About

Professional tools, built by professionals

GovernStack exists because most free online calculators are built by marketers, not domain experts. We think that's worth fixing.

What we do

GovernStack provides free utility tools for UK finance, cybersecurity compliance, and business operations. Every tool is designed to give professionals, contractors, and business owners a fast, accurate starting point — without requiring a login, subscription, or software installation.

Our tools cover UK tax calculations (including the often-overlooked Scottish income tax bands), IR35 contractor comparisons, GDPR fine exposure estimates based on ICO enforcement practice, data breach cost modelling grounded in IBM research, and business tools like risk matrices built to ISO 31000 standards.

The difference between GovernStack and a generic calculator site is that our tools are built with an understanding of how these frameworks actually work in practice — not just what the headline rate is.

Our principles

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Your data stays with you

Every calculation runs in your browser. We never receive, store, or transmit your inputs — not even the password you enter into the strength checker.

⚡

No friction

No account. No signup. No paywall. Search for a tool, use it, leave. That's the entire user journey.

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Regulation-grounded

Our tools are built on current UK legislation, HMRC guidance, ICO enforcement data, and industry benchmarks — not guesswork.

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Kept current

Tax bands, NI thresholds, GDPR fine limits, and other figures are updated each tax year and when material regulatory changes occur.

Current tools

£ Finance

→VAT Calculator →Salary Calculator →IR35 Calculator →Day Rate Calculator →Rate Converter

🛡️ Cybersecurity

→Password Checker →Breach Cost Calculator →GDPR Fine Estimator

📊 Business

→Risk Matrix →Meeting Cost

A note on accuracy

GovernStack tools are for estimation and informational purposes. They do not constitute professional financial, tax, legal, or compliance advice. Figures should always be verified with a qualified accountant, solicitor, or specialist before any decision is made. See our Terms of Use for full details.