About CalcGeo
CalcGeo is a free calculator tool that gives you accurate, location-specific results for taxes, salary, and property costs. We use real government tax data — not generic estimates — so the numbers actually match your situation.
The Core Problem: Why Generic Calculators Fail
The internet is flooded with generic calculator directories that swap city or country names into a one-size-fits-all mathematical formula. A salary calculator built for California cannot simply have “Scotland” swapped into its heading: California levies state disability insurance (SDI) and progressive mental health surcharges; Scotland features a unique six-band devolved income tax system entirely distinct from England and Northern Ireland.
CalcGeo was created to solve this problem. Every calculator on our platform answers one clear question: “How much tax will I actually pay — or how much will I take home — based on where I live?”
Privacy-by-Design: The 100% Client-Side Engine
Most online financial tools force users to send their private salary, bonuses, mortgage balances, and personal deduction details across the internet to centralized backend databases. This introduces immense risks of data breaches, marketing monetization, and third-party profiling.
Browser-Local Execution
Calculators are shipped as compiled JavaScript modules. When you move a slider or change an input, computation executes locally on your CPU via your browser runtime.
Zero Financial Data Transmission
Not a single dollar, pound, or euro you enter is transmitted over HTTP to our servers. We have no database of user salaries and never will.
Ephemeral In-Memory State
Closing or refreshing your browser tab immediately destroys the calculation memory state. Your financial records remain solely your own.
Learn more about our data protection commitments in our detailed Privacy Policy.
How we verify our calculators
Here's how we make sure every calculator is accurate:
Step 1: Go straight to the source
We get our tax rates directly from official government sources — things like IRS publications, HMRC guidance, CRA tables, and the ATO website. We never copy from blogs or third-party aggregators.
Step 2: Build accurate calculations
Tax codes have complex rules — like the UK personal allowance tapering off above £100,000, or Ireland's multiple USC bands. We code these precisely so no detail is missed.
Step 3: Test edge cases
Every calculator is tested against real-world examples: minimum wage workers, high earners, first-time buyers, and more — to make sure the results are right in every scenario.
Step 4: Cross-check against official calculators
We run our results against official government tools — like the HMRC PAYE tax checker, the CRA payroll deductions calculator, and the ATO tax withheld estimator — to confirm our results match.
Countries we cover
CalcGeo has calculators for six English-speaking countries:
United States
Internal Revenue Code (IRC), FICA (Social Security & Medicare), State Income Tax schedules (50 states + DC), Standard Deduction inflation adjustments (IRS Rev. Proc.).
United Kingdom
Income Tax Act 2007, Finance Acts, HMRC PAYE tax bands (including Scottish & Welsh devolved rates), Class 1 National Insurance Contributions (NIC), and Stamp Duty Land Tax (SDLT).
Canada
Income Tax Act (R.S.C., 1985), Canada Pension Plan (CPP / CPP2 enhancements), Employment Insurance (EI), Federal and Provincial tax brackets (Ontario, BC, Alberta, etc.).
Australia
Income Tax Assessment Acts (ITAA 1936 & 1997), PAYG withholding schedules, Statutory Superannuation Guarantee (12% since 1 July 2025), Medicare Levy & surcharge thresholds.
New Zealand
Income Tax Act 2007, PAYE operational tax tables, ACC Earners' Levy statutory maximum caps, KiwiSaver default employee and employer contribution matrices.
Ireland
Taxes Consolidation Act 1997, Budget statutory revisions, Universal Social Charge (USC) progressive tiers, PRSI Class A1 contributions, and local property/stamp duties.
Our independence & sources
CalcGeo is an independent, non-governmental computational project. We are not owned, operated, contracted, or endorsed by any taxation agency, revenue commissioner, or ministry of finance.
All government names (e.g. IRS, HMRC, CRA, ATO, IRD, Revenue Ireland) are cited under nominative fair use principles solely to clarify the jurisdictional applicability of our mathematical models. For full legal disclaimers, please consult our Disclaimer and Terms of Service.
Spotted an error? Let us know
We are committed to absolute accuracy. If you are an accountant, tax attorney, payroll specialist, or taxpayer who notices an upcoming budget amendment, updated indexation figure, or mathematical discrepancy, we welcome your feedback.
Direct Verification Desk: calcgeo.online@gmail.com
General Inquiries: calcgeo.online@gmail.com
Please include a link to the relevant official source or government publication so our team can check and update it quickly.