Sole Trader Accounting That Saves You Time and Tax
Running a business as a sole trader can feel overwhelming, especially when you’re juggling invoicing, expenses, tax returns and HMRC deadlines on your own. At Simplex, we specialise in sole trader accounting that removes the stress, keeps you compliant, and helps you keep more of what you earn. You’ll get clear advice, unlimited support, and a proactive accountant who actually understands your business. No jargon. No surprise fees. Just simple, reliable accounting that works around you.
👉 Book Your Free Consultation (takes less than 30 seconds)
Pay Less Tax
We proactively review your income and expenses to make sure you’re claiming everything you’re entitled to. Our goal is simple: reduce your tax bill while keeping you fully compliant with HMRC.
Simple Systems
We set you up with easy-to-use apps so you can track income and expenses without spreadsheets or confusion. If you run payroll, we’ll manage it smoothly using tools like BrightPay and Modulr, so everything just works.
Unlimited Support
Call, Whatsapp or email us as often as you need; it’s all included. You’ll have a dedicated accountant who knows your business and responds within 48 hours, guaranteed.
Why Sole Traders Choose Simplex
Sole traders often come to us feeling unsure whether they’re doing things right, or worried they’re paying more tax than they should. Our sole trader accounting service is designed to give you clarity, confidence and control from day one.
We support sole traders across the UK, from freelancers and contractors to tradespeople, consultants and online business owners.
What’s Included in Our Service
This service covers the essential accounting support sole traders need to stay compliant, organised and confident, with everything delivered online and backed by real human support.
✅ A dedicated accountant who takes time to understand your business
✅ Day-to-day bookkeeping guidance and regular checks
✅ Preparation and submission of your Self Assessment tax return
✅ Clear advice on expenses and mileage claims
✅ HMRC support with reminders so nothing is missed
✅ Ongoing tax advice to help you plan ahead
✅ Unlimited contact by phone, text or email
All provided through simple online systems, with support that feels personal, not automated.
“My absolute dread has always been my self-assessment… I found Lucy’s number, and nothing was too much trouble. Friendly and so accommodating, and never too busy to answer questions. A gem of a find“
June, Beauty Therapist
A Personal, Hands-On Approach
We don’t believe sole traders should feel small or overlooked. At Simplex, you’re treated like a valued client from day one. We take the time to understand your goals, explain everything in plain English, and support you as your business grows.
You’ll never be passed around or left waiting weeks for answers: just friendly, proactive support when you need it.
📞 Opening hours: 9 am–6 pm
⏱️ 48-hour response guarantee for all clients
Support Wherever You Are
Simplex works entirely online, which means you can get expert accounting support wherever you are in the UK. There is no need to travel, post paperwork or book in-person meetings. Everything is handled digitally using secure systems, with clear communication throughout.
You will still have a real accountant who knows your business and is easy to contact. Being remote allows us to respond quickly, work flexibly around you, and keep our service simple, efficient and cost-effective.
“Lucy and the team are always so helpful and efficient. I trust them to take care of all my accounting, so I don’t have to worry about anything! Great service.”
Catherine, Florist
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!
Yes, you can do your own accounting as a sole trader, especially when you’re just starting out. Many people use simple software to track income and expenses and submit their Self Assessment. However, mistakes can be costly, and tax rules change often. Working with an accountant gives you peace of mind, helps you claim the right expenses, and frees up time to focus on running your business.
Legally, a sole trader doesn’t have to use an accountant. That said, many choose to because it makes life easier. An accountant helps you stay compliant with HMRC, meet deadlines, and understand your numbers. If you want confidence that your tax return is correct and you’re not overpaying tax, having an accountant is a smart and often stress-saving decision.
An accountant supports sole traders with tax returns, expense claims, and HMRC compliance. They can review your bookkeeping, prepare your Self Assessment, and advise on tax-saving opportunities. Many also help with cash flow, pricing, and planning for growth. Essentially, they take the pressure off the financial side of your business so you can focus on earning and building confidence.
Being a sole trader is simple, but there are downsides. These include unlimited personal liability, fewer tax planning options, and less credibility with some clients. You’re fully responsible for admin, tax, and compliance, and income can be unpredictable. There’s also no separation between you and the business financially. An accountant can help reduce these risks and highlight when incorporation may be beneficial.
Yes, you must tell HMRC if you start trading as a sole trader. This is done by registering for Self Assessment, usually by 5 October following the end of your first tax year. Failing to register on time can lead to penalties. An accountant can handle the registration for you and make sure everything is set up correctly from the start.
