Outsourcing vs In-House Accounting: Which is Right for Your Business?
Published 22nd of August 2016·Updated 19 April 2026
Reviewed by: Reviewed for accuracy April 2026
For most small and medium-sized UK businesses, outsourcing accounting is cheaper and less risky than hiring in-house staff. A sole trader or small limited company can typically get bookkeeping, VAT returns and year-end accounts for between £500 and £3,000 per year through an outsourced accountant, compared to a minimum salary cost of £28,000 or more for a full-time in-house hire.
Short Summary
Outsourcing suits most small businesses that need accurate accounts and compliance without the overhead of a permanent member of staff. In-house accounting makes more sense when your transaction volume is very high or your business requires daily financial reporting.
Cost is not the only factor. In-house accountants give you direct, immediate access to your financial data. Outsourced firms may not respond as quickly to ad-hoc queries.
Many businesses use a hybrid model: outsourcing compliance work such as VAT returns and annual accounts, while managing day-to-day bookkeeping internally.
If you outsource, choose a firm regulated by a recognised professional body such as the Institute of Chartered Accountants in England and Wales (ICAEW) or the Association of Chartered Certified Accountants (ACCA).
What are the advantages of in-house accounting?
Keeping accounting in-house gives you direct oversight of your financial position. A member of staff working alongside you understands your business, your customers and your suppliers in a way that an external firm may not.
For businesses with high transaction volumes, an in-house bookkeeper processing invoices and payments daily reduces the risk of errors building up over weeks or months. Real-time visibility of cash flow can also help you make faster commercial decisions.
In-house staff can also provide wider finance support beyond pure accounting, such as chasing debtors, managing payroll, and producing management information for board meetings.
What are the disadvantages of in-house accounting?
The cost is the primary drawback. A full-time in-house accountant or bookkeeper involves salary, employer National Insurance contributions (currently 13.8 per cent above the secondary threshold), pension contributions under auto-enrolment, holiday pay and potential sick pay. The total employment cost is typically 20 to 30 per cent higher than the stated salary.
You also take on responsibility for compliance with Making Tax Digital (MTD) requirements, PAYE, and Companies House filings. If your in-house staff member makes an error, you remain liable for penalties from HMRC.
What are the advantages of outsourcing accounting?
Outsourcing transfers the compliance burden to professionals who specialise in it. A good accountancy firm will monitor changes in tax law and apply them to your accounts automatically. The risk of errors leading to HMRC penalties is substantially lower.
A single monthly or annual fee typically covers software costs, filing fees and professional indemnity insurance. You avoid the hidden HR costs of employment: no recruitment fees, no training budget, no coverage required during illness or holiday.
For smaller businesses, outsourcing also gives access to qualified chartered accountants at a cost that would not otherwise be affordable.
What are the disadvantages of outsourcing?
You give up some day-to-day control. If you need an urgent answer to a financial query, you may have to wait for a response from your accountant rather than walking across the office.
There is also a dependency risk. If your outsourced firm closes, is acquired, or experiences staff turnover, continuity of your accounts can be disrupted. Choosing a well-established, regulated firm reduces but does not eliminate this risk.
In-house vs outsourcing: a direct comparison
| Factor | In-house | Outsourced |
|---|---|---|
| Annual cost (small business) | £30,000+ (salary + on-costs) | £500 - £3,000 |
| Compliance assurance | Depends on staff quality | High (regulated professionals) |
| Real-time access to data | High | Moderate |
| Flexibility | Lower (tied to employee) | Higher (scale up or down) |
| Risk if key person leaves | High | Low |
| HMRC investigation support | Limited | Included (most firms) |
Which option is right for your business?
For a sole trader or business with annual turnover under £1 million and straightforward finances, outsourcing almost always makes better financial sense. For a business turning over several million pounds with complex payroll, inter-company transactions, or multiple VAT registrations, an in-house finance function may be justified.
A practical middle ground is to manage your own day-to-day bookkeeping using cloud accounting software such as Xero or QuickBooks, and pay an outsourced accountant to review and file quarterly VAT returns and your year-end accounts. This reduces the outsourcing cost further while keeping you close to your day-to-day numbers.
Frequently asked questions
How much does outsourced accounting typically cost for a small UK business?
A sole trader with simple accounts typically pays between £500 and £1,500 per year. A small limited company with payroll, VAT and year-end accounts might pay between £1,500 and £4,000 per year. Prices vary significantly by region, with London-based firms generally charging more than those in other parts of the UK.
Do I need a qualified accountant or will a bookkeeper do?
Bookkeepers handle day-to-day transaction recording, bank reconciliations and basic reporting. They are not qualified to sign off statutory accounts or provide tax advice. A qualified accountant (ICAEW, ACCA or CIMA) is required for filing annual accounts for a limited company and for complex tax matters. Many businesses use a bookkeeper for routine work and an accountant for compliance.
Can I do my own accounting as a sole trader?
Yes. HMRC's Making Tax Digital requirements mean you need compatible software to keep digital records, but there is no legal requirement to use an accountant if you are a sole trader. Many sole traders manage their own accounts using software such as FreeAgent or QuickBooks. An accountant can still add value by identifying tax-saving opportunities you may have missed.
What should I look for when choosing an outsourced accounting firm?
Check that the firm is regulated by a recognised professional body (ICAEW, ACCA or CIMA). Ask whether they carry professional indemnity insurance. Find out who will handle your account day-to-day, not just the partner who signs off the work. Request references from clients with a similar business profile to yours.
Is cloud accounting software a substitute for an accountant?
Software such as Xero, QuickBooks or Sage automates bookkeeping and can reduce the time an accountant spends on routine data entry. It does not replace the judgement, tax planning and compliance expertise that a qualified accountant provides. Most outsourced accountants now work with cloud software and can access your books directly, which keeps their fees lower.