Investment
Switch between general compounding projections and a simplified rental-property yield estimate without leaving the investment page.
Choose an investment type below to reveal the matching inputs and results model.
Calculator
Use General mode for compound growth projections or Rental Property mode for a simplified annual rental-yield estimate based on rent and service charges.
Future value based on full completed compounding periods.
Total gain: $0.00
If you start with $0 and earn 0% every 0 weeks, after 0 years your investment would grow to about $0.
Month and year conversions use average civil day lengths (30.4375 days per month, 365.25 days per year), and partial periods are rounded down.
Investment knowledge
The compounding formula can be exact while the assumed return remains uncertain. Use the tool to compare assumptions and understand sensitivity.
In General mode, the return you enter applies once to each completed compounding interval. Seven percent per year is therefore completely different from seven percent per month. The interval is part of the assumption, not merely a display preference.
Future investment returns are not guaranteed. A precise ending balance only shows what the formula produces if the selected return repeats as entered. Comparing a lower, middle, and higher scenario is often more informative than treating one rate as a forecast.
Rental mode divides income by property value after subtracting the annual costs you enter. It intentionally reports gross and net rental yield rather than claiming to calculate a complete leveraged ROI, which could also depend on financing, acquisition costs, appreciation, taxes, vacancy, and sale proceeds.
A useful scenario test keeps most inputs fixed while changing one variable—rate, duration, or compounding interval. This makes it easier to see which assumption actually drives the result and how sensitive the projection is to that choice.
General mode models one initial amount and a repeated per-period return; it does not automatically add recurring contributions, fees, taxes, inflation, or withdrawals. Rental mode includes only the rent, service charges, property value, and other annual expenses entered by the user. Those boundaries are intentional so the result can be understood and reproduced rather than hiding assumptions inside a single number.
How it works
Compound growth depends on both the rate and the interval to which that rate applies. The guide explains completed compounding periods, negative returns, and the simplified rental-yield model.