How to Complete a UK Trust Tax Return (SA900) 2026/27: Step-by-Step Guide for Trustees
Acting as a trustee can be rewarding, but completing the Trust Tax Return (SA900) each year often feels overwhelming — especially with complex rules around beneficiary income, capital gains, and Inheritance Tax charges.
In this practical guide for the 2026/27 tax year, we walk you through the key steps, common pitfalls, and what you need to report so you can file confidently and avoid penalties.
When Does a Trust Need to File a Tax Return?
Most UK trusts must submit an SA900 tax return if any of the following apply in the 2026/27 tax year:
- The trust has received income (interest, dividends, rental income, etc.)
- The trust has made chargeable gains
- The trust is liable to pay Income Tax or Capital Gains Tax
- Trustees have received income on behalf of beneficiaries who are not liable to tax themselves
Even if the trust has no tax to pay, you may still need to file to claim tax credits or report distributions to beneficiaries.
Filing deadline:
- Paper return: 31 October 2027
- Online return: 31 January 2028
Late filing penalties start at £100 and can rise significantly. It is your responsibility as Trustee to ensure the tax affairs of the trust are up to date.
Key Sections of the SA900 Trust Tax Return
Here’s what trustees typically need to complete:
- Trust Details
- Trust name, date it was created, type of trust (discretionary, interest in possession, bare trust, etc.)
- Trustee details and contact information
- Income
- UK interest and dividends
- Foreign income
- Rental income from trust property
- Other income (e.g. royalties, trading income)
- Expenses and Allowances
- Trust management expenses
- Allowable deductions (often restricted for certain types of income)
- Capital Gains
- Disposal of assets (shares, property, etc.)
- Use of the trust’s annual exempt amount (£6,150 for 2026/27 – subject to confirmation)
- Distributions to Beneficiaries
- Income distributed or deemed distributed
- Tax credits attached to distributions (especially important for discretionary trusts)
- Inheritance Tax Charges
- Relevant property trusts (discretionary trusts) may need to report 10-year anniversary charges or exit charges
Important 2026/27 Considerations
- Trust Tax Rates
- Dividend trust rate: 39.35%
- Other income: up to 45%
- Capital Gains Tax: 18% or 28% depending on the asset and trust type
- Beneficiary Reporting Trustees must provide each beneficiary with a Tax Certificate (R185) showing their share of income and tax paid.
Beneficiaries then report this on their personal Self Assessment. - Non-Resident Trustees or Beneficiaries Special rules apply if any trustees or beneficiaries live outside the UK.
Real-Life Examples
Example 1: Discretionary Family Trust A discretionary trust receives £18,000 in dividends and £12,000 in bank interest during 2026/27. The trustees distribute £20,000 to beneficiaries. They must complete the full SA900, calculate tax at trust rates, and issue R185 forms so beneficiaries can claim any overpaid tax.
Common Mistakes Trustees Make
- Not knowing the Trust is in-scope of filing a return.
- Not registering the trust with HMRC – or registering the trust incorrectly.
- Missing the deadline for issuing R185 certificates to beneficiaries.
- Failing to consider Inheritance Tax periodic charges on relevant property trusts.
How ESDG Accountancy Can Help
Trust taxation is one of the most technical areas of UK tax. Getting it wrong can lead to penalties, interest, and unhappy beneficiaries.
At ESDG Accountancy we regularly help trustees of family trusts, discretionary trusts, and bare trusts with:
- Preparing and filing the SA900 Trust Tax Return
- Registering and De-registering a trust with HMRC.
- Calculating correct tax liabilities and distributions
- Issuing accurate R185 tax certificates
- Planning to minimise Income Tax, Capital Gains Tax, and Inheritance Tax charges
- Dealing with HMRC enquiries
Whether your trust is simple or complex, we offer fixed-fee pricing so you know the cost upfront.
Book a free 15-minute initial consultation today. We’ll review your trust’s situation and give you clear advice on your 2026/27 obligations.
Contact our friendly team in Blackheath and Greenwich — we take the stress out of trust tax returns so you can focus on what matters.
