If you’re trying to budget for support this year, the outsourced back-office support cost for a UK accounting practice varies far more than most fee guides suggest. Depending on scope, hours, and whether you go hourly or fixed-fee, practices are paying anywhere from a few hundred to several thousand pounds a month, and understanding what drives that range makes it much easier to buy the right service instead of the cheapest one.
This guide breaks down current UK hourly rates and fixed monthly retainers, the factors that push costs up or down, and how to compare quotes properly so you’re paying for the right scope rather than just the lowest number.
What Counts as Outsourced Back-Office Support for an Accounting Practice?
Back-office support typically covers the recurring, non-advisory work that keeps a practice running. In practice, that usually means:
- Data entry and bank reconciliations
- Payroll prep and payslip checks
- Client onboarding admin, including document collection
- HMRC and Companies House portal tasks
- General inbox and query management
None of it requires a qualified accountant to perform, but all of it needs to happen reliably every week.
Outsourced Back-Office Support Cost in the UK: 2026 Price Ranges
Hourly Rates
Hourly outsourced support in the UK generally runs from around £15 to £40 per hour, depending on the complexity of the task and the experience level required.
What Sits at Each End of That Range
Simple, high-volume work such as data entry typically sits close to the £15 to £20 mark, while tasks that touch HMRC correspondence or payroll calculations tend to sit nearer £30 to £40, reflecting the extra care and review those tasks need.
Fixed Monthly Retainers
Fixed-fee monthly packages for ongoing back-office support commonly sit between roughly £500 and £900 per month for a part-time equivalent of support, scaling up from there for full-time or multi-person cover. That’s broadly in line with wider UK market benchmarking, where fixed-fee bookkeeping and back-office retainers typically range from £150 to £950 a month depending on scope.
As a working example, a two-partner practice with around 120 personal tax clients might pay in the region of £650 a month for roughly 15 hours a week covering reconciliations, portal admin, and light client-facing queries, considerably less than the cost of even a part-time in-house hire once overheads are included. The outsourced back-office support cost you’re quoted should always map back to a clear number of hours or a defined scope, not just a vague “package.”
What Drives Outsourced Back-Office Support Cost Up or Down
Three factors move the price more than anything else:
- The complexity of the tasks involved
- The number of clients or transactions covered
- How much of the work is genuinely repeatable versus requiring judgement calls each time
Scope and Complexity of Tasks
Simple, high-volume tasks like data entry and reconciliation sit at the lower end of outsourced pricing, while tasks that touch regulatory bodies, or payroll processing typically sit higher, because they carry more risk if something is missed. Workload also tends to spike around compliance deadlines. For example, many practices are now factoring in the extra quarterly admin created by Making Tax Digital for ITSA when they scope out ongoing support.
Client Volume and Transaction Count
A practice with 50 straightforward sole trader clients will generally pay less for reconciliation support than one with 50 clients running multiple bank accounts and higher transaction volumes, even though the client count is identical; it’s the transaction volume that drives the hours.
In-House Costs vs Outsourced Back-Office Support Cost
The True Cost of an In-House Hire
A full-time in-house administrator in the UK costs more than just the headline salary once you add:
- Employer National Insurance contributions
- Pension contributions
- Recruitment and onboarding costs
- Sickness and holiday cover
- Desk space, equipment, and software licences
Once National Insurance and pension contributions are factored in, an in-house hire often costs a practice considerably more per month than an equivalent outsourced arrangement.
What Outsourcing Removes From That Equation
Outsourcing also removes the recruitment, training, and sickness cover problems that come with an in-house hire, which is part of why the outsourced back-office support cost comparison usually favours outsourcing for smaller and mid-sized practices.
People Also Ask About Outsourced Back-Office Support Cost
Here are the real questions UK practices are asking Google about outsourced back-office support and its cost.
What is back office outsourcing?
Back office outsourcing means handing recurring, non-client-facing administrative work, such as data entry, reconciliations, payroll prep, and portal admin, to an external team, so in-house staff can stay focused on advisory work and client relationships instead of routine processing.
How much does outsourcing bookkeeping cost?
Outsourced bookkeeping in the UK generally costs between £20 and £50 an hour, or roughly £150 to £950 a month on a fixed retainer, depending on transaction volume and how much reconciliation and reporting work is included.
How much does outsourced payroll cost UK?
Outsourced payroll is usually priced separately from general back-office support because of its compliance risk. Expect to pay somewhere between £4 and £8 per employee per month, often with a minimum monthly fee for very small headcounts, on top of any wider support retainer.
How much should I charge for bookkeeping services in the UK?
Typical UK bookkeeping charge-out rates run from about £15 to £45 an hour depending on experience and task complexity, or £100 to £500 a month for straightforward monthly packages.
How much are accountants charging for MTD?
Fees vary by practice, but many UK accountants are now adding £10 to £30 a month per client, or a quarterly fee of £50 to £150, specifically to cover the extra submissions required under Making Tax Digital for ITSA.
Is AI replacing bookkeepers?
AI is automating some repetitive tasks like data entry and categorisation, but UK practices still need trained people to manage AML compliance, correct software errors, and handle client-specific judgement calls, which is why most outsourced support today blends automated tools with human oversight rather than removing people from the process.
How Virtual Service Assists Prices Back-Office Support
We keep our pricing tied directly to the scope of work agreed with each practice, whether that’s a handful of hours a week or full ongoing cover across onboarding, reconciliations, and portal admin. You can see the full range of what’s included in our outsourced support services before deciding what level of cover makes sense for your practice.
Getting an Accurate Quote for Your Practice
For context on the wider cost of hiring staff directly, including salary, tax, and pension obligations, GOV.UK’s guidance on employing staff is a useful comparison point. The real cost of back-office work is rarely just the invoice; it’s the senior time it frees up, and the deadlines it stops falling through the cracks. Practices that price outsourced back-office support cost against that full picture, rather than the headline hourly rate, tend to make the better long-term call. If you’d like a clear, scope-based quote for your own practice, get in touch and we’ll walk you through exactly what’s included.