Whether you need an accountant, and how much it should cost, depends almost entirely on your business structure and how much of the admin you are willing to do yourself. A sole trader with simple finances can often manage without one, while a limited company juggling payroll, VAT and Corporation Tax usually finds the fee pays for itself in saved time and avoided mistakes.
This guide covers realistic 2026 UK accountant costs by business type and service level, so you can budget properly and know what you are actually paying for.
A sole trader accountant costs £300 to £900 per year for a straightforward Self Assessment service. A limited company accountant handling annual accounts, Corporation Tax and basic compliance typically costs £900 to £2,500 per year. Add payroll at £5 to £15 per employee per month and VAT returns at £30 to £80 per quarter if applicable. Bookkeeping, if not done in-house, adds £100 to £400 per month depending on transaction volume.
Accountant Costs by Business Type
The single biggest factor in cost is your business structure, since it determines what you are legally required to file and how complex that filing is. The table below covers realistic annual costs for 2026.
| Service | Typical Annual Cost |
|---|---|
| Sole trader, simple Self Assessment | £300 to £600 |
| Sole trader, more complex finances | £600 to £900 |
| Limited company, small (under £85k turnover) | £900 to £1,500 |
| Limited company, growing (£85k to £250k turnover) | £1,500 to £2,500 |
| Partnership accounts and tax returns | £600 to £1,400 |
| One-off tax return only, no ongoing service | £150 to £350 |
These figures typically cover annual accounts preparation, the relevant tax return (Self Assessment or Corporation Tax), and basic Companies House filings for limited companies. VAT returns, payroll and bookkeeping are usually quoted and charged separately.
Add-On Services and Their Costs
- VAT returns: £30 to £80 per quarter for a straightforward return, more for businesses on the Flat Rate Scheme or with complex partial exemption.
- Payroll: £5 to £15 per employee per month, or a flat £20 to £50 monthly fee for very small teams, covering payslips, RTI submissions and pension auto-enrolment.
- Bookkeeping: £100 to £400 per month depending on transaction volume, if you are not doing this in-house or via software.
- Management accounts: £150 to £400 per month for businesses wanting monthly or quarterly financial reporting beyond the statutory minimum.
- Tax planning and advisory: Usually charged separately at £100 to £250 per hour, or bundled into a premium package for growing businesses.
- Company formation: £50 to £150 if handled through your accountant rather than done yourself for £12 at Companies House.
Bookkeeper vs Accountant
These two roles are often confused but cover different work. A bookkeeper handles the day to day: recording transactions, reconciling bank statements, chasing invoices and keeping your accounting software up to date. This typically costs £20 to £40 per hour or £100 to £300 per month for a small business.
An accountant works at a higher level: preparing annual accounts, filing tax returns, advising on tax efficiency, and ensuring statutory compliance. Many small businesses use both, a bookkeeper for the ongoing admin and an accountant for the annual filings and strategic advice, since the two skill sets rarely overlap fully even within the same firm.
Fixed Fee vs Hourly Rate
Most modern accountancy firms, particularly those aimed at small businesses, now quote a fixed annual or monthly fee covering an agreed scope of work. This is generally better for budgeting than an open hourly rate, since you know your cost upfront and are not penalised for asking questions throughout the year.
Hourly rates still apply for one-off advisory work outside the fixed scope, typically £100 to £250 per hour depending on the seniority of the accountant and the complexity of the query. Always clarify what is included in a fixed fee quote and what would trigger an additional charge before signing an engagement letter.
When to Hire an Accountant
Sole traders with a single income source and straightforward expenses can often manage with free HMRC tools and cheap software. The case for an accountant strengthens once you have multiple income streams, are approaching the VAT threshold, are considering incorporating, or simply want the time back.
Limited companies have more complex statutory obligations (Corporation Tax, Companies House filings, potentially payroll) that make professional help worthwhile for most directors, even if the business is small. The cost of getting a filing wrong, in penalties and corrected returns, often exceeds the accountant's fee that would have prevented it.
How to Choose and Save Money
- Check regulation. Look for a firm regulated by ICAEW, ACCA or AAT, which provides a route for complaints and ensures a baseline standard of competence.
- Get a fixed fee quote. Ask exactly what is included and what would cost extra, particularly for VAT, payroll and advisory work.
- Ask about sector experience. An accountant familiar with your industry will flag relevant deductions and pitfalls faster than a generalist.
- Use software to cut bookkeeping costs. A well-maintained Xero or QuickBooks account reduces the time (and therefore cost) an accountant needs to spend tidying your records before filing.
- Review annually. As your business grows or simplifies, your accounting needs change. It costs nothing to switch, so do not stay with a service tier that no longer fits.
A small business accountant costs £300 to £900 a year for a sole trader and £900 to £2,500 a year for a limited company in the UK in 2026, with VAT, payroll and bookkeeping usually quoted separately. Get a fixed fee quote, check the firm is properly regulated, and reassess your needs annually as the business changes. If you are still deciding on your business structure, see our guide on registering as a sole trader too.