Start out in business.

One of the first decisions is whether to trade as a sole trader or set up a limited company. This affects tax, paperwork, legal risk, how you pay yourself and how the outside world sees your business.

A sole trader route is usually simpler and cheaper to run. It can work well when you are testing an idea, starting small, keeping admin light or operating alone. Record-keeping is simpler, and you can draw money from the business without the extra company-law paperwork that applies to limited companies. Though this is becoming more complex with the introduction of Making Tax Digital requiring 5 returns to be made every year.

A limited company can be attractive where tax planning opportunities are stronger, where you want to reinvest profits, where you want clearer separation between personal and business finances, or where professionalism, investment or liability protection matter more.

There is no universal answer. The right structure depends on profit levels, risk, whether you already have other income, whether clients insist on dealing with a company, whether you plan to take on shareholders, and how much admin you are willing to handle. The biggest mistake is choosing a structure based on something you heard second-hand rather than looking at your actual situation. This is something we can assist with before you start.

Your trading name and your legal company name do not always have to be the same. If you are forming a limited company, you need a company name that is available, but your branding can still be handled separately.

If you form a limited company, you also need to think about your registered office. The registered office is on the public record. Many business owners do not want to use their home address for this, we recommend using an accountant or a professional registered office service.

For first accounts at Companies House, the rules for a private company’s first filing are different from later years. First accounts are generally due within 21 months of incorporation, or 3 months from the accounting reference date if that is longer. After that, private companies usually file accounts within 9 months of the accounting reference date.

This is one of the most common places where new businesses go wrong.

If you are self-employed and need to complete personal tax returns, you normally need to tell HMRC by registering for Self Assessment. HMRC says you must tell them by 5 October following the end of the relevant tax year if you need to send a return and have not sent one before, or you previously registered but did not need to file for the previous year.

If you run a limited company, HMRC and Companies House deadlines are separate. A company tax return is generally due 12 months after the end of the accounting period, while Corporation Tax is usually due earlier, 9 months and 1 day after the end of the accounting period.

If you take on staff, you may also need to register for PAYE. If you work in construction or use subcontractors, CIS may also apply.

This sounds basic, but it makes a huge difference.

If you run a limited company, a separate business account in the company name is effectively essential because the company is a separate legal entity. Even as a sole trader, keeping a separate account makes bookkeeping cleaner, helps identify business costs properly and reduces the risk of confusion later.

The current UK VAT registration threshold is more than £90,000 of taxable turnover, and the deregistration threshold is £88,000. Businesses can also register voluntarily below that level.

If you do register for VAT, you will normally need to keep digital VAT records and submit through Making Tax Digital-compatible software.

VAT is one of the areas where the wrong move early can cost money. Voluntary VAT registration is not automatically good or bad. It depends on your customers, pricing and sector. If you sell mostly to the public, early VAT registration can make your prices look less competitive. If your customers are VAT-registered businesses, voluntary registration can sometimes be more neutral or beneficial.

Cash flow matters more than most people realise in the first year. Invoices, payment terms, direct debit tools, card payment and making sure invoices are clearly numbered. Make it very easy for your documents to be understood and make it easy for your customers to pay you, then they have no excuses!

At the very least, your invoices should be easy to understand, numbered properly, issued promptly and followed up consistently. If you are a limited company, invoices should show the legal company name, registered office address and company number.

Do not underestimate how much stress you avoid by sorting this out properly. Plenty of businesses do decent work but still struggle because they invoice late, chase badly or make it hard for customers to pay.

Good records save time, reduce errors and make tax work cheaper and easier. Poor records do the opposite.

For sole traders, records can be relatively simple: income, expenses and supporting paperwork, kept digitally or in bookkeeping software. For limited companies, record-keeping needs to be more precise because you need a proper picture of assets, liabilities, director balances, what customers owe and what suppliers are owed.

HMRC says self-employed people must keep business records, and those records usually need to be kept for at least 5 years after the 31 January submission deadline for the relevant tax year. Limited companies must generally keep company records for 6 years from the end of the last financial year they relate to, sometimes longer in specific situations.

A cloud bookkeeping system does not just help with compliance. It gives you clearer numbers, faster records, cleaner bank reconciliation and less year-end panic. We recommend Xero or QuickBooks, for this partnered with Dext or Apron for receipt capture, we can supply what you need once we decide which works best for you and your business.

This matters even more now because Making Tax Digital for Income Tax starts from 6 April 2026 for sole traders and landlords with qualifying income over £50,000 from the 2024 to 2025 tax year. It then extends to those over £30,000 from 6 April 2027, and the government has also set out plans to bring in a £20,000 threshold from 6 April 2028.

So even if a business is not caught immediately, digital record-keeping is now the direction of travel and it makes sense to prepare early.

Typical allowable categories may include things like insurance, stationery, software, accountancy fees, advertising, materials, postage, business travel and certain home-working costs, but the detail matters. Something sounding “business related” does not automatically make it tax deductible. That is why this is one of the most common areas where owners either overclaim or underclaim.

For self-employed people using simplified expenses, HMRC’s current home-working flat rates are £10 per month for 25 to 50 hours of business use at home, £18 for 51 to 100 hours, and £26 for 101 hours or more. For simplified vehicle expenses, the current rate for cars and vans is 45p per mile for the first 10,000 business miles and 25p after that.

This is a major area of confusion for new owners. Sole traders can generally draw money from the business, but they need to remember that withdrawals are not the same as tax calculations, and they should usually keep money aside for tax.

For limited company owners, paying yourself is more structured. Salary and dividends are different things, with different tax and legal consequences. If money is taken out without the proper treatment, it can end up sitting on a director’s loan account and create problems. This is an area where good advice can save serious money and avoid expensive mistakes.

Websites, domain email addresses and building trust. That still matters. A simple website, professional email address and consistent presence can make a small business feel established much faster.

This is not about vanity. It is about credibility. When someone searches for you, they want to see that you are real, contactable and organised.

Business owners want calm, clarity and the feeling that someone capable is helping them stay on top of things. That is exactly what most start-up owners need.

A good accountant or adviser should not just file forms after the event. They should help you choose the right structure, register correctly, keep records clean, claim the right expenses, understand your numbers and avoid problems before they happen. While some sole traders can do parts of this themselves, limited companies are much harder to run properly without professional support.