Payroll Outsourcing UK 2026: Best Providers, Costs & What to Expect

Chandraketu Tripathi

Finance Editor, Kaeltripton

Published 4 Apr 2026

Last reviewed 4 May 2026

✓ Fact-checked

By Chandraketu Tripathi | Updated April 2026

Running payroll in-house sounds straightforward until it is not. A single HMRC late-filing penalty starts at £100/month and escalates to £400/month after 12 months. An incorrect auto-enrolment assessment triggers enforcement action from The Pensions Regulator. For businesses where payroll is becoming a monthly compliance risk, outsourcing to a specialist bureau removes the operational burden entirely. This guide compares the best UK payroll outsourcing providers in 2026.

Our Verdict

IRIS is startups.co.uk's top-rated payroll outsourcing provider for UK small businesses. Moorepay is the best for businesses wanting integrated HR advisory alongside payroll. ADP is the leading choice for mid-market businesses (25+ employees). Costs run £4–10 per employee per month for fully managed payroll — significantly more than self-service software (£1–3/emp/month) but removing compliance risk entirely.

Payroll Outsourcing Costs UK 2026

Source: taxaccolega.co.uk, acenteus-cca.com, whichpayroll.com (April 2026). Minimum monthly fees typically apply.
Service Level	Cost Per Employee/Month	What's Included	Best For
Part-managed payroll	£2–3/employee	Processing only — you manage inputs and queries	Businesses with payroll expertise wanting admin support
Fully managed payroll	£4–10/employee	Full processing, RTI, pensions, payslips, compliance	Most UK SMEs — removes compliance burden
Managed + HR support	£8–15/employee	Above + HR helpline, employment law advisory	Businesses needing HR + payroll in one
CIS payroll (add-on)	£1–20/subcontractor/month	HMRC verification, deductions, monthly returns	Construction firms with subcontractors
P11D reporting	£10–50/employee (annual)	Benefit in kind reporting, HMRC submission	Businesses providing taxable employee benefits

Best Payroll Outsourcing Providers UK 2026

Source: whichpayroll.com (March 2026), startups.co.uk (March 2026). All providers are HMRC-recognised for RTI filing.
Provider	Min Employees	Best For	Key Feature
IRIS Payroll Bureau	Any	SMEs, accountant-used, reliable	Top-rated by startups.co.uk, HMRC-recognised
Moorepay	Any	Integrated HR + payroll, Employment Rights Act compliance	Only bureau bundling HR advisory + payroll as standard
PayFit	1+	Modern cloud payroll, tech-forward SMEs	Real-time payroll, employee self-service, Xero/QuickBooks
ADP Managed Payroll	25+	Mid-market, enterprise-grade	ISO 9000 + 27001 certified, global capability
Cintra	50+	Complex payroll, international	Multi-jurisdiction, complex pay structures
Ceridian/Dayforce	100+	Enterprise, real-time payroll	Real-time processing, comprehensive HCM
Dataplan	Any	SMEs, CIPP accredited	CIPP Payroll Assurance Scheme certified
MHR	Mid-large	Sophisticated reporting, analytics	iTrent platform, salary modelling, AI-powered

Outsourcing vs In-House Payroll: True Cost Comparison

Source: acenteus-cca.com, whichpayroll.com, UK salary data 2025.
Factor	In-House (50 employees)	Outsourced (50 employees)
Payroll software	£500–2,000/year	Included in bureau fee
Staff time (payroll admin)	5–10hrs/month @ £20–30/hr = £1,200–3,600/year	Near zero — submit changes only
Payroll manager salary	£32,750–60,000/year (if dedicated)	N/A
HMRC penalty risk	Your responsibility	Provider's PI insurance covers their errors
Bureau fee (50 employees)	N/A	£2,400–6,000/year (£4–10/emp/month)
Compliance updates	Your responsibility to track	Provider handles all HMRC changes

2026 Compliance Updates Your Bureau Must Handle

National Minimum Wage April 2026 — new rates must be applied from the correct pay period
Statutory sick pay: £123.25/week from April 2026
Statutory maternity/paternity/adoption pay: £194.32/week from April 2026
Employment Rights Act 2025 — day-one written payslip requirements enhanced
Employer NIC at 15% — above £5,000/year threshold since April 2025
HMRC enforcement on worker status — IR35 and contractor classification scrutiny increasing

Frequently Asked Questions

How much does payroll outsourcing cost in the UK?

UK payroll outsourcing typically costs £4–10 per employee per month for a fully managed bureau service, or £2–3 for part-managed payroll. Additional costs include CIS subcontractor processing (£1–20 per certificate), P11D reporting, and auto-enrolment management. A small business with 10 employees can expect to pay £50–100/month. Source: taxaccolega.co.uk, acenteus-cca.com (April 2026).

What is the best payroll outsourcing company in the UK?

For SMEs: IRIS (top-rated by startups.co.uk), Moorepay (integrated HR + payroll), and PayFit (modern cloud platform) are consistently highly rated. For mid-large businesses: ADP (25+ employees, enterprise-grade), Cintra (complex payroll), and Ceridian/Dayforce. For businesses under 10 employees, ask your accountant — most offer bureau payroll at competitive rates.

What is the difference between payroll outsourcing and payroll software?

Payroll software is a tool you operate yourself — you run pay runs, file RTI, and take on compliance responsibility. Payroll outsourcing means a third party handles everything — you submit changes and the provider runs payroll, files with HMRC, manages pensions, and issues payslips. Outsourcing is more expensive (£4–10/emp/month vs £1–3/emp/month for software) but removes compliance risk and operational burden.

Is the employer still responsible if the payroll bureau makes a mistake?

Yes — HMRC holds the employer legally responsible for payroll compliance regardless of who processes the payroll. However, reputable payroll bureaux carry professional indemnity insurance covering HMRC penalties arising from their errors. Always check your provider's PI insurance cover and get the error liability terms written into your contract. Source: whichpayroll.com.

When is the best time to switch payroll providers?

The cleanest time to switch payroll provider is at the start of a new tax year (April). However, mid-year switches are manageable with proper planning. Your new provider needs year-to-date payroll data, employee records, and pension scheme details. Allow 4–6 weeks for transition. Source: whichpayroll.com.

Related Articles

Disclaimer: Prices change — verify with providers. Sources: startups.co.uk, whichpayroll.com, taxaccolega.co.uk, acenteus-cca.com, zelt.app, Capterra, ABI, money.co.uk, Simply Business, HMRC. April 2026.