Simple, supportive accounting that helps your small business grow
Online accountant for small business UK services from Simplex give you clear finances, ongoing support, and confidence that everything is handled properly, without the stress. We work with small businesses across the UK, providing personalised accounting, tax planning, and unlimited support, all for a simple monthly fee.
Clear, Stress-Free Finances
We keep your bookkeeping, accounts, and tax organised and easy to understand. No jargon, no chasing, just clarity.
Unlimited Personal Support
Call, text, or email us whenever you need help. We’re here whenever questions come up, at no extra cost.
Built to Scale
We provide ongoing support to help you understand your figures, stay on top of tax, and make confident decisions.
What’s Included in Our Service
When you work with Simplex, everything is designed to keep your finances clear, organised, and supported all year round.
✅ Year-end accounts and Corporation Tax
✅ Self Assessment for directors and sole traders
✅ Ongoing bookkeeping support
✅ VAT registration, returns, and ongoing support
✅ Payroll support using BrightPay and Modulr
✅ Clear answers when questions come up
✅ Unlimited calls, texts, and emails
✅ 48-hour response guarantee
You’ll always know where you stand, what’s been handled, and what’s coming next.
“Simplex are super easy to work with. I love that I have a portal to track all documents and paperwork that need my attention. Everything else just seems to run in the background so I can focus on my business.“
Jordan, Designer
We’re Real People Who Support Your Business
You’ll never be passed around or left waiting. At Simplex, you get personal, human support from people who take the time to understand your business and how you work.
We build real relationships with our clients, so you always know who you’re speaking to and feel comfortable asking questions. From day-to-day support to year-end deadlines, we’re here to keep things clear, calm, and under control.
A Better Way to Do Small Business Accounting
As a small business owner, you don’t just need someone to file your accounts once a year. You need ongoing support, clear answers, and proactive support.
Our online accounting service is designed to remove confusion, save tax, and give you peace of mind all year round.
We work entirely online, making it easy to share documents, check figures, and stay informed wherever you are in the UK. You’ll always know what’s happening with your finances and what to do next.
“Lucy and the team are amazing at just getting the job done. I know I don’t have to worry about my invoices or tax – the one thing I was worried about. All the stress is taken away…“
Sapna, Marketing Agency Owner
Simple Accounting
We set you up with easy, reliable tools so your finances stay organised without adding to your to-do list. Everything is customised for the way you work, and we’re always here if you need help.
Xero
Stay organised without spreadsheets.
See your income, expenses and invoices in one place, always up to date and ready when you need it.
dext
No more chasing receipts.
Snap a photo or forward an email, and your bills and receipts are stored, sorted and matched to your accounts.
brightpay
Stress-free payroll.
Payslips, pensions and submissions are taken care of, always on time and fully compliant with HMRC
Getting Started is Easy!
We’ve made it simple for you to get the help you need:
Book a Free Call
Tell us about your business and what you need.
Send Your Info
Share your financial details securely online.
We Do the Work
We’ll sort your accounts and keep everything up to date.
Stay in Control
Get updates and support, so you always know where you stand.
Book your free discovery call! It will only take a minute
Time to Switch Accountants?
You don’t need to stay stuck with support that’s slow or confusing. Switching to Simplex is smooth and handled for you.
Seamless Transfer
We contact your previous accountant and securely move everything over, CIS, VAT, payroll and more.
No Disruption
Your accounts stay up to date while we handle the switch, so nothing gets missed.
A Fresh Start
We review your numbers, identify gaps, and get you set up with a clear plan that works for you.
Ready to switch? Let’s make it happen.
Helpful Resources
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!
The cost of an accountant for a UK small business depends on your business structure, the level of support you need, and how organised your records are. Sole traders usually need less support than limited companies. Rather than focusing on cost alone, it helps to think about value. A good accountant supports compliance, improves tax efficiency, and helps prevent problems that can arise later.
You are not legally required to use an accountant, but many UK small business owners choose to. An accountant helps you meet HMRC requirements, claim allowable expenses, and submit everything correctly. As your business grows, your responsibilities become more complex. Professional support gives peace of mind and allows you to focus on running and developing your business.
ChatGPT can be helpful for general explanations or understanding basic accounting terms, but it cannot replace a UK accountant. It cannot review your records, submit returns to HMRC, or provide support tailored to your situation. An accountant understands your business in detail and ensures your accounts are accurate, compliant, and handled in a tax efficient way.
Yes, many small business owners manage their own bookkeeping, especially when their finances are simple. Accounting software can make this easier. However, mistakes are common and are often discovered later. Many businesses complete their own bookkeeping but rely on an accountant to review the figures, prepare accounts, and handle HMRC submissions correctly.
If you are self-employed, you do not legally need an accountant, but many people find it beneficial. An accountant can help with registration, Self Assessment, and understanding allowable expenses. They also help you stay on top of deadlines and plan ahead, which reduces stress and lowers the risk of errors or penalties from HMRC.
For most UK small business owners, using an accountant is worthwhile. They help you stay compliant, avoid mistakes, and make better decisions using clear financial information. They also save you time and mental effort. Having a trusted professional managing your accounts lets you focus on growing your business with confidence.
