Start
achieving
your business goals.

Small business & company accountants
Why Choose City Mill?
Leading small business accountants
We’ll make your small business accounting as simple as possible, we then use this information to help you achieve your business goals. Whether you’re a solo entrepreneur, small business owner, self-employed, a landlord, or managing an SME, our mission is to support your success.
Our accountants have world wide recognisable training and qualifications, from degrees and PhDs to chartered accountants and chartered tax advisers.

How it works
Streamlined small business accounting services.
We’ve simplified small business accounting into a stress-free process, so you can focus on what you do best—running your business.
Forward your paperwork to us
Send us your documents by email, post or in person
1
1
We process everything
Our experts process, organise and review your financial data
2
Business Partner review
Receive insights and updates tailored to your business goals
3
Compliance work completed
We complete your tax returns and accounts on time and hassle-free
4
No jargon. No stress. Just results.
1
Forward your paperwork
Send us your documents securely and easily.
2
We Process everything
Our experts organise and review your financial data.
3
Partner review
Receive insights and updates tailored to your business goals.
4
Compliance work completed
We handle the self assessment tax returns, VAT returns, and year-end accounts—on time and hassle-free.
Business partnering
Realising your business goals.
We go beyond accounting. We’re business partners, offering insights and strategies tailored to your specific business goals.
Using our simple four step plan we’ve helped hundreds of businesses achieve measurable results.
Setting clear goals
1
Developing a business plan
2
Monitoring progress
3
Achieving success
4
The reason we're leading small business & company accountants.
1
Setting clear goals
2
Developing a business plan
3
Monitoring progress
4
Achieving success
Where We Are Based and Our Service Area
Small business accountants across Hampshire, West Sussex and beyond.
As accountants based in Southampton, Winchester and West Sussex, we’re well placed to support businesses and individuals across the South East.
With easy access to routes like the M3 and A27, we’re never far away — but location isn’t a barrier.
We work with clients throughout England and Wales, combining our expertise with remote capability to build long-term partnerships, wherever you’re based. If you’re nearby, we’re happy to arrange free meetings at your home, workplace or a local venue.

about city mill
While we provide all the services you’d expect from a small business accountant, such as accounts and tax returns, our true expertise lies in realising your goals. This could be scaling your business, identifying new markets and services, improving key business metrics such as profitability, streamlining operational processes and reducing wastage, identifying and managing risks, creating exit strategies, as well as tax efficiency. Which is why we are the go to small business accountants in West Sussex.
We worked with the client to explore mitigating factors, together with our experience we successfully negotiated the appeal on behalf of our client, saving them over £12,000 in penalties.
We worked with our client to adapted their service so they could successfully target an under served niche sector which was much more profitable.
Worked with a client which is projected to save them over £100,000 in tax over the next 5 years.
We reduced the effect of foreign exchange volatility by 68% for our client giving them long term stability.
Within 30 days we prepared the accounts for a large multinational company, and lead the successful audit to hit the statutory deadline.
We Identified over £20,000 in overpaid VAT for a new client. It will also save them over £5,000 per quarter.
We performed a deep review of our clients business, we identified under performing segments, managed the capital reallocation to more profitable areas. This lead to over a 50% increase in net profit.
We worked with our client to improve their marketing and coupled with our contacts and business connections our client is now at full capacity.
We advised on the successful $100m+ acquisition for our client, helping to negotiate favourable terms.
We centralised the support functions for the client and implemented new software. This improved their net margin from 10 to 12%.
We successfully negotiated no penalties to be charged in respect to the income they hadn't reported to HMRC over a 4 year period which saved them at least £10,000 in penalties.
Our client was experiencing high growth but their bank account was empty. We made improvements to their working capital cycle which reversed the loss of cash allowing them to continue growing at an exception rate.
We developed our client's understanding of their costs, which allowed them to submit more competitive bids, leading to a 10% increase in success rate.
We successfully renegotiate our clients repayment terms allowing them to continue trading.
Using our knowledge of software we were able to work with our client to streamline their information gathering, meaning they can spend more time focusing on creating growth.
Withing 12 months we got them into their own unit! How did we do it? We improved their financial position and profitability, and then presented their results and forecast to a panel of lenders to secure the best deal.