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Equity and Trust – Mixing of Trust Funds and Trustee’s Funds
Introduction
A common issue in equitable tracing arises where a trustee wrongfully mixes trust money with personal funds in a bank account or uses the mixed fund to purchase assets. Equity recognises that beneficiaries should not lose their proprietary rights merely because trust money has been combined with the trustee’s own money. As a result, the beneficiaries may continue tracing into the mixed fund or into substitute assets purchased with it.
The law in this area aims to protect beneficiaries while preventing trustees from benefiting from their own wrongdoing. Equity therefore provides beneficiaries with several powerful proprietary remedies, including the right to claim a charge over the mixed fund or asset, or alternatively to claim ownership of the asset itself or a proportional share in it.
The Basic Rule
The general rule is that where a trustee mixes trust funds with personal money, the beneficiary may trace:
The claimant may obtain:
✅ an equitable charge over the fund or asset
for the amount of trust money used.
This gives the beneficiary security over the property and allows enforcement against the asset itself.
Case Scenario
Assume Daniel is trustee of the Carter Family Trust.
Daniel wrongfully removes:
£200,000
from the trust and mixes it with:
£300,000
of his own personal money in a bank account.
The mixed fund totals:
£500,000.
Daniel then uses the mixed money to purchase shares worth:
£500,000.
The shares later increase in value and become worth:
£1 million.
The beneficiaries seek recovery.
The Beneficiary’s Proprietary Rights
Equity allows the beneficiaries to trace their trust money into the purchased shares because the shares represent substitute property acquired using the mixed fund.
The beneficiaries may therefore seek proprietary remedies against the shares.
Equitable Charge
One possible remedy is an:
equitable charge
(or equitable lien).
This secures repayment of the trust money used in acquiring the asset.
Example
Trust Money Used
£200,000.
Shares Purchased
£500,000.
Shares Later Worth
£1 million.
Result
The beneficiaries may obtain:
✅ a charge securing repayment of £200,000,
plus potentially interest.
The beneficiaries become:
✅ secured creditors
to the extent of the charge.
Importance of the Charge
The equitable charge gives the beneficiaries significant advantages.
They may:
Because the beneficiaries possess a proprietary security interest, they rank ahead of ordinary unsecured creditors.
Taking the Asset Itself
An alternative remedy is that the beneficiaries may elect to take:
✅ the asset itself;
or
✅ a proportionate share in the asset.
This principle was recognised in:
Proportionate Share of the Asset
If the beneficiaries contributed only part of the purchase price, they may claim a proportional ownership share corresponding to the amount of trust money used.
Example
Trust Contribution
£200,000.
Total Purchase Price
£500,000.
Beneficial Share
The trust money funded:
40%
of the purchase.
Asset Value Later
£1 million.
Result
The beneficiaries may claim:
✅ 40% ownership of the shares
worth:
£400,000.
This may be far more valuable than merely recovering the original:
£200,000.
Foskett v McKeown
The leading authority is Foskett v McKeown.
In that case, the trustee wrongfully used trust money to pay premiums on a life insurance policy benefiting his children. After the trustee’s death, the policy paid out approximately:
£1 million.
The House of Lords held that the beneficiaries could trace into the insurance proceeds proportionately according to the amount of trust money used to pay the premiums.
Lord Millett explained that where trust money contributes to the acquisition of an asset, the beneficiary may choose either:
Backward Tracing
An important modern development occurred in Brazil v Durant International Corporation.
The Privy Council suggested that:
✅ backward tracing
may be possible.
Meaning of Backward Tracing
Traditional tracing usually requires:
Why This Matters
Modern banking systems allow rapid and complex movement of funds. Criminals can deliberately manipulate account timing to disguise the connection between transactions.
The Privy Council recognised that tracing should not fail merely because:
Example of Backward Tracing
Suppose Daniel contracts to purchase property using temporary borrowing.
One day later, he transfers misappropriated trust money into the account to repay the borrowing.
Under traditional tracing rules, tracing may fail because the property purchase occurred before receipt of the trust money.
However, under backward tracing principles, the court may still permit tracing if the transactions formed part of one coordinated scheme.
Importance of Brazil v Durant
The case reflects the courts’ increasing willingness to adapt equitable tracing principles to modern financial realities and sophisticated fraud structures.
Although the decision came from the Privy Council and is therefore not formally binding in England, it remains highly persuasive and influential.
Relationship With Other Tracing Rules
This area operates alongside several important tracing doctrines.
Re Hallett
Presumes trustees spend personal money first.
Re Oatway
Allows beneficiaries to trace into investments purchased from mixed funds where the remaining balance has been dissipated.
Roscoe v Winder
Limits tracing claims to the lowest intermediate balance remaining in an account.
Foskett v McKeown
Allows proportional proprietary ownership of substitute assets and increases in value.
Practical Importance
These principles are highly important in cases involving:
Key SQE Principles
Where trust funds are mixed with the trustee’s own funds:
✅ beneficiaries may trace into the mixed fund or substitute asset.
They may choose between:
Conclusion
Where trustees mix trust funds with personal money, equity protects beneficiaries by allowing tracing into the mixed fund and substitute assets purchased from it. Beneficiaries may obtain either an equitable charge securing repayment or a proportionate proprietary share of the asset itself, including any increase in value. Modern developments such as backward tracing further demonstrate equity’s willingness to adapt tracing principles to contemporary financial realities and sophisticated fraud structures. Together, these doctrines form a central part of modern equitable proprietary remedies and tracing law.
Sources of Reference
Foskett v McKeown [2001] 1 AC 102 (HL).
Brazil v Durant International Corporation [2015] 3 WLR 599 (PC).
Re Hallett’s Estate (1880) 13 Ch D 696 (CA).
Re Tilley’s Will Trusts [1967] Ch 1179.
Alastair Hudson, Equity and Trusts (11th edn, Routledge 2022).
James Penner, The Law of Trusts (12th edn, OUP 2020).
Graham Virgo, The Principles of Equity and Trusts (5th edn, OUP 2024).
John McGhee (ed), Snell’s Equity (35th edn, Sweet & Maxwell 2024).
Introduction
A common issue in equitable tracing arises where a trustee wrongfully mixes trust money with personal funds in a bank account or uses the mixed fund to purchase assets. Equity recognises that beneficiaries should not lose their proprietary rights merely because trust money has been combined with the trustee’s own money. As a result, the beneficiaries may continue tracing into the mixed fund or into substitute assets purchased with it.
The law in this area aims to protect beneficiaries while preventing trustees from benefiting from their own wrongdoing. Equity therefore provides beneficiaries with several powerful proprietary remedies, including the right to claim a charge over the mixed fund or asset, or alternatively to claim ownership of the asset itself or a proportional share in it.
The Basic Rule
The general rule is that where a trustee mixes trust funds with personal money, the beneficiary may trace:
- into the mixed fund itself;
- or into any asset purchased using the mixed fund.
The claimant may obtain:
✅ an equitable charge over the fund or asset
for the amount of trust money used.
This gives the beneficiary security over the property and allows enforcement against the asset itself.
Case Scenario
Assume Daniel is trustee of the Carter Family Trust.
Daniel wrongfully removes:
£200,000
from the trust and mixes it with:
£300,000
of his own personal money in a bank account.
The mixed fund totals:
£500,000.
Daniel then uses the mixed money to purchase shares worth:
£500,000.
The shares later increase in value and become worth:
£1 million.
The beneficiaries seek recovery.
The Beneficiary’s Proprietary Rights
Equity allows the beneficiaries to trace their trust money into the purchased shares because the shares represent substitute property acquired using the mixed fund.
The beneficiaries may therefore seek proprietary remedies against the shares.
Equitable Charge
One possible remedy is an:
equitable charge
(or equitable lien).
This secures repayment of the trust money used in acquiring the asset.
Example
Trust Money Used
£200,000.
Shares Purchased
£500,000.
Shares Later Worth
£1 million.
Result
The beneficiaries may obtain:
✅ a charge securing repayment of £200,000,
plus potentially interest.
The beneficiaries become:
✅ secured creditors
to the extent of the charge.
Importance of the Charge
The equitable charge gives the beneficiaries significant advantages.
They may:
- force sale of the asset;
- recover directly from sale proceeds;
- and obtain priority over unsecured creditors.
Because the beneficiaries possess a proprietary security interest, they rank ahead of ordinary unsecured creditors.
Taking the Asset Itself
An alternative remedy is that the beneficiaries may elect to take:
✅ the asset itself;
or
✅ a proportionate share in the asset.
This principle was recognised in:
- Re Tilley’s Will Trusts
- Foskett v McKeown
Proportionate Share of the Asset
If the beneficiaries contributed only part of the purchase price, they may claim a proportional ownership share corresponding to the amount of trust money used.
Example
Trust Contribution
£200,000.
Total Purchase Price
£500,000.
Beneficial Share
The trust money funded:
40%
of the purchase.
Asset Value Later
£1 million.
Result
The beneficiaries may claim:
✅ 40% ownership of the shares
worth:
£400,000.
This may be far more valuable than merely recovering the original:
£200,000.
Foskett v McKeown
The leading authority is Foskett v McKeown.
In that case, the trustee wrongfully used trust money to pay premiums on a life insurance policy benefiting his children. After the trustee’s death, the policy paid out approximately:
£1 million.
The House of Lords held that the beneficiaries could trace into the insurance proceeds proportionately according to the amount of trust money used to pay the premiums.
Lord Millett explained that where trust money contributes to the acquisition of an asset, the beneficiary may choose either:
- a proportionate share of the asset;
or - an equitable lien securing repayment.
Backward Tracing
An important modern development occurred in Brazil v Durant International Corporation.
The Privy Council suggested that:
✅ backward tracing
may be possible.
Meaning of Backward Tracing
Traditional tracing usually requires:
- trust money to move first;
- followed by acquisition of the asset.
- the debit appears before the credit;
- provided the transactions formed part of a coordinated scheme.
Why This Matters
Modern banking systems allow rapid and complex movement of funds. Criminals can deliberately manipulate account timing to disguise the connection between transactions.
The Privy Council recognised that tracing should not fail merely because:
- banking transactions occur non-chronologically.
Example of Backward Tracing
Suppose Daniel contracts to purchase property using temporary borrowing.
One day later, he transfers misappropriated trust money into the account to repay the borrowing.
Under traditional tracing rules, tracing may fail because the property purchase occurred before receipt of the trust money.
However, under backward tracing principles, the court may still permit tracing if the transactions formed part of one coordinated scheme.
Importance of Brazil v Durant
The case reflects the courts’ increasing willingness to adapt equitable tracing principles to modern financial realities and sophisticated fraud structures.
Although the decision came from the Privy Council and is therefore not formally binding in England, it remains highly persuasive and influential.
Relationship With Other Tracing Rules
This area operates alongside several important tracing doctrines.
Re Hallett
Presumes trustees spend personal money first.
Re Oatway
Allows beneficiaries to trace into investments purchased from mixed funds where the remaining balance has been dissipated.
Roscoe v Winder
Limits tracing claims to the lowest intermediate balance remaining in an account.
Foskett v McKeown
Allows proportional proprietary ownership of substitute assets and increases in value.
Practical Importance
These principles are highly important in cases involving:
- fraud;
- mixed bank accounts;
- investment assets;
- insolvency;
- fiduciary wrongdoing;
- and asset recovery litigation.
Key SQE Principles
Where trust funds are mixed with the trustee’s own funds:
✅ beneficiaries may trace into the mixed fund or substitute asset.
They may choose between:
- an equitable charge securing repayment;
or - a proportional ownership share in the asset itself.
Conclusion
Where trustees mix trust funds with personal money, equity protects beneficiaries by allowing tracing into the mixed fund and substitute assets purchased from it. Beneficiaries may obtain either an equitable charge securing repayment or a proportionate proprietary share of the asset itself, including any increase in value. Modern developments such as backward tracing further demonstrate equity’s willingness to adapt tracing principles to contemporary financial realities and sophisticated fraud structures. Together, these doctrines form a central part of modern equitable proprietary remedies and tracing law.
Sources of Reference
Foskett v McKeown [2001] 1 AC 102 (HL).
Brazil v Durant International Corporation [2015] 3 WLR 599 (PC).
Re Hallett’s Estate (1880) 13 Ch D 696 (CA).
Re Tilley’s Will Trusts [1967] Ch 1179.
Alastair Hudson, Equity and Trusts (11th edn, Routledge 2022).
James Penner, The Law of Trusts (12th edn, OUP 2020).
Graham Virgo, The Principles of Equity and Trusts (5th edn, OUP 2024).
John McGhee (ed), Snell’s Equity (35th edn, Sweet & Maxwell 2024).
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