Starting a business is exciting, but registering a company before you understand your responsibilities can create avoidable problems later. Many people rush to set up a limited company because it feels more professional, but the right structure depends on how you plan to trade, how much risk you are taking, how you expect to be paid and what your long-term goals look like.
The UK has a large and highly competitive small business market. At the start of 2025, there were around 5.7 million private sector businesses in the UK, and SMEs made up 99.85% of the business population. Around 75% of businesses did not employ anyone apart from the owners, which shows how many start-ups begin as very small or owner-managed ventures.
Before you register, it is worth getting proper advice on business structure, tax, bookkeeping and compliance. Good accounting for start ups can help you avoid mistakes from the beginning, rather than trying to fix them once your company is already trading.
Decide whether a limited company is the right structure
Registering a company is not the only way to start a business. You may be able to trade as a sole trader, partnership, limited liability partnership or limited company. Each structure has different legal, tax and administrative responsibilities.
A sole trader structure can be simpler to manage, especially when you are testing an idea or earning modest income. However, you and the business are legally the same, which means you are personally responsible for business debts.
A limited company is a separate legal entity. This can offer limited liability protection, but it also brings more formal responsibilities. You will need to file company accounts, submit Corporation Tax returns, maintain company records, and keep Companies House information up to date.
Before registering, think about:
- How much income you expect to generate
- Whether you will take on financial risk
- Whether you need investors or business finance
- Whether clients expect you to trade through a limited company
- How you want to pay yourself
- Whether you are likely to employ staff
Choosing the wrong structure can create unnecessary tax, admin and legal complications.
Understand the cost of registration
Registering a company is usually affordable, but it is still a formal legal step. Companies House fees changed from 1 February 2026. Online company incorporation now costs £100, while paper incorporation costs £124. Same-day digital incorporation through software costs £156.
The registration fee is only the start. You should also budget for professional advice, bookkeeping software, insurance, banking, website costs, marketing, tax, payroll support and any sector-specific licences or registrations.
Many start-ups underestimate early running costs. Even if you work from home and keep overheads low, you still need enough cash to cover set-up expenses and tax liabilities. A basic cash flow forecast can help you see what money is coming in, what needs to go out, and when pressure points may appear.
Choose the right company name
Your company name is part of your brand, but it also needs to meet Companies House rules. You cannot choose a name that is the same as an existing company, too similar to another registered name, offensive, misleading or using restricted words without permission.
Before registering, check:
- Whether the company name is available at Companies House
- Whether the matching domain name is available
- Whether the name works on social media platforms
- Whether the name could restrict future growth
- Whether it creates confusion with another business
It is also worth thinking long term. A name that suits your first service may feel too narrow if you later expand into new products, locations or sectors.
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Know your duties as a director
If you register a limited company and become a director, you take on legal responsibilities. You must act in the company’s best interests, keep proper records, file accounts and confirmation statements, and ensure taxes are handled correctly.
You cannot treat company money as your personal money. The company’s income belongs to the company. How you take money out usually depends on salary, dividends, expenses or director’s loan arrangements.
This is where many new company owners get into difficulty. If you mix personal and company finances, ignore paperwork or withdraw money without understanding the tax impact, you can create problems with HMRC, Companies House or your accountant later.
Open a separate business bank account
A limited company should have its own business bank account because it is legally separate from you. This makes it easier to track income, expenses, tax, salary, dividends and director’s loan transactions.
Even if you start as a sole trader, a separate business account is still a good idea. It keeps your records cleaner and makes bookkeeping much easier.
When choosing a bank account, look at:
- Monthly fees
- Transaction charges
- Integration with accounting software
- Payment processing options
- Access to savings pots for tax
- Customer service and online banking features
Keeping your business finances separate from day 1 gives you clearer records and reduces stress when tax deadlines arrive.
Plan for tax before you start trading
Tax should not be something you only think about at year end. When you start a company, you need to understand which taxes may apply and when they are due.
A limited company may need to pay Corporation Tax on profits. For the 2026 financial year, the small profits rate is 19% for companies with profits under £50,000, while the main rate is 25% for companies with profits over £250,000. Companies with profits between these levels may be eligible for marginal relief.
Depending on your situation, you may also need to think about:
- PAYE and National Insurance if you pay yourself or staff a salary
- Dividend tax if you take dividends
- VAT if your turnover reaches the threshold
- Self Assessment if you are a director or have other personal income
- Construction Industry Scheme obligations if you work in construction
Setting money aside for tax from the start helps you avoid cash flow problems later.
Understand VAT before you reach the threshold
Many start-ups do not think about VAT until they are close to the threshold, but you should understand the rules early. The VAT registration threshold increased from £85,000 to £90,000 from 1 April 2024. This applies to taxable turnover over a rolling 12-month period, not just your financial year.
If your business grows quickly, you may need to register sooner than expected. You may also choose to register voluntarily, especially if your customers are VAT-registered businesses and you want to reclaim VAT on costs.
However, VAT can affect your pricing, cash flow and admin workload. Before registering voluntarily, you should consider whether your customers can recover VAT and whether your prices will remain competitive.
Set up bookkeeping properly from the beginning
Good bookkeeping is one of the most important habits for any start-up. If you leave records until the end of the year, you risk missing expenses, losing receipts and making poor decisions because you do not know your numbers.
You should have a system for:
- Recording sales invoices
- Tracking supplier bills
- Uploading receipts
- Reconciling bank transactions
- Monitoring unpaid invoices
- Setting aside money for tax
- Keeping records for HMRC
Cloud accounting software can help you stay organised, especially when linked to your bank account. It can also make it easier for your accountant to review your records and spot issues before they become bigger problems.
Think carefully about how you will pay yourself
If you run a limited company, paying yourself is not as simple as taking money from the business whenever you want. Directors often use a combination of salary and dividends, but this depends on profit, tax rates, available reserves and personal circumstances.
Dividends can only be paid from company profits after tax. If you take dividends when the company does not have enough profit, they may be treated incorrectly and cause tax or accounting issues.
You should also be careful with director’s loan accounts. If you take money from the company that is not salary, dividends or reimbursed expenses, it may be recorded as a director’s loan. If not managed correctly, this can create additional tax charges.
Check whether you need insurance or registrations
Before trading, check whether your business needs insurance, licences or industry registrations. This depends on your sector and the type of work you do.
You may need:
- Public liability insurance
- Professional indemnity insurance
- Employer’s liability insurance if you employ staff
- Cyber insurance if you handle sensitive data
- Data protection registration with the ICO
- Sector-specific licences or approvals
These costs should be included in your start-up budget. They can protect you, your clients and your business if something goes wrong.
Create a simple financial plan
You do not need a complicated business plan to get started, but you should have a clear financial plan. This helps you understand whether your idea is viable and what level of sales you need to cover costs.
Your start-up financial plan should include:
- Expected sales
- Fixed monthly costs
- Variable costs
- Start-up costs
- Tax savings
- Owner drawings or salary
- Break-even point
- Cash flow forecast
Cash flow is especially important. A business can be profitable on paper but still struggle if customers pay late or costs arrive before income.
Get advice before you register
Registering a company is easy, but choosing the right structure and setting it up properly takes thought. Once your company is formed, you will have filing responsibilities and tax obligations, even if you do not trade straight away.
Professional advice before registration can help you avoid common mistakes, including choosing the wrong business structure, using the wrong share setup, missing tax registrations, failing to budget for VAT, or not keeping records correctly from day 1.
Final thoughts
Before registering a company, you should understand what structure suits you, what responsibilities you will take on, how tax will work and how you will manage your records. A limited company can be a strong choice, but it needs to be set up and managed properly.
If you are starting a new business, taking advice early can save you time, money and stress. You can make better decisions, stay compliant and build your business on stronger financial foundations.
If you are planning to register a company or launch a new business, contact FHP Accounting today for practical start-up accounting, tax, bookkeeping and business support.