About FastPropertyROI
Free property investment calculator
What is FastPropertyROI?
FastPropertyROI is a free property investment calculator that helps you understand the true cost of buying, holding, and selling property. It covers 9 countries, each with locally accurate tax brackets, closing cost structures, and capital gains tax rules.
Whether you're evaluating a buy-to-let in England, a rental apartment in Lisbon, or a residential property in Johannesburg, FastPropertyROI gives you the numbers you need: gross yield, net yield, cash-on-cash return, cap rate, and a multi-year projection showing how your investment grows over time.
Why we built it
Buying investment property involves dozens of costs that are easy to overlook — transfer taxes, legal fees, registration costs, ongoing insurance, and exit costs like agent commissions and capital gains tax. These vary dramatically between countries and are often buried in government documents or scattered across broker websites.
We built FastPropertyROI to put all of these numbers in one place, with a calculator that handles the complexity for you. No spreadsheets, no guesswork.
How the data is sourced
Every country configuration is built from official government sources — revenue authorities, land registries, and regulatory bodies. Each config includes source URLs linking directly to the official documentation used.
Tax brackets, fee tiers, and regulatory details are encoded as structured data and verified against worked examples from official sources. When tax laws or fee structures change, the country configs are updated and re-verified.
Privacy by design
All calculations run entirely in your browser. Your financial inputs — property price, rental income, costs — are never sent to our servers. There is no database, no user accounts, and no tracking. We don't collect or store any personal data through the calculator.
Read our full privacy policy for details.
Not financial advice
FastPropertyROI is an informational tool. The calculations are estimates based on publicly available tax rates and fee structures. They are not a substitute for professional financial, tax, or legal advice. Always consult qualified professionals before making investment decisions.
See our terms of service for full details.
Get in touch
Found a bug, have a feature request, or want to discuss a partnership? We'd love to hear from you.