A bank or safe deposit provider will not let anyone into a safe deposit box once they know the box holder has died – not a spouse, not a named next of kin, not even someone holding a spare key. Access is frozen in the same way a bank account is frozen, and it stays frozen until the person dealing with the estate can produce the right legal document.
This guide explains who can get access, what documents you need, how contents are treated for inheritance tax, and what happens if the box was held jointly or the box holder died without a will.
The short answer
| Situation | What happens to access |
|---|---|
| Sole box holder, with a will | Access is frozen until the executor produces a Grant of Probate |
| Sole box holder, no will | Access is frozen until the administrator produces Letters of Administration |
| Joint box holders | The surviving holder can usually continue to access the box – check the provider's own terms, as this varies by bank |
| Access via power of attorney | Ends immediately on death – an attorney has no further right to access the box once the holder has died |
Whatever is inside the box – jewellery, share certificates, cash, documents – counts as part of the deceased’s estate and needs to be valued alongside bank accounts and shares and investments.
Why the box is frozen
Banks and safe deposit providers apply the same principle to a safe deposit box that they apply to a bank account: once they are notified of a death, they will not deal with the deceased’s assets except through whoever has the legal authority to administer the estate. This protects the estate – and the bank – from the box being emptied by someone who turns out not to be entitled to its contents.
Metro Bank’s own Safe Deposit Box terms and conditions set this out explicitly. Under the heading “Access after your death”, the terms state that for personal customers, if the box holder dies, the bank “will not allow anyone else to access the Safe Deposit Box, unless they provide us with a valid legal document (e.g., a grant of probate or letters of administration appointing them as the executor or administrator of your estate).” The same terms confirm that if someone had access under a power of attorney, “their right to access your Safe Deposit Box will cease after your death” – a lasting power of attorney only operates while the donor is alive.
This matches the position UK law firm Russell-Cooke describes for safety deposit boxes generally: access is only possible once a Grant of Probate has been issued, at which point the executor presents the grant, identification, and a letter of authority to the bank.
Detailed breakdown by scenario
Sole box holder, with a valid will
If the deceased left a valid will naming an executor, the executor applies to the Probate Registry for a Grant of Probate. Once issued, the executor takes the original grant (or an official copy), photo identification, and a letter of authority – a signed document confirming they are acting for the estate – to the bank or provider. The provider will then arrange a supervised appointment for the box to be opened and its contents recorded.
Our guide to how to apply for probate covers the application process in full, including timescales and costs.
Sole box holder, no will (intestacy)
If there is no will, there is no executor, so someone entitled under the intestacy rules must apply for Letters of Administration instead. Once granted, the administrator has the same legal authority as an executor would have had, and follows the same process with the bank: grant, identification, and letter of authority. Our guide to letters of administration explains who can apply and in what order of priority.
The document required differs depending on whether there’s a will (Grant of Probate) or not (Letters of Administration), but the practical process at the bank is the same either way. See our comparison of grant of probate vs letters of administration if you’re not sure which applies.
Joint box holders
Many safe deposit boxes are held jointly – commonly by spouses or civil partners. Where a box has more than one named holder, the surviving holder can usually continue to access the box without needing to wait for a grant, similar to how a joint bank account passes to the surviving account holder by survivorship. That said, this depends entirely on the individual provider’s terms and how the box was set up, so it’s worth checking directly with the bank or provider rather than assuming. If the surviving holder later needs to deal with the deceased’s share of the contents as part of the estate, they will still need to account for it in the estate valuation.
Access under a power of attorney
A power of attorney is only ever valid during the donor’s lifetime, so it has no effect once they have died. If someone had been given access to the box under a lasting power of attorney while the box holder was alive, that authority lapses at the moment of death. The attorney would need to apply for a Grant of Probate or Letters of Administration in their own right (if they are also the executor or an administrator) to regain access.
What you need to do
| Step | What it involves |
|---|---|
| 1. Notify the bank or provider | Tell them the box holder has died, ideally with a copy of the death certificate. This freezes access immediately, if it hasn't already been frozen. |
| 2. Apply for the right grant | Grant of Probate if there's a will, Letters of Administration if there isn't. Both are applied for through the Probate Registry. |
| 3. Prepare a letter of authority | A signed document confirming you are acting for the estate, presented alongside the grant and your identification. |
| 4. Book an appointment to open the box | The bank will usually require a supervised appointment. If the key has been lost, ask the provider what their process is – some require a locksmith at the executor's expense. |
| 5. Record and value the contents | List everything found, and get a professional valuation for anything that may be worth more than £1,500, following the same approach as valuing any other household or personal possessions for probate. |
| 6. Include the contents in the estate | Add the valued contents to the estate for inheritance tax purposes. If the box is opened after the estate has already been valued and reported to HMRC, you may need to submit a corrective account. |
Do the contents count towards inheritance tax?
Yes. Anything found in a safe deposit box – jewellery, cash, share certificates, or other valuables – forms part of the deceased’s estate, just like the contents of a house or a bank account, and must be valued and reported to HMRC. Because a safe deposit box’s contents are often unknown to anyone but the deceased until the box is opened, it’s common for a box to be opened after the initial estate valuation has already been submitted. If that happens and the contents change the value of the estate, the executor or administrator needs to submit a corrective account and pay any additional inheritance tax due.
For a full walkthrough of how personal possessions are valued for probate – including when you need a professional valuer rather than an estimate – see gov.uk’s guide to valuing an estate.
Common questions
Can a bank tell you what’s in a deceased person’s safe deposit box before you get probate?
No. Banks typically have no record of what’s inside a box – they only rent the space – so there is nothing to disclose even if they wanted to. The only way to find out what’s inside is to open it, which requires the Grant of Probate or Letters of Administration first.
What if the box holder lost the only key?
You’ll need to ask the provider about their process for a lost key. Most safe deposit boxes require two keys – the holder’s key and one held by the bank – and losing the holder’s key usually means the box has to be drilled or opened by a locksmith, at the estate’s expense, once the executor or administrator has the necessary authority.
Does a small or low-value estate still need a grant to access a safe deposit box?
Generally, yes. Unlike some bank accounts, which providers may release below a certain balance without a grant, a safe deposit box’s contents are unknown until it’s opened, so providers are unlikely to make a discretionary exception in the way they sometimes do for small cash balances. Check with the specific provider, but expect to need the grant regardless of how modest you think the contents are.
What happens to outstanding rental fees on the box?
Any unpaid rental fees for the box become a debt of the estate, alongside other ongoing contracts and subscriptions. The executor or administrator should settle these once they have access to estate funds.
Sources
- Metro Bank – Safe Deposit Box Terms and Conditions (section 17, “Access after your death”)
- Russell-Cooke – Gaining access to safety deposit boxes when owner dies
- gov.uk – Applying for probate
- gov.uk – Valuing the estate of someone who died: estimate the estate’s value
For more on dealing with an estate more broadly, see our guides to letters of administration, grant of probate vs letters of administration, what happens to a storage unit, and what happens to different assets when someone dies.