMRC has specific information about the taxpayer's offshore affairs. Ignoring the letter can result in a formal investigation.

Why did I receive an HMRC nudge letter?

You received a nudge letter because HMRC has received information about your offshore affairs through international information exchange (CRS, FATCA, or bilateral agreements). The information suggests you may have undisclosed offshore income or gains. HMRC sends nudge letters based on information received through international information exchange: (1) Common Reporting Standard (CRS) — under CRS, financial institutions in 100+ countries automatically report information about financial accounts held by non-residents to their local tax authority, which then exchanges the information with the account holder's tax authority. For example, a UK resident with a bank account in France will have their account information reported by the French bank to the French tax authority, which then exchanges it with HMRC. (2) FATCA — under the US-UK FATCA agreement, UK financial institutions report information about US account holders to HMRC, which exchanges it with the IRS. Similarly, US financial institutions report information about UK account holders to the IRS, which exchanges it with HMRC. (3) Bilateral agreements — the UK has bilateral information exchange agreements with many countries, allowing the exchange of tax information on request or automatically. (4) Other sources — HMRC also receives information from offshore leaks (e.g., Panama Papers, Paradise Papers), whistleblowers, and other sources. When HMRC receives information suggesting that a taxpayer may have undisclosed offshore income, it sends a nudge letter to encourage voluntary disclosure. The letter does not specify what information HMRC has (to prevent the taxpayer from tailoring their disclosure), but it puts the taxpayer on notice that HMRC is aware of their offshore affairs. Relevant legislation: Common Reporting Standard (CRS) regulations; International Tax Compliance Regulations 2015; FATCA agreement; bilateral tax information exchange agreements. Example: A UK resident has a bank account in Spain with £50,000 of interest income that they have not declared. Under CRS, the Spanish bank reports the account information to the Spanish tax authority, which exchanges it with HMRC. HMRC sends a nudge letter to the taxpayer, asking them to review their returns and disclose if necessary. Common mistake: Assuming that HMRC does not know about your offshore accounts. With CRS and FATCA, HMRC receives automatic information about financial accounts in 100+ countries. It is increasingly difficult to keep offshore accounts secret.

What should I do if I receive an HMRC nudge letter?

Seek specialist advice immediately. Your options are: (1) Confirm your returns are correct (if you have no undeclared income). (2) Make a voluntary disclosure through the WDF (if you have undeclared income). (3) Do not ignore the letter — HMRC may follow up with an investigation. If you receive an HMRC nudge letter, you should: (1) Seek specialist advice — engage a tax adviser experienced in offshore matters. They can assess your position, advise on the best response, and manage the disclosure process. (2) Review your tax returns — check whether all offshore income and gains have been properly reported. Your adviser can help with this review. (3) Response options: (a) If your returns are correct — write to HMRC confirming that you have reviewed your returns and they are correct. No further action is needed, but keep the letter and your response on file. (b) If you have undeclared income — make a voluntary disclosure through the Worldwide Disclosure Facility (WDF). Your adviser can help you register, calculate the tax, interest, and penalties, and file the disclosure. (c) If you are unsure — seek advice before responding. It may be better to make a disclosure (to be safe) than to confirm your returns are correct (and risk HMRC finding errors later). (4) Do not ignore the letter — if you do not respond within the stated timeframe (typically 30 days), HMRC may follow up with a formal investigation, which can be more extensive and costly. (5) Do not lie — if you have undeclared income, do not write to HMRC confirming your returns are correct. This is a false statement and can be used as evidence of deliberate behaviour, resulting in higher penalties. Relevant legislation: Finance Act 2016, Schedule 18 (WDF); FA 2007, Schedule 24 (penalties for false statements). Example: A taxpayer receives a nudge letter. They engage a tax adviser, who reviews their returns and identifies £30,000 of undeclared foreign dividend income. The adviser helps the taxpayer make a voluntary disclosure through the WDF, calculating the tax, interest, and penalties. The disclosure is filed and accepted by HMRC. The taxpayer regularises their affairs with lower penalties than if HMRC had investigated. Common mistake: Replying to the nudge letter without specialist advice, confirming that the returns are correct when they are not. This is a false statement and can result in higher penalties (for deliberate behaviour) and potential prosecution.

Can I make a voluntary disclosure after receiving a nudge letter?

Yes, but the disclosure will be 'prompted' (not unprompted), which means higher penalty ranges. However, a prompted disclosure still results in lower penalties than if HMRC discovers the irregularities through an investigation. Seek specialist advice before disclosing. After receiving a nudge letter, the taxpayer can still make a voluntary disclosure through the Worldwide Disclosure Facility (WDF). However, the disclosure will be 'prompted' (because HMRC has already contacted the taxpayer), which affects the penalty framework: (1) Prompted disclosure — the nudge letter is a 'prompt' from HMRC, so any subsequent disclosure is 'prompted'. Prompted disclosures have higher penalty ranges than unprompted disclosures. For example, for careless behaviour, the range is 0-30% (prompted) vs 0-30% (unprompted), but the starting point for the penalty is higher for prompted. For deliberate behaviour, the range is 20-70% (prompted) vs 20-100% (unprompted) — the prompted range is actually lower at the top, but the starting point is higher. (2) Still better than investigation — a prompted disclosure still results in lower penalties than if HMRC discovers the irregularities through a formal investigation. With a prompted disclosure, the taxpayer can still benefit from reductions for the quality of the disclosure (telling, helping, giving access). (3) Reduced risk of prosecution — making a disclosure (even a prompted one) can reduce the risk of criminal prosecution, as it shows a willingness to cooperate. (4) Specialist advice — the taxpayer should seek specialist advice before making a disclosure, to ensure the disclosure is full and complete, and to negotiate the lowest possible penalties. The adviser can also assess whether the WDF is the appropriate route or whether another route (e.g., the CDF under COP9) is more appropriate. Relevant legislation: FA 2007, Schedule 24 (prompted vs unprompted disclosure); FA 2016, Schedule 18 (WDF — prompted disclosure). Example: A taxpayer receives a nudge letter and makes a prompted disclosure through the WDF. The additional tax is £50,000, and the behaviour is careless. The penalty range is 0-30% (prompted). With a full disclosure and cooperation, the penalty is 20% = £10,000. If HMRC had discovered the irregularity through an investigation (without any disclosure), the penalty might be 30% = £15,000. The prompted disclosure saves £5,000 in penalties. Common mistake: Assuming that a prompted disclosure is not worth making because the penalties are higher than an unprompted disclosure. A prompted disclosure is still better than HMRC discovering the irregularities through an investigation. The taxpayer should always make a disclosure if they have undeclared income, regardless of whether it is prompted or unprompted.

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HMRC Nudge Letters: What to Do

HMRC nudge letters are sent to taxpayers with suspected offshore income. Understand what they mean, your response options, and the risks of ignoring them.

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HMRC nudge letters are sent to taxpayers who HMRC believes may have undisclosed offshore income or gains. The letters are typically sent after HMRC receives information from foreign tax authorities (through international information exchange). Receiving a nudge letter is a serious matter — it means HMRC has information about the taxpayer's offshore affairs and expects a response. Understanding what a nudge letter means and how to respond is essential for taxpayers with offshore income.

What a Nudge Letter Is

A nudge letter is a letter from HMRC asking the taxpayer to review their tax affairs and disclose any offshore income or gains that have not been reported. The letter typically states that HMRC has received information about the taxpayer's offshore affairs (without specifying what) and asks the taxpayer to check their returns and make a disclosure if necessary.

Why HMRC Sends Nudge Letters

HMRC sends nudge letters when it receives information about taxpayers' offshore affairs through international information exchange, including: (1) Common Reporting Standard (CRS) — automatic exchange of financial account information between 100+ countries. (2) FATCA — exchange of information between the US and other countries. (3) bilateral information exchange agreements. HMRC uses the information to identify taxpayers who may have undeclared offshore income and sends nudge letters to encourage voluntary disclosure.

Your Response Options

When you receive a nudge letter, you have several options: (1) Do nothing — not recommended, as HMRC may follow up with an investigation. (2) Reply confirming your returns are correct — if you have no undeclared offshore income, you can confirm your returns are correct. (3) Make a voluntary disclosure — if you have undeclared offshore income, you can use the Worldwide Disclosure Facility (WDF) to disclose and regularise your affairs. (4) Seek specialist advice — a tax adviser can assess your position, advise on the best response, and manage the disclosure process.

The Risks of Ignoring a Nudge Letter

Ignoring a nudge letter is risky: (1) HMRC may follow up with a formal investigation, which can be more extensive and costly. (2) If HMRC discovers undeclared income, the penalties will be higher (prompted disclosure, with higher penalty ranges). (3) If the behaviour was deliberate, HMRC may consider criminal prosecution. (4) The taxpayer loses the opportunity to make a voluntary (unprompted) disclosure, which would have resulted in lower penalties. The best course of action is to seek specialist advice and respond promptly.

Key Points

What You Need to Know

Nudge letters are sent to taxpayers with suspected offshore income
HMRC receives offshore information through CRS, FATCA, and bilateral agreements
The letter asks the taxpayer to review their returns and disclose if necessary
Options: confirm returns are correct, make a voluntary disclosure, or seek advice
Ignoring a nudge letter can result in higher penalties and formal investigation

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