Stress-Free Payroll for Small UK Businesses
Take payroll off your plate – permanently. No more late pay runs, no more paperwork panic. Just smooth, HMRC-compliant payroll—done for you.
Full Payroll Management
We take care of everything: RTI submissions, auto-enrolment, leavers/starters, and end-of-year filings – always accurate, always on time.
On-Demand Support
Need to make a change or ask a quick question? Text us. Call us. Email us. All included in your monthly fee, with a 48-hour response guarantee.
Tailored to Your Business
No bloated systems or confusing tech – just straightforward payroll using tools like BrightPay and Modulr that you actually interact with.
What You Get with Simplex Payroll
✅ BrightPay-powered payroll runs with employee self access
✅ Pension scheme setup & auto-enrolment handled
✅ Holiday pay, sick pay, maternity/paternity leave managed
✅ Secure employee payslips delivered digitally
✅ Real-time reporting to HMRC
✅ Annual P60s & P11Ds included
Opening hours: 9am – 6pm | Replies within 48 hours
Trusted by UK Businesses Nationwide
We’re proud to be the 2022 Xero Sole Practitioner of the Year and South East Young Entrepreneur of the Year – but even prouder of our client results.
“I wouldn’t trust anyone else now.”
Hanah, Small Business Owner
“Lucy is absolutely amazing and communicates everything clearly. I don’t understand accountancy terms, but she explains it all in a way that makes sense. I just upload my invoices and expenses — Lucy handles the rest. Numbers used to stress me out, but outsourcing to Simplex was the best decision I’ve made for my business.”
“They got HMRC to drop a £1,200 penalty.”
Rachel, LLP Partner
“I reached out in a panic with overdue accounts and a hefty fine from HMRC. Lucy jumped straight in, filed everything quickly, and managed to get the penalty removed — plus a refund. She’s been wonderful to work with and I’m so glad I found her.”
“We couldn’t ask
for more.”
Neil, Construction Business Owner
I cannot recommend Simplex enough. Lucy has been so helpful, and got me sorted when my accounts were in such a mess! She explained everything to me, and has just made the entire process so easy. As a small business owner, having someone like Lucy helping me is exactly what you need!
Simple Payroll Services for Small Businesses
Payroll doesn’t have to be stressful.
Simplex takes it off your hands — fully managed, fully compliant, and built for small teams. Whether it’s your first employee or your tenth, we handle it all so you don’t have to.
Smart Tools, Simple Setup
At Simplex, we use practical, intuitive tools to run your payroll smoothly. You won’t need to figure anything out on your own — we’ll recommend the right apps, get you set up, and support you every step of the way.
Xero
Keep all your accounting in one place. Xero tracks income, expenses, payroll, and cash flow in real time, all synced with your bank.
Brightpay
BrightPay manages payslips, pensions, and HMRC, while staff can view their own info anytime – no hassle.
modulr
Pay staff quickly and safely. Modulr lets you send payments without logging into your bank – saving time every payday.
Getting Started is Easy!
We’ve made it simple for you to get the help you need:
Book a free
consultation
Let’s talk about your business and how we can help.
Share Your
Info
You can securely share your financial information with us online.
We Handle
the Rest
We’ll take care of your bookkeeping and accounting, so you don’t have to worry.
Enjoy Peace
of Mind
Get regular updates and helpful advice, so you always know where your business stands.
Book your free discovery call! It will only take a minute
Switching Accountants is Easier Than You Think
Not getting the support you need? Or just feel like it’s time for a change?
Switching to Simplex is surprisingly easy. We’ll handle everything behind the scenes — no awkward emails, no chasing paperwork, and nothing left to chance. You stay focused on your business, and we’ll take care of the switch.
Here’s how we make it simple:
Seamless Transfer
We’ll contact your previous accountant, gather what we need, and securely transfer your financial records — no hassle for you.
No Disruption to Your Business
There’s no downtime. We’ll keep your accounts running smoothly and ensure everything stays up to date while we handle the changeover.
A Fresh Start
Once you’re settled in, we’ll review your numbers, identify any gaps, and create a plan that supports your goals — now and in the future.
Ready to switch?
Get in touch today and let’s make it happen!
Accountancy Blog Posts
Your Questions, Answered
We know you might have some questions, and we’re here to make everything as clear and straightforward as possible. If you need more information, don’t hesitate to reach out—we’re always happy to help!
If you’re looking for low cost and simplicity, HMRC’s Basic PAYE Tools is free for very small teams. But most small businesses prefer an affordable, done-for-you payroll service. At Simplex, we offer fixed-fee payroll from just £25/month—easy, reliable, and fully compliant.
The best way is one that’s stress-free and accurate. Outsourcing to an accountant like Simplex means your team gets paid correctly and on time, and you stay on top of HMRC rules without lifting a finger.
Payroll services typically cost between £25–£75/month depending on the size of your team and what’s included. Simplex keeps it simple with clear, flat fees and no hidden extras—ideal for UK small businesses wanting reliable support.
Yes—HMRC provides Basic PAYE Tools for free if you’ve got fewer than 10 employees. But you’ll still need to handle payslips, pension reporting, and HMRC submissions. That’s where Simplex can save you time and avoid costly mistakes.
Yes, HMRC’s Basic PAYE Tools is free, but limited. It doesn’t handle payslips or pensions. For a small monthly fee, Simplex offers a complete, worry-free payroll service that handles everything for you—no faff, no gaps.
QuickBooks payroll can work well if you’re already using their software—but you’ll still be managing submissions and staying on top of updates. Many small businesses prefer handing everything to a service like Simplex, where payroll is fully managed for you.
Yes, but you’ll need to manage tax codes, RTI reports, auto-enrolment and deadlines yourself. It can be time-consuming and risky. Most small business owners find it easier to leave payroll to a trusted accountant like Simplex.
Not legally—but practically, it helps a lot. An accountant like Simplex can take the entire process off your hands, from payslips to pension submissions. That means fewer headaches and more time to focus on growing your business.