Combine your incorporation with expert accounting and build a strong foundation for growth.
Starting your business with proper incorporation and accounting gives you a strong foundation to grow.
Ensure your Companies House and HMRC obligations are handled correctly from the start
Sleek’s online accountancy services helps you avoid penalties and keeps your business on track.
Our in-house UK accounting experts ensure you can focus on winning customers and building your product.
Covers all essentials:
Included as part of Accounting services
Included as part of Accounting services
A trusted small business accountant by your side for expert advice and ongoing support whenever you need it.
Year-end accounts and tax return
We handle your annual accounts and tax return so you meet every deadline without stress.
We take care of your Companies House filing so your business always stays compliant.
Xero included, giving you clear financial visibility with modern, easy-to-use tools.
You also get:
Ricky Hill
Co-Founder , SYNCR
“They always submit our filings in on time, and their tax advice is spot on. Seriously, they’ve made things so much easier for us. I’d totally recommend Sleek to anyone looking for awesome accounting help!”
Neil Smedley
Founder, King Koby Ltd
“I truly wouldn’t be able to run my business without Sleek. Whilst I’m great at marketing and the sales side of running a business, I’m just not a numbers guy! Sleek has changed the way I look at an accountant.”
Anthony Dickens
Founder & CEO, Hookshot
“Everything we have needed has been done with minimal fuss leaving us to get on with running the business, it’s always great to know we’ve got the Sleek team behind us for any accounting-related matters or advice.”
Seb Francis
Co-Founder & Director, Titus Learning Ltd
“We’ve been with Sleek since the very beginning of our business. They helped with Seed EIS, R&D and implementing an online cloud bookkeeping system through Xero. Sleek has undoubtedly helped us grow our business.”
Sarah Quinn
Director, Dead Cat Audio Ltd
“I’ve been with Sleek for years and as they have expanded their team their attention to providing a good service has continued.”
Jonathon Collie
Founder, Lifework Lab
“Got us SEIS/EIS AA in exactly 2 weeks from initial contact to HMRC certification. Their templates and process are spot on. Affordable too. Would have taken me forever. Best value for money I’ve experienced for a long time.”
Our team are experts in limited companies, sole trader, self employed, and tech startup accounting. We also act for individuals preparing Self Assessment tax return. They are always available to assist you on accounting, taxes, payroll, and all compliance and advice. We are your partner, invested in your success.
End-to-end support
From company formation to tax returns and scaling advice — all managed by one dedicated team on one platform, so you never juggle multiple
Tech-first accounting
Our modern platform makes online accountancy simple and accessible, with automated tools and real-time insights so you stay in control.
In-house UK experts
We never outsource. Every accountant you work with is part of our dedicated UK-based team, ensuring consistent expertise and personal support.
Built for growth
We go beyond compliance. Sleek’s professional UK accountants guide you with clear advice so your business can scale confidently.
When you’re starting a small business, choosing the right accountant is a big decision. Our awards and certifications give you the reassurance that our accountancy services for new businesses put you on the right footing for growth.
Mariajosé Argote | Growth Strategy & Ops Advisor
“I’ve been using Sleek for several months now and it has been a great experience. They are organised, responsive, and helpful.”
Our accounting services are built for entrepreneurs at every stage. From the moment you incorporate to scaling nationwide, our in-house team gives you the business accountancy support you need.
New Businesses
Start strong from day one. Our professional accountants UK handle your first filings and set up your accounts so your new company is compliant from the start.
Good for: Sole traders, limited companies, and partnerships
Entrepreneurs & Startups
Ambitious founders need more than compliance. Our online accountancy services combine tax expertise with growth advice to help startups scale faster.
Good for: Startups, contractors, and LLPs
Small Businesses
Running a business is enough work without chasing deadlines. With Sleek’s reliable accountant services, you stay compliant while focusing on customers and cash flow.
Good for: Partnerships, limited companies, and family-run businesses
Established Companies
Growth brings complexity. Our scalable solutions, delivered by experienced accounting experts UK, keep your company compliant while supporting your next stage of expansion.
Good for: Limited companies, LLPs, and contractors
Practical guides on starting and growing your business in the UK. From incorporation to compliance, our accounting services and insights from UK accounting experts help you stay on track and ready to scale.
Do I need an accountant when starting a new business?
Yes. Accountancy services at incorporation help you register correctly, set up tax obligations, and avoid costly mistakes. It gives your business the right foundation.
What are the benefits of using Sleek’s accountancy services?
Sleek provides in-house accountants, never outsourced. You also get modern software included, plus compliance and growth support in one place.
Are Sleek small business accountants?
Yes. We support thousands of small businesses across the UK. From sole traders and partnerships to limited companies, our accountants keep you compliant while freeing up your time.
Who are the best small business accountants in the UK?
The best accountants combine compliance expertise with practical business advice. Sleek is rated “Great” on Trustpilot by over 3,000 business owners who trust us to keep their finances simple.
Do you provide accounting services in London?
Yes. We have an office in London and work with clients nationwide, including Leeds and Manchester. Our services are fully online, so you get expert support wherever you are.
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How much does an accountant cost for a small business?
Our packages start from £60 per month. Pricing is transparent, with no hidden fees, so you know exactly what you are paying for.
What does Sleek’s accountancy package include?
Core services include annual accounts, tax returns, Confirmation Statement filing, a dedicated accountant, and Xero subscription. Extras like VAT, payroll, and bookkeeping can be added as you grow.
Can I switch from another accountant to Sleek?
Yes. We handle the transfer directly with your previous accountant and move your records securely. The process is quick and hassle-free.
Which accounting software do you use?
We include Xero with every package. It gives you real-time visibility of your cash flow and integrates seamlessly with your business tools.
Will my accounting tasks be automated?
Yes. Functions like bank reconciliation, invoicing, and expense tracking are automated. Your dedicated accountant is still there to guide you whenever needed.
Why do small businesses need professional accountancy services?
Professional accountancy ensures compliance, saves time, and reduces errors. For small businesses, it means less admin and more time to focus on growth.
What if my business revenue grows quickly?
Our services scale with you. Whether you are just incorporating or passing £350,000 in turnover, Sleek adjusts your support to fit your stage of growth.
