HMRC Disclosure Facilities: Worldwide Disclosure Facility Guide

If you have undisclosed offshore income, gains, or assets that should have been reported to HMRC, the Worldwide Disclosure Facility (WDF) provides a structured route to regularise your position voluntarily. Voluntary disclosure is almost always preferable to waiting for HMRC to discover the issue — the penalty reductions available for unprompted disclosure can be substantial, and HMRC's data-gathering capabilities have improved dramatically in recent years through the Common Reporting Standard (CRS), FATCA, and the Crypto-Asset Reporting Framework (CARF).

This guide explains how the WDF works, who it is suitable for, what information you need to prepare, and how to manage the process effectively.

What Is the Worldwide Disclosure Facility?

The WDF is an HMRC online facility that allows taxpayers with offshore tax issues to disclose those liabilities and make a settlement. It is not a special amnesty — it does not provide reduced tax rates or waive interest. However, it does allow the taxpayer to make an "unprompted" disclosure, which attracts significantly lower penalties than if HMRC discovers the issue and opens a formal enquiry.

The WDF was launched in September 2016 and has been the primary offshore disclosure route since then. It replaced earlier facilities including the Liechtenstein Disclosure Facility and the Crown Dependencies Disclosure Facilities, which are now closed.

There is no formal deadline for using the WDF — it remains open as a rolling facility. However, the longer you delay disclosure, the greater the risk that HMRC will identify the issue independently (at which point any disclosure becomes "prompted" rather than "unprompted" and attracts higher penalties).

Who Is the WDF For?

The WDF is designed for individuals (and companies) who have a UK tax liability arising from offshore matters that has not been correctly reported to HMRC. Common scenarios include:

• Undisclosed foreign bank account interest or income from accounts in Switzerland, Channel Islands, Cayman Islands, UAE, or elsewhere
• Offshore investment portfolio income and gains not reported on UK tax returns
• Rental income from overseas property not declared to HMRC
• Undisclosed foreign business income from a non-UK business where the individual is UK-resident
• Distributions from offshore trusts not correctly reported
• Cryptocurrency held on non-UK exchanges with undisclosed gains
• UK property gains incorrectly excluded from NRCGT reporting
• Inheritance from overseas estates where UK IHT was not correctly assessed

The WDF is not appropriate for disclosures relating to purely domestic UK tax issues (e.g., failure to declare UK employment income). Those should be handled via HMRC's self-assessment or the Digital Disclosure Service (DDS) instead.

The WDF Process: Step by Step

Step 1: Register on the WDF portal

You (or your adviser) register using the HMRC online facility. You will need a Government Gateway ID. Upon registration, HMRC issues a unique reference number which you use throughout the process. The registration itself does not commit you to any specific disclosure — it begins a 90-day window during which you must complete and submit the disclosure.

Step 2: Gather your records

Before submitting, you need to collate all relevant information:

• The years in question (HMRC can typically go back 4 years for careless errors, 6 years for errors, and 20 years for fraud or deliberate concealment — though offshore matters have specific rules that can extend the assessment period)
• The amounts of undisclosed income, gains, or assets for each year
• Copies of relevant bank statements, investment records, trust accounts, and tax returns
• Records of any tax paid overseas that may be creditable against the UK liability

Step 3: Calculate the tax, interest, and penalties

This is the technical core of the WDF process and almost always requires professional assistance. You will need to calculate:

• The UK income tax, CGT, or IHT attributable to each undisclosed item for each year
• Statutory interest on late-paid tax (HMRC's late payment interest rate, which since 6 April 2025 is set at 4% above the Bank of England base rate — 7.75% as of January 2026)
• The penalty applicable to each year's underpayment

Step 4: Submit the disclosure

The disclosure is submitted online via the WDF portal. It must be complete and accurate — submitting an incomplete disclosure and later amending it risks being treated as a prompted disclosure for the amended elements.

Step 5: Pay the amount due

HMRC expects payment of the full amount (tax, interest, and penalties) at the time of disclosure, or within a short period after acceptance. In some cases, a time-to-pay arrangement can be negotiated, but HMRC is not obliged to agree to one.

Penalties Under the WDF

The penalties framework for offshore matters under the WDF depends on:

1. Whether the disclosure is unprompted or prompted. If you come forward before HMRC has made contact about the matter, your disclosure is "unprompted" and attracts lower penalties. If HMRC has already written to you, any disclosure is likely to be "prompted."

2. The territory classification. HMRC classifies offshore territories into three categories based on their willingness to exchange information with HMRC:

   • Category 1: Countries with a strong information exchange agreement (e.g., EEA members, USA, Australia). Lower penalty floors.
   • Category 2: Countries with some information exchange agreement (e.g., many offshore centres). Medium penalty floors.
   • Category 3: Countries that are uncooperative or non-compliant (the list changes over time). Higher penalty floors.

3. The nature of the error. Careless errors attract lower penalties than deliberate ones; deliberate concealment attracts the highest penalties.

For a typical unprompted disclosure of careless offshore errors relating to a Category 1 territory, penalties may range from 10% to 30% of the unpaid tax. For deliberate errors in a Category 3 territory, penalties can reach 200% of the unpaid tax. Unprompted disclosure offers a reduction of up to 30% off the penalty compared with a prompted disclosure.

Naming. HMRC has a power to publish the details of offshore tax defaulters where the total potential lost revenue exceeds £25,000. This "naming and shaming" power is not exercised in all cases, and HMRC generally has discretion, but it is a factor to consider for high-value disclosures.

The Requirement to Correct (RTC) and Its Legacy

In 2017, HMRC introduced the Requirement to Correct (RTC), which required UK taxpayers with offshore tax liabilities to correct those liabilities by 30 September 2018. Failure to do so triggered "failure to correct" (FTC) penalties, which are substantially higher than standard offshore penalties:

• Minimum FTC penalty: 100% of the unpaid tax
• Maximum: 200% of the unpaid tax
• Plus an additional 10% penalty where assets are moved out of a compliant jurisdiction after 16 November 2016

The FTC penalties can still apply to disclosures made now if the underlying liability predates October 2018 and was not corrected by the RTC deadline. This means that for older undisclosed liabilities, the total penalty exposure can be very high — sometimes exceeding the tax owed.

The FTC penalties framework is one of the strongest arguments for using the WDF promptly. The longer the delay, the higher the penalty exposure.

Who Should Use the WDF vs Other Routes?

The WDF is one of several routes available for regularising UK tax positions:

Digital Disclosure Service (DDS): For domestic UK tax issues without an offshore element. Simpler than the WDF for purely domestic matters.

Let Property Campaign: A specific campaign for undisclosed UK rental income. Simpler than the WDF for straightforward rental income omissions.

HMRC voluntary restitution: In some cases, particularly where a taxpayer has already received a discovery assessment from HMRC, it may be more appropriate to respond to that assessment than to use the WDF.

Self-assessment amendments: For relatively recent errors (within the amendment window), correcting via the self-assessment system may be appropriate if the issue is straightforward.

For most offshore matters, particularly those involving multiple years, complex calculations, or uncertain penalty positions, the WDF with professional representation is the appropriate route.

Practical Advice: How to Manage the Process

Appoint a specialist tax adviser immediately. WDF disclosures are complex and high-stakes. A specialist with experience of voluntary disclosure procedures is essential. Look for advisers with membership of CIOT or ATT and specific experience of offshore enquiries.

Do not attempt a partial disclosure. The WDF only provides penalty mitigation for what is actually disclosed. A partial disclosure that fails to capture all liabilities is worse than no disclosure at all — it converts the undisclosed remainder into a "prompted" disclosure with higher penalties.

Preserve all records. Do not destroy any financial records, however old, while a potential disclosure is under consideration. Document destruction that appears deliberate can raise the level of culpability HMRC attributes to you.

Consider the IHT dimension. If undisclosed offshore assets are part of an estate that has already been administered, the WDF may need to address IHT as well as income tax and CGT. This adds complexity.

Act before CRS and CARF data arrives. Under CRS, financial institutions in over 100 jurisdictions report data to HMRC annually. Under the forthcoming CARF, crypto exchanges globally will do the same from 2027. Once HMRC receives data about your account, any disclosure becomes "prompted." The window for unprompted disclosure is closing year by year.

How Global Investments Can Help

Global Investments does not provide tax advice directly, but we work with a network of specialist UK tax advisers and solicitors who regularly handle WDF disclosures. If you believe you may have undisclosed offshore tax liabilities — from any period of UK residence — we can facilitate an introduction to the appropriate professionals to assess your position in confidence.

We can also work with you to ensure your current investment structure is compliant, properly documented, and positioned to avoid the same issues arising in future. Contact our team for a confidential initial conversation.

This article is for general information only. Nothing here constitutes legal or tax advice. Tax rules are complex and change frequently. Always seek independent professional guidance tailored to your circumstances. Disclosure decisions have serious financial and potentially legal consequences — take advice before taking action.