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Divorce is one of the most financially exposing events in a person’s life. UK family law requires both parties to provide a complete and frank account of their assets, income, trusts and offshore holdings. That disclosure is designed to achieve a fair division of assets between spouses. It also creates a detailed financial picture that HMRC can use as the starting point for a tax investigation.
For high-net-worth individuals with complex financial arrangements, divorce proceedings represent one of the most significant — and least anticipated — routes through which HMRC obtains intelligence about undisclosed or incorrectly reported wealth. Our tax advisors at Tax Accountant work with wealthy individuals and their advisers on tax investigations and voluntary disclosures, and the intersection between family law and tax compliance is an area where early specialist advice can make an enormous difference to the outcome.
Why Divorce Proceedings Are a Major Source of HMRC Intelligence
Family court financial proceedings in England and Wales operate under rules that require complete and honest disclosure. Each party must complete a Form E — a detailed financial statement covering all assets, income, liabilities, business interests, trust interests, pensions and property, both in the UK and overseas. Failure to disclose can result in penalties from the family court, adverse costs orders, or committal for contempt. The obligation is absolute and enforceable.
This creates a uniquely comprehensive financial picture. In many cases, the information disclosed in divorce proceedings goes significantly further than what a taxpayer has ever reported to HMRC. Offshore accounts, trust structures, undisclosed business interests, properties held through corporate vehicles and assets held overseas all routinely surface in financial remedy proceedings that would never otherwise come to HMRC’s attention.
HMRC is well aware of this. It actively monitors financial remedy proceedings as part of its intelligence-gathering strategy. HMRC’s Connect system — the data matching platform it uses to identify discrepancies between declared and actual wealth — draws on a wide range of information sources, and financial proceedings are a recognised source of leads for the Wealthy and Mid-Sized Business compliance teams.
How HMRC Accesses Information From Divorce Cases
HMRC cannot access confidential court documents simply by asking for them. However, several legitimate routes allow it to obtain and use information that emerges from divorce proceedings.
Where financial details are referred to in open court — in a hearing that is not held in private — those details become part of the public record. HMRC can use publicly available information directly. High-value financial remedy cases occasionally involve open hearings, and anything said or filed in an open context is accessible.
HMRC can also apply to the family court for permission to obtain documents disclosed in private proceedings. This route requires HMRC to demonstrate a legitimate investigative purpose, but the courts have shown willingness to grant access where there is evidence of potential tax non-compliance. The Supreme Court’s decision in Standish v Standish [2025] UKSC — a case involving nearly £80 million of assets and a disputed offshore trust arrangement — illustrated precisely how complex cross-border wealth structures surface in family proceedings and attract scrutiny from multiple directions simultaneously.
Even where HMRC cannot formally obtain documents, the information disclosed in divorce proceedings may reach it through other routes — through a tip-off from a professional involved in the case, through the other spouse or their advisers, or through the practical reality that once assets are identified and valued in family proceedings, the paper trail they create makes them far easier to trace through HMRC’s data systems.
What Types of Assets and Arrangements Are Most at Risk?
Divorce proceedings most commonly expose financial arrangements that have been kept private and that may not have been fully reported to HMRC. The most frequently encountered include offshore accounts and structures, trusts — whether UK or offshore — that have not been properly declared, undisclosed income from business interests or investments, property held through corporate vehicles, cryptocurrency holdings, and inheritance tax planning arrangements that were incompletely implemented or incorrectly documented.
Each of these carries its own tax compliance risk. An offshore trust that has not been reported to HMRC under the Trust Registration Service may attract penalties under the Money Laundering Regulations as well as a tax investigation. An undisclosed offshore account may result in an assessment under the Requirement to Correct legislation with penalties of up to 200% of the unpaid tax for non-compliant offshore matters. An IHT planning arrangement that was never completed — such as the intended offshore trust in the Standish case — may raise questions about whether the original asset transfers were properly reported and whether any tax reliefs claimed were correctly applied.
HMRC’s HMRC’s guidance on offshore matters and penalties sets out the penalty regime for offshore non-compliance in full. The penalties are substantially higher than for domestic matters and the time limits for HMRC to raise assessments are extended — up to twelve years for careless offshore errors and twenty years for deliberate ones.
The Contractual Disclosure Facility and Why Timing Matters
Where HMRC suspects deliberate tax fraud, it has the option of opening a Code of Practice 9 investigation — the most serious civil investigation route. Under COP9, HMRC invites the taxpayer to make a full disclosure through the Contractual Disclosure Facility. Accepting the CDF and making a complete, accurate and full disclosure protects against criminal prosecution. Rejecting the CDF or failing to disclose fully removes that protection and leaves the door open to criminal investigation.
The critical point for anyone whose financial affairs may be exposed through divorce proceedings is this: the CDF is only available where HMRC has not yet committed to a criminal investigation. Once HMRC has sufficient evidence to move to a criminal route — which may include evidence obtained from family court proceedings — the window for CDF protection closes. Acting voluntarily before HMRC makes contact is always significantly better than responding to a COP9 letter.
Our COP9 tax investigations team handles these cases and understands the precise conditions under which CDF protection applies. The difference between acting before and after HMRC contacts you can be the difference between a civil settlement and a criminal prosecution. The ICAEW has published useful commentary on HMRC’s approach to serious tax fraud investigations for those who want a broader professional perspective on how COP9 operates in practice.
Voluntary Disclosure: The Most Effective Protection
For wealthy individuals whose financial affairs may not be fully compliant — whether through historic omissions, complex structures that were not properly reported, or offshore arrangements that predate current reporting requirements — making a voluntary disclosure before any investigation is opened is the most effective form of protection available.
HMRC operates a number of disclosure facilities, the most relevant for offshore matters being the Worldwide Disclosure Facility. An unprompted disclosure — one made before HMRC has been in touch — attracts a penalty rate of between 0% and 30% of the unpaid tax for offshore matters. A prompted disclosure, made after HMRC has already indicated it is looking at a taxpayer’s affairs, attracts a penalty rate of between 15% and 100%. A non-disclosure, where HMRC raises an assessment following an investigation, attracts penalties of up to 200% in the most serious cases.
The practical consequence is straightforward. The earlier you act, the lower the penalty. Our HMRC disclosure facilities service manages voluntary disclosures from the initial review of the position through to final settlement with HMRC. We review all relevant assets and income, identify the correct tax treatment, calculate the underpayment and interest, and present the disclosure to HMRC in a way that achieves the best possible outcome.
The Tax Implications of Asset Transfers in Divorce
Beyond the investigation risk, divorce itself carries direct tax consequences that need careful planning. Transfers of assets between spouses are generally exempt from capital gains tax where they are living together — under TCGA 1992, section 58, transfers between cohabiting spouses are treated as no gain, no loss disposals. However, this exemption applies only while the parties are living together. Once separation occurs, the exemption continues only to the end of the tax year of separation. After that, normal CGT rules apply to transfers between the parties as part of the financial settlement.
From 6 April 2023, the rules changed to extend the no gain, no loss window. Separating spouses and civil partners now have up to three years from the end of the tax year of permanent separation to make no gain, no loss transfers. This is a significant extension from the previous position and gives more time to structure the financial settlement efficiently. Our personal capital gains tax service covers CGT planning around separation and divorce as a specific area of advice.
Stamp duty land tax may also apply to property transfers forming part of a financial settlement, depending on whether consideration is given and whether the property is subject to a mortgage. Inheritance tax can be affected by the dissolution of trusts or the redistribution of assets as part of a divorce settlement. Each of these needs to be considered alongside — not after — the family law process.
What Wealthy Individuals Should Do Now
If you are going through divorce proceedings, or if you anticipate that you might, the time to review your tax position is before your financial disclosure is prepared — not after it has been filed. Once the disclosure is made, the information it contains is in the hands of the court and potentially accessible to HMRC. Regularising your tax affairs in advance puts you in a significantly stronger position.
If you are not currently in divorce proceedings but hold complex financial arrangements — offshore structures, trusts, undisclosed accounts or assets, or inheritance tax planning that was never fully implemented — the same logic applies. The question is not whether HMRC will eventually access information about these arrangements through some route, but when. Acting voluntarily now is materially better than waiting.
Our team works with high-net-worth individuals and their family lawyers to coordinate the tax and legal elements of divorce, voluntary disclosures and HMRC investigation defence through our specialist tax services and tax appeals and disputes work. We also work alongside solicitors and barristers where complex financial structures need both legal and tax analysis.
If you are concerned that divorce proceedings or other civil litigation may expose your financial affairs to HMRC, or if you have undisclosed assets or income that need to be regularised, get in touch with our team as soon as possible. The options available to you narrow as time passes.
Updated April 2026 to reflect current HMRC investigation procedures, penalty regimes and CGT rules on separation.