Last reviewed: July 2026 | Written by Godwin Pinto at AccTek Ltd
Going self-employed is one of the most significant financial steps
you can take. The process of registering as a sole trader with HMRC is,
in itself, straightforward — it takes around 10–15 minutes online. What
catches most people out is the deadline they were never told about, and
the cascade of obligations that follow registration. This guide covers
every step, the current 2026–27 figures, and what to expect once your
Unique Taxpayer Reference lands on your doormat.
A sole trader is an individual who runs a business in their own name.
Legally, you and your business are a single entity — there is no
separate legal person as there is with a limited company. You are
entitled to keep all post-tax profits, but you are also personally
liable for any debts or legal claims the business incurs.
Sole trader status is the most common business structure in the UK.
It suits freelancers, consultants, tradespeople, and anyone testing a
business concept before committing to the administrative overhead of
incorporation. The sole trader route is low-cost to set up and run, but
it is not without obligations — and those obligations begin the moment
you start trading.
HMRC requires you to notify them of your self-employed status by
5 October following the end of your first tax year of
trading.
The UK tax year runs from 6 April to 5 April. If you began trading at
any point in the 2025–26 tax year (6 April 2025 to 5
April 2026), your registration deadline is 5 October
2026.
The trading allowance: If your total self-employed
income is £1,000 or under in a tax year, you may be covered by the trading
allowance and may not need to file a Self Assessment return. Income
above £1,000 means registration is required.
Late registration penalties: Missing the 5 October
deadline can result in a failure-to-notify penalty from HMRC. The
current penalty regime is set out at https://www.gov.uk/self-assessment-tax-returns/penalties
— the amount depends on how late the notification is and whether tax was
lost as a result. Always check the current HMRC guidance directly, as
penalty figures can be updated.
Your specific situation may vary — speak to a qualified
accountant if you are unsure whether or when you need to
register.
Before you begin the online registration, have the following to
hand:
Registration is completed through HMRC’s Government Gateway. The
process typically takes 10–15 minutes.
Go to https://www.gov.uk/log-in-file-self-assessment-tax-return.
Sign in with existing Government Gateway credentials, or select “Create
sign in details” to set up a new account. You will need your NI number
and a form of identity verification (a valid UK passport or driving
licence is accepted).
Once logged in, select “Register for Self
Assessment”. HMRC will ask the reason for your registration.
Select “I am self-employed or a sole trader”.
You will be asked to complete the CWF1 form (for
those not already in Self Assessment) or the SA1 form
(if you are already registered for another reason). Provide your
business start date, a description of your business activity, and your
personal details. The online CWF1 is at https://www.gov.uk/register-for-self-assessment/self-employed.
Class 2 National Insurance was abolished from April 2024. There is no
separate enrolment step for NI contributions. Your Class 4 NI
liability is calculated automatically as part of your annual
Self Assessment return, based on your taxable profits.
If you wish to make voluntary Class 2 contributions to protect your
State Pension entitlement, this can be arranged through your Self
Assessment return or by contacting HMRC. Current voluntary Class 2 rates
are at https://www.gov.uk/self-employed-national-insurance-rates.
After submitting your registration, HMRC will post a letter
containing your Unique Taxpayer Reference (UTR) to your
registered address. Allow up to 10 working days for
delivery. Keep this letter safe — your 10-digit UTR is required for
every interaction with HMRC, including instructing an accountant to act
on your behalf.
Your UTR letter will also include an activation code
for your online Self Assessment account. You must use this code within
28 days of issue. Once activated, you can view your tax position, file
returns, and make payments directly through your Government Gateway
account.
Registration is the starting gun, not the finish line. Here is what
follows:
Your first Self Assessment return: Your first tax
return will cover the tax year in which you began trading. The deadline
to file online and pay any tax owed is 31 January after
the end of that tax year. For example, if you started trading during
2025–26, your first online filing and payment deadline is 31
January 2027.
Payments on account: If your annual tax bill exceeds
£1,000 and less than 80% of your tax is collected at source
(e.g. through PAYE), HMRC requires payments on account
— two advance payments towards the following year’s liability, due on 31
January and 31 July. This surprises many first-year sole traders who
budget only for their current year’s bill. Full explanation at https://www.gov.uk/understand-self-assessment-bill/payments-on-account.
Recordkeeping from day one: HMRC requires you to
retain business records for at least five years after the 31 January
filing deadline for the relevant tax year. See the FAQ section below for
what to keep.
The following figures apply to the 2026–27 tax year
(6 April 2026 to 5 April 2027) for sole traders in England, Wales, and
Northern Ireland. Scottish income tax rates differ — see https://www.gov.scot/policies/income-tax/.
These figures are provided as information only. Your tax position
will depend on your total income, allowable expenses, reliefs, and
personal circumstances. Speak to a qualified accountant before making
financial decisions.
| Band | Taxable Income | Rate |
|---|---|---|
| Personal Allowance | Up to £12,570 | 0% |
| Basic Rate | £12,571 – £50,270 | 20% |
| Higher Rate | £50,271 – £125,140 | 40% |
| Additional Rate | Over £125,140 | 45% |
The Personal Allowance tapers by £1 for every £2 of income over
£100,000, reaching zero at £125,140.
Sole traders pay Class 4 NI on taxable profits
through their Self Assessment return:
Class 2 NI has been abolished (from April 2024). Voluntary Class 2
contributions remain available to protect State Pension credits if your
profits fall below the Small Profits Threshold.
If your taxable turnover exceeds £90,000 in any
rolling 12-month period, you must register for VAT with HMRC.
Registration is at https://www.gov.uk/register-for-vat.
Voluntary registration below the threshold is also permitted and can be
advantageous if your clients are VAT-registered businesses.
From April 2026, sole traders and landlords with
qualifying income above £50,000 are required to submit
quarterly digital updates to HMRC using MTD-compatible software,
alongside an end-of-period statement and final declaration. This
replaces the single annual Self Assessment return for those in
scope.
Sole traders with qualifying income between £30,000 and
£50,000 are expected to enter MTD ITSA from April
2027. HMRC’s current guidance is at https://www.gov.uk/guidance/use-making-tax-digital-for-income-tax.
The decision between remaining a sole trader and incorporating as a
limited company comes down to several factors: your current and
projected income, your attitude to personal liability, your plans for
taking on staff or external investment, and the administrative overhead
you are willing to manage.
Sole trader status is simpler and cheaper to run; a limited company
can be more tax-efficient at higher profit levels and provides personal
liability protection, but requires annual accounts, Corporation Tax
filings, and Companies House compliance.
For a detailed breakdown with a 2026–27 tax comparison, see our
companion guide: sole trader vs limited company
(part of the AccTek Sole Trader Hub — coming soon).
The right business structure depends on your personal and
commercial circumstances. Speak to a qualified accountant before
deciding.
Getting your records right from the outset saves significant time at
tax return season and ensures you do not miss allowable expenses — a
common cause of sole traders paying more tax than they need to.
At a minimum, you should record all income (invoices, payment
receipts, bank deposits) and all business expenditure (receipts,
invoices, mileage logs) and retain these for at least five years. For a
full breakdown of what to keep and which accounting software suits sole
traders, see our sole trader bookkeeping guide
(coming soon).
Yes. If your self-employed income exceeds the £1,000 trading
allowance in a tax year, you are legally required to notify HMRC by 5
October following the end of that tax year. Notification is made by
registering for Self Assessment via Government Gateway using the CWF1
form.
The online registration itself takes around 10–15 minutes if your
details are to hand. Once submitted, HMRC posts your UTR to your
registered address within up to 10 working days. Allow two to three
weeks in total before your Self Assessment account is fully active.
Yes — this is common and entirely lawful. Your PAYE employment income
is taxed through your employer’s payroll as normal. You also need to
file a Self Assessment return to account for your self-employed income,
and to pay any Income Tax and Class 4 NI owed on your self-employed
profits above the Personal Allowance.
The registration deadline is 5 October following the end of
your first tax year of self-employment. The UK tax year ends on
5 April. If you began trading between 6 April 2025 and 5 April 2026,
your deadline is 5 October 2026.
A Unique Taxpayer Reference (UTR) is a 10-digit number issued by HMRC
when you register for Self Assessment. It identifies you in all dealings
with HMRC and is required to authorise an accountant to act on your
behalf (via a 64-8 authorisation form). Expect your UTR letter by post
within 10 working days of completing your registration.
HMRC requires you to keep records of all business income (invoices,
receipts, bank statements) and all allowable business expenses for
at least five years after the 31 January filing
deadline for the relevant tax year. If you are subject to MTD
ITSA, records must be kept digitally in compatible software. Full HMRC
guidance is at https://www.gov.uk/self-employed-records.
Registering as a sole trader is something you can do yourself in
under 15 minutes. Making sure your records, allowable expenses, Self
Assessment filings, and MTD obligations are set up correctly — and that
you never miss a deadline — is where specialist support pays for
itself.
AccTek’s sole trader accountancy service (link:
acctek.co.uk sole trader service page) is built for exactly this:
fixed monthly pricing, ICAEW-qualified accountants, and no surprises at
tax time.
Speak to a sole trader accountant at AccTek →
This article provides general information about HMRC registration
procedures and UK tax obligations for the 2026–27 tax year. It does not
constitute tax or financial advice. AccTek Ltd is regulated by the
ICAEW. Your personal circumstances will affect your obligations — please
consult a qualified accountant.
Godwin Pinto ACA is a chartered accountant and founder of AccTek with 20+ years of experience accounting and tax for contractors, startup and SME .
AccTek is a member firm of the Institute of Certified Practising Accountants (ICPA). Our accountants have a wide range of qualifications and accreditations from trusted professional bodies such as the AAT, ICPA, and ACCA.
