- Outsourced payroll services in the UK typically cost between £4 and £10 per employee per month, though pricing varies by provider, headcount, and service model.
- Fully managed payroll and payroll bureau services are fundamentally different models, and choosing the wrong one for your business size can create more work, not less.
- Payroll outsourcing is most cost-effective when the provider bundles it with accounting, tax, and compliance services under one fixed monthly fee.
Outsourced payroll services in the UK typically cost between £4 and £10 per employee per month, depending on your headcount and the level of service you need. For most small businesses, handing payroll to a specialist means fewer errors, no missed HMRC deadlines, and hours back every month.
Sleek’s payroll management service bundles payroll with accounting and compliance under one fixed monthly fee, so nothing falls through the cracks.
Choosing the right provider is where most businesses get stuck. This guide covers what outsourced payroll actually includes, how much it costs, and what to look for before you sign up.
What is payroll outsourcing?
Payroll outsourcing means hiring an external specialist to manage everything involved in paying your employees correctly and on time. That includes calculating salaries, deducting income tax and National Insurance, submitting Real Time Information to HMRC, and issuing payslips. Rather than managing this in-house, you hand the process to a provider who takes on the compliance responsibility.
It is not just a time-saving measure. Employment tax rules change regularly, and falling behind carries real consequences. Getting HMRC fines and Companies House penalties for late or incorrect submissions is easier than most small business owners expect.
What does outsourced payroll actually include?
The scope varies by provider, but a full outsourced payroll service typically covers:
- PAYE calculations and income tax deductions
- National Insurance contributions for employees and employers
- RTI submissions to HMRC each pay period
- Payslip generation and distribution
- P45s, P60s, and other statutory documents
- Auto-enrolment administration for workplace pensions
- Statutory pay calculations including sick pay and maternity pay
- Year-end payroll reporting and P11D submissions
Some providers also handle expenses and benefits reporting. If your business offers company cars or private medical cover, ask specifically whether P11D submission is included or charged as an extra.
Fully managed payroll vs payroll bureau: what is the difference?
These are the two main service models, and they suit very different businesses.
Feature | Fully managed | Payroll bureau |
Who handles data entry | Provider | You |
Your involvement | Minimal | Moderate |
Payroll expertise needed in-house | No | Some |
Best for | Businesses with no HR function | Businesses with an internal HR or finance team |
Typical cost | Higher | Lower |
A fully managed service is the cleaner option for small businesses that want payroll entirely off their plate. A bureau model works better when you have internal resource and want to retain some control over day-to-day data.
How much does payroll outsourcing cost in the UK?
Payroll outsourcing in the UK typically costs between £4 and £10 per employee per month for a standard managed service. Pricing varies depending on headcount, pay frequency, and what is included in the base fee.
Pricing model | Typical range | Best for |
Per employee per month | £4 to £10 | Small to mid-sized businesses |
Per payslip | £1.50 to £5 | Irregular or seasonal payroll |
Fixed monthly fee | £20 to £150+ | Businesses with predictable headcount |
Bundled with accounting | Varies | Businesses wanting one provider |
Several factors push costs higher: weekly rather than monthly pay runs, high employee turnover, complex commission structures, and providers who charge separately for year-end filing or auto-enrolment.
Sleek’s Pro package includes payroll for up to five members of staff as standard, with additional employees charged at £5 each per month. Because payroll sits alongside bookkeeping, year-end accounts, corporation tax, VAT returns, and self-assessment in one package, there are no surprise add-on fees. You can see the full breakdown on the Sleek pricing page.
Always ask a provider whether auto-enrolment administration is included or billed separately. It is one of the most commonly overlooked costs when comparing payroll quotes.
What are the benefits of outsourcing payroll?
For most small businesses, the case for outsourcing payroll comes down to three things: compliance, accuracy, and time.
Compliance: HMRC rules around PAYE, RTI, and auto-enrolment change regularly. A specialist provider tracks these changes as part of their service, reducing your exposure to penalties and late filing charges.
Accuracy: Payroll errors are costly and damaging to employee trust. Reputable providers operate with high accuracy rates and carry professional indemnity insurance if something does go wrong.
Time: Running payroll in-house, even for a small team, absorbs hours every month. That time compounds quickly as your headcount grows. Understanding the true cost of employing someone in the UK makes the case for outsourcing even clearer.
Additional benefits include:
- No need to invest in dedicated payroll software or staff training
- Scalable as your headcount grows without changing providers
- Access to specialists who understand complex pay scenarios
- Reduced risk of HMRC penalties from late or incorrect submissions
- Simplified employer obligations around auto-enrolment and statutory pay
What are the risks of outsourcing payroll?
Outsourcing payroll removes admin burden, but it does not remove your legal responsibility as an employer. There are real risks worth understanding before you commit:
- Data security: Payroll data is sensitive. Check that any provider is GDPR compliant and can demonstrate how employee data is stored and transmitted securely.
- Loss of visibility: With a fully managed service, it is easy to lose day-to-day familiarity with your own payroll. Build in a regular review so you stay across the numbers.
- Hidden costs: Some providers quote a low headline rate and charge separately for additional pay runs, year-end filing, or auto-enrolment. Always request a full breakdown before signing.
- Provider reliability: If your provider makes an error or misses a deadline, the fine lands with you. Check reviews, accreditation, and what their error resolution process looks like.
- Over-dependence: Switching providers later is possible but takes planning. Knowing how to change accountants or payroll providers without disruption is worth understanding before you are in the middle of it.
How to choose a payroll outsourcing provider in the UK
Selecting the right provider is worth taking seriously. A poor fit creates more admin, not less. Work through these steps before making a decision:
- Define your scope. Know your headcount, pay frequency, and whether you need extras like auto-enrolment or expenses processing before approaching any provider.
- Check software compatibility. If you use Xero or another accounting platform, confirm the provider integrates with it. Sleek’s Xero accounting guide explains how payroll and bookkeeping connect in practice and what to look for in a joined-up system.
- Verify accreditation. Look for providers accredited by the Chartered Institute of Payroll Professionals. This is the recognised UK standard and a reliable baseline for quality.
- Understand the support model. Will you have a dedicated contact or join a ticket queue? For payroll, direct access to a named person matters when something needs resolving quickly.
- Request a full fee breakdown. Ask specifically about year-end reporting, auto-enrolment, additional pay runs, and what happens if your headcount changes mid-year.
- Check data security standards. The provider will handle sensitive employee data. Confirm their GDPR compliance, data storage policies, and breach notification process.
- Read independent reviews. Look specifically for comments about accuracy, response times, and how errors were handled. A provider’s sales page will not tell you what you need to know.
Is payroll outsourcing right for your business?
Payroll outsourcing suits most small and growing businesses, but it is not the right fit in every situation.
Good fit if | Not the right fit if |
You have no dedicated HR or finance function | You have an experienced in-house payroll team |
Payroll is consuming significant time each month | Your payroll is simple, static, and rarely changes |
You have missed or nearly missed HMRC deadlines | You prefer full direct control over all processes |
You are growing and expect headcount to change | Budget does not stretch to any outsourcing spend |
You want payroll bundled with accounting and tax | You only need software, not a managed service |
For businesses that also need bookkeeping, year-end accounts, and tax filing, bundling payroll with a full accounting service is usually the most cost-effective route. If you are also weighing up the broader cost of taking on staff, the employment allowance guide for employers is worth reading before making any commitment.
How Sleek helps with payroll outsourcing
Sleek’s Pro package includes payroll for up to five employees as standard, with straightforward per-employee pricing beyond that. It sits alongside monthly bookkeeping, year-end accounts, corporation tax, VAT returns, self-assessment, and a dedicated UK-based contact, all under one fixed monthly fee.
There are no hidden charges, no surprises at year-end, and a 30-day money-back guarantee if it is not the right fit. For businesses that want payroll handled properly without juggling multiple providers, it is a practical and cost-effective solution.
Disclaimer: The preceding information is not legal advice. This content is aimed to provide general guidance. For more formal or legal advice, contact Sleek directly.
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FAQs on payroll outsourcing UK
Is outsourcing payroll legal in the UK?
Yes. Outsourcing payroll is entirely legal in the UK and widely practised across businesses of all sizes. You remain legally responsible as the employer for ensuring PAYE and National Insurance are calculated and submitted correctly to HMRC. Your provider acts on your behalf, but the obligation stays with you. Always ensure your provider is accredited and that a formal data processing agreement is in place to cover GDPR requirements.
Can payroll providers handle pensions and auto-enrolment in the UK?
Most full-service payroll providers include auto-enrolment administration as part of their offering, though it is not always included in the base price. This covers calculating pension contributions, enrolling eligible employees, and submitting data to your pension scheme. Always confirm whether auto-enrolment is bundled or charged separately before signing up, as it is one of the most frequently overlooked costs when comparing payroll outsourcing quotes.
How long does it take to switch payroll providers in the UK?
Switching typically takes four to six weeks when managed carefully. The cleanest time to switch is at the start of the new tax year in April, though mid-year switches are possible with the right preparation. Your new provider will need year-to-date payroll figures, employee records, and your HMRC registration details. Understanding how to change accountants or payroll providers without disrupting your pay runs is worth reading before you begin.
Can accountants offer payroll outsourcing in the UK?
Yes, and for most small businesses it is the most practical option. Bundling payroll with your accounting service means one provider handles PAYE, RTI submissions, year-end accounts, corporation tax, and VAT returns under a single fixed fee. It removes the risk of your accountant and payroll provider working from different data, which is one of the most common causes of filing errors for small businesses.
What are HMRC’s requirements for outsourced payroll in the UK?
HMRC requires that PAYE, National Insurance, and RTI submissions are made accurately and on time regardless of whether you manage payroll in-house or through a provider. Your provider must be registered with HMRC as a payroll agent to act on your behalf. As the employer, you remain responsible for any errors or missed deadlines.
Late or incorrect submissions can result in financial penalties, as covered in this guide to HMRC and Companies House fines.
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Is payroll outsourcing suitable for small businesses and SMEs in the UK?
Payroll outsourcing is particularly well suited to small businesses and SMEs that lack a dedicated HR or finance function. The cost of outsourcing is often lower than the combined expense of payroll software, staff training, and the time spent running payroll internally each month. For businesses with fewer than twenty employees, a bundled accounting and payroll package typically offers the best value and simplifies compliance across the board.
What software do UK payroll providers typically use?
Most UK payroll providers use dedicated payroll platforms that integrate with leading accounting software such as Xero and QuickBooks. Integration matters because it eliminates manual data transfer between systems, reducing the risk of errors. Sleek operates on Xero, which connects payroll, bookkeeping, and reporting in one place. If you are unfamiliar with how Xero works in practice, this Xero accounting guide covers the essentials.
