We’ll help you reach the right service fast. If you manage a family trust or are handling an estate after someone has died, the quickest route is the Trust Registration Service (TRS) on GOV.UK — where trustees register, update and close trust records. Since the 5th Money Laundering Directive, all UK express trusts (including bare trusts) must be registered on the TRS within 90 days of creation, so knowing how to deal with HMRC efficiently is essential.
We explain simple, practical steps to avoid being bounced between helplines and forms. We set out when to use the online register, when a phone call helps, and when post is the right approach.
You’ll learn which identifiers matter — such as the URN or UTR — and why missing them causes delays. We also clarify what the service can and cannot discuss, especially for protected records with limited access.
Our focus is on plain language and clear actions. Expect concise checklists and tips to prevent lockouts, repeat calls and slow replies. We also outline the difference between routine trust administration and a formal data request, which follows stricter rules under data protection legislation.
Key Takeaways
- Use the Trust Registration Service online for routine updates — it is the fastest route for most trust administration.
- Keep your URN or UTR to hand to avoid unnecessary delays.
- Phone is best for urgent queries and security changes; post for formal notices and original documents.
- Protected records limit what HMRC can discuss and with whom.
- Prepare all details before making contact to reduce repeat calls and wasted time.
Who to contact at HMRC for trusts and estates
Start by using the online Trust Registration Service — it is designed for everyday trust administration, keeps records accurate and avoids needless delays. For most trustees, the “Register and Maintain a Trust” service on GOV.UK is the primary route. It handles routine updates, annual declarations and security checks. A separate process exists for estate administration after death (the Tell Us Once service and probate), but this article focuses on trusts.
Who should make the enquiry
Day-to-day actions are usually carried out by the trustees themselves, an appointed agent (such as an accountant) or a solicitor acting with formal authorisation. We recommend agreeing early on who will take the lead — this avoids duplicate submissions and slow replies. Remember, a trust is a legal arrangement, not a separate legal entity. The trustees are the legal owners of the trust property, which means the responsibility for dealing with HMRC falls squarely on them.
What the lead trustee does
Lead trustee means the person named on the TRS registration who can claim and manage the trust record online. Even if an agent prepares the submissions, the lead trustee must complete the initial registration and security verification.
- Practical tip: keep one consistent route for all updates — this reduces back-and-forth with HMRC and keeps your records tidy.
- HMRC will generally refuse to discuss trust details with anyone other than the lead trustee or a formally authorised agent, to protect sensitive data.
| Role | Who acts | Typical action |
|---|---|---|
| Trustees | Lead trustee | Claim the TRS record and complete security verification |
| Agent | Appointed adviser (e.g. accountant) | Prepare and submit returns; requires formal authorisation from trustees |
| Solicitor | Legal representative | Draft trust deed amendments; client (trustee) completes Government Gateway sign-in |
HMRC trust contact options: online TRS, telephone and post
Choose the right route — online, by phone or by post — so you don’t waste time on the wrong process. Each channel suits different situations.
Using the GOV.UK “Register and Maintain a Trust” service
The GOV.UK service “Manage your trust’s details” is the main route for routine trust administration. Most actions — initial registration, making changes to trustee or beneficiary details, submitting annual declarations and closing a trust record — are quickest when done online.
Use the online service when you have your URN or UTR to hand. That single reference number helps the system locate the correct trust record straight away. It is worth noting that the TRS register itself is not publicly accessible (unlike Companies House), so only authorised users can view or amend records.
Calling the TRS helpline to change security details
If you cannot receive access codes because the registered telephone number has changed, a phone call is usually needed. The TRS helpline for this specific scenario is 0300 123 1072.
Phone is best for security updates that block online access. Expect identity checks — HMRC will verify the lead trustee’s name, date of birth and possibly National Insurance number before staff will update any details.
When to send a letter and what to include
Send a letter if you must provide original documents (such as a certified copy of a death certificate or trust deed) or want a paper trail for formal confirmations.
Always include the URN or UTR, the lead trustee’s full name, date of birth and a clear description of the action you are requesting. Missing identifiers are the single biggest cause of delays with postal correspondence.
| Situation | Best route | What to include |
|---|---|---|
| Routine updates (trustee changes, address changes, annual declarations) | Online (GOV.UK) | URN/UTR, Government Gateway sign-in details, summary of the change |
| Changed telephone number blocking online access | Telephone helpline (0300 123 1072) | Lead trustee name, date of birth, old and new telephone number |
| Providing original documents or formal confirmations | Letter by post | URN/UTR, copies of evidence, signed declaration by lead trustee |
What information to have ready before you contact HMRC
Before you call or log in, gather a short bundle of key documents so the process is quick and straightforward. Preparation is the single most effective way to avoid repeat calls and wasted time.
Finding and safeguarding your URN or UTR
After successful TRS registration, the lead trustee receives a letter from HMRC containing the Unique Reference Number (URN) or the Unique Taxpayer Reference (UTR) if the trust is taxable. The URN is a 15-character alphanumeric code (for example ABTRUST12345678). The UTR is a 10-digit number (for example 1234567890). Non-taxable trusts — such as a Family Home Protection Trust that holds the family home but generates no income — will typically receive only a URN.
Keep that number safe. Store the letter securely alongside your trust deed and share a copy with your solicitor or accountant for backup. If you lose it, you will need to call the TRS helpline and pass identity checks to recover it.
Personal details you should have to hand
Have the lead trustee’s full name, date of birth, National Insurance number and current telephone number ready. HMRC checks these against the original registration to verify identity. Make sure everything matches exactly — even a slight name variation (such as using a middle name that wasn’t on the original registration) can cause delays.
Trust-level details that help trace the record
Note the trust’s full name (as stated in the trust deed), key dates such as the date the trust was created, and the registered contact address. If the trust holds property, have the property address and any Land Registry title numbers to hand as well. These help HMRC staff find the right record if identifiers are unclear.
“A clear checklist stops delays and repeated calls.”
- Checklist: URN/UTR, lead trustee name, date of birth, NI number, address, phone number, trust name, date of creation.
- Safeguard the registration letter alongside the trust deed; give a copy to your solicitor.
- Agree early on who will be the main point of contact with HMRC on behalf of the trust.
How to claim a trust on the Trust Registration Service (TRS)
Claiming the record is the vital first step that allows the lead trustee to manage the trust registration online. Without claiming the record, you cannot view or update trust details. We guide you to the correct GOV.UK page and explain what happens at each stage.
Accessing the GOV.UK service
Open the “Manage your trust’s details” or “Register and Maintain a Trust” service on GOV.UK. Click through when you are ready to sign in or to create Government Gateway sign-in details. Bookmark the page — you will return to it regularly for annual declarations and updates.
Government Gateway and choosing the right account
Create Government Gateway sign-in details if you don’t already have them. Select an Organisation account when acting on behalf of the trust. This is important — choosing an Individual account causes common permission problems later and may prevent you from managing the trust record properly.
Security, access codes and timing
Access codes usually arrive by email and expire after 30 minutes. You can also receive codes by text or automated phone call. Use a device you have immediate access to — if the code expires, you will need to request a new one, which adds unnecessary delay.
Entering the URN/UTR and avoiding lockouts
Type the URN or UTR exactly as shown on your HMRC registration letter. A single typo — even a misplaced space — can cause a failed attempt.
Warning: three incorrect answers triggers a 30-minute lockout. Pause and double-check your details rather than guessing. If you are locked out, wait the full 30 minutes before trying again.
Answering security questions
Have the lead trustee’s name, date of birth and National Insurance number ready. You may also need details of another person linked to the trust — such as a co-trustee, the settlor or a named beneficiary — so all answers must match the information on the original registration exactly.
“Claim clearly and carefully — it saves time and prevents avoidable lockouts.”
- Claim the record so the lead trustee can manage the trust online going forward.
- Choose an Organisation account and check your inbox promptly when requesting access codes.
- Enter the URN/UTR and security answers exactly as registered to avoid the 3-attempt lockout.
Need help acting as an agent? See our practical advice for agents at registering a trust as an agent.
How to manage and update trust details after registration
A short, consistent routine for updates keeps trust administration manageable and ensures you stay compliant with HMRC requirements.
Within the TRS, choose “Make changes to the Trust and declare” to edit records. This is the single action that lets you amend trust details without hunting through menus.
Updating people and contact information
Use the service to change a trustee (for example, when a trustee retires or a new one is appointed), add or remove a beneficiary, update settlor information, or amend contact details such as addresses and telephone numbers. Be precise — even small mismatches between the TRS record and the information you provide can block later verification steps.
Keep to the 90-day rule
Changes must be recorded on the Trust Registration Service within 90 days of the event occurring. This is a legal obligation, not just best practice. Set a reminder whenever something changes — treat it like paying a household bill — so updates do not build up and become a compliance headache.
Practical tips and simple records
- Note the change date, who made the update, and where you filed supporting evidence (such as a trustee appointment deed).
- Examples of changes to record: new trustee address, phone number update, a trustee stepping down (retiring), a new beneficiary being born, or the settlor’s death.
- Keep a dated log alongside the trust deed so you can show exactly what was changed and when — this is invaluable if HMRC ever queries the record.
| Change | Where in the service | What to include |
|---|---|---|
| New trustee appointed | Make changes to the Trust and declare | Full name, date of birth, NI number, date of appointment |
| Beneficiary update | Make changes to the Trust and declare | Name, class of beneficiary (for discretionary trusts) or specific entitlement, reason for change |
| Contact details | Make changes to the Trust and declare | Updated address, telephone, email and date of change |
“Accurate details and a short, dated record save time and avoid repeat compliance checks.”
Taxable trusts: getting help with Income Tax, Capital Gains and annual obligations
Some trusts generate taxable income or capital gains, and those trigger extra filing duties for trustees. Understanding whether your trust is taxable — and what you need to file — is essential for avoiding penalties. Not every family trust will be taxable: for example, a discretionary trust holding the family home that generates no rental income may have no income tax or capital gains tax to pay. But the TRS registration and annual declaration obligations still apply regardless of whether there is a tax liability.
How to tell if the trust is taxable
If the trust record carries a UTR rather than only a URN, that usually means HMRC has identified the trust as having a potential tax liability. A UTR is the signal that income or gains may need reporting. Common scenarios include trusts holding buy-to-let properties (rental income), trusts with investment portfolios (dividends and interest), or trusts that have recently disposed of an asset at a gain. Trust income tax rates are currently 45% for non-dividend income and 39.35% for dividends (with the first £1,000 taxed at the basic rate). Trust capital gains tax (CGT) is currently 24% on residential property gains and 20% on other assets, with the annual exempt amount set at half the individual allowance.
Annual declaration and the 31 January date
Every year, trustees of registered trusts must submit an annual declaration by 31 January. This confirms that the names, addresses and other details on the TRS register are still accurate and up to date.
Even if nothing has changed during the year, you must still submit the declaration on time. Treat the date like an annual household bill and set a reminder well in advance to avoid last-minute problems.
When to file the SA900 return
Where the trust has a tax liability — whether income tax or capital gains tax — trustees must also file the Self Assessment Trust and Estate Tax Return (SA900) via GOV.UK. The deadline for online filing is 31 January following the end of the tax year (so 31 January 2026 for the 2024/25 tax year). Paper returns must be filed by the earlier deadline of 31 October.
Use the official guidance on trusts and capital gains tax to check whether an SA900 form is required for your trust. If the trust holds property and you are considering holdover relief on a disposal, you may also want to review our guide to the hold-over relief form.
Penalties and when to get advice
Deliberate failure to keep the TRS register updated can lead to penalties of up to £5,000. Late filing of SA900 returns incurs automatic penalties starting at £100, escalating with further delays. Small administrative errors can snowball into larger compliance problems if left unaddressed.
“Keep records current and seek professional advice when there are property gains, complex income distributions or any situation where you are unsure of the trust’s tax position.”
- Check whether your trust has a UTR or only a URN — this tells you whether tax returns may be needed.
- Submit the annual declaration by 31 January each year without fail, even if nothing has changed.
- Get professional advice when there are gains on property, rental income, or unclear distributions to avoid under-reporting.
How to close (deregister) a trust with HMRC via TRS
Deciding the correct closure date is the key step before you complete the deregistration process online. Getting this right avoids follow-up queries from HMRC.
Confirming the closure date and what counts as assets distributed
Choose the date when all trust assets have been formally appointed out to beneficiaries and the trustees no longer hold anything on trust. In a discretionary trust, this means the trustees have exercised their power of appointment to distribute all remaining assets to one or more beneficiaries.
Examples: the date a property transfer completes at the Land Registry, or the day the final funds leave the trust bank account and reach the beneficiaries. If there is a potential exit charge under the relevant property regime, take advice before distributing — for most family trusts where the value is within the nil rate band (currently £325,000), the exit charge will be zero, but it is always worth confirming with your solicitor or accountant.
Checking details are up to date before closing
Update all names, addresses, identifiers and contact numbers on the TRS record first.
Closing the trust record with outdated details can trigger follow-up questions from HMRC and slow the deregistration process unnecessarily.
Completing the declaration and saving proof of deregistration
Use the TRS service to complete the deregistration declaration. Print or save the confirmation page immediately.
Keep that declaration as carefully as you would a property completion statement. Store a copy with the trust deed and share it with your solicitor’s records. This proof may be needed years later if HMRC raises any queries.
Authorising an agent or solicitor to manage closure
If you prefer, the lead trustee can authorise an agent or solicitor to close the trust record on their behalf. This is particularly useful in bereavement situations where the lead trustee has died and a replacement trustee needs to handle the closure.
Even with professional help, the URN or original HMRC registration letter is often needed to complete the closure smoothly, so make sure it is accessible.
| Step | What to do | Why it matters |
|---|---|---|
| Choose closure date | Set the date all assets were fully distributed to beneficiaries | Provides a clear legal cut-off for trustee liabilities and any exit charges |
| Check details | Confirm all names, addresses and identifiers are current | Prevents follow-up checks and delays from HMRC |
| Complete declaration | Submit the deregistration and save proof | Evidence for future enquiries or records — keep with trust deed |
| Authorise agent | Grant formal access to a solicitor or authorised agent | Useful in bereavement, incapacity or complex multi-asset cases |
“Save the deregistration proof and share it with your adviser — it avoids trouble later.”
When to use a trust data request instead of contacting HMRC about administration
Not all information is available through day-to-day administration — sometimes a formal data request is required. It is important to understand the distinction, because using the wrong channel wastes time.
What a trust data request is: it is a formal route to access limited records held on the TRS about a trust’s beneficial ownership. Only registered trusts are eligible. Being registered does not automatically mean the information will be shared — strict criteria must be met.
Legitimate interest requests
These are for specific investigations relating to money laundering or terrorist financing. The person or organisation making the request must demonstrate why the information is needed and how it directly relates to the investigation. Routine curiosity about a trust’s beneficiaries does not qualify.
Offshore company requests and controlling interest
Requests linked to an offshore company apply where the trust holds a controlling interest — generally more than 50% of shares or effective control of the company. In this context, “offshore” means entities outside the UK that fall within certain regulatory categories. These requests follow a separate, stricter process.
What information may be shared
- For individuals: name, month and year of birth, country of residence, nationality and their role in the trust arrangement (trustee, settlor, beneficiary, etc.).
- For organisations: name, country of residence and role in the trust arrangement.
Do not use a data request simply to check your own trust’s registration status or to take over administration — use the online TRS service or the TRS helpline for that.
Practical tip: if you are making a legitimate data request, include the trust name, URN or UTR, any linked company details and any land or property references so the request is traceable and can be processed efficiently. For general guidance on acting as a trustee see our page on registering a trust as a trustee.
Reasons HMRC may not respond as expected and how to avoid delays
Most slow replies trace back to missing references or mismatched personal details. Understanding the common pitfalls helps you avoid them.
Common issues that stall progress
Missing identifiers (no URN or UTR included), wrong name formats (using a shortened name instead of the full name on the registration) or an incorrect telephone number often stop HMRC’s system from matching your enquiry to the right record. Security protocols require exact details, so even a small mismatch can block action entirely.
Insufficient evidence is another common cause. If HMRC cannot trace the trust record from the information you have supplied, the request will pause or be returned to you for clarification.
Protections for at-risk people
Safeguards exist where sharing information would expose someone to fraud, harassment, violence or other harm. Data is also withheld in cases involving under-18s or individuals lacking mental capacity. If any beneficiary or connected person is at risk, HMRC will apply additional protections to the record, which may limit what can be disclosed even to authorised enquirers.
After you submit: what to expect
HMRC issues a confirmation email with a submission reference number. They aim to respond within about 8 weeks for formal data requests. Routine TRS updates processed online are usually confirmed much faster. If information is withheld due to an exemption, you can request a review within 30 days of receiving HMRC’s letter.
“Check identifiers first, keep copies of everything you send, and diarise follow-up timeframes so nothing falls through the cracks.”
| Problem | What to check | Quick fix |
|---|---|---|
| Missing identifier | URN or UTR, HMRC reference number | Locate original HMRC registration letter; add identifier to submission |
| Mismatched details | Name format, address, date of birth | Use the exact details as they appear on the original TRS registration |
| Insufficient evidence | Supporting documents, property references | Attach clear copies with dates; include Land Registry title numbers if applicable |
Delay-busters: check identifiers first, use consistent details that match the registration exactly, keep copies of everything you send, and diarise a follow-up date. For forms such as a hold-over relief form, make sure the reference numbers and names match exactly across all documents.
Conclusion
Take one steady step at a time: confirm who leads trust administration, then use the online TRS service to make changes promptly and keep the record accurate.
Keep key identifiers — your URN or UTR — stored safely and accessible. Update changes within 90 days of any event, and where tax obligations apply, meet the 31 January annual declaration and filing deadline without fail.
If you cannot receive access codes because your contact details have changed, a quick telephone call to the TRS helpline (0300 123 1072) can often unblock access within minutes.
When matters are unclear — tax treatment of trust income, timing of distributions, potential exit charges or closure dates — get professional advice early. England invented trust law over 800 years ago, and the rules are well established but detailed. Our team at MP Estate Planning offers plain-language guidance to turn those rules into simple, actionable steps for your family.
For help finding paperwork or a registration reference, see our guide to finding a trust fund in the UK. Stay organised, keep good records, and trust administration stays smooth.