UK · Decision guide · Bookkeeping

Hiring a Bookkeeper vs DIY Bookkeeping

The short answer

DIY bookkeeping genuinely works for very small, very simple businesses: a sole trader with a handful of transactions, no VAT and no payroll can reasonably do their own books. It stops working quickly once VAT registration, payroll, Making Tax Digital or real transaction volume arrive, because the time and the risk of errors outweigh the saving. For most businesses past the simplest stage, hiring a bookkeeper is the better economic choice, as it costs less than the hours it takes you.

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Hiring a Bookkeeper vs DIY Bookkeeping — side by side

Dimension	Hiring a Bookkeeper	DIY Bookkeeping
Direct cost	BlackpeakCFO: from £150/month for sole traders and landlords; from £295/month for a limited company with management accounts	Software subscription only, but your own time is the real cost
Time cost to you	Minimal: a few minutes a month forwarding documents	Several hours a month, rising sharply with volume and complexity
Error risk	Low: done by someone who does it every day	Higher: mistakes in VAT, categorisation and reconciliation are common
VAT, payroll and MTD	Handled correctly and on time	Manageable when simple; quickly onerous and error-prone as it grows
Year-end cost	Lower: clean books mean a faster, cheaper year-end	Often higher: the books need fixing before anything can be filed
Owner focus	Owner's time stays on running and growing the business	Owner's time goes on data entry instead of the business
Best fit	Any VAT registration, payroll, MTD obligation, or growing volume	Very small, very simple sole traders: few transactions, no VAT, no payroll

When Hiring a Bookkeeper is the right call

Hire a bookkeeper once your situation crosses one of a few clear lines: you register for VAT, you run payroll, Making Tax Digital applies to you, or transaction volume grows enough that the books take real time each month. At that point DIY stops saving money, because the hours you spend and the cost of fixing errors at year-end exceed a fixed monthly fee. A bookkeeper also reads the numbers as well as recording them, so problems show up early. For most businesses past the simplest stage, this is the better economics.

When DIY Bookkeeping is the right call

DIY bookkeeping genuinely works, and is the sensible choice, for a very small, very simple business: a sole trader with a low volume of transactions, no VAT registration, no payroll and no MTD obligation yet. At that scale, accounting software makes the work manageable in a short monthly session, and paying for a bookkeeper would be spending money to save very little time. Doing your own books early also builds a useful feel for your numbers. The key is to be honest about when you have outgrown it, and not to drift past that point.

The honest verdict

DIY bookkeeping is not a mistake. For the simplest sole traders it is the right call, and there is no shame in keeping your own books while the business is tiny. The mistake is staying DIY too long: carrying on once VAT, payroll, MTD or volume have arrived, when the unpaid hours and the year-end clean-up cost more than a bookkeeper would. Watch for those triggers and hand it over when you hit them. BlackpeakCFO provides bookkeeping from £150/month for sole traders and landlords, done to chartered standard. If the books have already fallen behind, a three-month catch-up is £495.

"DIY books are fine when the business is tiny. Keep them yourself and learn your numbers. Just be honest about the day you outgrow it, because the cost of doing your own books is the hours you didn't spend selling."

Stuart Wilson, ACMA CGMA — founder, BlackpeakCFO

Common questions

Can I really do my own bookkeeping?

Yes, if the business is genuinely small and simple. A sole trader with a low volume of transactions, no VAT, no payroll and no Making Tax Digital obligation can reasonably keep their own books in accounting software, in a short monthly session. DIY stops being sensible when complexity or volume arrives. It works at the smallest scale and breaks down quickly above it.

When should I stop doing my own bookkeeping?

Hand it over when you hit any of these triggers: VAT registration, running payroll, a Making Tax Digital obligation, or transaction volume that takes real time each month. Each of these sharply increases the time and the error risk of DIY. Past any one of them, a fixed monthly fee usually costs less than the hours, and the year-end clean-up, that DIY now demands.

Is hiring a bookkeeper worth the money?

For most businesses past the simplest stage, yes, because the real comparison is the fee against the value of your own time plus the cost of fixing errors at year-end. Bookkeeping from £150/month for sole traders and landlords usually costs less than the hours it frees, and clean books make the year-end cheaper too.

Won't DIY bookkeeping save me money?

Only while the business is very small. The software subscription is a real saving over a bookkeeper's fee, but once VAT, payroll or volume arrive, the unpaid hours you spend and the higher year-end bill from messy books usually outweigh it. DIY saves money at the smallest scale and costs money above it.

Does DIY bookkeeping make my accountant's job harder?

It can. If your DIY books contain errors (miscategorised transactions, VAT mistakes, unreconciled accounts), they have to be found and fixed before anything can be filed, and that time lands on your bill. DIY done carefully and kept current is fine. DIY done in a rush is often a false economy that moves the cost to year-end.

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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