Your tax model lives in a spreadsheet only one person dares edit. There's a better way.
We rebuild your tax and accounting Excel models as clean, branded web calculators — same formulas, audit-ready, that clients can run themselves while you capture every lead.
Get Your Free Conversion BlueprintEvery tax year forks the file
2023_model, 2024_model_FINAL, 2024_model_REVISED — rates and bands drift between copies. A web app updates once, centrally, for everyone.
One analyst owns the logic
When the person who built the model is unavailable, the firm can't trust the numbers. Web code is documented, tested, and owned by the practice — not trapped in one head.
Clients can't self-serve
You can't safely email a working tax model to a client. A branded web calculator lets prospects get an instant estimate and hands you a qualified lead.
We've Built This Before
Real Excel-to-web conversions delivered for clients in your field.
UK Corp Tax Calculator
Comprehensive UK corporation tax calculator with personal vs company tax split, BIK calculations, and 15+ color-coded outputs.
View Case Study
Work From Home Tax Allowance Calculator
UK tax tool with conditional form logic, multi-year support, utility cost breakdowns, and PDF export for HMRC.
View Case StudyPlay With a Live Example
A working calculator running entirely in your browser — the kind of tool we'd build from your spreadsheet.
Loan Payment Calculator
Adjust the inputs — results update instantly
Frequently Asked Questions
Yes. Every formula, lookup table, threshold, and conditional rule is recreated in clean web code and tested against your original spreadsheet before delivery — down to the rounding.
Yes. We've built UK corporation tax, work-from-home allowance, and similar calculators with banded rates and region-specific rules. Complex conditional logic is exactly what custom code handles better than a fragile workbook.
Calculations run server-side, so your formulas are never exposed in the browser. We sign NDAs before reviewing any file, and you own the full source code and data — no platform lock-in.
Get Your Free Conversion Blueprint
Send us your Excel file — or just describe it — and we'll send a complete conversion analysis within 24 hours.