About Taxestool

Taxestool publishes 95 free, instant calculators for taxes, salary, mortgages and personal finance across 8 countries. Everything runs in your browser — your numbers never reach a server. No signup, no tracking, no paywalls, no pretending we're a SaaS.

What we publish

Every calculator is built around an individual country's official tax rules and updated each year as those rules change.

Browse the full list on the homepage, or press ⌘ K (Mac) / Ctrl K (Windows) from any page to jump to a calculator by name.

Editorial standards

How we source data

Every tax rate, threshold, bracket and rule comes from the country's official tax authority — the IRS in the US, HMRC in the UK, the BMF and §32a EStG text in Germany, the CBDT in India, the CRA in Canada, the ATO in Australia, IRD in New Zealand. Every constant in our codebase is annotated with the source URL it was derived from. Where official sources publish multiple versions of a number (e.g. proposed vs enacted), we use the enacted version and explicitly flag projections in the page footnotes.

How we update

Tax-sensitive constants are re-verified on the following cadence:

  • US — after each annual IRS Revenue Procedure (typically October), plus state-by-state updates as published. SSA wage bases and FICA rates: each November/December.
  • India — after each Union Budget (typically February) and any mid-year CBDT notifications. GST slab changes: as the GST Council publishes them.
  • UK — after each HMRC Budget and after the Scottish Government's annual rates announcement.
  • Germany — at the start of each calendar year, when the BMF publishes the new §32a EStG coefficients and the Bundesregierung publishes the new Beitragsbemessungsgrenzen.
  • Canada — annually after the CRA federal indexation announcement and each provincial finance ministry's update.
  • Australia / New Zealand — after the start of each financial year (1 July in Australia, 1 April in NZ).

How we verify

Every calculator's underlying logic is a pure TypeScript function with a spot-check suite that compares our outputs to figures the country's official tax authority publishes — usually their own worked examples or reference tables. We run those checks on every change. Each tool page shows a last reviewed date in the byline at the top — that date reflects the most recent confirmation that the constants and formulas still match the official rules.

Privacy by design

The numbers you type — your salary, mortgage, tax inputs, VPA, anything — never leave your browser. Calculators are implemented as client-side JavaScript that runs locally on your device. You can verify this in any browser: open DevTools → Network tab, then change inputs and confirm that no network requests are made when you compute results.

We use Google Analytics for aggregate pageview counts (which calculators are popular, which countries our visitors come from). We do not see, log, or store the values you enter into any calculator. We do not sell or share data with anyone. The Privacy Policy has the full breakdown including cookies and the AdSense relationship.

How we make money

Taxestool is funded entirely by display advertising (Google AdSense). That's the entire business model. What we explicitly do not do:

  • Take affiliate commissions for products mentioned in our calculators (e.g. we won't push a particular HSA provider, lender, or KiwiSaver fund because they paid us).
  • Sell a "Pro" tier or paywall any calculator.
  • Run sponsored content, paid placements, or vendor-influenced outputs.
  • Sell user data — there is none to sell.

If a calculator recommends a third-party tool or service, it's because the service is genuinely useful and we have no financial relationship with the vendor.

What we don't do

These calculators are accurate estimation tools, not professional advice. They're designed for everyday questions like "roughly how much will my take-home pay be?", "what's my monthly mortgage payment?", or "is the new tax regime cheaper for me?" — questions that don't need a CPA but benefit from honest, transparent math.

For filing returns, audit defense, complex investment decisions, or international tax matters, please consult a qualified tax professional or your country's tax authority. We don't:

  • File returns on your behalf.
  • Provide individualised tax advice.
  • Replace your accountant for nuanced situations (RSUs, ESOPs, foreign income, capital gains, GST registration thresholds, salary sacrifice into specific super funds, etc.).

Tax years currently supported

CountryTax / financial yearPrimary source
🇺🇸 United States 2026 IRS Revenue Procedure + state Departments of Revenue
🇨🇦 Canada 2026 CRA federal + each provincial finance ministry
🇬🇧 United Kingdom 2025-26 HMRC + Scottish Government
🇩🇪 Germany 2026 §32a EStG + Bundesministerium der Finanzen (BMF)
🇦🇺 Australia 2025-26 Australian Taxation Office (ATO)
🇳🇿 New Zealand 2025-26 Inland Revenue (IRD)
🇮🇳 India 2025-26 Union Budget, CBDT, GST Council

Authoritative sources

Direct links to the official tax authority sources our calculators draw from. Every calculator's individual page links back to the specific publication it took its constants from.

Get in touch

Spotted an incorrect figure in a calculator? Have an idea for a tool we should build? Need a calculator for a country we don't yet cover? Visit the contact page — we read every message.