Accounting with clarity – precise, proactive, personal

Trusted advice, smart solutions, and unwavering support.

Your first call for financial guidance and support

Running a business is demanding – your accounting shouldn’t be. 

We provide clear, practical advice and smart solutions, allowing you to focus on running your business. With expertise and a personal touch not found with many chartered accountants, we make managing your finances easier, every step of the way.

How it works

Expert guidance, whenever you need it.

Straightforward advice to help you make informed financial decisions.

Smart, personalised solutions for every stage.

Tailored support that grows with your business and its needs.

Seamless, stress-free accounting.

We take care of the numbers, so you can move forward.

Services designed to support you and your business

From payroll to strategic advice, we offer reliable financial support tailored to your needs. Whether it’s tax or business planning, our services help you stay organised, compliant, and ready for what’s next.

See all of our services.

Audit and assurance

Calculo provides reliable audit and assurance services, combining technical excellence with a friendly, straightforward approach giving you clarity, compliance, and valuable insights for confident decision-making.

Audit and assurance services

Employee share schemes

Attract and retain top talent with well-structured share schemes. We provide expert guidance on tax-efficient incentives that reward employees while supporting your business goals.

Employee share schemes support

Mergers and acquisitions

Navigate business transitions with confidence. From valuations to due diligence, we provide strategic advice and financial insight to help you make informed, successful decisions.

Mergers and acquisitions services

Taxation

You can manage your tax obligations with ease. We provide expert planning, compliance, and advisory services to help you minimise liabilities, stay compliant, and make informed financial decisions.

Tax services

Business advisory

Calculo’s practical business advisory services offer clear, strategic advice and tailored support, helping your business confidently manage growth, improve profitability, and achieve lasting success.

Business advisory services

Outsourced accounting

Our efficient outsourced accounting services simplify your financial management, saving you time and resources, so you can focus confidently on running your business stress-free.

Outsourced accounting services

Specialist knowledge for your industry and sector

Different industries require different financial approaches.

We offer sector-specific expertise, delivered by experienced chartered accountants who understand your business. From tax planning to financial reporting, we ensure you’re efficient, compliant, and prepared for new opportunities in an ever-changing market.

"Growth, Success, and Expert Guidance"

"Jonathan has looked after me since the late 1990’s when I first established my own company, and has been instrumental in helping me grow, advising me all the way through the company’s lifecycle to include becoming a £35m company and my recent exit from the company involving a Company Purchase of Own Shares. Jonathan has always looked after my personal taxes throughout too."

 

Martin Rockley | Marcon Construction Limited

 

 

"10 Years of Trusted Tax & Audit Support"

"We have been using Rebecca and Jonathan for nearly a decade as auditors, accountants and tax advisers including complex Capital Allowances computations. We are a subsidiary of an overseas global company and Calculo have had considerable interaction with our parent company auditors for many years. Calculo have also given me proactive personal tax advice and assisted me in my share disposal to include valuations and maximising my family tax position. They have always been very helpful and the advice given over the years has proven to be 100%."

 

Brian O'Donoghue | ILPRA UK

"Timely & Trusted Financial Reporting for AIM Compliance"

"We have worked with Vikki Marzana and the team for our outsourced accounting and payroll provider since we first listed on AIM in 2017. Vikki Marzana has been our primary point of contact throughout that time and has consistently provided us with an excellent service. She is always available for questions and produces our monthly management accounts promptly and reliably. She is always of great assistance in our annual audit process, both during the planning and systems review pre year end and the post year end audit field work. This has enabled us to publish our annual accounts within 2 to 3 months of year end. As a public company, this is invaluable for investor confidence."

 

Cherif Rifaat | Zinnwald Lithium Plc

"Professional, High-Standard Audits – Every Time"

"Jonathan and the team had been recommended to me by a local law firm as we had been looking for new accountants to conduct our annual Audits. From initial contact both Rebecca and Jonathan have been verry helpful and professional throughout. The team at Calculo completed our audits rapidly and to the highest standards on time every time. We look forward to many more years working together for our audits and financial advice."

 

Neil Osborne | LVD UK LTD

"More Than an Accountant – A True Partner"

We've been working with Vikki at Calculo for some time now, and the support she has provided has been truly outstanding. She has consistently gone above and beyond to help us with our general and annual accounts, ensuring everything is accurate, timely, and stress-free.

Vikki also manages our payroll with great efficiency and attention to detail, giving us complete confidence that everything is handled correctly each month. Most notably, she has been instrumental in guiding us through the complex process of selling our company. Her expertise, responsiveness, and clear communication have made a huge difference during what could have been a very stressful time.

We can’t thank her enough for her professionalism and the high level of service she delivers. Highly recommended!

Abbie Clarke | Inspire Nurseries

Insights, updates, and resources

Explore the latest news and stay informed with financial advice from our blog.

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Reach out for practical advice and solutions designed around you, whenever you need it.