UK sole trader setup checklist: what to sort in your first 90 days

This is a working checklist for someone setting up as a self-employed sole trader in the UK. It walks through the steps in the order they actually need to happen: register with HMRC, get the right insurance, set up a separate business bank account, build the financial admin layer, and start trading professionally.

It is written for people running real trades and service businesses — plumbers, beauty salons, dog groomers, electricians, personal trainers, photographers, accountants, childminders — not for tech founders raising venture capital. The steps here are the ones you actually need to do, in the order you actually need to do them.

The checklist does not replace tax advice from a qualified accountant or legal counsel from a solicitor. For complex situations, get proper advice. For the routine setup steps that apply to almost every UK sole trader, the checklist below covers the ground.

A note on dates and figures: HMRC thresholds and rules change. Where this guide cites a specific number (income threshold, mileage rate, registration deadline), check the current HMRC published figure before relying on it. The structure of the steps stays correct even when the underlying numbers shift.

The first month is mostly about getting registered and protected. There are five steps that almost every UK sole trader needs to complete in this window.

Most people setting up alone start as a sole trader. It is the simplest structure, with the lowest admin burden, and you can move to a limited company later if it makes sense.

The alternative at this stage is usually a limited company, which gives you separation between you and the business but adds Companies House obligations, corporation tax, dividend rules, and director responsibilities. For most people in their first year of self-employment, sole trader is the right starting point.

Decide which one you are before you do anything else. Everything below assumes sole trader; if you are setting up as a limited company, the registration steps are different and you should use Companies House guidance rather than this checklist.

Action: Confirm you are setting up as a sole trader. If you are unsure between sole trader and limited company, a one-hour conversation with an accountant before you register is worth the £80 to £150 it will cost.

Every UK sole trader has to register with HMRC for Self Assessment. The deadline is 5 October following the end of your first tax year of trading. The UK tax year runs 6 April to 5 April. So if you started trading in May 2026, you have until 5 October 2027 to register.

Do it sooner rather than later. The registration is free, takes about ten minutes online, and gives you your Unique Taxpayer Reference (UTR) which you will need for everything tax-related from that point on.

Action: Go to gov.uk/register-for-self-assessment and complete the registration. Save your UTR somewhere you can find it (it will arrive by post within 10 working days). Set a calendar reminder for 31 January each year — that is the Self Assessment filing deadline.

You must register for VAT if your taxable turnover exceeds £90,000 in any rolling 12-month period (current threshold; verify against gov.uk before relying on it). You can voluntarily register below that, which is sometimes worth doing if you mostly sell to other VAT-registered businesses.

For most sole traders in their first year, VAT registration is not required. Track your turnover monthly so that if you are approaching the threshold, you have time to register before crossing it.

Action: Confirm whether you expect to exceed the VAT threshold in the next 12 months. If yes, register at gov.uk/register-for-vat. If no, set a quarterly check-in to monitor your rolling 12-month turnover.

Insurance requirements vary by trade. The common policies UK sole traders need are:

Public liability insurance. Covers you if you cause injury to a member of the public or damage their property in the course of your work. Almost every customer-facing business needs this. Typical cover is £1m or £2m. Cost: £60–£200 per year for most low-risk trades.

Professional indemnity insurance. Covers you if you give advice or do work that turns out to be wrong and causes the client a financial loss. Important for accountants, consultants, designers, coaches, therapists, anyone whose work involves judgement or advice.

Employer's liability insurance. Legally required if you employ anyone, even part-time or family members. Minimum cover is £5m by law.

Trade-specific cover. Many trades have additional requirements. Electricians need product liability and tools cover. Beauty therapists need treatment liability. Dog groomers need care, custody and control cover for pets. Personal trainers need professional liability appropriate to fitness work.

Action: Identify which policies your trade actually needs (check with a trade body if you are not sure). Get three quotes from UK trade insurers (Simply Business, Hiscox, AXA, and trade-specific specialists are common starting points). Pick a policy and pay it before you take your first paying customer.

This is the single piece of admin that pays back fastest in your first year. When all your business income lands in one account and all your business expenses leave one account, your records are 80 per cent organised by default. Your bank statement becomes a near-complete log of business activity.

Most UK banks offer business accounts free for the first 12-18 months. The major options to compare are: Starling, Tide, Monzo Business, Mettle (free, NatWest-backed), Revolut Business, plus the high-street banks (Barclays, Lloyds, NatWest, HSBC) which often have introductory free periods.

You do not legally need a separate business account as a sole trader, but it makes everything else on this checklist easier. Skip this step and you will spend hours every quarter trying to remember which transactions were business and which were personal.

Action: Compare three business account providers. Open the account. Move all business income to the new account from day one. Set up direct debits for any recurring business expenses (insurance, software, professional fees) to come out of the business account.

The second month is about the foundation that lets you trade professionally. This is the layer that most sole traders skip and then regret six months in.

By now you have your business bank account, your HMRC registration, and your insurance. The next step is the day-to-day record-keeping that turns money in and money out into structured data you can use.

You need:

• An invoice template. Sequential invoice numbers, your business name and contact details, line items, totals, payment terms, VAT line if VAT-registered.
• An expense tracker. Date, supplier, category, amount, receipt reference. Categories tailored to what your business actually spends money on.
• A receipt log. Every business receipt logged with reference to where the physical or digital copy is stored.
• A mileage log (if you drive for business). Date, journey purpose and business miles. For the 2026 to 2027 tax year, HMRC's simplified-expenses rate for cars and goods vehicles is 55p per mile for the first 10,000 business miles and 25p thereafter. Check the current GOV.UK vehicle-expenses guidance before using a rate, and do not combine the flat-rate method with vehicle costs that the rules exclude.
• A payment record. Track which clients have paid, which haven't, which are overdue.

These can be built in Excel or Google Sheets. They do not need to be elaborate, but they do need to be consistent. The single biggest mistake most sole traders make is using a different ad-hoc invoice template each time, which makes it impossible to look back over a year of records and see patterns.

Action: Set up an invoice workflow using a tool you have checked for fit. LaunchKit Financial Forms are available; each niche page states its verified distinct-form count and exact included-document list, and no separate Invoice Tracker is advertised. Set up your expense tracker with categories that match your trade. Decide where you will store receipts (a dedicated email folder works for most sole traders). Set up your mileage log if applicable. Block 15 minutes every Friday to log the week's invoices, expenses and receipts.

You need somewhere clients can find you, see what you do, and contact you. The minimum is:

• A Google Business Profile. Free, takes 20 minutes to set up, gets you onto Google Maps. Essential for any local-service business.
• A simple website or landing page. Even one page with your services, contact details and area covered. Low-cost options: Carrd (£15/year), Squarespace (£10–£20/month), Shopify (if you sell products), or a free Linktree-style profile if you are not ready for a full site yet.
• The same business name everywhere. Whatever name you trade under, use it the same way on your bank account, your invoices, your insurance, your Google profile, and any social media.

Action: Set up your Google Business Profile. Decide on your business name and use it consistently. Create a basic landing page or single-page website. Get a business email address (avoid gmail.com for client communication if possible).

Before you take your first paying customer, have the paperwork ready. The minimum varies by trade, but most sole traders need:

• A service agreement or terms and conditions document that covers what you provide, payment terms, cancellation policy, and liability limitations
• An intake form (especially for service businesses) that captures the client's details, what they need, and any relevant medical, allergy, pet behaviour, technical or compliance information
• A consent form if your work involves anything physical (treatments, dog grooming, working in someone's home)
• A privacy notice explaining how you handle client data under UK GDPR

These do not need to be drafted from scratch. Niche-specific templates exist that cover the standard ground for almost every UK trade. Get them in place before your first booking, not after.

Action: Identify which paperwork your trade actually needs. Put templates in place (LaunchKit Business Documents — see end of document — covers most UK trades). Save them somewhere you can quickly send to a new client.

Pricing is one of the hardest decisions for new sole traders, and most get it wrong by setting prices too low.

The basic calculation:

Planning hourly floor = (Target annual owner pay before personal tax + Annual overheads) ÷ Annual billable hours

Example for a self-employed plumber:

• Target owner pay: £40,000 before personal tax
• Annual overheads: £14,000 (van, fuel, tools, insurance, training, accountant, phone, software)
• Billable hours: 1,350 per year (about 26 hours per week, allowing for holidays, sickness, admin, quoting, travel)
• Planning hourly floor = (£40,000 + £14,000) ÷ 1,350 = £40 per hour

Most sole traders never do this calculation. They pick a number that "sounds about right" based on what competitors charge, and then wonder why they are working long hours without making the money they expected.

Run the calculation honestly for your own business. The result is a planning floor, not a guaranteed profitable price. Check materials charged separately, non-billable time, capacity, VAT where applicable, demand and the markup or contingency you choose before publishing a rate.

Action: Write down your target annual owner pay before personal tax. Add up annual overheads without double-counting materials you charge separately. Estimate realistic billable hours. Calculate a planning hourly floor, then review the other pricing factors before publishing a rate.

Self Assessment is not a surprise event. The deadline is 31 January every year for the previous tax year. Plan for it now and it becomes routine.

Two practical steps:

Set aside money for tax using a current estimate. The appropriate amount depends on profit, allowances, other income, Class 4 National Insurance and possible payments on account. For 2026 to 2027, Class 2 is generally treated as paid once profits reach HMRC's threshold and is voluntary below the small-profits threshold; it should not be added as a universal weekly charge. Use current HMRC guidance or an accountant to estimate your own amount, then transfer that amount regularly to a separate savings account.

Decide who will file your Self Assessment. Either you, using the filing route HMRC says applies to you, or an accountant. If you use an accountant, get one in place before your first tax year ends, not in mid-January. Fees vary, so get a current quote for your records and circumstances.

Action: Estimate tax from current HMRC rates and your expected profit, decide on a regular transfer amount, and revisit the estimate when profit changes. Decide whether you will file yourself or use an accountant. Add the applicable filing and payment deadlines to your calendar with an earlier review reminder.

The third month is about getting your operations to the point where the business runs on systems, not memory.

Making Tax Digital for Income Tax applies in stages to eligible sole traders and landlords, based on qualifying gross income from self-employment and property shown on the relevant tax return. The staged thresholds are over £50,000 from 6 April 2026, over £30,000 from 6 April 2027, and over £20,000 from 6 April 2028. Check GOV.UK to confirm whether HMRC says you must start and which date applies to you.

The practical requirements for someone HMRC says must use MTD include:

• Create and keep the required income and expense records digitally by the relevant deadline. Paper or unstructured notes are not enough on their own.
• Use compatible software to send four quarterly updates. Each update contains cumulative category totals from the start of the tax year to the end of that update period.
• Use compatible software to prepare and submit your Self Assessment tax return. The current HMRC journey does not use a separate product promise called a "final declaration".

If HMRC does not yet require you to use MTD, organised records can still make Self Assessment easier. Do not describe a spreadsheet as compliant, approved or MTD-ready unless the complete software and digital-link workflow has been checked against current HMRC requirements.

Action: Use GOV.UK's current MTD Income Tax guidance to check whether and when you must start. If you are in scope, choose compatible software and confirm how digital records, permitted digital links, cumulative updates and the tax return work together. If you are not in scope, still keep clear records without claiming the workflow is MTD-compliant.

Cash flow is what kills most small businesses, not lack of profit on paper. Build a simple monthly view that shows:

• Income expected in the next month
• Income expected in the next three months
• Expenses due in the next month
• Expenses due in the next three months
• Cash balance forecast at the end of each upcoming month

This does not need to be sophisticated. A two-tab spreadsheet does the job. The point is to see ahead — to know when a tight month is coming so you can plan, rather than be surprised.

Action: Set up a simple cash flow forecast spreadsheet. Update it once a week (15 minutes is enough). Flag any month where your forecast cash balance drops below one month of expenses.

Once you have customers, communication is what keeps them coming back. The rhythm that works for most sole traders:

• Booking confirmation sent within 24 hours of a booking
• Reminder 24 to 48 hours before the appointment or job
• Follow-up within 48 hours of completion (thank-you, request for a review, check on satisfaction)
• Periodic check-in for past clients you haven't seen in a few months

These can be automated through a simple booking tool, or done manually. The point is consistency. Clients judge you on the small interactions as much as the work itself.

Action: Decide your communication rhythm. Set up templates for the standard messages. Pick a tool (or a manual process) and stick with it.

By month three, you should be tracking enough to know whether the business is working. The minimum:

• Revenue per month
• Number of new clients per month
• Number of repeat clients per month
• Average value per client
• Profit margin per main service type (if you offer more than one)

These five numbers, updated monthly, tell you almost everything you need to know about whether the business is healthy. They take about 30 minutes a month to update if your invoices and expenses are already structured.

Action: Set up a simple monthly dashboard (one tab in your financial spreadsheet). Block 30 minutes on the last Friday of every month to update it. Look at the trend over time — three months of data starts to show patterns.

By the end of month three, you have the foundation in place. The next 90 days is about using the foundation to grow the business. Look at:

• Which marketing channels are bringing you clients? Lean into the ones that work.
• Which clients are most profitable? Get more like them.
• Which services have the best margins? Sell more of those.
• Where are the bottlenecks in your operations? Fix them before they cost you money.

The first 90 days were about setting up. The next 90 days are about iterating.

This checklist tells you what to do. LaunchKit's templates and calculators are niche-specific, UK-focused, one-time purchases.

The 8 product families in the published website catalogue on yourlaunchkit.co.uk:

• Business Documents — Essential is a smaller PDF starter pack with a fillable business-name header. Premium supplies the full document set as interactive fillable PDFs plus editable DOCX files, with a separate fill-online HTML bundle for adding business details, colours and completing the forms in a browser. Premium ships blank for you to personalise; Studio is the separate service that can prepare documents from a confirmed business profile. Electrician and solar-panel-installer packs are editable working records, not official certification, and do not replace EICR, MCS database, DNO or scheme documentation.
• Financial Forms — Customisable supplies the verified distinct set as browser-personalisable HTML. Premium supplies fillable PDFs plus editable DOCX files, with a separate fill-online HTML bundle for completing the forms in a browser. Premium ships blank for you to personalise; Studio is the separate service that can prepare forms from a confirmed business profile. Customisable contains a duplicate invoice file and Premium contains a second invoice template under the same legacy filename; neither is counted as a separate form type.
• Pricing Calculator — Pricing Calculator is a single Premium Excel workbook. It is a planning tool, not financial advice and not a guarantee of profit.
• Startup Guide — Startup Guide is a single print-ready PDF. It is for reading or printing; it is not editable, not fillable and not a compliance certificate.
• AI Copy Kit — AI Copy Kit is a single-tier communication toolkit: 4 core documents, each supplied as editable DOCX and read-only reference PDF — 8 files total. It supplies ready-made wording and prompts for use with your own AI tool if you choose; it is not an AI service, a generate button or a guarantee of leads.
• Social Media Content Kit — Social Media Content Kit is a single-tier 13-file product: Start Here PDF, 10 section PDFs, complete master PDF and one editable master DOCX. Record confirmed business details in the localisation worksheet as a reference, then manually personalise the captions you choose in the master DOCX. The static files do not automatically adapt every caption. It is a content planning kit, not a guarantee of reach, followers or engagement.
• Round Management Pack — The Round Management Pack is a single-tier product: a 5-sheet Excel workbook + two editable Word templates + a setup-guide PDF. It is a practical admin toolkit, not accounting software, a CRM app or a compliance product.
• Price List & Service Menu — Single-tier product: an interactive HTML price list (edit in your browser), an editable DOCX (edit in Microsoft Word) and a How-to-Use Guide PDF. A presentation tool for displaying prices — not a contract, invoice or accounting product.

Ready-made catalogue products are one-time purchases with no subscription, and their files are delivered after payment. LaunchKit Studio is a separate optional subscription for customers who want an ongoing workspace and credit-based tools.

The full live catalogue is at yourlaunchkit.co.uk/niches.

Five principles that make the difference between a sole-trader business that runs cleanly and one that doesn't:

Separate is better than mixed. Separate bank account. Separate email. Separate space (mental or physical) for the business. The cost of mixing is paid in admin hours every quarter.

Structured is better than tidy. A messy spreadsheet that is consistently structured beats a beautiful one that changes format every month. Build the structure once, then maintain it.

Boring is better than clever. Pricing calculations. Receipt logs. Regular tax savings. None of it is exciting, but a repeatable routine makes the records easier to review.

Annual is too late. The sole traders who treat tax season as a January project are the ones who lose a weekend every year. The ones who maintain records in 15 minutes a week barely notice it.

Niche-specific can reduce setup work. A generic template asks you to define every category. A verified niche-specific tool can provide a more relevant starting structure, but you still need to review it against your business and current rules.

Setting up properly takes time you don't think you have. The alternative is paying for the lack of setup later — in lost income from bad pricing, in extra accountant fees from messy records, in lost clients from missing paperwork, in lost weekends reconstructing what should have been routine.

Get the foundation in. The business runs better forever after.

If you have questions about which LaunchKit product fits your trade, get in touch through the contact page on the website. We answer the contact form ourselves — replies usually come back inside a working day.