HMRC Form SA1: Registering for Self Assessment and Getting a Tax Return
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JustFill is not affiliated with HM Revenue & Customs (HMRC). This is an independent third-party tool to help you complete HMRC Form SA1. Always download the current blank form from the official source and verify your completed copy before signing or submitting. Official HMRC Form SA1 from HM Revenue & Customs (HMRC)
HMRC Form SA1, Registering for Self Assessment and getting a tax return, is the official HM Revenue & Customs registration form used by individuals who need a 10-digit Unique Taxpayer Reference (UTR) and a Self Assessment tax return for reasons OTHER than self-employment — such as UK property rental income, company director status, High Income Child Benefit Charge (HICBC), untaxed foreign or dividend/savings income, capital gains, or trust income. Open the Form SA1 blank in JustFill to complete it in your browser and download a clean PDF.
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Need to register for UK Self Assessment and obtain a Unique Taxpayer Reference (UTR) when you are not a self-employed sole trader, or when HMRC’s online Government Gateway identity verification fails (for example for expats, non-UK residents, new arrivals to the UK, or clients of accountancy firms)? HMRC Form SA1 is the official registration form for landlords, company directors, higher/additional-rate taxpayers claiming pension relief, and individuals with foreign or investment income. JustFill lets UK taxpayers and accountancy practices complete Form SA1 online in any browser, sign it cleanly, and download a print-ready PDF for posting to HMRC.
The official HMRC Form SA1 is published on GOV.UK at gov.uk/government/publications/self-assessment-register-for-self-assessment-and-get-a-tax-return-sa1. Click "Fill the blank HMRC Form SA1 now" above to open our fillable Form SA1 directly in JustFill, type your details and registration reason in your browser, and download a clean PDF.
What each section of HMRC Form SA1 asks for. JustFill’s AI will detect these fields automatically when you upload the PDF — review the breakdown below so you know what to enter.
Title, surname, first name(s), any previous surname, date of birth, UK National Insurance number (NINO), current residential address and postcode (and date moved in if within the last 3 years), daytime phone number, and whether you came to live in the UK in the last 12 months.
Tick all applicable reasons and enter the exact start date (DD/MM/YYYY): Company director, Getting income from land and property in the UK, Getting taxable foreign income, Yearly income over £100,000/£150,000, High Income Child Benefit Charge, Getting untaxed income that cannot be collected through your PAYE tax code, Getting income from a trust or settlement, or Capital Gains Tax.
Signed and dated by the taxpayer declaring that the information on Form SA1 is correct and complete to the best of their knowledge.
A fictional UK employee in Edinburgh who began letting out a residential flat in June 2026 completes HMRC Form SA1 to register for Self Assessment and obtain a 10-digit UTR for the 2026–2027 tax year.
Name: Mr Alistair J. Sample · DOB: 09/07/1986 · NINO: QQ 33 44 55 A · Address: 24 Morningside Road, Edinburgh, EH10 4BZ · Phone: 0131 496 0182
Fictional NINO and Ofsted/Ofcom test phone range.
☑ I am getting income from land and property in the UK · Date started: 01/06/2026
Triggers HMRC to issue a 10-digit Unique Taxpayer Reference (UTR) and notice to file for the 2026–2027 tax year.
Signed: Alistair J. Sample · Date: 23/10/2026
These values are made up. They are here to show what belongs on each line, not to be copied — every name, number, and address on your own HMRC Form SA1 has to be your own. Register by 5 October after the end of the tax year (5 April) in which your taxable income or gains arose to avoid Failure to Notify penalties.
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We load the blank HMRC Form SA1 PDF for you — no download needed. Or upload your own copy below.
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PDF, Word (.docx), JPG, PNG, WebP, HEIC, GIF and BMP. Instant field preview in browser — no credit card required.
First hand-filled PDF (up to 15 pages) is free with no watermark. Need more or AI Auto-Fill? Grab the $7 7-Day Pass (25 clean PDF downloads + 25 AI credits, $7 credited toward $19/mo Starter).
By uploading, you confirm you have the legal right to use this document.
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Official source: HMRC Form SA1 on HM Revenue & Customs (HMRC)’s website
Edition checked: HMRC Form SA1 (Registering for Self Assessment and getting a tax return, 2 pages). Verified against the official source on · Verified in our Government Forms Fillability Study.
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