Around 6 in 10 UK businesses started in 2019 had closed by their fifth birthday. That is the headline from the Office for National Statistics (ONS) survival data: of the 2019 cohort, only about 38% were still trading five years later. Closures in that data include owners who retire, merge or simply stop, so it is not a count of failures. It is still a sobering number for anyone about to start, and most of the avoidable trouble in year one is admin, not ambition.
We work with new and small UK businesses every week, and the pattern is familiar. The idea is fine. The surprise is a tax bill, a missed registration or a spreadsheet nobody can find. Here are seven things worth sorting before you start trading, with the AI-assisted shortcut for each where one genuinely helps.
1. Tell HMRC you exist, and know the deadline
If you are a sole trader, you register for Self Assessment with HMRC. It is free. The deadline is 5 October after the end of the tax year in which you started trading, so someone who starts in June 2026 has until 5 October 2027. Many people register on the day they start anyway, because your Unique Taxpayer Reference arrives by post and can take a couple of weeks. You can check the current rules on the GOV.UK Self Assessment registration page.
There is also a £1,000 trading allowance. If your gross trading income stays under it, you generally do not need to register. Over it, you do.
2. Open a separate bank account
A sole trader is not legally required to have a business account, but mixing personal and business spending is how receipts go missing and how a simple tax return becomes a two-day job. A separate account makes every pound in and out a business pound. It is the cheapest piece of bookkeeping you will ever do.
3. Work out what to set aside for tax
Nobody takes tax off your payments for you when you are self-employed. A simple habit helps: move a fixed percentage of every payment into a savings pot the day it lands. The right percentage depends on your profit, so ask an accountant or use HMRC's calculators, then stick to it.
The one that catches first-year traders out is payments on account. Your first Self Assessment bill can include the tax for the year just ended plus an advance payment towards the next one, so a single January can be much bigger than you expected. Knowing that in advance is worth more than any clever tool.
4. Know your VAT line before you cross it
You must register for VAT if your taxable turnover goes over £90,000 in a rolling 12 months. The current threshold is on GOV.UK. It is a turnover test, not a profit test, and it is measured on a rolling basis, so you can cross it mid-year. Put a reminder in your calendar to check your trailing 12 months of sales every month once you are past about £60,000.
5. Keep digital records from day one
Making Tax Digital for Income Tax starts for sole traders and landlords with qualifying income over £50,000 from April 2026, over £30,000 from April 2027 and over £20,000 from April 2028. If you plan to grow, you will be in it sooner than you think, and it expects digital records and quarterly updates. We covered the detail in our guide to Making Tax Digital, and the short version is: start with software or a clean spreadsheet habit now, and you will not be rebuilding your books later.
6. Check what customers and clients will ask for
Some customers want proof of public liability insurance before they will give you a job. Others want a written quote, terms or a contract. None of this is hard, but it is awkward to discover on the day you win your first order. Ask two or three of your likely customers what they need to see, and write the answers down.
7. Hand the dull admin to AI, and keep the judgement
This is where we can help most, and where the benefit is easiest to picture. Quotes, follow-ups, invoice reminders and replies to common questions are repetitive and well suited to a tool like Claude or ChatGPT. As an illustration, not a promise: if you shaved 2 hours a week off admin, that is about 96 hours over a 48-week working year. That is our own arithmetic, not a measured result, and your numbers will differ.
A starter prompt you can paste into Claude or ChatGPT today:
"I run a small UK business that [what you do]. Write a friendly quote email template I can reuse. Include placeholders for the customer name, job description, price, what is included, what is not included, how long the quote is valid for, and payment terms. Keep it under 150 words."
Read what comes back, change anything that is not right, and save the version you like. Do not paste in customer details you would not be comfortable sharing, and check any tax or legal statement against GOV.UK before you rely on it.
The five-minute version
If you do nothing else this week: write down your start date, open a business bank account, set a tax savings percentage, note the £90,000 VAT line and the 5 October registration deadline, and put one reusable quote template in place. That is most of what separates a calm first year from a stressful one.
This is general information, not tax or legal advice. Dates and thresholds change, so check GOV.UK or ask an accountant for your own situation. The survival figure is from ONS data as analysed by third parties and we could not open the ONS tables directly while writing, so please check the ONS five-year survival indicator for the latest numbers.
