Individual Savings Accounts (ISAs) represent one of the most popular tax-efficient savings vehicles in the UK, offering protection from Income Tax and Capital Gains Tax on investments and interest. However, many ISA holders remain unclear about what happens to their carefully accumulated savings when they pass away. Understanding ISA inheritance rules is crucial for effective estate planning and ensuring your loved ones can benefit from your financial foresight.
The treatment of ISAs after death involves specific regulations that differ significantly from other types of investments and savings accounts. These rules affect not only the deceased's estate but also provide unique opportunities for surviving spouses and civil partners through the Additional Permitted Subscription (APS) allowance. Proper knowledge of these regulations can help maximise the benefits for your beneficiaries while minimising potential tax implications.
This comprehensive guide examines the key aspects of ISA inheritance, from the immediate changes that occur upon death to the long-term options available to beneficiaries. Whether you are planning your own estate or dealing with the inheritance of a loved one's ISA, understanding these processes is essential for making informed financial decisions.
What Happens Immediately
When an ISA holder dies, their account undergoes immediate and significant changes that affect both its status and the options available to beneficiaries. The ISA transforms into what is officially termed a ‘continuing deceased's account', which operates under specific rules designed to preserve the tax benefits while facilitating the estate administration process.
Immediate Status Changes
Upon death, the ISA automatically becomes a continuing deceased's account and retains all its existing tax benefits. This means that any income generated or capital gains realised within the account remain free from Income Tax and Capital Gains Tax. However, the account can no longer receive new contributions, effectively freezing its ability to grow through additional deposits.
The continuing deceased's account will remain open and invested for a maximum period of three years and one day from the date of death. This extended timeframe provides flexibility for estate administration and allows beneficiaries time to make informed decisions about the inherited assets. According to government regulations, the ISA provider will automatically close the account after this period if no action has been taken by the executor or estate administrator.
Closure Conditions
The ISA may be closed before the three-year deadline under specific circumstances. The executor of the estate has the authority to close the account at any time during the administration process. Additionally, the ISA will automatically close when the administration of the estate is completed, regardless of whether the three-year period has elapsed.
During the period when the ISA remains open as a continuing deceased's account, all investments within it continue to benefit from tax protection. This preservation of tax benefits represents a significant advantage, as it allows the estate to maintain the tax-efficient status that the deceased worked to build over their lifetime.
Estate and Tax Implications
While the ISA maintains its tax benefits during the continuation period, the total value of the ISA forms part of the deceased's estate for Inheritance Tax purposes. This inclusion means that if the total estate value exceeds the current Inheritance Tax threshold of £325,000, the ISA value contributes to any potential 40% tax liability on the excess amount.
For surviving spouses and civil partners, any money inherited is typically free from Inheritance Tax due to the spousal exemption. However, other beneficiaries may face Inheritance Tax implications if the total estate value crosses the threshold. This distinction makes the relationship between the deceased and the beneficiary a crucial factor in determining the overall tax treatment of the inheritance.

APS Explained
The Additional Permitted Subscription (APS) allowance represents one of the most valuable benefits available to surviving spouses and civil partners of deceased ISA holders. This special allowance effectively enables the surviving partner to inherit the tax-efficient benefits of their deceased partner's ISA, even if they do not directly inherit the ISA assets themselves.
Eligibility and Entitlement
The APS allowance is exclusively available to surviving spouses and civil partners, regardless of whether they actually inherit the ISA assets or whether the assets are distributed to other beneficiaries. This universal entitlement for qualifying relationships ensures that the tax-efficient savings culture built by couples can continue even after one partner's death.
The allowance applies to all types of ISAs, including Cash ISAs, Stocks and Shares ISAs, and Innovative Finance ISAs. This flexibility allows surviving partners to choose the most appropriate investment vehicle for their circumstances and risk tolerance when utilising their APS allowance.
Calculation of APS Value
The APS allowance amount is calculated based on the higher of two values: the total value of the deceased's ISA on the date of death or the value when the ISA is eventually closed. This calculation method protects beneficiaries from market fluctuations that might reduce the ISA value between the date of death and the closure date.
For example, if an ISA was worth £50,000 on the date of death but market conditions caused its value to fall to £45,000 by the time it was closed, the APS allowance would still be based on the original £50,000 value. Conversely, if the ISA value increased to £55,000 by closure, the APS allowance would reflect this higher amount.
Time Limits and Usage
The APS allowance must be utilised within specific time constraints to maintain its validity. Surviving spouses and civil partners have up to three years from the date of death to use their allowance, or 180 days after the completion of estate administration, whichever period is longer. This extended timeframe acknowledges that estate administration can be complex and time-consuming.
The allowance can be used to make additional contributions beyond the standard annual ISA limit. These contributions can be made to existing ISAs or used to open new ISA accounts that accept APS contributions. The flexibility to split the allowance across different ISA types enables survivors to diversify their tax-efficient savings according to their financial goals and risk preferences.
Practical Application
When using the APS allowance, survivors can add these funds to Cash ISAs, Stocks and Shares ISAs, or Innovative Finance ISAs, depending on their investment preferences and the offerings of their chosen provider. The allowance operates independently of the standard annual ISA contribution limit, effectively providing additional tax-efficient savings capacity.
It is important to note that not all ISA providers automatically accept APS contributions, so survivors should verify with their chosen provider that they can accommodate these special contributions. Some providers may require specific documentation or forms to process APS contributions correctly.
Transfer Process
The transfer of ISA assets following death involves several distinct pathways, each with different implications for beneficiaries and varying levels of complexity. Understanding these options enables executors and beneficiaries to make informed decisions that align with their financial objectives and circumstances.
Direct Investment Transfer
For Stocks and Shares ISAs, one of the most straightforward options involves transferring the actual investments rather than converting them to cash. This approach is most feasible when the beneficiary's ISA is held with the same provider as the deceased's account, as it eliminates the need for complex inter-provider transfers.
When both accounts are with the same provider, the transfer process typically involves moving the investments directly into the surviving spouse's or civil partner's existing ISA. This method preserves the investment positions and avoids the potential market timing risks associated with selling and repurchasing investments.
If the beneficiary uses a different ISA provider, direct investment transfer may still be possible if the new provider offers exactly the same investment funds as those held in the deceased's ISA. However, this scenario is less common and may require additional coordination between providers.
Cash Conversion Process
The alternative approach involves liquidating the ISA investments and distributing the proceeds as cash to the estate's beneficiaries. This process can be initiated by the executor or administrator of the estate, who instructs the ISA provider to sell all investments and transfer the resulting funds according to the will or intestacy rules.
Cash conversion offers several advantages, including simplicity of distribution and the ability to divide proceeds among multiple beneficiaries. However, this approach also means that the money loses its tax-protected status once the ISA is closed and the funds are distributed. Future growth on these assets will be subject to normal Income Tax and Capital Gains Tax rules.
The timing of cash conversion can significantly impact the final amount available for distribution, particularly for Stocks and Shares ISAs where market conditions may affect investment values. Executors should consider market conditions and seek appropriate advice when deciding on the optimal timing for liquidation.

Temporary Retention Strategy
The third option involves maintaining the ISA as a continuing deceased's account for the full three-year period, allowing investments to remain in their tax-protected environment while beneficiaries consider their long-term options. This approach can be particularly valuable during volatile market conditions or when beneficiaries need time to make informed decisions about their inheritance.
During the retention period, investments continue to benefit from tax-free income and capital gains, potentially allowing the ISA value to grow without tax implications. However, beneficiaries should remember that investment values can decrease as well as increase, and there is no guarantee that delaying distribution will result in better outcomes.
Documentation and Administrative Requirements
Regardless of the chosen transfer method, specific documentation is typically required to process ISA inheritance. This usually includes the death certificate, grant of probate or letters of administration, and identification documents for beneficiaries. ISA providers may also require completion of specific forms related to the inheritance process.
Executors should contact the ISA provider as soon as possible after death to understand their specific requirements and begin the transfer process. Early communication can help prevent unnecessary delays and ensure that all options remain available to beneficiaries.
The transfer process may also involve coordination with other financial institutions if the deceased held multiple ISAs or if beneficiaries wish to consolidate inherited assets with their existing accounts. Professional advice from financial advisers or solicitors can be valuable in navigating complex estate situations and ensuring optimal outcomes for all beneficiaries.
Understanding what happens to your ISA when you die is crucial for effective estate planning and ensuring your loved ones can maximise the benefits of your tax-efficient savings. The transformation of ISAs into continuing deceased's accounts, the availability of APS allowances for surviving spouses and civil partners, and the various transfer options available to beneficiaries all represent important considerations in the inheritance process.
The three-year continuation period provides valuable flexibility for estate administration while preserving the tax benefits that make ISAs attractive savings vehicles. For surviving spouses and civil partners, the APS allowance offers a unique opportunity to maintain and even expand their tax-efficient savings capacity beyond normal annual limits.
The choice between direct investment transfer, cash conversion, or temporary retention depends on individual circumstances, market conditions, and the specific needs of beneficiaries. Each approach offers distinct advantages and potential drawbacks that should be carefully considered in consultation with appropriate professional advisers.
Proper planning and understanding of these inheritance rules can help ensure that the tax-efficient benefits of ISAs continue to benefit your loved ones long after your death, making these accounts not just valuable savings tools during your lifetime, but also important components of your legacy planning strategy.