I’m Cecil Biondo, a UK-based Web Developer and the creator of VatCalc.Onl, a digital platform designed to simplify VAT calculations for individuals, freelancers, accountants, and business owners across the United Kingdom. With a strong background in building tax-focused software tools, I specialise in creating fast, accurate, and user-friendly VAT calculators that help users find VAT-inclusive, VAT-exclusive, and reverse VAT values instantly.

My experience in digital development allows me to transform complex tax formulas into simple online tools that anyone can use confidently—whether they are completing quarterly VAT returns, reviewing invoices, or learning how VAT works for the first time.
Academic Background & Professional Qualifications
I completed my Bachelor’s Degree in Computer Science at the University of Hull in 2016, where I focused on software development, algorithm optimisation, and real-world financial applications. My final-year project involved creating a lightweight tax computation engine, which laid the foundation for VatCalc.Onl.
In 2019, I completed a Professional Diploma in Web Technologies & Cloud Deployment from the British Computing Society (BCS). My coursework included API design, server-side security, and financial data automation—skills that now support my work in building efficient online tax tools.
I also hold certifications in:
- Web Application Security (Cyber Essentials UK)
- Frontend Engineering – JavaScript Frameworks Certification
- Financial Computation Fundamentals – Institute of Financial Accountants (IFA)
These qualifications ensure that VatCalc.Onl is not only accurate but also secure, modern, and fully optimised for fast performance on all devices.
What I Do at VatCalc.Onl?
- Build and optimise VAT calculation tools for UK users
- Maintain updated VAT percentage logic aligned with HMRC rate changes
- Ensure accurate VAT-inclusive and VAT-exclusive algorithms
- Deliver fast and mobile-friendly calculator interfaces
- Provide troubleshooting guidance for input errors and browser issues
- Create detailed guides explaining how VAT works for different industries
Quick Facts
| Attribute | Detail |
|---|---|
| Profession | Web Developer & Digital Tax Tools Creator |
| Expertise | VAT Calculation Systems, FinTech Tools, Web Development |
| Location | Spring Bank, Hull, Kingston upon Hull, HU3 1NP, United Kingdom |
| [email protected] | |
| Fun Fact | “I love transforming complex tax rules into tools that anyone can use with a single click.” |