CodeGeist builds practical, well-crafted digital tools for UK businesses and individuals. From tax calculators to bespoke applications — built properly, priced fairly.
Practical tools you can start using today. More on the way.
Calculate your personal tax position for 2025/26 and 2026/27. Employment, dividends, pensions, CGT, foreign income — all in one place. Generates a pre-filled SA100 reference PDF.
New tools are in development. If you have a specific problem that needs a well-built digital solution, get in touch — we may already be building it.
We build tools that solve specific problems — no bloat, no unnecessary complexity.
Got a process that's crying out for automation or a better interface? We build custom tools tailored to exactly how your business works.
Custom buildCalculators, reports, and reference tools built on current HMRC rules. Always accurate, always up to date with the latest rates.
UK focusedTools you can white-label or deploy for your clients — with licence management, access control, and branding built in.
B2B readyNo unnecessary dependencies. No subscriptions to third-party services. Tools that run entirely in the browser when possible — private by design.
Privacy firstDescribe what you need — a process, a calculation, a tool, or an idea. We'll ask the right questions.
A clear proposal with timelines and a fixed price. No hourly billing surprises.
You see it early and often. Iterations are part of the process, not an extra charge.
We keep tools current — rate changes, new requirements, improvements. Nothing is abandoned.
Whether you need a specific tool, want to licence one of ours, or have a problem that needs a software solution — we want to hear from it.