Tax Return Costs for Startups in the UK

Launching a new venture in the UK? That’s great. But you need to understand that it comes with responsibilities, especially when it comes to taxes. You need to manage cash flow and scale your operations, and understand your financial obligations to HM Revenue and Customs (HMRC). Moreover, you must know the costs you are paying, including tax return costs for startups.

This blog discusses startup tax return costs, the cost of filing business taxes, and looks at the factors that determine your small business tax return cost.

What is a Tax Return for Small Businesses?

A tax return is a filing made to HMRC to report income and other relevant information and, where applicable, calculate the tax due. The type of tax return you require depends on the business structure.

For instance, a sole trader usually files a Self Assessment tax return, whereas a limited company normally submits a Company Tax Return (CT600) to HMRC and files annual accounts with Companies House.

What are Tax Return Costs for Startups?

The first thing you need to know is that there is no fixed price for every business because every startup has different financial requirements. Generally, startup tax return costs range from £150 to £400 for a basic sole trader Self Assessment. For a limited company’s Corporation Tax return, it can range from £300 to £800.

The following are indicative UK market estimates rather than official HMRC rates. Actual fees vary according to the services included, complexity and provider.

Business type	Estimated Annual Tax Return Cost
Sole trader	£150–£400
Limited company	£500–£2,000+
Partnership	£300–£1,000

Disclaimer: The figures in the table are general estimates of tax return costs for startups and may vary based on location, accounts’  complexity, accountants’ fees, and specific HMRC requirements.

What Determines Your Tax Return Costs?

There is no single flat rate for startup accounting. The fees charged by an accountant depend on factors such as business model, payroll services, the volume of financial transactions, bookkeeping quality, and the complexity of your tax affairs. Let’s discuss some factors that influence your startup tax preparation fees.

Business Structure

Legal trading structure can affect tax return costs for startups. Sole traders usually have simple Self Assessment returns. Limited companies and partnerships can have additional accounting and tax reporting requirements. As a result, professional fees may be higher than for a straightforward sole trader. Hence, they have higher corporate tax return pricing.

Bookkeeping Quality

Good bookkeeping is important because it can dramatically reduce your business tax accountant fees. If your records are organised, up to date, digitally stored, and reconciled regularly, an accountant spends less time preparing your return. Hence, this reduces overall tax return costs for startups.

VAT Registration

VAT registration often increases accounting fees because you may require ongoing VAT return preparation, VAT record reviews, and compliance with Making Tax Digital (MTD) requirements.

Annual Turnover

Your annual turnover also determines your tax return costs. If your business generates higher revenue, it generally means it has more transactions, additional invoices, payroll responsibilities, and greater reporting requirements. This increases the accountant’s workload and therefore the tax return costs for startups.

Payroll Services

If your startup employs staff, you need Pay As You Earn (PAYE) administration, calculating and reporting Income Tax and National Insurance contributions (NICs) through PAYE, and payroll submissions. You also need auto-enrolment pension duties and Real Time Information (RTI) submission rules that streamline the fees.

Many UK accountants combine these services into their startup bookkeeping and tax services, therefore increasing the overall package price.

How Much Does a Startup Tax Return Cost?

As discussed above, the tax return costs for startups depend on the business structure, transaction volume, accounts complexity, and whether additional services are needed.

Typically, startups pay an accountant’s fee to prepare and file tax returns.

A simple sole trader Self Assessment return may cost less, because of the simple business structure. A limited company’s overall accounting package may include annual accounts, Corporation Tax calculations and the Company Tax Return, with VAT, payroll and specialist tax advice added where required. Therefore, it usually costs more than a sole trader.

What is the Average Cost of Startup Tax Filing?

In the UK, the average tax return costs for startups depend mainly on the business structure, accounts’ complexity, and the accountant’s fee. For a small limited company, fees for annual accounts and Corporation Tax compliance may range from around £500 to £1,500 or more, depending on the provider and complexity.

Alternatively, many startups use monthly accounting packages, and it ranges from £75 to £300 or more per month, depending on the services included. This package combines tax preparation with ongoing bookkeeping and compliance

What is Included in Startup Tax Preparation?

Depending on the package, professional fees may cover annual accounts preparation, Corporation Tax calculations and the Company Tax Return for a limited company, or Self Assessment for a sole trader or partner. Bookkeeping, VAT, payroll and financial reporting may be charged separately or included in a broader package.

Some UK accounting firms also offer ongoing bookkeeping and quarterly management reports.

How to File a Small Business Tax Return?

Filing a small business tax return involves reporting your business income, expenses, and tax information to HMRC and paying any tax due. Here is the process to report your tax return:

• Identify Your Business Tax Filing Requirements

The first thing you need to do is determine what type of business you operate. If you are a sole trader, file a Self Assessment tax return with HMRC and report business income, allowable expenses, and taxable profit.

Remember, tax return costs for startups depend on the business structure and the complexity of accounts.

If you are a limited company, you need to prepare annual accounts and submit a Company Tax Return (CT600) to HMRC with the required supporting documents.

• Keep Accurate Financial Records

Maintain records of your income, sales, expenses, purchase invoices, bank statements, receipts, payroll records (if you employ staff), and VAT records (if VAT registered).

Good record-keeping helps you calculate your taxable profit and report it accurately to HMRC.

• Calculate Your Taxable Profit

Work out your taxable profit by adding up business income, deducting allowable business expenses, and applying relevant tax reliefs or allowances.

For limited companies, taxable profits are used to calculate Corporation Tax. whereas. For sole traders and partners, taxable profit is used to calculate income tax and NI liabilities.

• Submit the Return to HMRC

Complete the correct tax return and submit it online through HMRC’s systems or using approved accounting software. You can also use an accountant to prepare and submit returns on your behalf. However, this may affect tax return costs for startups.

• Pay Any Tax Due by the Deadline

After submitting your return, you must pay any tax owed by the relevant deadline. Pay Self Assessment tax by 31 January, with possible payments on account. Most companies must pay Corporation Tax by 9 months and 1 day after the end of the accounting period.

• Keep Records After Filing

It is important to keep business records and supporting documents for the required retention period.

What are DIY vs Professional Startup Tax Filing Costs?

Many business owners wonder whether they should complete their own tax return or hire an accountant. DIY filing can reduce tax return costs for startups, but you still have to cover costs for accounting software or other services. However, hiring an expert ensures accurate tax calculations and reduces the risk of non-compliance.

DIY Tax Filing

Doing your tax filing yourself can lower upfront costs, and it is suitable for very small sole traders. However, it can be time-consuming, and there is a greater risk of errors.

Hiring a Professional Accountant

A qualified accountant ensures your tax calculations are accurate, offers better tax planning for startups, and reduces non-compliance risks. They also help you identify available tax reliefs and save you time.

How to Reduce Your Tax Return Costs for Startups?

If you need affordable startup tax preparation, consider these strategies:

• Keep your accounts updated throughout the year. This reduces accountant preparation time.
• Use modern accounting software to automate bookkeeping, invoice management, and financial reporting. It helps to reduce long-term startup accounting costs.
• Organise your financial records such as receipts, invoices, payroll records, and bank statements, and store them digitally to make tax preparation faster and easier.
• Plan Taxes Throughout the Year. It will help avoid unexpected liabilities while identifying available reliefs before year-end.
• Hire an accountant if you have complex accounts and tax matters.

Is Hiring an Accountant Worth the Cost?

When hiring an accountant for your startup, consider it as an investment. For many startups, hiring a professional provides better financial management, expert tax planning, improved compliance, and valuable time savings that outweigh the cost. Keep in mind that a good accountant often saves you more in taxes than they charge in fees.

The Bottom Line

Understanding tax return costs for startups is crucial for budgeting and long-term financial success. The cost of filing business taxes depends on your business size, legal structure, bookkeeping practices, and reporting obligations. If you have complex accounts and tax matters, it is recommended to hire an accountant.

Investing in professional startup bookkeeping and tax services can help identify allowable expenses and reliefs, reduce errors, and maintain compliance with HMRC requirements.

If you are a startup business in the UK and need the best accountant, we are here to help. At AccountingFirms, you can find an experienced accountant who can help you file and submit your tax returns on time while ensuring HMRC compliance.

Browse accountants by qualification, location, and industry, and choose the one that meets your requirements.