One of the first questions any business owner asks when considering professional accounting support is: how much does an accountant cost per month in the UK? The answer varies significantly depending on the size and complexity of your business, the services you need, and the type of firm you engage. This comprehensive AccFirm guide provides up-to-date monthly accounting costs for sole traders, limited companies, and SMEs in 2025/26 along with clear guidance on what each price bracket includes, what to watch out for, and how to ensure you get genuine value from your accounting spend.
Why Monthly Pricing Has Become the Standard for UK Accountants
The accountancy profession has moved steadily away from hourly billing towards fixed monthly fees over the past decade, driven largely by the rise of cloud accounting software, Making Tax Digital compliance, and business owner demand for predictable costs. Monthly retainer pricing for accountants is now the standard across most UK accounting firms serving small and medium businesses. It offers:
- Budget certainty: You know exactly what your accounting costs per month will be, with no surprise bills at year end
- Year-round access: A monthly fee encourages proactive communication you are more likely to call your accountant for advice if you are already paying a flat monthly fee
- Software inclusion: Most monthly packages now include cloud accounting software subscriptions (Xero, QuickBooks, or FreeAgent) within the monthly cost
- Scope clarity: Fixed-fee monthly proposals set out exactly what is included and what generates additional charges removing ambiguity
How Much Does an Accountant Cost Per Month for a Sole Trader?
Sole trader accounting costs per month are the lowest in the market, reflecting the simpler compliance requirements compared to limited companies. Based on 2025/26 market data:
| Sole Trader Service Scope | Monthly Cost Range |
| Self Assessment only (year-end service, no monthly support) | One-off £150–£400/year (not monthly) |
| Basic monthly package (bookkeeping support + SA return) | £40 – £75 per month |
| Mid-tier package (VAT returns + SA + expense review) | £75 – £125 per month |
| Full-service package (VAT, payroll, quarterly reviews, SA) | £100 – £200 per month |
For most sole traders with straightforward affairs and turnover below £50,000, a monthly accounting cost of £50–£100 provides comprehensive compliance support including Self Assessment, quarterly expense reviews, MTD compliance, and responsive email support. Sole traders with VAT registration or employees will pay towards the higher end of the range.
How Much Does an Accountant Cost Per Month for a Limited Company?
Limited company accounting costs per month are higher than sole trader costs, reflecting additional compliance obligations including Corporation Tax, Companies House filings, director payroll, and dividend planning. The monthly cost of a limited company accountant in 2025/26:
| Limited Company Service Scope | Monthly Cost Range |
| Micro-company, no employees, no VAT (basic compliance) | £75 – £125 per month |
| One-director company with payroll (salary + dividends) | £100 – £175 per month |
| Company with VAT registration and employee payroll | £125 – £250 per month |
| Growing SME with monthly management accounts | £200 – £500 per month |
| Full CFO-level service (reporting, forecasting, board support) | £400 – £1,500+ per month |
The most common monthly cost for a single-director limited company with a simple payroll and quarterly VAT returns is between £125 and £200 per month. This typically includes: annual accounts preparation, Corporation Tax return, director payroll, quarterly VAT returns, year-end dividends advice, and Self Assessment for the director.
What Should Be Included in a Monthly Accounting Package?
When evaluating accountant costs per month, always ask for a clear written scope of services. A comprehensive monthly accounting package for a small limited company should include:
- Annual statutory accounts preparation (Companies House-compliant)
- Corporation Tax return (CT600) preparation and filing
- All director payroll: monthly payslips, RTI submissions, P60s, P11D
- VAT return preparation and Making Tax Digital submission
- Director Self Assessment tax return
- Dividend vouchers and board minutes for each dividend payment
- Companies House confirmation statement
- Cloud accounting software subscription (Xero, QuickBooks, or FreeAgent)
- Unlimited email support for day-to-day queries
- At least one structured review call per year (quarterly is ideal)
Hidden Costs to Watch Out For
When comparing accountant costs per month, the headline price is not always the full cost. Common additional charges include:
- Setup or onboarding fees when switching accountants can range from £100 to £500
- Additional payroll employees above a set number check whether the quote covers all your staff
- HMRC enquiry response some firms charge extra for dealing with HMRC compliance checks
- Reference letters for mortgages, visa applications, or business financing
- Additional Self Assessment returns for spouses or family members
- Bookkeeping input (entering transactions): some firms require clean, reconciled records and charge extra for bookkeeping from bank statements
AccFirm includes all of the above in its fixed monthly packages with no hidden charges. We provide full scope transparency in our engagement letters so clients know exactly what they are paying for each month.
Is It Cheaper to Do Accounting Yourself vs Hiring an Accountant?
For very simple sole traders with low turnover, self-filing using HMRC’s free online services is technically an option. But the cost comparison is rarely as straightforward as it appears. Consider:
- Time cost: DIY accounting typically takes a sole trader 5–15 hours per year even for simple affairs. At your billable rate, this may cost more than an accountant’s monthly fee
- Missed deductions: Studies consistently show that self-filing sole traders miss an average of £600–£1,500 in allowable deductions per year far exceeding a monthly accounting fee
- Penalty risk: Late or incorrect filings cost money. An accountant guarantees timely submissions
- MTD compliance: From April 2026, quarterly digital reporting is mandatory for many self-employed individuals increasing the complexity of DIY accounting significantly
Frequently Asked Questions: Accountant Costs Per Month
What is a reasonable monthly accounting fee for a one-person limited company?
For a single-director limited company without employees and with simple affairs, a reasonable monthly accounting fee in the UK is £100–£150 per month. This should include annual accounts, Corporation Tax, director payroll, and director Self Assessment as a minimum.
Does the monthly accounting fee include VAT?
Most UK accounting firms quote fees exclusive of VAT. Add 20% to compare true costs. At AccFirm, our monthly fee quotes are stated clearly as exclusive or inclusive of VAT, so there are no surprises.
Can I negotiate accounting fees?
Yes accounting fees for small businesses are negotiable, particularly if you provide clean, well-organised records, use cloud accounting software that reduces manual entry, and commit to a longer-term engagement. AccFirm offers competitive fixed-fee packages with no long-term tie-in contracts.