HMRC guide

First-year sole trader compliance plan

The first year as a sole trader is about keeping records from day one, knowing when to register for Self Assessment, planning the first tax return and checking whether VAT, MTD or employer duties become relevant.

Last reviewed: 23 August 2026
Sources checked: 23 August 2026
Reading time: 6 minutes

Written by Business Sorted editorial team

Business Sorted provides general educational information and organisation tools. It is not Companies House, HMRC, a solicitor, an accountant, a tax adviser or a regulated professional adviser. Check official sources and get professional advice where your circumstances need it.

Direct answer

In your first year as a sole trader, keep records from the start of trading, register for Self Assessment if you earn more than GBP 1,000 in a tax year, plan for the 5 October registration deadline where required, and keep 31 January visible for online filing and payment after the tax year ends. Add VAT, MTD and payroll checks only if they apply.

Key facts

A sole trader must keep records from the start of trading.
Self Assessment registration is required if sole-trader earnings are more than GBP 1,000 in a tax year.
VAT, MTD and payroll duties are conditional and should be reviewed rather than assumed.

Month-one setup

Start with records, not paperwork panic. GOV.UK says sole traders must keep records when they start trading because those records help work out profit or loss for the Self Assessment tax return.

Choose a simple structure for invoices, receipts, bank evidence and mileage or home-working notes if relevant. The structure can be simple, but it should be consistent enough that January is not a reconstruction exercise.

Registration and tax-year planning

You can start trading before registering, but GOV.UK says you must register for Self Assessment as a sole trader if you earn more than GBP 1,000 in a tax year. The tax year runs from 6 April to 5 April.

For the 2025 to 2026 tax year, HMRC says people who need to tell HMRC about a return should do so by 5 October 2026, with online filing and payment due by 31 January 2027. Future years should be checked against the current GOV.UK deadline page.

Conditional checks in the first year

VAT is not automatic for every sole trader. Add a monthly rolling turnover check if sales are growing, because compulsory VAT registration depends on taxable turnover going over the official threshold or being expected to do so soon.

MTD for Income Tax is also conditional. Sole traders in Self Assessment should review qualifying income against the MTD thresholds and prepare digital records before the start date if they are in scope.

First-year next steps

Use Business Sorted's decision tools to keep the structure question separate from the deadline question, then create reminders for registration, record reviews and tax return preparation. Recommended business essentials can help with practical admin choices, but they do not replace official guidance.

If your business takes on staff, imports goods, sells internationally or has regulated activity, add specialist checks early. This plan covers common first-year admin, not every industry rule.

Frequently asked questions

Can I start as a sole trader before registering?

GOV.UK says you can start trading before registering, but you must register for Self Assessment if you earn more than GBP 1,000 in a tax year.

Do I need accounting software in my first month?

Not always, but you need a reliable record system from the start. If MTD for Income Tax or VAT applies, compatible software may become necessary.

Useful next steps

Keep the admin tools connected to the obligation

Business Sorted keeps practical business-admin choices connected to source-linked dates, thresholds and reminders, without replacing HMRC or professional advice.

Relevant feature: First-year setup checklist and source-linked reminders.

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