Stop Guessing Your Numbers. Finally Feel in Control.
Your accounts should not be something you dread. Simplex helps UK business owners use Xero properly, keep their finances organised and understand exactly where they stand. You get clear numbers, smart tax support and a friendly accountant you can actually speak to, so you can stop guessing, stop panicking and start running your business with confidence.
Know Where You Stand
Open Xero and trust what you see. We keep your accounts clear, accurate and up to date, so you always know what is happening in your business.
Stop Tax Being a Surprise
Know what tax is coming before it becomes a problem. We help you plan ahead, claim what you can and avoid last-minute stress.
Ask Without Feeling Awkward
You get unlimited calls, texts and emails at no extra cost, plus a 48-hour response guarantee. When something is on your mind, you can simply ask.

Stop Carrying the Stress
of Your Accounts
Running a business is hard enough without feeling behind on your finances. Maybe Xero feels messy, your tax feels uncertain, or you are not sure whether your numbers are right.
As your Xero Accountant UK, Simplex helps you sort it properly. We make your accounts easier to understand, easier to manage and easier to trust, so you can stop worrying and get back to running your business.
You need to know what is going on, what needs doing and what comes next. That is what we help you do.
Make better decisions with confidence
When your accounts are unclear, every decision feels harder. Can you take money out? Is there enough for tax? Are your expenses correct? Is your business actually making the profit you think it is?
Simplex gives you clear answers.
We keep your Xero records organised, explain your numbers in plain English and help you plan ahead. You will know where your money is going, what tax to expect and what your next move should look like.
The result is simple: fewer surprises, better decisions and more confidence.

“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, Design

Feel More Confident as a Business Owner
Messy accounts can make even a good business feel chaotic. You end up reacting to problems, avoiding the numbers and hoping everything is fine.
Simplex helps you move out of that place.
With your accounts handled properly, you can make decisions with numbers you trust. You can plan for tax instead of fearing it. You can see what is working, what needs attention and where your business could go next.
This is not just about having Xero set up.
It is about becoming the business owner who feels informed, prepared and in control.
Support That Makes Life Easier, Wherever You Are
You should not have to wait weeks for a reply or feel silly for asking a question.
Simplex is a fully remote accountancy firm, so wherever you are in the UK, you can get the support you need without needing to travel or book in-person meetings.
With Simplex, support is built into the relationship. Every client gets unlimited communication by phone, text and email at no extra cost. Our opening hours are 9 am – 6 pm, and we give every client a 48-hour response guarantee.
That means you are not left sitting with the worry.
You can ask, get clarity and move on with your day.

“Simplex have been with our company from the start and are a crucial linchpin in our Operations. They are organised, methodical, quick to respond to needs and queries and ultimately professional while maintaining a friendly, caring approach. We couldn’t ask for more.”
Neil, Construction
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
See your numbers clearly.
Your income, expenses, invoices and reports are kept in one place, so you can understand your business without relying on guesswork.
dext
Stop losing time to receipts.
Snap and send receipts easily, so your records stay organised and you do not have to dig through emails, bags or folders later.
brightpay
Make payroll feel simple.
Payslips, pensions and payroll submissions are handled clearly, so you and your team know payday is sorted.
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.
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!
A Xero accountant is an accountant who uses Xero to manage your bookkeeping, accounts, tax and financial reporting. Simplex helps UK businesses use Xero properly, so your numbers stay clear, organised and easier to understand throughout the year.
The cost of a Xero accountant in the UK depends on your business type, size, turnover and the level of support you need. Simplex offers personalised support, so your package is based on what will actually help you feel clear, compliant and in control.
Yes, many businesses still benefit from an accountant even if they use Xero. Xero helps record and organise your numbers, but an accountant helps you understand them, plan for tax, avoid mistakes and make better business decisions.
Yes. A Xero accountant can help with tax returns, including Self Assessment, Corporation Tax and VAT returns. Simplex also helps you plan ahead, so tax feels less stressful and you know what may be due before deadlines arrive.
Yes. You can switch accountants if you already use Xero. Simplex can help move everything across smoothly, review your current set-up and make sure your accounts stay organised during the changeover.

