Outsourced Bookkeeping for UK Small Businesses: A 2026 Guide

Hiring an in-house bookkeeper isn't the only option — and for most UK small businesses, it isn't even the right one.

What "outsourced bookkeeping" actually means

Outsourced bookkeeping is when an external firm handles the day-to-day finance admin of your business — bank reconciliation, invoice processing, expense management, VAT returns, payroll and management accounts — for a fixed monthly fee. You don't hire an employee; you don't manage holidays or sickness; you just get clean books delivered every week.

Who outsourced bookkeeping is right for

UK small and medium businesses turning over between £100k and £5m. Limited companies, sole traders, VAT-registered businesses, agencies, e-commerce, trades, hospitality and retail.

What's included

Bank reconciliation, sales and purchase invoice processing, expense capture, coding in Xero or QuickBooks, monthly management accounts, VAT returns and year-end records ready for your accountant.

How much does outsourced bookkeeping cost in the UK?

Most UK small businesses pay between £150 and £600 per month for outsourced bookkeeping on a fixed-fee basis. We've published a full UK bookkeeping pricing guide with the breakdown.

Outsourced vs in-house bookkeeper

Hiring a junior bookkeeper in-house typically costs £35k–£48k all-in once you factor NI, pension, holiday cover and software. Outsourced bookkeeping for the same workload usually sits at £4k–£8k per year — with team cover and broader expertise.

How outsourced bookkeeping works in practice

You sign an engagement letter, your bookkeeper takes over, and within 2 weeks you're live. Bank feeds connect, Dext is set up for receipts, your Xero or QuickBooks file is migrated or set up, and the weekly cycle begins.

What to look for in an outsourced bookkeeper

Fixed monthly fees, cloud accounting specialism, weekly bookkeeping as standard, professional memberships (ICB/AAT), clear scope and a proper team rather than a single freelancer.