Data Sources & Attribution
AffordWhere uses data from official government statistical agencies and international organizations. All sources are publicly licensed for reuse.
Update Schedule
We update our data at different intervals depending on how frequently official sources publish new data:
Tax Data
Annual
January each year
Rent Data
Semi-annual
January & July
Cost of Living
Quarterly
Mar, Jun, Sep, Dec
City/Neighborhood
As needed
When cities expand
Tax CalculationsUpdated annually
Tax rates and brackets are sourced directly from official government tax authorities:
Exchange RatesUpdated daily
Currency exchange rates for accurate cross-border salary comparisons:
Note: ECB data must not be modified. Raw exchange rate series are used as published. Frankfurter API provides historical rate data and volatility calculations.
Cost of Living DataUpdated quarterly
Living costs are derived from official statistical agencies and international organizations:
Note: Eurostat utility data for non-EU countries may have different licensing restrictions.
Rental & Neighborhood DataUpdated semi-annually
Rental prices are compiled from official government housing statistics:
International DataGlobal coverage
Additional international data sources for broader country coverage:
Note: World Bank data provides coverage for non-OECD countries where national statistical office data may be limited.
Geographic & City DataUpdated as needed
City ImagesOpen source media
City photographs displayed in the onboarding flow are sourced from Unsplash:
Note: Unsplash images are provided under the Unsplash License, which grants an irrevocable, nonexclusive, worldwide copyright license to download, copy, modify, and use photos for free, including for commercial purposes, without permission or attribution (though attribution is appreciated).
License Summary
CC BY 4.0
Creative Commons Attribution 4.0 International. Free to share and adapt with attribution.
Open Government Licence
UK government open data license. Free for commercial and non-commercial use with attribution.
Data License Germany 2.0
German open data license. Free to use with source attribution.
ODbL
Open Database License. Free to share, create, and adapt with attribution and share-alike.
Unsplash License
Free to use for commercial and non-commercial purposes. No permission or attribution required.
Disclaimer
While we strive for accuracy, all data is provided for informational purposes only. Tax calculations, cost of living estimates, and rental prices are approximations based on publicly available data. Always consult official government sources and qualified professionals before making financial or relocation decisions.
Last updated: January 2026