Running a successful business takes more than a great idea and hard work. You also need a clear picture of your finances and the confidence to make sound decisions. For many small business owners, especially women juggling a company alongside caring responsibilities or a portfolio career, the temptation is to handle the numbers alone. Women now make up a significant and growing share of the UK’s self-employed workforce; see our Women in Business: Key UK Facts page for the latest figures.

Accountants and auditors for small businesses become valuable once transactions grow in volume or complexity. A DIY approach can work when sales are simple, but as turnover and staff numbers grow, the hours spent on bookkeeping, tax and compliance pull you away from revenue-generating work. Knowing when to hire an accountant or auditor can protect both your time and your bottom line. Used well, they reduce your tax bill, improve cash flow, strengthen internal controls and free you to grow the company. This guide explains when each is worth investing in, what they cost, and what to expect.

When your business legally needs an audit

A statutory audit is an independent examination of a company’s annual accounts, required by law once a business reaches a certain size. It is not a punishment; it is a check that your financial statements give a true and fair view.

As of 2026, a UK company qualifies as small and is normally exempt from audit if it meets at least two of the following thresholds set out in the Companies Act 2006 (as amended in 2024): turnover of no more than £10.2 million, balance-sheet assets of no more than £5.1 million, and an average of no more than 50 employees. Sole traders and ordinary partnerships are not required to have a statutory audit.

Even small companies can lose the exemption if they are part of an ineligible group, such as one that includes a public company or an authorised insurance firm. If you run a limited company, check your audit status at the start of each financial year; rapid growth, taking on investment or joining a larger group can change your position. If you are unsure, a registered auditor or ICAEW/ACCA-qualified accountant can confirm your status.

When a voluntary audit is worth the cost

Even if you fall below the thresholds, you may choose a voluntary audit. This can be valuable if you are seeking external investment, applying for a significant loan, preparing the business for sale, or tendering for large public-sector contracts. A clean audit report gives lenders, investors and buyers confidence that your figures are reliable and that your internal controls are robust.

Auditors do more than check historical figures. They assess whether your financial statements give a true and fair view, review accounting policies and test samples of transactions. Through this process they can identify weaknesses in record keeping, highlight unusual transactions and recommend improvements to processes. For a growing business, that insight can be just as useful as the final report. If you are a woman founder approaching funders for the first time, independently verified accounts can reinforce confidence in your figures.

What a UK accountant can do for your small business

Most small business owners turn to an accountant first for help with tax returns, VAT and payroll. That is only part of the picture. A good accountant can act as a financial partner throughout the life of your business, from choosing a structure to scaling up. For women in business, who often manage a company alongside other responsibilities, that partnership can be the difference between constantly firefighting finances and having headroom to plan.

Compliance and record keeping

Day-to-day, an accountant can manage bookkeeping, run payroll, prepare VAT returns under Making Tax Digital (MTD) and ensure corporation tax or self-assessment filings reach HMRC on time. They can also set up cloud accounting software, reconcile accounts and produce management accounts so you understand profitability, cash flow and tax liabilities in real time.

From April 2026, self-employed people and landlords with qualifying income above £50,000 must keep digital records and submit quarterly updates under MTD for Income Tax Self Assessment, with a £30,000 threshold following from April 2027 (HMRC, 2026). If your VAT-taxable turnover exceeds the £85,000 registration threshold (HMRC, 2026/27), you must also register for VAT and file under MTD for VAT. An accountant can help you choose compatible software and build the habits now so the transition is smooth. Our Making Tax Digital Sole Trader: 2026 Checklist for Women covers the practical steps.

Tax planning and reliefs

Where accountants often add the most value is in proactive advice. They can identify tax reliefs and allowances you might miss, such as the Annual Investment Allowance, which is permanently set at £1 million from 1 April 2023 (HMRC, 2023/24 onwards), research and development (R&D) tax relief, creative industry tax reliefs or business rates relief. For the 2026/27 tax year, corporation tax is 25% on profits above £250,000 and 19% on profits of £50,000 or less, with marginal relief applying between the two (HMRC, 2026/27). An accountant can model the most efficient way to extract profits, pay yourself and reinvest in the business.

Ask your accountant to check whether you are claiming reliefs you may have overlooked. Women-led businesses in tech, creative and professional services can miss out on valuable reliefs simply because no one flags them.

Business structure and growth advice

Accountants can advise on the most tax-efficient business structure, whether sole trader, partnership or limited company. They can also help with succession planning, share schemes, raising finance or preparing forecasts for investors. Many women founders start as sole traders for simplicity; an accountant can tell you when incorporating would cut your tax bill or limit your personal liability. If you are deciding between structures, our Sole trader vs limited company UK: MTD changes the maths explains how the rules affect your choice.

How to choose the right accountant or auditor

You do not need to put an accountant or auditor on a monthly retainer from day one. Many small businesses start with ad-hoc advice at key moments: choosing a legal structure, registering for VAT, taking on the first employee or preparing for a funding round. As turnover, staff numbers and transactions increase, a regular accounting relationship usually becomes cost-effective.

When selecting an accountant, look for membership of a recognised UK professional body such as the Institute of Chartered Accountants in England and Wales (ICAEW), the Association of Chartered Certified Accountants (ACCA), the Chartered Institute of Management Accountants (CIMA) or the Chartered Institute of Taxation (CIOT). These bodies set standards for conduct, qualifications and continuing professional development. For audit work, only a registered auditor can carry out a statutory audit.

Look for a firm that communicates in plain English, has clients in your sector, and can meet at times that suit your working pattern. If you balance business with caring responsibilities, flexible contact options and clear deadlines matter as much as the qualification.

What to expect on fees

Fees vary widely. Some accountants charge by the hour, while others offer fixed monthly packages that include bookkeeping, payroll and VAT. The cost depends on turnover, transaction volume, sector complexity and where your business is based. Audit fees for a small company often start at several thousand pounds and rise with size and sector risk.

Ask for a clear engagement letter, check that the scope matches your needs, and consider whether the firm has experience in your sector. A good accountant should explain their advice in plain English and be happy to discuss how their work will save or make you money. When you compare fees, weigh them against the value of your own time and the cost of errors or missed reliefs. For women in business, protecting time for revenue-generating work is often the strongest argument for hiring support.

When accountants and auditors for small businesses become essential

Accountants and auditors are not essential for every micro-business, but they become valuable as soon as the complexity of your finances starts to eat into your time or expose you to risk. The right question to ask is not simply “Can I afford the fee?” but “What is the cost of getting this wrong, or of not having time to grow the business?”

Used strategically, professional financial support can help you pay the right amount of tax, access funding, tighten controls and make better decisions. That is when accountants and auditors for small businesses stop being a cost and start becoming an investment in the future of your company.

Practical next steps for your business

• Check whether your company meets the small company audit exemption thresholds: turnover £10.2 million, balance-sheet assets £5.1 million and 50 employees.
• If your self-employment or property income is above £50,000, confirm you are ready for MTD for Income Tax Self Assessment from April 2026. See HMRC’s guidance on when to sign up for MTD for Income Tax Self Assessment.
• Ask your accountant to review reliefs such as the Annual Investment Allowance, R&D tax relief and business rates relief.
• Verify your accountant’s membership of ICAEW, ACCA, CIMA or CIOT before signing an engagement letter.
• Compare fixed monthly fees against hourly rates, and weigh the cost against the time you would spend doing the work yourself.
• If you are a woman founder seeking funding, ask whether audited or accountant-prepared accounts would strengthen your application.