UK · Decision guide · Bookkeeping

Outsourced Bookkeeping vs In-House Bookkeeper

The short answer

For most small UK businesses, outsourced bookkeeping is the better choice: it costs less, carries on when someone is on holiday or off sick, and removes the job of supervising the work yourself. An in-house bookkeeper costs a salary plus employer National Insurance, workplace pension, holiday cover and equipment, and someone still has to manage and check them. An in-house hire makes sense once bookkeeping volume genuinely fills a role and you have a senior finance person on site to direct it.

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Outsourced Bookkeeping vs In-House Bookkeeper — side by side

Dimension	Outsourced Bookkeeping	In-House Bookkeeper
Annual cost	BlackpeakCFO: from £1,800 a year (£150/month) for sole traders and landlords; from £3,540 a year (£295/month) for a limited company with management accounts	A salary, plus employer National Insurance, workplace pension, holiday cover, software and equipment
Cover for holiday and sickness	Planned around: the work does not depend on one employee being in	None by default: the books stall when one person is away
Continuity if they leave	High: the processes, software and records stay in place	Low: knowledge walks out with the person, and a gap and a rehire follow
Supervision burden	Low: the provider owns quality and method	High: someone capable must direct, review and correct the work
Skill level	Established processes and current software knowledge	As good as the one person hired, and only as current as their training
Scalability	Fee moves up or down as transaction volume changes	Fixed cost; under-used in quiet months, stretched in busy ones
Best fit	Bookkeeping volume below a full role; no senior finance person to supervise	High daily volume that fills a role, with a finance manager or FD on site to direct it

When Outsourced Bookkeeping is the right call

Choose outsourced bookkeeping when the volume of bookkeeping does not justify a salary, which is the case for most small businesses, or when you have no senior finance person available to supervise an in-house hire. Outsourcing turns a fixed payroll cost into a predictable fee, avoids holiday and sickness gaps, and keeps the records to a consistent standard. It also removes the cost most owners underestimate: the hours you or a manager spend directing and checking a junior bookkeeper. The work arrives done, rather than delegated back to you.

When In-House Bookkeeper is the right call

Choose an in-house bookkeeper when bookkeeping volume genuinely fills a role: high daily transaction counts, complex stock, multi-currency, or a busy sales ledger that needs someone in the building every day. An in-house hire also makes sense when you already have a finance manager, financial controller or FD on site who can direct, review and develop them, so the supervision lands on an existing role rather than on the owner. If you need a finance person physically present for ad-hoc tasks beyond bookkeeping, in-house wins on availability.

The honest verdict

For most small businesses, outsourced bookkeeping is the more economical and more resilient choice: lower cost, no holiday or sickness gaps, no rehire risk, and none of the supervision an in-house junior quietly creates. The decision tips toward in-house only when volume fills a real role and a senior finance person is already on site to direct it. BlackpeakCFO provides outsourced bookkeeping from £150/month for sole traders and landlords, and from £295/month for limited companies with management accounts, done to chartered standard by Stuart Wilson, ACMA CGMA, so the work needs no checking from you.

"Owners price an in-house bookkeeper by the salary. The real cost is the salary plus employer costs plus the hours someone senior spends checking the work, and that last part never shows up in the budget."

Stuart Wilson, ACMA CGMA — founder, BlackpeakCFO

Common questions

Is outsourced bookkeeping cheaper than hiring in-house?

For most small businesses, yes. An in-house bookkeeper costs a salary before you add employer National Insurance, workplace pension, holiday cover, equipment and software. BlackpeakCFO's outsourced bookkeeping starts from £150/month for sole traders and landlords and from £295/month for a limited company with management accounts, as a fixed fee with no employment costs on top.

What happens to my books when an in-house bookkeeper is on holiday or off sick?

By default, the work stalls until they return, which is one of the strongest arguments for outsourcing. With an outsourced service the reconciliation, invoicing and month-end are planned around holidays, so they do not depend on one employee being at their desk.

Doesn't an in-house bookkeeper understand my business better?

They build familiarity over time, but a good outsourced provider closes that gap quickly with proper onboarding, and brings something an in-house junior often cannot: experience of how other businesses keep their books and current knowledge of the accounting software. The trade-off is proximity for breadth, and for most small businesses breadth wins.

Who supervises an outsourced bookkeeper?

The provider does. Quality control, method and keeping up with the software are the provider's responsibility, not yours. With an in-house junior, someone capable in your business has to direct and review the work, and that supervision time is a real but hidden cost. With BlackpeakCFO the bookkeeping is done by a chartered management accountant, so there is nothing for you to check.

When does an in-house bookkeeper actually make sense?

When bookkeeping volume genuinely fills a role (high daily transaction counts, complex stock, multi-currency) and you already have a finance manager, financial controller or FD on site to direct and develop them. At that point the supervision is absorbed by an existing role, and having someone present every day has real value. Below that, outsourcing is usually the better economics.

About the firm and this page

Who does the work: Stuart Wilson, ACMA CGMA, personally. No juniors, no offshore team, no call centre. His career, 2002 to now · LinkedIn.
Credential: Chartered management accountant: a member of the Chartered Institute of Management Accountants (CIMA) since 2013, with the ACMA and CGMA designations. Seven years as Group Finance Director for a portfolio of SMEs in London (2017 to 2024).
What is not claimed: Not a registered auditor, so no audit opinions. No client counts, testimonials or results figures are published; the sample reports use labelled demo data. Filing as your HMRC agent is set up per client during onboarding.
Prices: Fixed price and fixed scope, in pounds, excluding VAT, agreed in writing before work starts. Delivered in 1 to 5 days or on a monthly cycle, with an onboarding form, email and recorded walkthroughs instead of meetings.
Relationship: BlackpeakCFO is a sister practice of CompanyStack (companystack.co.uk).
Last checked: 19 October 2026

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