How We Calculate
Our methodology, data sources, and the assumptions behind every calculation.
Data Sources
Every tax rate on YourNetSalary is sourced directly from the official government tax authority of each country. We do not use estimates, third-party compilations, or crowd-sourced data. Each JSON data file includes a direct link to the official source page.
Sources are reviewed and updated at the start of each tax year — and immediately when governments announce mid-year rate changes.
What We Include
Our calculations include all standard deductions an employee faces:
- Income tax — including progressive brackets and any personal allowance or basic deduction
- Social insurance / National Insurance — employee contributions to state pension, unemployment, and health funds
- Solidarity surcharges — where applicable (e.g. Germany)
- Medicare / Health levies — where applicable (Australia, US)
What We Do Not Include
Some deductions vary too significantly by individual circumstance to include by default:
- Workplace pension contributions (varies by employer and employee choice)
- Student loan repayments (varies by plan and country)
- State and local income taxes in the US (varies by state)
- Provincial income tax in Canada (varies by province)
- Cantonal and communal taxes in Switzerland (varies by canton)
- Church tax in Germany and Austria (optional)
- Benefits-in-kind (company car, private medical, etc.)
- Tax reliefs and credits specific to individual circumstances
These factors mean your actual take-home pay may differ from our estimate. Our figures represent a standard full-time employee with no special deductions or reliefs beyond the universal ones.
Calculation Method
Income tax is calculated using the official progressive bracket method for each country. For each bracket, we calculate the tax owed on the portion of income falling within that band, then sum across all applicable brackets.
Example for the UK (2026/27 rates):
- First £12,570: £0 (Personal Allowance)
- £12,571–£50,270: taxed at 20%
- £50,271–£125,140: taxed at 40%
- Above £125,140: taxed at 45%
National Insurance and social contributions are calculated separately using their own threshold and rate structures.
Countries with mathematical progressive formulas (such as Germany) are approximated using bracket averages. We note this in the relevant calculator and our approximations are within 1–3% of the actual figure for most income levels.
Effective vs. Marginal Tax Rate
Effective tax rate: Total tax paid ÷ gross income × 100. This is the average rate across your entire income.
Marginal tax rate: The rate applied to the next £/$/€ you earn. This is the rate that matters when you're deciding whether to take on more work or accept a pay rise.
Update Policy
- Annual updates: All 22 countries are reviewed at the start of their respective tax year.
- Emergency updates: Mid-year rate changes (budget announcements, emergency legislation) are updated within 48 hours of official publication.
- Error corrections: Confirmed errors reported by users are corrected within 48 hours.
Each country's data file includes a lastUpdated and nextReview date, visible in our admin panel and available via the JSON files at /data/tax-rates/[country].json.
Disclaimer
YourNetSalary provides estimates for informational purposes only. Our calculations are not financial or tax advice. Always verify with official government sources or consult a qualified tax professional before making financial decisions.
Found an error? Let us know. Please include the country, the incorrect value, and a link to the official source. We take accuracy seriously.