Payroll API built for the UK
Run compliant payroll for your clients. HMRC-recognised, developer-first.
- Handles Complex Rules & Variable Pay
- Flexible Pay-Per-Payslip Pricing
- Powerful API, easy to integrate to your ERP
Trusted by UK businesses and accountancy firms
Platform
One platform. Four powerful tools.
From a single payslip to a full API integration, choose the tool that fits your workflow.
Payroll Software
Our flagship automated payroll solution. Handles complex variable hours, 52-week averages, pension auto-enrolment, and real-time RTI submissions to HMRC.
Learn morePayruns
Monthly schedule · 2026/27
| # | Payment date | Total | Status |
|---|---|---|---|
| 1 | 30 Apr 2026 | £68,614.00 | Closed |
| 2 | 31 May 2026 | £68,614.00 | Closed |
| 3 | 30 Jun 2026 | £68,614.00 | Closed |
| 4 | 31 Jul 2026 | £71,250.00 | Open |
| 5 | 31 Aug 2026 | £71,250.00 | Not started |
| 6 | 30 Sep 2026 | £71,250.00 | Not started |
| 7 | 31 Oct 2026 | £71,250.00 | Not started |
| 8 | 30 Nov 2026 | £71,250.00 | Not started |
Instant Payslip Generator
Create HMRC-compliant payslips in seconds. No account setup, just input data, calculate, and download.
Learn morePayslip
Joanne Bailey · Period 10 · Jan 2027
Earnings
Deductions
The Accountant Hub
Manage multiple clients from a single dashboard. Invite employers to input data, no login required.
Learn moreEmployees
Barnes and Sons · Active
| Name | Role | Type |
|---|---|---|
| Pharmacist | Permanent | |
| Chief Executive | Director | |
| Media Buyer | Permanent | |
| Equities Trader | Casual | |
| HR Manager | Permanent | |
| Sales Executive | Permanent | |
| Content Lead | Casual |
API Infrastructure
A developer-first REST API exposing our full payroll and compliance engine. Integrate into any ERP or HR platform.
Learn moreWho it's for
Built for every
payroll use case.
Whether you're invoicing your first client or running a hundred-employee payroll, Moonworkers adapts to how you work, not the other way round.
Sole Traders
Your first payslip in minutes, no accountant needed.
- Instant payslips, no sign-up required
- Pay-as-you-go, zero subscriptions
- 100% HMRC-compliant PDFs
Growing Businesses
From 2 to 200 employees, payroll that scales with you.
- Automated Tax, NI & Pension deductions
- Handles variable hours & holiday pay
- Syncs with Sage, Xero, QuickBooks & Nest
Accountants
Manage all your clients from one unified dashboard.
- Unified multi-client dashboard
- Client data entry without login required
- Bulk processing & flexible pay codes
Enterprises
Build payroll into your product with our robust REST API.
- Robust, independent REST API
- Custom ERP & HR integrations
- White-label capabilities available
£2M+
Payroll processed
500+
Employers managed
99.9%
API uptime
<200ms
Average response time
Features
The complete UK payroll engine.
From RTI submissions to payslip generation, every piece of UK payroll compliance handled automatically.
Real Time Information
Every pay run automatically triggers an RTI submission to HMRC. Full Payment Submissions and Employer Payment Summaries filed on time, every time, zero manual steps.
- FPS submitted on every pay run
- EPS submitted for nil periods & reclaims
- NI verification & starter declarations
- P60 & P45 generated automatically
Payslip generation
Beautiful, HMRC-compliant payslips generated as PDF and delivered automatically to employees.
Payslip
Joanne Bailey · Period 10 · Jan 2027
Flexible Pay Codes
Create unlimited earnings and deduction codes, bonuses, commissions, overtime, benefits-in-kind, and more.
Pension Auto-Enrolment
Automatic enrolment assessment on every pay run. Integrates with Nest, PEOPLES, Smart Pension & more.
Smart Holiday Pay
Calculates statutory and contractual holiday entitlement for all worker types, including casual and zero-hours.
Integrated Timesheets
Import hours directly from your workforce management tools. Variable and shift-based pay calculated in seconds.
Universal Worker Support
Full support for employees, directors, casual workers, and zero-hours contracts, each with their own tax and NI treatment.
Integrations
Fits into your existing stack
Moonworkers connects with the tools you already rely on — accounting software, pension providers, banking and workforce management — keeping data consistent across your payroll ecosystem.
See exactly how it works
Explore the full payroll workflow: employees, payslips, RTI submissions, CIS, auto-enrolment and HMRC payments. No sign-up needed.
Loading demo…
Pricing
Fair, flexible pricing.
No hidden fees.
Pay only for what you use, no base fee, no setup cost. Pricing adjusts automatically as your usage grows.
Monthly Payroll · Employer
Payroll that scales
with your team.
Pay per payslip with volume pricing that scales with your team. A minimum fee applies on smaller plans — no setup cost, no lock-in, cancel anytime.
- Full PAYE, NI & pension auto-enrolment
- Automated RTI (FPS & EPS) to HMRC
- Variable hours & 52-week holiday pay
- NEST, Smart & People's Pension integration
- Accounting software integrations
- Payslip generation & delivery
Our customers say it best.
From sole traders to growing enterprises, teams across the UK rely on Moonworkers to run payroll without the headache.
JC Puget
Maison Puget
“The best payroll company for my business. Highly recommend.”
S Djakiodine
Euroaccounting
“We have been using Moonworkers for quite some time and compared to other software in the market, we found it very simple to use and excellent. Moreover, the customer service is great.”
Shenaz Gaffar
Printberry
“Moonworkers has absolutely been a lifesaver for me and my business. Moonworkers customer service is 100% there always there to help. They constantly taking on feedback to make it better. If you are looking to make life easier, then this is it !!!”
Joe Barber
The Barn
“Fantastic onboarding process from the team. A really user friendly website and system. When I have asked for any assistance or help, the team have helped, made changes and even updated the system for my requests!”
James Berry
CJLS Tech
“From the outset the onboarding to Moonworkers was 100% smooth, even any hints of a problem were speedily fixed and we have been running smoothly since then, we have never needed to reach out to support post onboarding, and that's a testament to its own.”
Suzy Kerton
Zyla Accountant
“Moonworkers software is great for HR, payroll, benefits & more and it is amazing to have it all in one platform. The automation saves so much time every month and the team offer great customer support whenever you have a query. Highly recommend!”
Amrit Gill
Hayachi
“Incredibly powerful HR and Payroll platform, we've previously been held back by our accountant on having a truly flexible workforce but no more! With Moonworkers we can hire the skills that we need with exceptional efficiency and the HR platform makes it a well-rounded tool.”
Row Laurence
Braid
“The Moonworkers platform has been a massive help getting me set up with my first few employees and making sure I had all the right boxes ticked – the team have also been super helpful and responsive any time I had questions or there was something I didn't understand.”
Get started today
HMRC-compliant payroll,
built for every use case.
From your first payslip to a full API integration, Moonworkers handles the compliance, the RTI submissions, and the calculations, so you can focus on your work.
From the blog
Payroll insights & guides
P11D changes: what employers need to know
The main P11D changes for UK employers: online-only filing, the 15% Class 1A rate, and mandatory payrolling of benefits from 6 April 2027 explained.
How a P11D affects an employee's tax code
How a P11D changes an employee's tax code, why benefits reduce the tax-free allowance, when a K code appears and how payrolling removes the adjustment.
Payrolling benefits in kind: the full guide
How payrolling benefits in kind works, why HMRC is making it mandatory from 6 April 2027, and what employers must do to tax company benefits through payroll.