⏰ 5 October 2026 Deadline • 14 Days Remaining

Do You Need to Register for Self Assessment by 5 October?

If you had untaxed income between 6 April 2025 and 5 April 2026, 5 October is the legal deadline to notify HMRC and get your 10-digit UTR number. Use our verified 60-second checker below to find out.

Interactive Registration Checker (2025/26)
Answer all 5 questions
1. Self-Employment / Side Hustles > £1,000 gross
Did your total gross income (turnover before expenses) from freelancing, consulting, Etsy, Deliveroo, or online selling exceed £1,000?
2. Property / Airbnb Rental > £1,000 gross or > £2,500 profit
Did you receive gross rental income over £1,000, or net rental profit between £2,500 and £9,999 from renting a room, flat, or Airbnb annexe?
3. Capital Gains (Crypto, Shares, Property) > £3,000 profit
Did your total net profits exceed £3,000 from selling shares (outside an ISA), cryptocurrency, or a second residential/commercial property?
4. High Income Child Benefit (HICBC) > £60,000 income
Did your adjusted net income exceed £60,000 while you or your partner received UK Child Benefit payments?
5. Dividends & Other Untaxed Income > £500 dividends
Did you receive more than £500 in company dividends (outside an ISA) or over £1,000 in untaxed foreign income or bank savings interest?
6. PAYE Salary Myth Check 2024/25 Rule Change
Is your income solely from a taxed PAYE salary, with no other income? (Even if earning over £100k or £150k).
Diagnostic Result
Your Registration Status

Why the 5 October Deadline is Critical

Under Section 7 of the Taxes Management Act 1970 (Notice of liability to tax), any individual who has taxable income for which tax has not been deducted at source must give notice to HM Revenue & Customs by 5 October following the end of the tax year.

For the 2025/26 tax year (which ran from 6 April 2025 to 5 April 2026), that notification deadline is 5 October 2026.

The UTR Bottleneck: When you notify HMRC, they assign you a 10-digit Unique Taxpayer Reference (UTR). HMRC delivers this reference via postal letter, which takes 10 to 15 working days. If you wait until January to register, your UTR will not arrive before the 31 January online filing deadline — triggering an automatic, non-negotiable £100 late-filing penalty even if you owe £0 tax.

2025/26 Self Assessment Thresholds at a Glance

Income Stream 2025/26 Exemption Threshold Must You Register by 5 Oct?
Sole Trader / Freelance £1,000 gross trading turnover (ITTOIA 2005 s.783A) Yes, if gross turnover exceeds £1,000 (even at a net loss).
Property / Airbnb Let £1,000 property allowance (ITTOIA 2005 s.783B) Yes, if gross rent > £1,000 or net profit is £2,500–£9,999.
Capital Gains (Shares/Crypto) £3,000 net annual exempt amount Yes, if net gains exceed £3,000.
High Income Child Benefit £60,000 adjusted net income Yes, if income > £60,000 and Child Benefit was claimed.
Dividends £500 dividend allowance Yes, if dividend income outside ISAs exceeds £500.
PAYE Salary > £100k / £150k Threshold removed by HMRC in 2024/25 NO, if taxed purely through PAYE with no other untaxed income.

The Big Myth: Do High PAYE Earners (> £100k) Need to Register?

For years, HMRC required anyone earning over £100,000 (and later £150,000) through their employer’s PAYE system to file a Self Assessment return purely because of their salary.

HMRC Rule Change: Starting from the 2024/25 tax year onwards, HMRC has officially eliminated the salary threshold filing requirement. If your income is taxed solely under PAYE and you have no side income, untaxed dividends, or property profit, you do not need to register for Self Assessment. HMRC automatically adjusts your tax code (such as applying the OT tax code) to handle the personal allowance taper above £100,000.

The UTR Timeline: From 5 October to 31 January

Here is what the schedule looks like if you register on time versus leaving it to the last minute:

Step 1: By 5 October 2026 — Register Online
Go to GOV.UK and complete the registration form using your National Insurance number and Government Gateway ID.
Step 2: Mid-October — Receive Your 10-digit UTR
HMRC posts your activation code and UTR number to your home address (takes 10–15 working days).
Step 3: November/December — Gather Records with TaxPilot
Upload your P60 and rental/freelance receipts directly into the TaxPilot Records Hub. TaxPilot automatically structures your figures into HMRC schedule boxes.
Step 4: By 31 January 2027 — Submit Return Online
Log into HMRC's portal. Open the TaxPilot sidebar and auto-fill your fields in minutes, avoiding manual typing and £100 late penalties.

How to Register on GOV.UK Today

  1. Go to the official HMRC registration page at gov.uk/register-for-self-assessment.
  2. Sign in using your Government Gateway user ID (or create one in 2 minutes if you don't have one).
  3. Provide your National Insurance number, date of birth, and home address.
  4. Specify your business/income start date (must be between 6 April 2025 and 5 April 2026 for the 2025/26 tax year).
  5. Submit and save your confirmation reference. HMRC will send your UTR by post.

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