Bookkeeping Outsourcing Costs UK (2025/26): The Complete Guide for SMEs

If three bookkeeping quotes feel impossible to compare, it’s not you. Providers price in different ways (hourly vs fixed vs per-transaction), scopes vary (bank recs only vs full month-end), and the app stack is often a mystery until after you sign. This guide makes it comparable: the pricing models, what’s included (and not), realistic ranges by company size, a 30-staff worked example (clearly labelled monthly and yearly), and a scope/risk table so you can choose with confidence.

Compliance note: VAT-registered businesses must keep records digitally and file via compatible software (Making Tax Digital for VAT). GOV.UK

If you submit VAT returns late, HMRC’s points regime can trigger a £200 penalty once you reach the threshold; late-payment interest is separate and set centrally by HMRC. GOV.UK

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1) The true cost model (what actually drives price)

Pricing methods you’ll see

• Hourly – fine for ad-hoc clean-ups, unpredictable for BAU.
• Fixed monthly – best for steady volumes and clear SLAs; set volume caps.
• Per-transaction – fees set by bank lines/invoices/docs processed; still used in parts of the market.

Software licences (core)

• Xero (UK) – Hubdoc data capture is included with business-edition plans; note some UK bank feeds carry bank-levied charges which Xero passes on. central.xero.com
• Multi-currency – in Xero, Comprehensive and Ultimate include multi-currency; budget the correct tier if you invoice in USD/EUR, etc. central.xero.com
• QuickBooks Online (UK) – receipt capture is a built-in feature; multi-currency is available on Essentials and Plus (not Simple Start). quickbooks.intuit.com

App stack (typical add-ons)

• Dext Prepare – partner pricing scales by per-client bundles. dext.com
• AutoEntry – credit-based pricing; credits vary by document type (e.g., invoices 1 credit; line-item invoices 2; bank statements 3 credits/page). autoentry.com

Other cost drivers to confirm up-front

• Multi-currency / multi-entity (revaluations, intercompany, extra reconciliations). central.xero.com
• CIS (if relevant): Xero confirms CIS returns remain an add-on across plans. Xero Blog
• Disbursements (chargeable bank feeds). Xero
• VAT prep & submit under MTD (scope and deadlines). GOV.UK
• Management pack (P&L, balance sheet, cash summary, KPI/WIP, aged lists, commentary).
• Year-end journals (who posts them; who owns the workings).
• Onboarding/clean-up (historic backlog; data quality remediation).

Related guides: Build your bookkeeping around a 52-week rolling forecast so VAT/PAYE and big supplier runs are visible before they bite, see Cashflow forecasting services.

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2) Costs by size – honest ranges to baseline

These are realistic bookkeeping service ranges for service-based SMEs (typical app stack + VAT noted separately). Your exact fee depends on process hygiene, integrations/approvals, and how quickly you close month-end.

Volume bands (typical per month)

Size	Bank lines	Sales invoices	Bills/receipts	Notes
5 staff	120–220	50–90	80–150	One main bank; light card use
10 staff	220–450	90–170	150–280	More cards/expenses; projects
25 staff	500–900	250–450	400–800	Multiple cards; app rules
50 staff	1,000–1,800	600–1,000	1,000–1,600	Multi-dept; approvals; WIP

Typical monthly bookkeeping fee ranges (ex-VAT)

Size	Steady-state bookkeeping	Common add-ons (ex-VAT)
5 staff	£300–£700 per month	VAT return £75–£200/return; app stack £15–£60/m
10 staff	£600–£1,100 per month	VAT return £100–£250/return; app stack £30–£100/m
25 staff	£1,100–£2,000 per month	VAT return £150–£300/return; app stack £60–£180/m; multi-currency uplift if needed
50 staff	£2,000–£3,800+ per month	VAT return £200–£400/return; app stack £120–£300/m; multi-entity/multi-currency uplift

Software note: Plan features/prices change. Xero’s UK pricing confirms some bank feeds are chargeable; QuickBooks UK shows built-in receipt capture and tier-specific features. Check current pages before budgeting. Xero

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3) Worked scenario – 30-staff service SME (UK, VAT-registered)

Profile (monthly volumes)

• Banking: 2 current accounts + 1 card provider → ~800 bank lines
• Sales: ~380 invoices (projects + retainers)
• Purchases/expenses: ~650 bills/receipts + mileage/expense claims
• Complexity: multi-currency customer invoices (USD/EUR), contractor costs (no CIS), light deferred income
• Deadlines: MTD VAT quarterly; management pack by WD7 (workday 7) i.e., a reliable close schedule, not quarter-end tidy-ups

Scope we’d expect

• Weekly posting; bank feeds; weekly reconciliations; AR/AP; expenses capture; month-end journals (deferred income, prepayments, accruals); aged lists + commentary; MTD VAT prep & submit; quarter-end review against your 52-week forecast (internal).

Suggested stack

• Xero with multi-currency (ensure Comprehensive/Ultimate if you need it) + Hubdoc; note chargeable bank feeds where applicable. central.xero.com
• Dext or AutoEntry for capture (bundle/credit model — agree the allowance up front). dext.com

Indicative budget (ex-VAT) monthly vs yearly clearly shown

• Bookkeeping (monthly): £1,400–£2,200 per month → £16,800–£26,400 per year
• App stack (monthly): £80–£180 per month → £960–£2,160 per year (bundle/credit-based; confirm vendor rates) dext.com
• VAT returns (quarterly): £200–£300 per return → £800–£1,200 per year
• If onboarding/clean-up is needed (one-off): priced by months of backlog + data quality.
• Estimated monthly cost £1540-£2480

Why link to your 52-week forecast each month? It keeps VAT/PAYE and supplier lumps visible before they hit, reducing the chance of late submissions under HMRC’s points regime and smoothing cash. GOV.UK
Related reads: If payroll timing is driving cash swings, see Payroll outsourcing costs UK and DIY vs outsourced payroll.

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4) Scope & risk, in-house vs software-only vs outsourced

Model	What’s included	Effort on your team	Main risks	When it “wins”
In-house (hire)	Full control; immediate tweaks; internal knowledge	High (recruit, manage, cover leave)	Key-person risk; scaling; under-used tooling	Stable, high volume, with finance leadership
Software-only	Ledger + capture; you do posting/recs	High (posting, chasing, month-end)	Slipping reconciliations; late VAT under points regime (penalties/interest) if compliance drifts GOV.UK	Very small/simple flows
Outsourced bookkeeping	Posting, reconciliations, MTD VAT prep & submit, WD7 management pack with commentary	Low–Medium (approvals, queries, uploads)	Scope creep if volumes spike; unclear clean-up scope	10–50 staff SMEs needing a dependable close schedule

Spin-off explainer: Bookkeeper vs accountant vs finance manager, who does what, when to set roles/controls and your finance timetable.

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5) Red flags that increase cost (or hide it)

• Quarter-end tidy-ups only (no monthly close) → backlogs and higher risk under VAT penalty points. GOV.UK
• No management pack – no accruals, prepayments, WIP, aged lists or commentary.
• No 52-week forecast alignment – VAT/PAYE and supplier lumps surprise you; cash stress rises.
• Data quality – duplicate feeds, stale bank rules, unapproved expenses = rework.
• Unclear app costs – Dext is bundle-based; AutoEntry is credit-based (vary by doc type). dext.com
• Multi-currency assumed but not licensed – Xero multi-currency requires Comprehensive/Ultimate; QBO multi-currency requires Essentials/Plus. central.xero.com

For deeper dive read: Hidden bookkeeping fees UK (what providers rarely include) and Monthly vs quarterly bookkeeping – cashflow and risk trade-offs (internal).

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6) “Cost by situation” reusable visual

Situation	What’s included	Where it fits	Indicative pricing (ex-VAT)
Compliance-only	Monthly bank recs, VAT prep/submit, basic reports	Low-complexity, ≤10 staff	£400–£900 per month
Clean-up project	Historic posting, corrections, re-reconcile, app rules, month-end reset	Backlogs, pre-funding, provider change	£1,500–£6,000+ one-off (scope-based)
Fully-managed finance	Weekly posting, WD7 pack, VAT, AR/AP workflows, query handling, forecast check-ins	15–50 staff; board reporting timetable	£1,200–£3,800+ per month

For more information: How much does catch-up/clean-up bookkeeping cost? (worked examples) we break down typical backlog patterns (internal).

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FAQs (plain English)

1) How are clean-up fees calculated?
By scope: months of backlog, number of bank accounts/cards, data quality (duplicates, missing docs), and whether multi-currency is involved. Providers may price hourly or as a fixed project.

2) Do most providers have minimum terms?
Commonly 3–12 months for fixed pricing; monthly rolling exists but may carry setup fees. Get term, notice, and price-review points in writing.

3) Who owns year-end journals?
You should. Ensure the engagement says journals and workings are your property and will be shared with your year-end accountant on request.

4) Will I lose my data if I switch?
Export before you move. Xero confirms cancelled-org data is archived for around 7 years; QuickBooks Online provides 1 year read-only after cancellation. Keep local exports to meet record-keeping duties. central.xero.com

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Related guides (next steps)

• Build confidence in cash: Cashflow forecasting services (internal).
• Self-serve clarity: 52-week rolling forecast (internal).
• People costs and timing: Payroll outsourcing costs UK & DIY vs outsourced payroll (internal).
• System design: Best bookkeeping setup for SMEs (roles, controls, calendar) 2025/26 edition (internal).

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What to do next

Download the DIY Bookkeeping Checklist (UK 2025/26) to tighten processes straight away.
Ready to price your specific setup? Book a 20-minute planning call and we’ll map scope, volumes, and a reliable business day 7 close schedule.