The most property maths you'll ever need in one app.
Stamp duty, financing, tax, and returns — calculated properly, for wherever in the world you're deploying capital. BRRRR, cap rate, DSCR, negative gearing, 1031 exchange — the tools serious investors actually use, localised across 7 markets.
Is there a more detailed property tool out there?
Most international property calculators cover 3–4 countries with basic mortgage maths. Most property investment tools are US-only. Stresst does both — everywhere.
Based on the team's own research of publicly available tools. July 2026.
Stop guessing. Run the numbers.
Five decision points that turn a property spreadsheet into a clear next move. Enter your assumptions, see the result, then pressure-test it before the offer goes in.
Every result is an estimate based on the inputs you provide. Review the assumptions, sources and dates before relying on any figure.
Local tax, done right
Stamp duty, transfer tax, CGT, and income tax rules rebuilt per country. Not approximated. Not copied.
Investor-grade tools
BRRRR, DSCR, Cap Rate, HMO, negative gearing, 1031 exchange. The tools serious investors actually use.
A human when you need one
When the numbers raise questions, connect directly with a property finance specialist through the app.
Built for people who actually need the numbers right.
BRRRR Calculator
Model the full Buy, Refurb, Rent, Refinance, Repeat cycle in one place.
DSCR Calculator
Debt Service Coverage Ratio — how investment lenders assess your deal.
Negative Gearing
Model the tax benefit of a negatively geared property in Australia.
Growth Rate Research
Multi-decade official data across 7 countries — three scenario ranges.
Not just calculators — you'll actually understand the numbers.
Every calculator comes with a plain-English guide explaining what it is, how to read the result, and what to do next.
Where do our growth rates actually come from?
Every figure in the app is sourced from official government and central bank data — not estimated, not averaged from blogs.
Read the methodologyUseful numbers need honest boundaries.
Stresst is designed to help you ask better questions of a property deal. It does not tell you what to buy, and it is not a lender, broker or financial adviser.
Assumptions stay visible
See the inputs behind a result instead of accepting a mystery number.
Dates matter
Rates and guidance can change. Check the current-as-of date before acting.
Are the calculator results financial advice?+
No. The results are estimates for information and planning only. They are not personal financial advice, a mortgage offer or a recommendation to buy, sell or refinance. Consider speaking to a qualified professional about your circumstances.
Can I change the assumptions behind a result?+
Yes. The calculators are built around the variables that materially change a property decision, such as rate, term, deposit, rent, costs and growth. Change an input and compare the new result rather than relying on a single scenario.
How should I use a calculator before making an offer?+
Use it to create a range of outcomes, check the costs you may have missed and understand where the deal becomes sensitive. Then verify rates, tax rules, fees and legal details with the relevant current source or professional.
Questions the calculator can't answer?
When the numbers raise questions, our network of property finance specialists can help — available through the app.